Day 2 :
Keynote Forum
James D. Turner
Texas A&M University, USA
Keynote: Revisiting taylor series models for astrodynamics applications
Time : x
Biography:
James D. Turner completed his PhD in 1980 from Virginia Tech. He has held several positions of increasing responsibility in Industry, before returning to Academia in 2006. He is a research professor in the Aerospace Engineering Department of Texas A&M University. His research spans dynamics and control, estimation theory, optimization, computational vision, and bioinformatics. He co-founded the nationally unique Land, Air, and Space Robotic Laboratory at Texas A&M, for spacecraft and robotic proximity operations in an operationally relevant environment. He has published one book, more than 92 papers in reputed journals, and 155 Conference Proceedings.
Abstract:
Taylor series methods for generating solutions to differential equations have existed since the earliest developments Calculus. For many years these methods have fallen out of favor because of the complexity and sheer volume of work required to derive and code vector differential equation time derivative models. Experience for these solution strategies has indicated that >10 derivative terms are often required. The advantage of Taylor series models is that larger step sizes can be used for propagating the solutions. Many tools exist for linking computer-aided algebra tools for generating symbolic Taylor series models. This work develops closed-form arbitrary order analytic time derivative models for celestial mechanics applications that allow nonlinear Taylor series models to outperform the state-of-the-art numerical integration methods. Three computational advantages are realized: (1) self-adapting step size algorithm (no tuning or analyst intervention required), (2) double precision accuracy achieved over the entire LEO to GEO range of applications, and (3) very high-speed computation achieved. Though initially derived for particle models these same computational benefits are expected for Taylor series models that extend to rigid-body attitude/trajectory coupling behaviors. The improved integration performance is attributed to these models retaining 10+ derivative terms, whereas, existing numerical methods sample an equation multiple time to generate an average estimate of the behavior, where 4-8 derivative orders are approximated.
Keynote Forum
Mark J. Balas
Embry-Riddle Aeronautical University, USA
Keynote: : The Role of infinite dimensional direct adaptive control in quantum information systems
Time : 09:40-10:10
Biography:
Mark Balas is a distinguished faculty member in Aerospace Engineering at Embry-Riddle Aeronautical University. He was formerly the Guthrie Nicholson Professor of Electrical Engineering and former Head of the Electrical and Computer Engineering Department at the University of Wyoming. He has the following technical degrees: PhD in Mathematics, MS Electrical Engineering, MA Mathematics, and BS Electrical Engineering. He has held various positions in industry, academia, and government. Among his careers, he has been a university professor for over 30 years with RPI, MIT, University of Colorado-Boulder, and University of Wyoming, and has mentored 42 doctoral students. He has over 350 publications in archive journals, refereed conference proceedings and technical book chapters. He has been visiting faculty with the Institute for Quantum Information and the Control and Dynamics Division at the California Institute of Technology, the US Air Force Research Laboratory-Kirtland AFB, the NASA-Jet Propulsion Laboratory, the NASA Ames Research Center, and was the Associate Director of the University of Wyoming Wind Energy Research Center and adjunct faculty with the School of Energy Resources. He is a life fellow of the AIAA, a life fellow of the IEEE, and a fellow of ASME. But he is best known as the father of the Denver drum and bass DJ known as Despise, who is his daughter Maggie.
Abstract:
Many control systems are inherently infinite dimensional when they are described by partial differential equations. Currently there is renewed interest in the control of these kinds of systems especially in flexible aerospace structures and the quantum information field. Since the dynamics of these systems will not be perfectly known, it is especially of interest to control these systems adaptively via low-order finite-dimensional controllers. When systems are subjected to unknown internal delays, they are also fundamentally infinite-dimensional in nature. In our work, we have developed direct model reference adaptive control and disturbance rejection with very low-order adaptive gain laws for as infinite –dimensional systems on Hilbert spaces.
Quantum Information Systems are fundamentally infinite dimensional. And the basic operations that can be performed on quantum systems to manipulate information are unitary quantum gates. Because of the nature of entanglement at the quantum level these gates suffer from decoherence and cannot operate in a fully unitary way. It is also quite difficult to perform experiments that would identify all the parametric data needed to create precise models of a particular quantum system. Instead direct adaptive control that is suited to infinite dimensional systems could provide a reduction in the decoherence and allow the quantum gates to function in a more idealized unitary way.
This talk will focus on the effect of infinite dimensionality on the adaptive control approach and the conditions required for asymptotic stability with adaptive control. Then I would like to go on and consider some of the issues in the control of quantum information systems. The topics here may sound highly technical, maybe even forbidding, and to some extent they are. But I hope to give you a version of them that will be reasonably accessible and will still remain as exciting and attractive to you as they are to me.
Keynote Forum
Ramesh K. Agarwal
Washington University, USA
Keynote: Shape optimization of supersonic bodies to reduce sonic boom signature
Time : 10:10-10:40
Biography:
Ramesh Agarwal received PhD from Stanford University in 1975 and post-doctoral training at NASA Ames Research Center in 1976. From 1976 to 1994, he was the Program Director and McDonnell Douglas Fellow at McDonnell Douglas Research Laboratories in St. Louis. From 1994 to 2001, he was the Sam Bloomfield Distinguished Professor and Executive Director of National Institute for Aviation Research at Wichita State University in Wichita, KS. He is currently the William Palm Professor of Engineering at Washington University in St. Louis. He is the author/co-author of nearly 250 archival papers and over 500 conference papers. He is on the editorial board of 20+ journals. He is a Fellow of eighteen societies including AIAA, ASME, ASEE, SAE, IEEE, APS, and AAAS among others. He is the recipient of many honors and awards.
Abstract:
The focus of this paper is on the simulation and shape optimization of the Lockheed SEEB-ALR and 69 Degree Delta Wing-Body in supersonic flow. For flow field calculation, the commercial CFD flow solver ANSYS Fluent is employed. The near field pressure disturbance is used to determine the strength of the sonic boom signature. The computational results for the two experimental test cases are first compared with the experimental data. The body shapes are then optimized using a single-objective genetic algorithm. The results show a significant decrease in strength of the sonic boom. The sonic boom propagation code s-Boom is employed to compute the signatures on the ground. Appropriate scaling law relating the boom from a full size vehicle to the boom from a small scale model is employed.
- Track 1: Fluid Mechanics
Track 2: Aerodynamics
Track 3: Airship Design & Development
Track 4: Flight Vehicle Navigation
Session Introduction
Gholamhossein Liaghat
Kingston University, UK
Title: Study of interaction between aluminum facing and honeycomb structure in quasi-static and impact loading
Time : 12:25-12:45
Biography:
Gholamhossein Liaghat has completed his PhD at the age of 29 years (25 years ago) from University of Manchester Institute of science and technology (UMIST), UK and postdoctoral studies from Manchester University. He is professor of mechanical engineering and the director of Impact Mechanics Research Group and Laboratory at Tarbiat Modares University Tehran, Iran and currently visiting professor at Kingston University, London, UK. He has published more than 110 papers in international journals and conferences and serving as an editorial board member of IJCM.
