Finite‐time tracking control for pneumatic servo system via extended state observer

Abstract

In this study, a non‐singular fast terminal sliding mode finite‐time tracking control strategy is presented to improve response rapidity and control precision of a pneumatic servo system via an extended state observer. The extended state observer is designed to estimate total disturbances of the system. Moreover, the proposed controller is established to ensure good performances of the closed‐loop system. In addition, both sufficiently small observation error and stabilisation of the closed‐loop system are proved in finite time. Finally, experimental results show the effectiveness of the proposed method.