This paper introduces a novel model reduction technique, namely Sub-System Global Modal Parameterization (SS-GMP), for real-time simulation of flexible multibody systems. In the past, other system-level model reduction techniques have been proposed for this purpose, but these were limited in applicability due to the large storage requirements for systems with many rigid degrees-of-freedom (DOFs). However, in the SS-GMP approach, the motion of a mechanism is split up into a global motion and a relative motion of the (sub-)system. The relative motion is then reduced according to the Global Modal Parameterization, which is a model reduction procedure suitable for closed chain flexible multibody systems. In combination with suitable explicit solvers, the SS-GMP approach enables (hard) real-time simulations due to the strong reduction in the number of DOFs and the conversion of a system of differential-algebraic equations into a system of ordinary differential equations. The proposed approach is validated numerically with a quarter-car model. This fully flexible mechanism is simulated faster than real-time on a regular PC with the SS-GMP approach while providing accurate results.
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ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 28–31, 2011
Washington, DC, USA
Conference Sponsors:
- Design Engineering Division and Computers and Information in Engineering Division
ISBN:
978-0-7918-5481-5
PROCEEDINGS PAPER
A Novel Approach to Real-Time Flexible Multibody Simulation: Sub-System Global Modal Parameterization Available to Purchase
Frank Naets,
Frank Naets
Katholieke Universiteit Leuven, Leuven, Vlaams-Brabant, Belgium
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Gert H. K. Heirman,
Gert H. K. Heirman
Katholieke Universiteit Leuven, Leuven, Vlaams-Brabant, Belgium
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Wim Desmet
Wim Desmet
Katholieke Universiteit Leuven, Leuven, Vlaams-Brabant, Belgium
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Frank Naets
Katholieke Universiteit Leuven, Leuven, Vlaams-Brabant, Belgium
Gert H. K. Heirman
Katholieke Universiteit Leuven, Leuven, Vlaams-Brabant, Belgium
Wim Desmet
Katholieke Universiteit Leuven, Leuven, Vlaams-Brabant, Belgium
Paper No:
DETC2011-47187, pp. 873-881; 9 pages
Published Online:
June 12, 2012
Citation
Naets, F, Heirman, GHK, & Desmet, W. "A Novel Approach to Real-Time Flexible Multibody Simulation: Sub-System Global Modal Parameterization." Proceedings of the ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 4: 8th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, Parts A and B. Washington, DC, USA. August 28–31, 2011. pp. 873-881. ASME. https://doi.org/10.1115/DETC2011-47187
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