Abstract:
In this paper, interaction between aluminum facing and honeycomb structure in quasi-static and impact loading has been investigated experimentally. The structural elements used in this research were aluminum skin plataluminum 5052 honeycomb structure. The quasi-static penetration tests and ballistic impact experiments were performed on aluminum plate, honeycomb structure and sandwich panel by flat ended penetrator and flat ended projectile, respectively. Failure mechanisms, ballistic limit velocities, absorbed energies due to penetration, damage modes and some structural responses were studied. Also, the effect of interaction between aluminum facing and honeycomb structure in quasi-static penetration and ballistic impact response in this honeycomb sandwich panel was discussed and commented upon.
Ahmad Ramadan
Arab Academy for Science, Technology and Maritime Transport, Egypt
Title: : Power captured experimentally from water wave using the wave hunter system
Time : 12:45-13:05
Biography:
A.Ramadan has completed his Ph.D the age of 35 years from Helwan University Faculty of Engineering after finishing the scholarship period from DAAD. He studied at Institute for Fluid Dynamics and Ship Theory (FDS) of Hamburg University of Technology (TUHH), in the field of wave energy conversion system.Mr. Ramadan is lecturer in the basic science department - College of Engineering and Technology, Arab Academy for Science and Technology and Maritime Transport (AAST) Cairo. Mr. Ramadan has published 7 papers in international conferences and journal.
Abstract:
The most critical problem that faces the modernization and development of any country is the energy crisis. This issue is strongly appeared in the last decades due to the rise in fossil fuel price and environmental impact of combustion. The world will need new energy supplies and an upgraded energy infrastructure to meet the growing demands for electric power and transportation fuels. For this situation, much clean energy is expected to blossom for satisfy the energy amount for this civilization, which is inflating. Wave energy is one of the green energy available annually and has enormous energy stored. However, the problem is that type of energy has not been effectively used so far. A new design is introduced to the wave energy conversion system to produce power from regular and irregular waves. This system is called WAVE HUNTER. Furthermore, the results introduce the experimental testing evaluation of this system with some innovative float shapes in water tank.
Volkan AKGÃœL
Bartin University,Turkey
Title: : Effect of post fuel injection timing on combustion and emissions in a direct injection diesel engine
Time : 13:05-13:25
Biography:
Volkan AKGÜL has completed his MsC. from Yildiz Technical University (Y.T.U) Mechanical Engineering Department and he is currently doctoral student of Professor Muammer ÖZKAN at Y.T.U.
Abstract:
Multiple injection strategies can be used to reduce emissions resulting from diesel engine combustion. Post injection which means injection of small amount of fuel after the main fuel injection is one of the part of such injection strategies and it is generally used to improve in-cylinder soot oxidation process. This paper presents the effect of post fuel injection timing on in-cylinder combustion characteristics and emission formation. Three dimensional 72 degree sector grid which represents the 1/5 of full cylinder geometry was created and solved in AVL’s CFD code FIRE numerically. Obtained results evaluated by means of in-cylinder pressure, temperature, heat release rate and resulted emissions.
Gholamhossein Liaghat
Kingston University, UK
Title: Interaction between polyurethane foam and aluminum honeycomb in quasi-static penetration
Time : 14:10-14:30
Biography:
Gholamhossein Liaghat has completed his PhD at the age of 29 years (25 years ago) from University of Manchester Institute of science and technology (UMIST), UK and postdoctoral studies from Manchester University. He is professor of mechanical engineering and the director of Impact Mechanics Research Group and Laboratory at Tarbiat Modares University Tehran, Iran and currently visiting professor at Kingston University, London, UK. He has published more than 110 papers in international journals and conferences and serving as an editorial board member of IJCM.
Abstract:
In this paper, interaction between polyurethane foam and honeycomb structure in quasi-static penetration has been investigated experimentally. The structural elements used in this research were aluminum plate, aluminum 5052 honeycomb structure, and three types of polyurethane foam. The physical and mechanical properties of three types of polyurethane foams were determined. Honeycomb cores were filled with these foams. The quasi-static penetration tests were performed on foam filled honeycombs as well as unfilled honeycombs by flat ended penetrator. Failure mechanisms, ballistic limit velocities, absorbed energies due to penetration, damage modes and some structural responses were studied. Also, the effect of interaction between polyurethane foam and honeycomb structure in quasi-static penetration response in this honeycomb sandwich panel was discussed and commented upon.
Zafer BASKAYA
Istanbul Technical University, Turkey
Title: Unsteady bubbly cavitating nozzle flows
Time : 14:30-14:50
Biography:
Baskaya holds BSc in Mechanical Engineering and PhD in 2011 from Faculty of Aeronautics and Astronautics of Istanbul Technical University (ITU). He carried out his early research in cavitation and buble dynamics at ITU. Dr. Baskaya specializes in computational fluid dynamics and is also interested in applications of these numerical methods to various engineering problems, including Quasi-one-dimensional nozzle flows and Unsteady cavitating flows. He has published papers in reputed journals and is a member of NFPA and ASME. Dr Baskaya has also power industry experience that covers thermodynamic cycles, heat transfer and fluid flows. Dr. Baskaya is Chief Engineer at Unit Investment N.V and has more than fifteen years of engineering and applications expertise in the power plants.
Abstract:
Unsteady quasi-one-dimensional and two-dimensional cavitating nozzle flows are considered using a homogeneous bubbly flow model. For quasi-one-dimensional nozzle flows, the system of model equations is reduced to two evolution equations for the flow speed and bubble radius and the initial and boundary value problems for the evolution equations are formulated. Results obtained for quasi-onedimensional nozzle flows capture the measured pressure losses due to cavitation, but they turn out to be insufficient in describing the twodimensional structures. For this reason, model equations for unsteady two-dimensional bubbly cavitating nozzle flows are considered and, by suitable decoupling, they are reduced to evolution equations for the bubble radius and for the velocity field, the latter being determined by an integro-partial differential system for the unsteady acceleration. This integropartial differential system constitutes the fundamental equations for the evolution of the dilation and vorticity in twodimensional cavitating nozzle flows. The initial and boundary value problem of the evolution equations are then discussed and a method to integrate the equations is introduced. The numerical simulation of 2D cavitating nozzle flows is obtained by the CFD-Tool CATUM, which is based on an equilibrium phase transition model. Results obtained for a typical cavitation cycle show instantaneous high pressure pulses at instances of cloud collapses.
Ahmad Ramadan
Arab Academy for Science, Technology and Maritime Transport, Egypt
Title: Innovative design investigation of an augmented drag vertical axis wind turbine under unsteady characteristics
Time : 14:50-15:10
Biography:
A.Ramadan has completed his Ph.D the age of 35 years from Helwan University Faculty of Engineering after finishing the scholarship period from DAAD. He studied at Institute for Fluid Dynamics and Ship Theory (FDS) of Hamburg University of Technology (TUHH), in the field of wave energy conversion system.Mr. Ramadan is lecturer in the basic science department - College of Engineering and Technology, Arab Academy for Science and Technology and Maritime Transport (AAST) Cairo. Mr. Ramadan has published 7 papers in international conferences and journal.
