Command Filter-Based Adaptive Fuzzy Finite-Time Output Feedback Control of Nonlinear Electrohydraulic Servo System

By Jiafeng Li, Ruihang Ji, Xiaoling Liang, Shuzhi Sam Ge, Hao Yan. IEEE Transactions on Instrumentation and Measurement, 2022

446 citations recorded by the source corpus.

In this article, the command filter-based adaptive fuzzy finite-time output feedback control (FOFC) is investigated for the electrohydraulic servo system. For the uncertainties in the system, we utilize fuzzy logic systems (FLSs) to estimate these uncertain nonlinearities, and a fuzzy state observer is established to approximate the unmeasurable hydraulic cylinder stem speed and the internal cylinder force. Then, a command filter-based FOFC is proposed to achieve high tracking precision, where the tracking errors can be regulated into a small neighborhood around the equilibrium proved by the Lyapunov finite-time stability theory. Moreover, a command filter is introduced to avoid the explosion of complexity in the backstepping procedure, where a compensation mechanism is developed to compensate for filter errors. Finally, simulation results are provided to demonstrate the effectiveness of the proposed control.

Subfields: Control and Systems Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/d62a0233aac076fb1f6723e9750a1f03182ce4f9