FALL 2001/WINTER 2002 DYNAMICS AND CONTROL IN AEMES : RAPID GROWTH Overview Langley Research Center. His The Department of Aerospace Engineering, Mechanics and Engi- research at NASA Langley fo- neering Science (AeMES) has moved aggressively over the past cused on supersonic laminar few years to develop a nationally recognized research program with flow control and pressure- and broad expertise in dynamical system theory, control theory and ex- temperature-sensitive paint perimental dynamics. The AeMES Dynamics and Control Group is measurement techniques. His comprised of four full time faculty members and over 20 graduate current research interests lie in students. Current research projects consider open questions in active flow and noise control, acoustics, aeroacoustics, aeroelasticity, flow control, robotics, au- particularly the modeling and tomated rapid retargeting, trajectory tracking control, vibration mod- design of piezoelectric actua- eling and suppression, and spacecraft dynamics and control. The tors and the development and projects are supported by a variety of institutions including the implementation of real-time, Office of Naval Research, the Air Force Office of Scientific Research, adaptive flow control schemes. the Army Research Office, the NASA Langley Research Center, Eglin He is a member of the AIAA Air Force Base, Boeing Company, Pratt and Whitney Corporation, Aerodynamic Measurement and Lockheed Martin Tactical Aircraft Systems. Technology Technical Commit- The People tee and the AIAA Fluid Dy- Dr. L. Cattafesta namics Sub-Committee on Louis N. Cattafesta is one of the most recent additions to the Flow Control. Figures (1) and (2) depict experimental fluid dynamics AeMES faculty and has become a central figure in the evolution of characterization of oscillations in a cavity. the dynamics and control program in the AeMES department. Prior Norman Fitz-Coy is one of the most experienced members of the to joining UF in April of 1999, he was a Senior Research Scientist at dynamics and control group in the AeMES department. He has High Technology Corporation in Hampton, VA, where he founded worked on numerous research projects in widespread applications and headed the Experimental and Instrumentation Group. He re- in multibody dynamics, control and mechanics. His research inter- ceived a BS degree in Mechanical Engineering with Highest Dis- ests include the design of control strategies for systems with tinction in 1986 from Penn State University, a MS degree in Aero- multiobjective criteria, dynamics and control of multiple-flexible- nautics from MIT in 1988, and a Ph.D. degree in Mechanical Engi- body dynamical systems, deployment dynamics for satellites and neering in 1992 from Penn State University, after which he joined spacecraft and autonomous rendezvous and docking. High Technology Corporation as a Research Scientist at NASA Department Chair: Wei Shyy IGHLIGHTS H Editor: Millsaps-Taylor Memorial Lecture David Mikolaitis, Tel: (352) 392-7632, by Prof. Ali Glezer, - Dynamics and Control in AeMES ......... 1 E-mail: dwm@aero.ufl.edu Georgia Institute of Technology, - Passing of Two Greats in Mechanics .... 4 Spring 2002 - GERC’s News ....................................... 6 Associate Editors: Roger Tran-Son-Tay - Knox Millsaps Award ........................... 7 Peter Ifju - Student Chapter News .......................... 7 - Alumni Corner ...................................... 8 Design and layout: Ramji Kamakoti - Millsaps-Taylor Lecture ...................... 8 AeMES Web page URL: http://www.aero.ufl.edu/ The Streamline, AeMES, University of Florida Fall 2001/Winter 2002 Figure (1) Schematic of experimental setup for the study of oscil- lations in cavity flow. Figure (3) Nonlinear multibody model of high mobility vehicle with weapon platform. Developed in conjunction with Dr. Mike Hale, Redstone Arsenal. Density Gradient Density Figure (2) Mach 0.25 Phase-locked movie of 890 Hz cavity mode. He earned his BS, MS and PhD from Auburn University in 1983, 1985, and 1990, respec- tively. Professor Fitz-Coy worked as a research engineer at the Logicon Control Dynam- ics Company until he joined the AeMES faculty as an assistant Figure (4) Detailed suspension of nonlinear multibody model of professor in 1990. Dr. Fitz- high mobility vehicle. Developed in conjunction with Dr. Mike Coy became an associate pro- Hale, Redstone Arsenal. fessor in the AeMES depart- ment in 1996. Visiting Lecturer. Florida’s AIAA Chapter for Outstanding Service to students in Aero- Mechanical Engineering Depa space Engineering. rtment, University of Alabama Benjamin Fregly is one of the newest addition to the dynamics in Huntsville, AL. He has and control group in the AeMES department and brings diverse worked in close collaboration experience