Abstract:
The important of wind energy is increased nowadays in many countries according to intensive electric power demand. Most of the wind turbine designs are conducted with large scale to build farms of power plants. These types are high cost as initial and installation cost. This work is concerned with a new type of vertical axis wind turbine (VAWT), which is provided with a nozzle. The nozzle is used to duplicate the wind speed in the region whose have speeds not more than 3 m/s. Moreover, this design is promising in the zones of wind speed less than 4 m/s to be a stand-alone unit for electric generation. The study is performed numerically to survey the influence of this nozzle on the performance and power coefficient of the Drag Vertical Axis Wind Turbine (DVAWT). This type of electric power generation is intended for rural and domestic application. The results indicated that the new design increases the power coefficient by 1.5% compared with the conventional Drag turbine.
Abdel Rahman
Alexandria University, Egypt
Title: Performance improvement of simple and combined cycle power plants by gas turbine inlet air conditioning using absorption cooling system
Time : 15:10-15:30
Biography:
Mohamed Elberry is a Ph. D. candidate in the mech. eng. dept., Alexandria University. He is a Certified Energy Manager form the American Society of Energy Engineers. Also, Green House Gases Lead Verifier. With his 20 years of experience, Mohamed has assumed many technical and managerial positions in the Oil and Gas Sector in Egypt and Middle East. The last official job title was Director-QHSE in Air Liquide Egypt. Currently, occupies the position of Managing Director of a small size training and consultancy office. He has been recently, nominated as the first Responsible Care National Expert by the Federation of Egyptian Industries.
Abstract:
Simple and Combined Cycle Gas Turbines are involved in the production of 50% of the total electricity generated in Egypt. Despite of their numerous advantages, they are nevertheless negatively impacted by ambient temperature: on hot days power demand increases while gas turbine power falls. A significant decrease in the generation efficiency occurs at high ambient temperature due to lower air density and the resulting increase in compressor specific work. Achieving substantial saving in produced electricity by adding an inlet air cooling system to gas turbine has become an approved and well recognized technology. In the present paper, an integration of a (Lithium Bromide–Water) absorption inlet air cooling scheme to a cooled gas turbine-based combined cycle was analyzed. The waste heat energy of the exhaust gas prior to the exit of the waste heat recovery steam generator was chosen to power the cooling system. Nubaria Power Station, 120 km South East of Alexandria has been selected as a reference plant for the present study. It includes 3 generation modules, each including 2*264 MW GT and 250 MW ST. A thermodynamic model of the overall integrated scheme of the cooling and power cycles is introduced. A parametric study of the effect of different operational conditions, namely; ambient temperature, relative humidity, compressor inlet air temperature, and part load on performance parameters was carried out. The model shows an increase of 11% in the produced electricity when the inlet air was cooled from 30 oC to 10 oC, Also, harvesting of condensed fresh water at a rate of 3.5 gm per kg of inlet air at ambient relative humidity of 60%. The model results have been verified by observing the real performance of the plant at various ambient conditions and by comparison with ABSIM software results at similar working assumptions.
Fuat OKUMUÅž
Gediz University, Turkey
Title: Experimental fatigue analysis and investigation of optimal- angle ply orientation of composite tubes under variable cyclic loading
Time : 15:30-15:50
Biography:
Fuat OKUMUŞ has completed his PhD at the age of 35 years from Fırat University and postdoctoral studies from TSK School of Engineering. He is the director of mechanical engineering of Engineering Faculty of Gediz university. He has published more than 16 papers in reputed journals.
Abstract:
In this study, optimal angle-ply orientation of symmetric composite tubes under fatigue loading is investigated. 60The fiber-reinforced plastic tubes were manufactured from S-glass/polyester. The layers were manufactured symmetrically in [750]2, [600]2, [500]2, and [450]2 orientations. Burst pressure of filament-wound composite tubes under alternating pure internal pressure was measured experimentally. Internal fatigue pressure testing method was applied to the composite tubes in close-ended condition. For this study, a programmable logic controlled (PLC) hydraulic pressure testing machine has been employed. The static burst pressure values of specimens were measured; subsequently, fatigue test pressure was applied in 75, 60, and 50 % stress levels of burst pressure for each orientation. Damage propagations of the composite tubes on these stress levels were observed as whitening ,leakage, and final failure for [600]2, [450]2, and orientations. When the damage propagation of [750]2 angle-ply tubes was observed, whitening and leakage did not occur and final failure occurred suddenly. Stress-cycle curves obtained from the tests are given in graphics. Experimental results reveal that variation in stress levels and the winding angles have considerable effects on final failure cycles, which is also presented graphically.
- Track 10: Bio Engineering & Bio-Mechanics
Track 14: Heat Transfer Systems
Track 15: Applications of Aerospace Technology
Track 16: Mechanical Engineering & Management
Session Introduction
Gustavo Franco Barbosa
Federal University of Sao Carlos, Brazil
Title: Aviation manufacturing towards to Industry 4.0: a review
Time : 16:05-16:25
Biography:
Gustavo has completed his PhD at the age of 38 years from Engineering School of Sao Carlos USP. He is the Professor of Mechanical Engineering at UFSCar focused on Manufacturing and Automation processes. Background on product integrated development, processes planning, startup of industrial plants, shop floor assistance, training of engineers and implementation of automated solutions on production processes. His current responsibilities are focused on prospection, development and innovation of technologies for manufacturing regarding automated solutions. He has published more than 10 papers in reputed journals and has been serving as a reviewer of some important journals.
Abstract:
This paper reviews the applications of Industry 4.0 concepts within the aerospace manufacturing processes. A contextual overview of Robotics, Additive Manufacturing, Augmented Reality, Internet of Things, Simulation and Aircraft Industry is provided. Some applications of Robotics integrated with other Industry 4.0 principles are showed in order to present the trend of Industry 4.0 principles in different areas of manufacturing. This paper presents some innovations in aerospace industry related to Industry 4.0 and how its benefits and advantages can be reached day by day. Finally, it has been concluded that Industry 4.0 brings gains productivity, quality, costs reduction and increase the competitiveness of any business.
Edgardo ROGGERO
Universidad Tecnologica Nacional, Haedo, Argentina
Title: QUAVER – simple quasistatic verification test approach
Time : 16:25-16:45
Biography:
Edgardo Roggero, Postgraduate in Aerospace Technology from Universidad Tecnologica Nacional (Argentina). University: currently is Professor, Director of a Master Degree in Satellite Technologies and Director of the Aerospace Technology Group. Argentine Space Agency (CONAE): currently is Deputy Project Manager of SABIA-Mar Satellite International Project.
Marcelo Cerocchi, Postgraduate in Aerospace Technology from Universidad Tecnologica Nacional (Argentina). University: currently is Professor, Co-Director of the Aerospace Technology Group. Argentine Space Agency (CONAE): currently is the Agency Assurance Manager.
