CHATTER REDUCTION IN AN ARTIFICIAL MUSCLES ROBOT APPLICATION

M. Chettouh, R. Toumi, and M. Hamerlain

Keywords

Robots, pneumatic artificial rubber muscle, sliding mode control, robust control

Abstract

We are concerned with the control of a 3-DOF robot actuated by pneumatic rubber muscles. The system is highly non-linear and somehow diļ¬ƒcult to model; variable structure system control imposes itself as a very relevant type of control. This paper presents two types of robust controls. One uses a classical variable structure (CVS) control associated to a PID control; the other is a derivative control. Both controllers are implemented on a robot driven by artificial rubber muscles. The goal is the comparison of the two controllers in their ability to reduce chatter. Experimental results are presented and discussed.

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