Sliding mode control for a two-joint coupling nonlinear system based on extended state observer
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Published on: August 5, 2013
Ling Zhao1, Haiyan Cheng1, Tao Wang2
1Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, The College of Mechanical Engineering, Yanshan University, Qinhuangdao, 066004, China.
Abstract:
A two-joint coupling nonlinear system driven by pneumatic artificial muscles is introduced in this paper. A sliding mode controller with extended state observer is proposed to cope with nonlinearities and disturbances for the two-joint coupling nonlinear system. In addition, convergence of the extended state observer is presented and stability analysis of the closed-loop system is also demonstrated with the sliding mode controller. Lastly, some experiments are carried out to show the reality effectiveness of the proposed method.
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