design and virtual reality - iowa state university · 2015-08-21 · design and virtual reality...
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
1
Design and Virtual Reality
Judy M. VanceProfessor
Mechanical Engineering Department
Iowa State University
Virtual Reality Applications Center
Ames, IA
Program Director, Engineering Design
National Science Foundation
University of Michigan October 10, 2007
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
2
Outline
Virtual Reality Applications Center
Research• Mechanism Design
• Interactive Stress Analysis
• Ergonomic Design
• VR Assembly
• Other Projects
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
3
Virtual Reality Applications
CenterTo be a national leader in the application
of virtual reality to the challenges of science and engineering
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
4
• 15 million USD in contract funding
• 35 active interdisciplinary projects
• 40 faculty investigators from 7 colleges
• 180 graduate and undergraduate researchers
• Sponsors
– National Science Foundation
– Industry
– Government
VRAC
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
5
VRAC Facilities
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
6
Applications Focus
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
7
“Virtual”
• Simulations
• Immersion
– Stereo viewing
– Position tracking
– Haptics
– Sound
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
9
Mechanism Design Using
Virtual RealityTo develop new and innovative methods to design
spherical and spatial four-bar mechanisms based
on the use of virtual reality technology
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
10
Spatial mechanisms offer a feasible alternative to
electronically controlled multiple-input devices such as
robotic manipulators
These mechanisms operate within three-dimensional
(3D) design space and therefore, the use of
three-dimensional interfaces should improve our ability
to design optimal mechanisms.
Motivation
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
11
Osborn, S.W. and Vance, J. M., "A virtual reality environment for synthesizing
spherical four-bar mechanisms," ASME Design Automation Conference
Proceedings, Boston, MA, September 17-21, 1995, Vol. DE-83, pp. 885-892.
SphereVR
Spherical Mechanism Design
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Kraal, Juliet C., and Vance, Judy M., "VEMECS: A virtual reality interface for
spherical mechanism design," Journal of Engineering Design, 2001, 12(3),
245-354.
VEMECS
Virtual Environment MEChanism Synthesis
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Evans, Paul T., Vance, Judy M., and Dark, Veronica J., “Assessing the effectiveness of traditional and virtual reality interfaces in spherical mechanism design,” ASME Journal of Mechanical Design, 121(4), December 1999, pp.507-514.
VEMECS SphinxLarochelle, P., Dooley, J.,
Murray, A., & McCarthy, J. M. (1993)
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Furlong, Todd J., Vance, Judy M., and Larochelle, Pierre M., “Spherical mechanism synthesis in virtual reality,” ASME Journal of Mechanical Design, 121(4), December 1999, pp. 515-520.
Isis
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Kihonge, John N., Vance, Judy M., and Larochelle, Pierre M., "Spatial mechanism design in virtual reality with networking," ASME Journal of Mechanical Design, 124(3), September, 2002, pp. 435-440.
Spatial Mechanism Design
VRNets
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Vance, Judy M., Larochelle, Pierre M., Dorozhkine, Denis, “VRSpatial: Designing spatial mechanisms using virtual reality,” ASME Design Engineering Technical Conferences and Computers and Information in Engineering Conference, Montreal, Canada, September 29-Octover 2, 2002, DETC2002/MECH-34377.
VRSpatial
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
17
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
18
Conclusions
VRSpatial is a novel design tool that offers the
mechanism designers a wide variety of methods
for defining the initial design problem, solving the
problem, and evaluating the solution’s feasibility
Future work will continue to address how to
effectively present the task solution space to the
designers so that appropriate design decisions can
be made in an effective manner
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
19
The purpose of this research is to establish an engineering
framework for design of compliant mechanisms based on
constraint-based compliant mechanism design theory and
virtual reality.
Joint research with Dr. Martin Culpepper, MIT
Compliant Mechanism Design Using
Virtual Reality as a Design Interface
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
20
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
22
Provide interactive stress analysis and accurate
approximations while changing part shapes in
virtual reality with force feedback
Interactive Stress Analysis
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
23
Motivation
Providing a tool where one person can explore the
design space by easily examining the effects
shape changes have on stress distributions will
reduce the design time for new products and
allow designers to find unique solutions that
might be missed using traditional shape
optimization techniques.
