In this paper, an enhanced sliding mode control (SMC)-based controller known as backstepping-sliding mode control (B-SMC) with an adaptive friction observer is proposed for position tracking control of pneumatic actuators. The adverse effect of friction encountered in the pneumatic actuators which play a major role in pneumatic servo system is highlighted and a solution to rectify this is proposed using an adaptive LuGre-based friction observer for friction compensation. The B-SMC is experimentally applied, for the first time, on a double-acting single-rod industrial pneumatic cylinder. Comprehensive derivation as well as stability proof of the controller is presented. The performance of B-SMC with and without the friction observer is experimentally investigated. From the results, it is clearly observed that the B-SMC with the adaptive friction observer performs better (i.e. reduces the tracking as well steady-state errors of up to 30%) than the one without friction observer. Thus, the adaptive friction observer of B-SMC is identified as the key element that improved the control performance by compensating the adverse effect of friction during the position tracking tasks.
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ASME/BATH 2013 Symposium on Fluid Power and Motion Control
October 6–9, 2013
Sarasota, Florida, USA
Conference Sponsors:
- Fluid Power Systems and Technology Division
ISBN:
978-0-7918-5608-6
PROCEEDINGS PAPER
Position Tracking of a Pneumatic Actuator Using Backstepping-Sliding Mode Control With Adaptive Friction Observer
Ramhuzaini Abd. Rahman,
Ramhuzaini Abd. Rahman
University of Manitoba, Winnipeg, MB, Canada
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Nariman Sepehri
Nariman Sepehri
University of Manitoba, Winnipeg, MB, Canada
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Ramhuzaini Abd. Rahman
University of Manitoba, Winnipeg, MB, Canada
Nariman Sepehri
University of Manitoba, Winnipeg, MB, Canada
Paper No:
FPMC2013-4447, V001T01A028; 9 pages
Published Online:
February 26, 2014
Citation
Abd. Rahman, R, & Sepehri, N. "Position Tracking of a Pneumatic Actuator Using Backstepping-Sliding Mode Control With Adaptive Friction Observer." Proceedings of the ASME/BATH 2013 Symposium on Fluid Power and Motion Control. ASME/BATH 2013 Symposium on Fluid Power and Motion Control. Sarasota, Florida, USA. October 6–9, 2013. V001T01A028. ASME. https://doi.org/10.1115/FPMC2013-4447
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