Legged mobility of robotic systems is an active area of research. Quantitatively understanding mobility of these systems on natural terrain is critical for design and operations of these systems. In this paper, we present results of computational simulations of legged mobility on granular terrain using massively parallel Discrete Element Method. We model the interactions of a leg from a micro ground vehicle with sandy terrain made of polydispersed granular media. In these simulations, we model the interactions between millions of granules and the leg to quantify ground reactions and associated qualitative behaviors. The simulations are run on parallel computers to overcome the severe computational complexity of simulating these large problems in physically feasible time-frames. We are using high fidelity first-principles approaches to model emergent complex behavior that cannot otherwise be modeled. We present results from a parametric sweep where different leg speeds and penetrations are used to understand differences in ground reaction.
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ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 4–7, 2013
Portland, Oregon, USA
Conference Sponsors:
- Design Engineering Division
- Computers and Information in Engineering Division
ISBN:
978-0-7918-5596-6
PROCEEDINGS PAPER
Massively Parallel Discrete Element Modeling of Legged Mobility on Granular Terrain
Rudranarayan Mukherjee,
Rudranarayan Mukherjee
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA
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Isaac Kim
Isaac Kim
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA
Search for other works by this author on:
Rudranarayan Mukherjee
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA
Isaac Kim
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA
Paper No:
DETC2013-13329, V07AT10A068; 8 pages
Published Online:
February 12, 2014
Citation
Mukherjee, R, & Kim, I. "Massively Parallel Discrete Element Modeling of Legged Mobility on Granular Terrain." Proceedings of the ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 7A: 9th International Conference on Multibody Systems, Nonlinear Dynamics, and Control. Portland, Oregon, USA. August 4–7, 2013. V07AT10A068. ASME. https://doi.org/10.1115/DETC2013-13329
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