Abstract
We are experimenting with a prototype implementation of a simulation system for rigid body motion where the objects to be simulated are specified by a geometric description and a few symbolic data, such as object density, the type of hinge between certain bodies, and environmental factors. In our approach, the system automatically generates the appropriate mathematical model describing the current system dynamics, and revises the model so as to account for unanticipated changes in the system’s topology. For example, when simulating impact behavior, the system will not know in advance what objects might collide at which points, thus invalidating the usual approach of defining constraint forces between point pairs that are negligible except when the points are in close proximity. We describe the overall organization of the system, and give a general method to effect this self-modification. Focusing on characteristic cases such as gaining or losing contact and low-velocity collision, we discuss our experience with the system, its flexibilities, and its limitations.
Supported in part by NSF Grant CCR 86-19817, ONR Contract N00014-86-K-0465, and a grant from the ATT Foundation
Supported in part by NSF Grant DMC 86-17355, and ONR Contract N00014-86-K-0281
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References
M. Chace (1985), “Modeling of Dynamic Mechanical Systems” CAD/CAM Robotics and Automation Institute and Intl. Conf., Tucson, Feb. 1985.
J. Cremer (1988), Ph. D. Dissertation, Cornell University, in preparation.
P. Cundall, R. Hart (1985), “Development of Generalized 2-D and 3-D Distinct Element Programs for Modeling Jointed Rock”, Misc. Paper SL-85-1, US Army Corps of Engineers, Waterways Experiment Station, Vicksburg, Miss., Jan. 1985.
B. Gilmore (1986), “The Simulation of Mechanical Systems With a Changing Topology,” Ph.D. Dissertation, Mechan. Engr., Purdue University, August 1986.
C. Hoffmann, J. Hopcroft (1987), “Simulation of Physical Systems from Geometric Models,” IEEE J Robotics and Aut RA-3, June 1987, 194 — 206.
J. Latombe, C. Laugier, J. Lefebvre, E. Mazer, J. Miribel (1984), “The LM Robot Programming System”, Robotics Research, 2nd Intl. Symp., Kyoto, 1984, MIT Press, 1985, 377–391.
T. Lozano-Perez, M. Mason, R. Taylor (1984), “Automatic Synthesis of Fine-Motion Strategies for Robots”, Intl. J. of Robotics Research 3:1, 3–24.
M. Mason (1984), “Mechanics of Pushing”, Robotics Research, 2nd Intl. Symp., Kyoto, 1984, MIT Press, 1985, 421–428.
M. Peshkin, A. Sanderson (1985), “The Motion of a Pushed, Sliding Object; Part 1: Sliding Friction”, Robotics Inst., Carnegie-Mellow Univ., TR 85–18
M. Peshkin, A. Sanderson (1986), “The Motion of a Pushed, Sliding Object; Part 2: Contact Friction”, Robotics Inst., Carnegie-Mellon Univ., TR 86–7
M. Takano (1984), “Development of Simulation System of Robot Motion and its Role in Task Planning and Design Systems”, Robotics Research, 2nd Intl. Symp., Kyoto, 1984, MIT Press, 1985, 223–230.
J. Wittenburg (1977), “Dynamics of Systems of Rigid Bodies”, B.G. Teubner, Stuttgart, W.Germany, 1977.
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© 1988 Springer-Verlag Berlin Heidelberg
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Hoffmann, C.M., Hopcroft, J.E. (1988). Model Generation and Modification for Dynamic Systems from Geometric Data. In: Ravani, B. (eds) CAD Based Programming for Sensory Robots. NATO ASI Series, vol 50. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-83625-1_22
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DOI: https://doi.org/10.1007/978-3-642-83625-1_22
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-83627-5
Online ISBN: 978-3-642-83625-1
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