Abstract:
Spacecraft structures are designed to support the maximum quasi-static loads they will be subjected to during their lifetime. It is a normal practice in these space projects to perform a test to qualify this structural design. The standard testing approach is achieved by subjecting the structure or satellite to those loads using a wiffle tree, a centrifuge machine or an electrodynamic shaker. Each one of these testing options has its own weak points: wiffle tree is not able to test actual flight spacecrafts; centrifuge tests require a very expensive facility and can only be used to test low mass spacecrafts and the current electrodynamic shaker tests have maximum mass and minimum frequency limitations. Because of these limitations, a simple and efficient alternative that can fulfill almost any mass, frequency and load requirement is herein proposed. This non-conventional approach is based in the simplest way to generate a quasi-static acceleration wave using the spring-mass-damper concept. Due to its simplicity, this system does not require high technology components helping to obtain a very low cost quasi-static testing machine. Then, the main objective of this presentation is to show the key characteristics of this solution including a detailed table comparing its performance versus the standard ones, finally it must be highlighted that in spite the design to be presented is able to test spacecrafts from 100 to 4000 kg this concept has no limitations for testing lighter or heavier satellites.
Shawn A. Putnam
University of Central Florida, USA
Title: Heat transfer coefficient characterization in the thermal and hydrodynamic boundary layers of flowing fluids and evaporating thin-films
Time : 16:45-17:05
Biography:
He is working as an Assistant Professor in the University of Central Florida, USA. His Research Interest includes:-Thermal management; Magneto-optics; Advanced energy storage and conversion; Bio-molecular interfaces; Thermodynamics and Materials manufacturin
Abstract:
Transient heat fluxes in cutting-edge computing systems, electro-magnetic switches, and diode-pumped lasers can exceed 50 MW/m2, which is nearly the heat flux radiated by the Sun. To manage extreme thermal loads, the State-of-the-Art is to boil and evaporate liquid coolants on micro- and nano-structured heat sinks. However, modern cooling techniques cannot manage extreme heat fluxes under transient conditions. Thermo-fluid transients due to on/off device operation or system exposure to an extreme environment result in highly unstable thermo-fluid behavior, ultimately placing a liquid-cooled device in danger of catastrophic failure via thermal runaway -- i.e., a rapid, uncontrolled increase in device temperature.
This talk will cover our application of optical pump-probe diagnostics to characterize the local, transient heat transfer coefficient (HTC) in confined geometries: (i) HTC in a developing thermal boundary layer in a microchannel and (ii) HTC in evaporating thin-films. We focus on the heat transfer coefficient because it is the most important thermo-fluid parameter to understand in active, two-phase thermal management applications. Specifically, we use a differential form of the anisotropic Time-Domain Thermoreflectance (TDTR) technique to measure the HTC as a function of fluid flow rate (or Reynolds number, Re) and evaporating thin-film thickness. For example, studies with flowing fluids in microchannels consist consists of single-phase, degassed water flowing in a rectangular microchannel (hydraulic diameter: Dh = 480 µm with local spot heating by the pump TDTR laser beam. Relative to the HTC measured with non-flowing (static) fluids, we find a 30% in the HTC for single-phase water flowing at Re ~ 1800.
Shawn A. Putnam
University of Central Florida, USA
Title: Heat transfer coefficient characterization in the thermal and hydrodynamic boundary layers of flowing fluids and evaporating thin-films
Biography:
He is working as an Assistant Professor in the University of Central Florida, USA. His Research Interest includes:-Thermal management; Magneto-optics; Advanced energy storage and conversion; Bio-molecular interfaces; Thermodynamics and Materials manufacturing.
Abstract:
Transient heat fluxes in cutting-edge computing systems, electro-magnetic switches, and diode-pumped lasers can exceed 50 MW/m2, which is nearly the heat flux radiated by the Sun. To manage extreme thermal loads, the State-of-the-Art is to boil and evaporate liquid coolants on micro- and nano-structured heat sinks. However, modern cooling techniques cannot manage extreme heat fluxes under transient conditions. Thermo-fluid transients due to on/off device operation or system exposure to an extreme environment result in highly unstable thermo-fluid behavior, ultimately placing a liquid-cooled device in danger of catastrophic failure via thermal runaway -- i.e., a rapid, uncontrolled increase in device temperature.
This talk will cover our application of optical pump-probe diagnostics to characterize the local, transient heat transfer coefficient (HTC) in confined geometries: (i) HTC in a developing thermal boundary layer in a microchannel and (ii) HTC in evaporating thin-films. We focus on the heat transfer coefficient because it is the most important thermo-fluid parameter to understand in active, two-phase thermal management applications. Specifically, we use a differential form of the anisotropic Time-Domain Thermoreflectance (TDTR) technique to measure the HTC as a function of fluid flow rate (or Reynolds number, Re) and evaporating thin-film thickness. For example, studies with flowing fluids in microchannels consist consists of single-phase, degassed water flowing in a rectangular microchannel (hydraulic diameter: Dh = 480 µm with local spot heating by the pump TDTR laser beam. Relative to the HTC measured with non-flowing (static) fluids, we find a 30% in the HTC for single-phase water flowing at Re ~ 1800.
Felix Christopher Frischmann
Technische Universitaet Muenchen, Germany
Title: PROPELLER DESIGN-Software implementation and application of analytical and numerical tools for propeller design and shape optimization
Time : 17:05-17:25
Biography:
Felix Frischmann has completed his Master’s program in Computational Mechanics (M.Sc.) at Technische Universität München (TUM) at the age of 27 years. Since 2011 he is a research assistant and PhD student at TUM in the field of computational mechanics with focus on FEM mesh generation, pre-processing, CAD clean-up and design-through-analysis. Since 2012 he is also working as a freelancer and independent software developer in the field of numerical methods and pre-processing for numerical simulations
Abstract:
Propeller design and shape optimization (Propeller Design): Is a crucial task for propeller-based aircrafts and vehicles concerning their performance, efficiency and usability. For many use cases propeller-based aircrafts have proven to be reliable and cost-efficient. The geometric shape and topology of the propeller is a crucial design variable for such aircrafts. Various numerical tools like Finite Element Analysis (FEA) and Fluid Simulations as well as their coupled interaction Fluid-Solid-Interaction (FSI) can be used to predict the propeller performance and optimize its shape with respect to power, performance and structural stability. Another approach for propeller theory to calculate the static condition is based on empirical data models and the lifting-line theory or vortex theory (see also PROP_DESIGN library by Anthony Falzone). This method is almost purely analytical and utilizes the Biot-Savart law and Kutta-Joukowski theorem. Thus, allows a fast and efficient execution of propeller optimization tasks with little computational resources, because no computationally expensive equations like Navier-Stokes need to be solved.
The author will present a software implementation of this vortex theory for propeller design and optimization based on PROP_DESIGN. Furthermore, the integration of such methods in the mechanical engineering product design and production workflow will be presented. The necessary interaction and interfaces with CAD, CAM and CAE tools, also including the interaction with numerical methods like FEA/FSI for propeller cold shape design are demonstrated. The utilization of machine learning algorithms within an industrially applicable design workflow will be discussed and demonstrated.
Sun-Kyu Lee
Gwangju Institute of Science and Technology, Korea
Title: Micro-topography generation method using a rotating tool actuated by an electromagnetic actuator
Biography:
Sun-Kyu Lee has completed his PhD since 1991 from Tokyo Institute of Technology. He had worked in the R&D of Toyoda and Samsung, Now he is the professor of the Gwangju Institute of Science and Technology, and also board member of the Korea Society for Precision Engineering. He has published more than 20 papers in international journals and has been serving as an editor of International Journal of Precision Engineering and Manufacture since 2011.
