This paper describes a study of the performance of a servo-driven dry-friction damper employed in a vehicle suspension application. The damper is force-controlled via an electrohydraulic pressure control system. Previous experimental work showed that the theoretically predicted system performance does not reflect actual system behaviour because of both the residual back-pressure which produces an undesired constant-amplitude damping force and reduced hydraulic system bandwidth due to presence of free air within the hydraulic fluid. Possible solutions are proposed and performance assessed against a simulated system with dynamic performance purposely worsened. The first issue can be addressed by spring-preloading the friction damper so as to compensate the constant force caused by the residual back-pressure. The second issue can be tackled by closing a local pressure control loop around the control valve. The friction damper is controlled by a variable structure scheme that performs spring force compensation tracking. Bond graphs are employed as a tool for modelling and designing the control system.
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ASME 7th Biennial Conference on Engineering Systems Design and Analysis
July 19–22, 2004
Manchester, England
ISBN:
0-7918-4173-1
PROCEEDINGS PAPER
Performance Enhancement of a Friction Damper System Using Bond Graphs
Roger F. Ngwompo,
Roger F. Ngwompo
University of Bath, Bath, UK
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Emanuele Guglielmino,
Emanuele Guglielmino
University of Bath, Bath, UK
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Kevin A. Edge
Kevin A. Edge
University of Bath, Bath, UK
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Roger F. Ngwompo
University of Bath, Bath, UK
Emanuele Guglielmino
University of Bath, Bath, UK
Kevin A. Edge
University of Bath, Bath, UK
Paper No:
ESDA2004-58288, pp. 795-803; 9 pages
Published Online:
November 11, 2008
Citation
Ngwompo, RF, Guglielmino, E, & Edge, KA. "Performance Enhancement of a Friction Damper System Using Bond Graphs." Proceedings of the ASME 7th Biennial Conference on Engineering Systems Design and Analysis. Volume 1. Manchester, England. July 19–22, 2004. pp. 795-803. ASME. https://doi.org/10.1115/ESDA2004-58288
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