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Yeh, T.-P. and Vance, Judy M., “Applying virtual reality techniques to sensitivity-based structural shape design,” ASME Journal of Mechanical Design, 120(4), December 1998, pp. 612-619.
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Chipperfield, K., Vance, J. M., Fischer, A., “ Fast meshless reanalysis using combined approximations, pre-conditioned conjugate gradient, and Taylor series”, AIAA Journal, in press, 2006.
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
26
Methods
Stress Analysis
– Uses stabilized conforming nodal integration for the reproducing
kernel meshless method
– Calculates displacement at any point in terms of nodal coefficients
– Avoids re-meshing for deformations
– Use approximate solutions for speed
i
N
i
i dxΨ=xu
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
27
Fast Approximations
Linear Taylor Series
– Uses stress sensitivities
– Fast enough for real time
– Poor accuracy for large design changes
Pre-conditioned Conjugate Gradient method
– Resolve system of equations
– Iterative technique is more accurate but slower
– Used at intervals to improve solution and compute new sensitivities
ds '
*** fdK
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Fischer, Andrew G. and Vance, Judy M. “An Overview of the VrM3D Virtual Design Program,” 2004 NSF Design, Service and Manufacturing Grantees and Research Conference Proceedings, Dallas, TX, January 5-8, 2004
VrM3D
Catmull-Clark Subdivision
method
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
29
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
30
Conclusions
Fast finite element approximation methods combined
with free form deformation allows the designer to
quickly investigate shape change effects on stress
distributions within a product.
Future work will investigate the use of haptics as an
additional information source and explore
collision detection for assembly.
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
32
Utilize three-dimensional anthropometric
databases for improved ergonomic design of
operator workstations
Ergonomic Design
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
33
Methods
3-D anthropometric data– CAESAR and proprietary databases
– Landmarks, body scans and other custom data types
– Rich set of demographic data available for each subject
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Cerney, M. M., Duncan, J.R., Vance, J.M., "Using Population Data and Immersive
Virtual Reality for Ergonomic Design of Operator Workstations," SAE Digital
Human Modeling Conference Proceedings, Munich, Germany, June 18-20, 2002.
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
37
Explore the use of virtual reality as a tool to
aid in the evaluation of product designs for
assembly
• Assembly methods prototyping
• Discrete event simulation
VR Assembly
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
38
VR Assembly
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
39
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Kim, ChangEun, Vance, J.M., “Development of a networked haptic environment in VR to facilitate collaborative design using Voxmap Pointshell (VPS) software,” ASME Design Engineering Technical Conferences and Computers and Information in Engineering Conference, Salt Lake City, Utah, September 28 to October 2, 2004, DETC2004/CIE-57648.
Networked
Haptic
Environment
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Fischer, A. G., Vance, J. M., "PHANToM Haptic Device Implemented in a Projection Screen Virtual Environment," IPT/EGVE 2003 Workshop Proceedings, Zurich, Switzerland, May 22-23, 2003.
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
42
Discrete Event Simulation in VR
To develop a Virtual Reality training
environment and laboratory for production
assemblers with the aid of concurrent
operations simulation
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
43
Current state of VR simulation
VR-Fact – virtual environment for
modeling and designing factories and
shop floors (Kesavadas and Ernzner,
University of Buffalo).
VRFactory – an interface to a
commercial discrete event simulation
software (SLAM II) (Vance and
Kelsick, Iowa State University).
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
44
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
45
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
46
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
47
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
48
Sponsors
National Science Foundation
Procter & Gamble
General Motors
Deere & Company
Facilities provided by the
Virtual Reality Applications Center
Iowa State University
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Department of
Mechanical Engineering
IOWA STATE UNIVERSITYOF SCIENCE AND TECHNOLOGY
49
www.vrac.iastate.edu
www.vrac.iastate.edu/~jmvance
Judy M. Vance
Contact Information