Abstract:
This paper presents a micro-patterning or surface texturing technique on the fixed work surface using a proposed new spindle system with a rotating cutting tool controlled by the electromagnetic actuator in real time. The proposed spindle system creates micro-sized patterns using rotating tools such as a micro-milling tool and a micro-grinding wheel. The shaft of the spindle is suspended by air bearings, and an electromagnetic actuator controls the radial motion of the spindle housing instead of the shaft. A PID controller is adopted to make the system stable, and adaptive feedforward cancellation is used to effectively compensate for the run-out of the spindle system during machining. The micro pattern array and the digital images are generated on the electro-less Ni coated workpiece using a single-flute diamond square end mill. The machining results show that the run-out compensation improves
the machining accuracy. It is expected that micro-patterning using the proposed spindle system can be applied over a large surface area which is fixed at the work table.
- Track 8: Design & Development of Rockets
Track 9: Space Engineering
Track 12: Energy Processing
Track 13: Mechanics, Dynamics and Controls
Session Introduction
Paul A. Zeranski
American Public University, USA
Title: Microsatellite propulsion systems for low earth orbit
Time : 10:40-11:00
Biography:
Paul Zeranski recently received a Master of Science in Space Studies with Honors from the American Public University. He also holds a Master of Arts in American History from the American Military University. He has worked for the Department of Defense for 37 years including 26 years of active military service as a military intelligence analyst with the United States Army. He currently lives in York, Pennsylvania with his wife, Claire, and their three children.
Abstract:
Small satellites, less than 1,000 kilograms, are appealing to academia and the small commercial space enterprises, as well as various countries around the world, because they can meet a wide range of complex missions with lower development costs and shorter lead times than large satellite. This study seeks to determine the best type of propulsion system for academia and small commercial space enterprises to use for on-orbit operations, when designing and constructing microsatellites being placed into Low Earth Orbit. The propulsion systems considered are solid propellant motors, liquid bipropellant engines, liquid monopropellant engines, hybrid engines, cold gas thrusters, and pulsed plasma thrusters. The methodology used is a mixed method format with a quantitative and qualitative component. The mixed method design is a convergent parallel method design. The analysis of the data uses a combination of the Generalized Information Network Analysis (GINA) and gap analysis specifically interpreted for analysis of this study’s data which will be obtained from previously published academic works and authoritative books. The results of the combined analysis reveals that each system has its strengths and weakness, however the hybrid engine is determined to be the best propulsion system for academia and small commercial space enterprises to use.
James F. Woodward
California State University Fullerton, USA
Title: At the cutting edge, or beyond the fringe: Does physics allow rapid spacetime transport?
Time : 11:20-11:40
Biography:
J.F. Woodward completed a Ph.D. in history (of science) at the University of Denver in 1972 after obtaining bachelors and masters degrees in physics at Middlebury College and New York University in the 1960s. Retired in 2005, he is emeritus professor of history and adjunct professor of physics at California State University Fullerton where he continues to do experimental work on advanced propulsion and the enigmatic sciences (gravity manipulation). Noting that inertia in general relativity is a gravitational phenomenon where local objects are seemingly instantaneously coupled to distant matter in the universe, he has elaborated a way that transient phenomena can be used to perform said manipulation. This, and other material related to this talk, can be found in his recent book: Making Starships and Stargates: the Science of Interstellar Propulsion and Absurdly Benign Wormholes published by Springer Verlag in 2013. His work is supported by the exotic propulsion initiative of the Space Studies Institute.
Abstract:
For much of the past century a small group of people, never more than a dozen or two until the late 1990s, have pursued schemes that, if successful, would revolutionize how we get around spacetime. After World War II, public attention was focused on spaceflight both by flying saucer crazes and by rocketry. The military end of rocketry was ICBMs. Their civilian counterpart was first the Apollo program and then the Space Shuttle. But almost none of the legions of people involved with either ro9cketry or flying saucers devoted serious effort to trying to solve the propulsion problem. The dozen or two who did found themselves isolated and shunned by mainstream scientists. But allthat changed when Kip Thorne and several graduate students ushered in the era of wormhole physics in 1988 by reverse engineering, at Carl Sagan’s request, the needed conditions to travel to and from the center of the Galaxy 26,000 lightyears distant in little or no time. The requirement turned out to be “wormholes”, spacetime structures predicted by general relativity theory. Six years later, Miguel Alcubierre constructed the “warp drive” “metric” of general relativity that shows what is needed to zip around spacetime, seemingly at speeds faster than the speed of light. The requirement is a Jupiter mass of negative rest mass (“exotic”) matter. This requirement is seemingly so preposterous that almost no one has worked solving how to make wormholes and warp drives. But a fair number of people have worked at less ambitious goals. In this talk I will relate how the work of people known to me has movedus closer to the goal of rapid spacetime transport.
Sanketh Bhat
GE Global Research, India
Title: Digital + physical confluence – Era of intelligent & interconnected machines
Biography:
Sanketh Bhat has completed his PhD from University of Florida in the Department of Mechanical & Aerospace Engineering. He is currently employed as a Lead Scientist with GE Global Research in Bangalore India. His research interests include developing engineering solutions to make cleaner and more environmentally friendly machines and in affordable healthcare.
Abstract:
This talk is intended to highlight the role mechanical and aerospace engineers can play with strong domain knowledge and deep understanding of physics of systems as we usher into the ‘digital industrial’ era. There is a strong need in multiple eco-systems to drive improvements in system efficiency across all sectors and do more with less. ‘Industrial Internet’ can be a potential solution to address this need. The main drivers of the industrial internet are connected ‘smart machines’, the ability to manage and process large data, and advanced analytic algorithms. The industrial internet is expected to be larger than the consumer internet enabling consumers and producers to unlock true potential of current and future assets. The concept of ‘digital twins’, offers the ability to utilize high fidelity models which run real-time on the asset and provide crucial insights into system behavior. This talk will cite a few examples from diverse business segments to drive the point.
Yingyu Hua
Hong Kong Polytechnic University, Hongkong
Title: Design optimization of a beam-based dynamic vibration absorber using the fixed-points theory
Time : 12:00-12:20
Biography:
Yingyu Hua has completed her bachelor and master degree from Nanjing University of Astronautics and Aeronautics of China. She’s currently doing her PhD research in the Department of Mechanical Engineering of The Hong Kong Polytechnic University in Hong Kong. Her research topic is the design of viscoelastic dynamic vibration absorber applied to passive vibration control.
Abstract:
Addition of a dynamic vibration absorber (DVA) to a vibrating structure could provide an economic solution for vibration suppression if the absorber is properly designed and located onto the structure. A common design of DVA is a sprung mass because of its simple structure and low cost. A beam-based DVA is proposed and its design is optimized for minimizing resonant vibration of a beam structure. The beam absorber is modeled as a cantilever beam subjected to the ground excitation from the clamed end. The dynamics of the primary beam structure with the proposed DVA is solved by the mode superposition method. The dynamic compliance at the end of the primary beam connected with a beam absorber is calculated. The numerical analysis result is validated by comparing with the result from Abaqus as well as the Transfer Matrix method (TMM) method. Fixed-points theory is used to derive the analytical expressions for the optimum tuning ratio and damping ratio of the proposed beam-based DVA. It is proved analytically that the proposed optimized beam-based DVA can be more effective than the traditional sprung mass DVA if the proposed design guideline is followed. A case study of the primary cantilevered beam is given to show the differences of two types of absorber (i.e. beam absorber and the traditional sprung mass absorber) in vibration suppression performance.