in multibody dynamics and biomechanics to the depart- with researchers at the US Dr. N. Fitz-coy ment. Dr. Fregly earned his BS degree from Princeton University in Army Missile Command at the 1986. He subsequently earned his MS and PhD from Stanford Uni- Redstone Arsenal in Hunstville, Alabama. He has been awarded the versity in 1987 and 1993, respectively. Following his doctoral stud- 1992 Henry Pusey Best Paper Award at the 63rd Shock and Vibration ies, Professor Fregly was awarded the Chateaubriand Postdoctoral Symposium. He is currently a member of the American Institute of Fellowship and attended the University of Lyon in 1994 as a Aeronautics and Astronautics and the American Astronautical postdoctoral student. From 1994 until 1999, when he joined the Society. In addition to his diverse research activities, Dr. Fitz-Coy AeMES faculty, Dr. Fregly worked as a research and development has been recognized as an exceptional educator at the University of engineer at the Parametric Technology Corporation. While employed Florida. He has been awarded the Bisplinghoff Teaching Award in at Parametric Technology Corporation, he was a project group leader 1993 and 1994. This award was presented by the University of within the Mechanica Division. This division specialized in the 2 The Streamline, AeMES, University of Florida Fall 2001/Winter 2002 development of engineering analysis software for the simu- lation of a variety of mechan- ics applications. His research within the biomechanics dis- cipline has focused on knee mechanics, and specifically the simulation of the dynamics of the knee. The goals of his cur- rent research are two-fold. One goal is to study issues related to how and why people de- velop osteoarthritis of the knee joint. This is the joint that develops osteoarthritis most commonly. By developing careful models representing the dynamics of the knee, Pro- Dr. B. J. Fregly Figure (6) Nonlinear multibody dynamics model fessor Fregly seeks to simu- of contact and relative motion of the knee joint. quently entered the University of Texas at Austin in August of 1983, and he received his Master of Science Degree in Engineering Me- chanics the following year. He earned his Master of Science Degree for research in experimental modal analysis and structural identifica- tion procedures for highly flexible systems. For his contributions in the field of structural identification during this time of study, he received a NASA Award of Recognition for creative development of a technical innovation in April, 1986. He subsequently worked as a research engineer at Structural Dynamics Research Corporation, in Milford, Ohio. After working as a research engineer in the Geomet- ric Modeling Group at Structural Dynamics Research Corporation, he entered the Department of Engineering Science and Mechanics at the Georgia Institute of Technology as a Presidential Fellow. He earned his Ph.D. in January, 1989. He joined the faculty of the Aerospace Engineering Department at Texas A&M University on January 1, 1989 as an Assistant Professor, and was promoted to Associate Professor in September, 1993. He was awarded a joint appointment in the Department of Mathematics at Texas A&M University, and was recognized as a Select Faculty Fellow at Texas A&M University in 1995. While at Texas A&M University he was an active member of the Center for Mechanics and Control in the Figure (5) Video fluoroscopic image of knee joint used to measure Department of Aerospace En- in vivo bone motion. gineering, the Center for Me- late the effects of surgical decisions, such as the angle at which to chanics of Composites in the cut a bone, to optimize surgical outcomes for arthritis treatments. Department of Aerospace En- In addition, he hopes to propose mechanical interventions to re- gineering, and a member of lieve pain and extend joint life in individuals with early-stage knee the Center for Approximation arthritis. The second goal of his research is to study issues related Theory and the Institute for to wear and improved functionality of artificial knee joints. One of Scientific Computation in the the tasks here is again to simulate the effects of surgical decisions, Department of Mathematics. such as the positioning of the implant components relative to the In July, 1996, he joined the fac- bones, to provide a surgical planning tool. Moreover, it is desired to ulty of the Department of improve current artificial knee designs so that they will last longer Aerospace, Mechanics and and provide greater mobility than current designs. Engineering Science at the University of Florida. His cur- Andrew J. Kurdila provides diverse experience in the control and rent research is in the areas of dynamics group in the AeMES faculty
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