MAE Seminar
Series
Upcoming
Events:
For additional
information: 202/994-6749 or email cwalker@gwu.edu
MAE Home Page
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2009 |
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November |
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Measurement Science for Intelligent Manufacturing Robotics and Automation
Program Dr.
Tsai Hong 2:00-3:00pm
Nov. 16 Phillips
Hall, Room 736 The next generation of industrial robots will work
side-by-side and interact intelligently with their human counterparts as they
move the factory floor, increasing efficiency and safety. The NIST
Measurement Science Program is working with industry and academia to create the necessary standards,
performance metrics, and infrastructure technology to support and innovate
the development of perception systems, sensors and technology and use of these robots. The program
testbed, including a mobile robot arm, autonomous vehicles, and sensors,
allows NIST to collaborate with developers and users of autonomous robotic technology
and academia, enabling wider adoption of advanced perception, autonomous
navigation, and manipulation and handling techniques in the automotive,
aerospace, and other industries. Short Biosketch: Tsai Hong received her PhD from the University of Maryland
at College Park in
1982. Dr. Hong plays a major leadership role in research activities of perception
systems and perception performance evaluation for manufacturing and autonomous vehicle safety
applications. She is responsible for algorithm design and software
development of several major modules for the Collaborative Technology
Alliances (CTA) perception project in U.S. Army Research Laboratory (ARL),
perception for advanced intelligent manufacturing, dynamic 6DOF pose
measurement methods for manufacturing application, the DARPA LAGR program,
the Indoor Autonomous Vehicle (IAV) project, the Autonomous road Navigation
(AutoNav) project,
and the Next Generation Inspection System (NGIS) project. Dr. Hong currently is
the project leader of the metrology and standard for advanced perception
project. She is responsible for the development and technical supervision of
research projects in developing advanced measurements for real-time
perception manufacturing applicaitions. In addition, her research activities
including
perfromance evaluation of perception systems and real-time vision, world modeling, multi-sensor fusion, temporal
fusion for unmanned vehicles and mobile robots and multi-sensor integration
and control for industrial inspection. The agencies that have sponsored her
research include the U.S. Navy, U.S. Army, DARPA, and NIST internal research
funds. She has served as a doctoral thesis co-advisor and committee member
for various students and has published over 100 articles on the above
research areas. |
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September |
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MAE
SEMINAR SERIES GW Center for Biomimetcs and Bioinspired
Engineering (COBRE) Biologically
Inspired Impulsive Starting and Maneuvering for Solitary and
Aggregate Systems Alexandra H. Techet Mechanical and Ocean Engineering Massachusetts Institute of Technology Monday, September
28, 2009, 2:00 p.m. Academic Center,
Phillips Hall, Room 736 ABSTRACT Fast
starting and maneuvering in the aquatic realm typically involve the formation
of distinct vortex rings that deliver an impulsive change in the animals
momentum. This enables these aquatic animals to maneuver in smaller
spaces than that required by conventional underwater vehicles. Unsteady
flapping by both plates and foils can also generate similar impulsive forces
through short burst cycles, such as a single flap cycle with a fixed
amplitude (figure 1a). Fast starting, jumping and maneuvering fish also
generate vortex rings (figure 1b). Through the coordinated generation of
impulsive forces through vortex ring formation, both solitary and aggregate
systems can improve maneuvering performance. Understanding how fish and
aquatic animals maneuver can help engineers improve the maneuvering
performance of underwater vehicles which often operate in chaotic
environments such as the surf zone. Modeling
the wake of a maneuvering fish as a simple vortex ring, with considerations
taken for added mass effects, allows for straightforward analysis. Thus, by
inspecting the wake generated by a rapidly maneuvering fish one can calculate
the impulse imparted on the body during the maneuver. The swimming and
maneuvering of aggregate swimmers, e.g. those chained together in series or
parallel, can be modeled using a series of distinct vortex rings generated by
each individual in the chain, with some phase shift between each
individual. Particle imaging velocimetry can be used to gain insight
into the mechanisms for vortex ring formation as used in fast-starting escape
responses and classical maneuvers in biological animals. Both laboratory and in
situ studies using both PIV and dye
visualization clearly reveal the vortex ring formation and overall impulse
strength over the time of the maneuver. BIOGRAPHICAL SKETCH Professor Alexandra (Alex) Techet is currently an
Associate Professor of Mechanical and Ocean Engineering at MIT. She received
her B.S.E. in Mechanical and Aerospace Engineering in 1995 from Princeton
University and PhD from the MIT/WHOI Joint Program in Oceanographic
Engineering in 2001. In 2002, after a post-doc at Princeton University in the
Mechanical and Aerospace Engineering Department, Prof. Techet returned to MIT
as an Assistant Professor in the Dept. of Ocean Engineering. Professor
Techet’s research focuses on experimental unsteady marine hydrodynamics in
several key areas, including: water entry of spheres and projectiles, flow