Alexandre de Macêdo Wahrhaftig,
Federal University of Bahia (UFBa), Brazil
Title: : The rayleigh method applied to a actual 30-m-high metalic pole
Time : 12:20-12:40
Biography:
Alexander M. Wahrhaftig has a degree in Civil Engineering (1991), with a Master in Rehabilitation of Historic Heritage from the University of Las Palmas de Gran Canaria, Spain (1995) and PhD in Civil Engineering (Structures) from the Polytechnic School of USP, São Paulo (2008). He has occupied leadership positions on the execution of works and technical services. In the research area mainly is engaged in static, dynamic, experimental analysis of structures, having scientific papers and one book published. Awarded twice by UFBa for his achievements in the field of innovation in 2013 was honored by the Brazilian Association of Civil Engineers.
Abstract:
An analytical approach based on the Rayleigh method is adopted to calculate the first resonance frequency of a 30-m-high metallic mobile phone pole system, taking into account the geometric stiffness, which includes the concentrated forces along of the height, and the self-weight of the structure. That solution constitutes a geometric nonlinear analysis and can be used to linearize second order effects, important for slender systems, since these effects are include automatically on calculation, without any interactions. However, it is important to bear in mind that actual structures are more complex than simple systems such as beams and columns because the properties of actual structures vary with their length. The mast is manufactured in steel and for that all analysis consider linear behavior. For comparison, a finite element method (FEM)-based computer simulation is performed. First, the axial forces on each segment of the structure are compared. Then, under geometric nonlinearity, the vibration frequency of the fundamental mode is calculated analytically as well as the buckling critical load is dynamically defined. Finally, the structural stiffness is evaluated. The results of the analytical approach are found to differ slightly from those of the FEM-based model. An experimental investigation is carried out to verify that frequency under environment excitation disregarding the damping influence. Considering the historical importance of the Rayleigh method in the field of mechanical vibrations, this work sought its application to an actual structure, along with a comparison of the analytical results with the results obtained using modern computing methods.
Hansen A Mansy
University of Central Florida, USA
Title: Numerical model of inspiratory flow in an animal lung airway tree
Biography:
Hansen A Mansy is working as an Associate Professor in the University of Central Florida, USA. His research interest includes: Vibrational and acoustic phenomena in
biological systems; Acoustic models of soft tissues; Flow induced vibrations; Vibro-acoustic sensors; Electromechanical systems; Digital signal processing; Biostatistics.
Abstract:
Numerical modeling of inspiratory flow in a multi generation pig lung airways was performed for a constant flow rate of 19.2
liter/min (Reynolds number=1150 in the trachea). To validate the model, velocity distributions were compared with previous
measurements and simulations in simplified airway geometries. Simulation provided the distribution of flow velocities in the axial
direction as well as secondary flow patterns. The absolute helicity values were used to visualize vortex core regions in the airways.
This analysis suggested the presence of secondary flow vortices in many bifurcations. The observed flow patterns in the pig airways
were found to vary from that of simplified bifurcation airway models. Results of the flow simulations showed that secondary and axial
flows were comparable in the laminar and turbulent cases. Turbulent kinetic energy in the smaller airways tended to be close to zero
suggesting approaching laminar flow conditions.
James F. Woodward
California State University Fullerton, USA
Title: At the cutting edge, or beyond the fringe: Does physics allow rapid spacetime transport?
Biography:
J.F. Woodward completed a Ph.D. in history (of science) at the University of Denver in 1972 after obtaining bachelors and masters degrees in physics at Middlebury College and New York University in the 1960s. Retired in 2005, he is emeritus professor of history and adjunct professor of physics at California State University Fullerton where he continues to do experimental work on advanced propulsion and the enigmatic sciences (gravity manipulation). Noting that inertia in general relativity is a gravitational phenomenon where local objects are seemingly instantaneously coupled to distant matter in the universe, he has elaborated a way that transient phenomena can be used to perform said manipulation. This, and other material related to this talk, can be found in his recent book: Making Starships and Stargates: the Science of Interstellar Propulsion and Absurdly Benign Wormholes published by Springer Verlag in 2013. His work is supported by the exotic propulsion initiative of the Space Studies Institute.
Abstract:
For much of the past century a small group of people, never more than a dozen or two until the late 1990s, have pursued schemes that, if successful, would revolutionize how we get around spacetime. After World War II, public attention was focused on spaceflight both by flying saucer crazes and by rocketry. The military end of rocketry was ICBMs. Their civilian counterpart was first the Apollo program and then the Space Shuttle. But almost none of the legions of people involved with either ro9cketry or flying saucers devoted serious effort to trying to solve the propulsion problem. The dozen or two who did found themselves isolated and shunned by mainstream scientists. But allthat changed when Kip Thorne and several graduate students ushered in the era of wormhole physics in 1988 by reverse engineering, at Carl Sagan’s request, the needed conditions to travel to and from the center of the Galaxy 26,000 lightyears distant in little or no time. The requirement turned out to be “wormholes”, spacetime structures predicted by general relativity theory. Six years later, Miguel Alcubierre constructed the “warp drive” “metric” of general relativity that shows what is needed to zip around spacetime, seemingly at speeds faster than the speed of light. The requirement is a Jupiter mass of negative rest mass (“exotic”) matter. This requirement is seemingly so preposterous that almost no one has worked solving how to make wormholes and warp drives. But a fair number of people have worked at less ambitious goals. In this talk I will relate how the work of people known to me has movedus closer to the goal of rapid spacetime transport.
- Workshop
Session Introduction
Shawn Paul Boike
Aerospace Consultant at Zodiac Aerospace, USA
Title: New aerospace engineering tech for our world's improved future
Biography:
Abstract:
- Track 5:Vehicle Systems and Technologies
Track 6: Design and Modelling of Aircraft and Helicopter Engines
Track 7: Robotics and Mechatronics
Track 11: Material Processing
Session Introduction
Cho W Solomon To
University of Nebraska, USA
Title: Finite nonlinear responses of uncertain shell structures under non-stationary random excitations
Biography:
Society of Mechanical Engineers and a Professor in the Department of Mechanical and Materials Engineering at the University of Nebraska-Lincoln (UNL). Between 1982
and 1992, he was a University Research Fellow of the Natural Sciences and Engineering Research Council of Canada. He has over 300 technical publications which
includes 5 books and over 100 refereed international journal papers in the areas of nonlinear random vibration, nonlinear finite element method and nonlinear stochastic
control.
Abstract:
Presently, various common approaches in dealing with engineering systems that contain uncertain parameters are essentially
based on probabilistic models, partially or entirely employing the Monte Carlo Simulation (MCS) and hierarchical uncertainty
quantification applying Bayesian inference. Another common category of approaches involves application of perturbation
approximation techniques, such as the so-called Stochastic Finite Element Method (SFEM) and Probabilistic Finite Element Method
(PFEM). Many of these approaches can only deal with systems with small uncertainties or variations of system parameters and
properties. The investigation reported here is concerned with two main objectives. The first main objective is the development of an
approach that is capable of providing finite responses of shell structures with large uncertainties and under non-stationary random
excitations. The latter are encountered during, for example, the re-entry of space shuttles, and the launching of high power rockets
with heavy and expensive payloads. The present approach consists of the FEM and the Stochastic Central Difference (SCD) method
that was previously developed by the author and his associates. The second main objective is the study of the difference between
finite random responses of shell structures with small and large uncertain properties. For tractability and readily available results
for comparison, the nonlinear shell structure studied by the author (2009) is employed in the present investigation. It should be
emphasized that in the present investigation the nonlinear spherical cap is hinged circumferentially. Large uncertainties in modulus
of elasticity and thickness of the shell structure are included in the present investigation.
Antonio Dourado
Federal University of Santa Catarina, Brazil
Title: One versus two: a different philosophy in simulated combat training
Time : 15:05-15:25
Biography:
Antonio O. Dourado is a professor of Flight Dynamics in the Aerospace Engineering Course at Federal University of Santa Catarina, Brazil and editor of the journal Applied Physics Research. He obtained his doctorate in Mechanical Engineering studying military Dynamic Flight Simulators in 2012. Also, he has designed several motion simulators for aeronautic and automotive applications.
Abstract:
Pilots in military aviation are subjected to extreme conditions, like high-g maneuvers and flight in high angle of attack. In this sense, pilots must have good physiologic resistance besides proficiency in aircraft systems and weapons. Some suggest that with next generation aircraft with stealth features, beyond visual range combat will rule the skies. That can be true, but considering the designs of both Russian T-50 and Chinese J-20 and J-31 that give importance to maneuverability and stealth, it is not difficult to imagine an air combat starting in bvr but finishing in a dogfight. With this possible situation in mind, within visual range combat can’t be neglected, and pilots must train hundreds of hours per year to achieve the desired proficiency in ACM. To present day, flight simulation in combat training has a separated approach regarding physiologic and tactical training: use of g-seats coupled with large field of view image projection for tactical training and centrifuges for physiologic training. The drawbacks are clear: g-seat can’t simulate extreme g-loads that undermine pilots stamina and current generation centrifuges (active or passive) can’t be properly used for combat training due limitations described in literature (i.e. motion sickness due Coriolis effect). If one could combine in a simulator, strengths of both systems in one new flight simulator, there’ll be a revolution in combat training. This paper proposes a change in paradigm in combat training, showing a new concept of flight simulator, considering that close combat will be still relevant in the near future.
Shawn Paul Boike
Aerospace Consultant at Zodiac Aerospace, USA
Title: : Insta-Grid & our exciting engineered future
Time : 15:25-15:45
Biography:
Shawn Boike has created, lead, directed, managed, consulted on teams & professionally worked in, fortune 100; NASA, NSF, Boeing, General Dynamics, Lockheed Martin, Northrop Grumman, PPG Aerospace, Honeywell, AAR, HCL Aerospace, GM, FORD and McDonnell Douglas, the USAF’s IMIP.
With over 31 industrious years experience engineering in Aerospace & Product Development, (18 Aircraft) on the B2 Bomber, USAF One, F20, F18, C17, MD11, T45, MD90, MRUAV, 777. 787, 747-8, Apache helicopter, 5 Space ships; SLS, ALS, Atlas II, Atlas IIAS & NASP. Manager of EV's; GM-EV1, Samsungs EV4, India’s Mina REVA and many other high tech programs. Founder of: American Industrial Consultants, Solution Vehicles Co. Soltioncell & Insta-Grid, Author and gained a BSME from MSU and a MBA from San SDSU.
Abstract:
Insta-Grids is the World’s 1st & only patented Wireless Energy & Microwave Fabric which opens up new ideas for the World: (1) Mass production of Insta-Grid for everyone's energy needs. (2) Creation of nuclear/EMP hardened Protecta-Grid to save and improve the U. S. electricity grid, (3) Stationing the first Power-Star satellites, and (4) expansion of the Energy from Space system to 10% the World’s need or ~ 400 Satellites for transmission to ground and numerous in-space applications. America's households, businesses, national defense, and NASA's most ambitious explorations will be stupendously enriched by these revolutionary energy & RF systems.
Power-Star to be known as: aka Energy from Space System refers to the concept of space system that collects solar power via photovoltaic & then transmits it to ground collection stations using visible or microwave radiation. Most important to me is the Future of Energy, Environments & Economy. In addition, we can beam down the power via microwave or lasers and create efficient, affordable desalination salt water to places worldwide. We can also start to control/tame weather by overlapping beams/rays and even some known frequencies causing convection and using upper currents to move it to rain where there are droughts including eliminating tornadoes & bad hurricanes. We can make Space Death rays for vaporizing threats from space (similar to Reagan’s Star Wars dream), also vaporize those threats which cannot be captured (space debris), additionally send a beam out to our Mars or outer planetary transport.
Understand the future doesn’t have to be like the past and demanding to make the Future better - similar to our Race to Space and the moon. In this pursuit one’s destiny is limitless.
Shuh Jing Ying
University of South Florida, USA
Title: Robotics in mechanical engineering
Time : 16:05-16:25
Biography:
He was born in city of Shao-Hing, China in 1930. I attended always the best school in the city. At the age of 16, I graduated from Provincial Shao-Hing High School. Because of the World War II, I like to be in military service, so I entered Chinese Air Force Technology Institute, and graduated with rank of number 3 in the class of 50 students. He served 4 years in the Engine Overhaul Factory in Taiwan China as a Lieutenant, and then I entered National Cheng-Kung University, majored in mechanical engineering. I graduated with number 1 student in the class of 85 students. He came to this country in 1958 and completed M.Sc. at Brown University and Ph.D. at Harvard University in 1966.
He received Outstanding Faculty Award in 1975, Engineer of Year Award in 1985, elected as Fellow of American Society of Mechanical Engineers in 1995, and published a text book ‘Advanced Dynamics’ in 1997. I retired in the year of 2000 and earned a title of Emeritus Professor. Because he like to serve this country and this world, so he is still working with a part time job in the University of South Florida.
Abstract:
Many people have misconception feeling about mechanical engineering, thought that not much can be done in that whole area. Actually mechanical engineering is a major branch in engineering. Just mention a few facts, airplane, ships, automobiles and automations are in the mechanical engineering. Continuous improvements are their responsibilities. Certainly there are many areas in the developing stage I am going to point out one area here – robotics for your attention.
Many works are dangerous for human beings to perform such as test pilots to test fly a newly designed airplane. Sometimes firemen face real difficult to go to a strong burning fire that certainly can be replaced by a robot if possible. In case some people trapped behind a collapsed burning structure, firemen will not be able to reach them, but a small robotic device maybe easy to reach, also a helicopter could be sent to check it out before action. I think these items I mentioned above are in existence but more work can be further developed.
In Iraq and Afghanistan many soldiers injure even die because of ground mines. This problem can be solved if many robotic devices can be deployed ahead of real soldier’s line. Certainly a detector to discover the ground mine is needed for each robot. The metal detector can be used for that. The toy cars can be used for the robot. It is inexpensive and already available.