structure interactions, unsteady bio-inspired propulsion and maneuvering, and
sensing at the air/sea interface. Professor Techet was a recipient of the
2004 ONR Young Investigator Award. Her imaging work has been recognized
several times by the APS Gallery of Fluid Motion and has been featured on the
cover of the Journal of Fluid Mechanics. |
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Past Events: |
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2008 |
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Virtual Shapes in Supersonic Flow Control with Energy Addition Dr. Mikhail N. Shneider, Princenton University
Wednesday, November 5, 2008, 3pm
Phillips Hall 7th Floor Conference Room, #736
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Experimental Fluid Studies on Flapping Wing Aerodynamics: The Effect of Wing-Wing Interaction and Chordwise Flexibility on Aerodynamic Performance Dr. Xinyan Deng, University of Deleware Assistant Professor Wednesday, October 22, 2008, 1pm Phillips Hall 7th
Floor Conference Room, #736 |
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Stable and perturbed hovering flight in hawkmoth Dr. Tyson Hedrick,
University of North Carolina at Chapel Hill Tuesday, February 12,
2008, 1pm |
Visuomotor
Convergence in Insects: Applications for Autonomous MAV/UAV Guidance,
Navigation, and Control Dr. J. Sean Humbert,
Universtity of Maryland-College Park Assistant Professor,
Aeropspace Engineering Wednesday, February
6, 2008, 1 PM Phillips Hall 7th
Floor Conference Room, #736 |
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2007 |
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Computational
Fluid Dynamic Challenges and Solutions for Rotocraft Applications James D. Baeder Associate
Professor Monday, November
12, 2007 Phillips Hall, 7th
Floor Conference Room # 736 1:00 pm |
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Decoding Neural
Mechanisms for Multisensory Control of Locomotion
Noah J. Cowan Assistant
Professor Wednesday,
September 26, 2007 Tompkins Hall,
Room 204 1:00 pm |
Low Order Flow
Models: Mean Field Models, Finite Time Thermodynamics and Traveling
Waves Too Gilead Tadmor Northeastern
University Wednesday, October
17, 2007 Phillips Hall, 7th
Floor Conference Room # 736 2:00 pm |
Expanding the Reach of Robots in Medicine: From Macro to
Micro
Dr.
Jake Abbott Institute of Robotics and Intelligent Systems, ETH Zurich Tuesday, March 20, 2007 Phillips Hall, 7th Floor Conference Room
#736 1pm |
Research and
Technology at Edwards Air Force Base Dr. Charles H.
Jones Instrumentation
Research Coordinator Monday, September
17, 2007 Tompkins Hall,
Room 204 1:30 pm |
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Analytical Formulation for Intelligent
Infrastructure Design and Operation by the LiveDesign Paradigm Gautam Dasgupta, Professor Civil
Engineering & Engineering Mechanics Columbia University , New York , NY Wednesday, January 31, 2007 Phillips Hall, 6th Floor Conference Room #640, 3pm |
SAE NASCAR Special Lecture Charles H. Jenckes Engine Development
Engineer Dale Earnhardt,
Inc. Wednesday,
March 7, 2007, 7:00-9:00 pm Jack Morton
Auditorium |
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2006 |
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Size-dependent Mechanics and Applications to Quantum Dots,
Nanoscale Piezoelectricity and Defects |
Dynamics and Controls Research at the Air Force Office of
Scientific Research |
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Patent Law: Practice Before the U.S. Patent and Trademark
Office, Past, Present, and Future |
Studying A Complex Biological System: THE HUMAN TONGUE Dr.
Maureen Stone Departments
of Biomedical Sciences and Orthodontics Thursday,
October 12, 2006, 10am Phillips
Hall 6th Floor Conference Room, #640 |
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Embedded and Immersed
Solvers for Adaptive Unstructured Grids |
Enhanced swimming
performance by flow control in marine mammals Frank E. Fish, Ph.D. |
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Characterization
of Shape Memory Alloy Wires Used in Bias Spring Actuators |
Large-Eddy Simulations of
Biological Flows |
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Advanced Image
Processing-Aided Novel Cardiac Stress Testing |
A Meshfree Approach to Analysis of
Higher Order Continua |
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Remarks on the
Limits of Air-Cooling of Electronics and their Impact on Research Enabling
the Transition to Liquid Cooling; |
From Compliant
Coatings to Vocal Fold Vibration: Dealing With Complex Moving
Boundaries in Fluid-Structure Interaction |
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2005 |
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Dr.
Susan Bowley, PhD Friday, December 2, 2005 |
Ferroelectric
Properties of BaxSr1-xTiO3 Solid Solutions from Molecular Dynamics
Simulations
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Origin Of Large
Electromechanical Coupling In Relaxor Ferroelectrics |
German
Buildings Research and a Discussion of Commissioning for Low Energy Buildings |
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Recent Investigations On
Micromachining In Institute Of Manufacturing Technology At |
Wave
Rotors at Different Scales: Concepts & Applications |
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Vortex Induced Vibrations
Of A Circular Cylinder At Low Reynolds Number |
Coupling of Length Scales for Mechanical Properties:
Thursday, May 12, 2005 |
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Investigation of Brittle Fracture During Indentation
and Scratch Processes: Tuesday,
May 3, 2005 |
Research
in Aeronautical Engineering: Middle East Technical University (METU) Dr.
Nafiz Alemdaroglu |