Hugo d’Albert
Technical University of Munich, Germany
Title: Increasing the quality in product development through process efficiency
Biography:
Hugo d’Albert is PhD candidate at the Chair Product Development, Faculty of Mechanical Engineering at the Technical University of Munich, Germany. His main research
focuses on Product Development Process, Quality Management, and Cost Management. He bases his research on experience gained from various practical oriented
projects.
Abstract:
The increasing of global competence obliges the companies to make the development processes more efficient. In spite of that
fact, the main challenge is the developing of high-quality and cost-effective products to meet the customers’ requirements. This
challenge is notably present in case of customer’s change requests affecting the whole development process. The customer-driven
modification, corrections, or addition during the product development process have to be carried out under high pressure of time.
This fact can have a significant impact on the quality of the final product. In order to meet the requirements, the required changes
need to be effectively transferred to different stakeholder involved in the process. Since communication and cooperation are key
aspects that influence the performance within a development process, the knowledge flows in the related activities must be examined.
It is necessary to analyze the existing knowledge regarding the actual project state and connect it effectively with the customer-driven
engineering changes. Thus, the unnecessary iterations, wasted resources, delays, or failures can be identified and their negative impact
on process and product quality eliminated. This paper presents an approach for increasing quality within product development
process by effective control over knowledge-intensive flows. The goal is the supporting development process to create the products
that meet the customer’s expectations regarding the short-term changes and bring the company competitive advantages. The business
value results from enhancement of quality through efficiency in the product development process.
Vishwas N Bedekar
Middle Tennessee State University, USA
Title: Multimechanism energy harvesting combining Faraday’s law of induction and piezoelectric effect
Biography:
Vishwas N Bedekar received his PhD degree from University of Texas at Arlington. He has several years of experience in synthesis and characterization of piezoelectric and
magnetoelectric materials. He has also worked on carbon based nanomaterials and design and development of energy harvesting devices and systems. He is currently an
Assistant Professor in the Department of Engineering Technology at Middle Tennessee State University. He has authored over 30 publications in peer reviewed journals,
conference proceedings and conference presentations. He has authored 2 book chapters and is reviewer on 10 internationally circulated journals related to materials
science research.
Abstract:
The objective of this study was to design, develop and test a multimechanism energy harvesting device to harvest energy from
mechanical vibrations using two different mechanisms viz. Piezoelectric Effect and Faraday’s Law of Induction. In this study, we
have demonstrated multimodal energy harvesting using piezoelectric and electromagnetic materials, utilizing mechanical vibrations
as primary source of energy. Multimodal Energy Harvesting captures energy from two or more sources or mechanisms using “Product
Effect”. Development of new piezoelectric compositions for enhancing the energy density using conventional ceramic processing
route was followed by design and development of electromagnetic energy harvester. Fabrication of multimechanism device involved
a magnetic levitation harvester with piezoelectric bimorph sandwiched between the two permanent magnets moving inside a coil.
Multimodal energy harvesting enhances output energy of a harvester and can be utilized for many on-board sensor applications such
as harvested energy from a car’s engine vibrations can be used to supply additional energy to the wireless sensors on board, such as
temperature sensor and dashboard indicators, whose power requirements are of the order of several milliwatts (mW).
Mark N. Callender
Middle Tennessee State University, USA
Title: UAS Propeller/rotor sound pressure level reduction through leading edge modification
Time : 17:05-17:25
Biography:
Mark N. Callender earned a BS in Aerospace from Middle Tennessee State University (MTSU), an MS in Aviation Systems from the University of Tennessee Space Institute (UTSI), and a PhD in Engineering Science, with emphases in Thermal and Fluid Mechanics, from UTSI. He worked as a flight test engineer for the U.S. Army Technical Test Center (ATTC) conducting performance and systems flight testing of various Army aircraft. He is currently an Assistant Professor of Aerospace at MTSU where he coordinates the Aerospace Technology Concentration and teaches aerodynamics and aircraft performance and provides research mentorship to undergraduate and graduate students. His research interests include low Reynolds number fluid mechanics, active and passive flow control, micro air vehicle (MAV) lift production, force balance design, propeller sound reduction, the philosophy of time, and Christian apologetics.
Abstract:
Manned aviation is regulated by the Federal Aviation Administration (FAA) in order to provide for safe, secure, efficient, and environmentally responsible aviation in the United States. One environmental issue regulated by the FAA is the noise created by aircraft. Federal Aviation Regulation (FAR) Title 14 Part 36 deals specifically with sound pressure levels (SPL) according to aircraft type when the aircraft are in close proximity to the ground. Minimizing aircraft noise helps to maintain positive relationships between the aviation community and the general public. Unmanned aircraft systems (UAS) are a very rapidly growing segment of the aviation industry within the National Airspace System (NAS); however, there is currently no regulation for UAS SPL. The UAS are regulated, as of August 29, 2016, such that they are mandated to be in close proximity to the ground (no higher than 400 ft). As with manned aircraft, UAS produce high levels of SPL, much of which is due to the propellers/rotors. The combination of close proximity to the ground, high SPL, and increasnig UAS density will most certainly result in a negative public reaction. In order to minimize the audible impact of UAS, the author sought to minimize the SPL of small UAS propellers/rotors via leading edge modifications. The modification consisting of a leading edge comb was inspired by one of the three characteristics found on the flight feathers of certain owls: leading edge comb, trailing edge tuft, and upper surface porosity. The modifications were able to successfully reduce SPL while maintaining constant levels of thrust over a wide range of rpm.
Francisco Bulnes
TESCHA, Mexico
Title: An electromagnetic ship designed by Lie-QED- and their fermionic fock space Principles in superconducting to the future flights
Time : 17:25-17:45
Biography:
Francisco Bulnes has a Doctorate in Mathematics by UNAM, with doctoral thesis “Some Relations between the Vogan-Zuckerman Cohomlogical Induction and the Langlands Classification”. Also he has many papers in mathematical physics. He is a full member of ANS (American Nano Technology), and Head of the Research Department in Mathematics and Engineering, TESCHA. He is Editor-in-Chief of the Journal on Photonics and Spintronics in USA. He has participated and directed to much international conferences and has post-doctorates in Cuba and Russia in the years 2006 and 2014 in infinite Lie theory and the geometrical Langlands program in field theory.
Abstract:
The futurist starship must use quantum electrodynamics principles in the design of a reactor to the electro-anti-gravitational movement and displacement of a vehicle of electromagnetic type considering the production and transference of Eddy currents on their structure to microscopic level and the self-levitation/self-suspension effects that are obtained with the iso-rotations of an component of the proper vehicle. But these effects through certain QED (Quantum Electrodynamics)-Lie electromagnetic space create an enveloping electro-anti-gravitational of the vehicle permitting their sustentation through magnetic levitation. The corresponding wrapping around the vehicle is a fermionic Fock space derived from the application of the QED-Lie electromagnetic tool. The result is a ship whose behavior is very similar to a sidereal object or also to a particle (under other special principles in physics), since the same QED effects could be developed under several photonic and spintronic principles. However, the fundamental energy of the vehicle must be created in the reactor through a Bose-Einstein condensation, whose domain of the QED-transformations on the space produce the different actions as magnetic levitation, electromagnetic impulse, etc