Fault estimation and active fault-tolerant control for discrete-time systems in finite-frequency domain

Xiaodan Zhu; Yuanqing Xia; Mengyin Fu

doi:10.1016/j.isatra.2019.02.014

Fault estimation and active fault-tolerant control for discrete-time systems in finite-frequency domain

ISA Trans. 2020 Sep:104:184-191. doi: 10.1016/j.isatra.2019.02.014. Epub 2019 Mar 25.

Authors

Xiaodan Zhu¹, Yuanqing Xia², Mengyin Fu³

Affiliations

¹ School of Automation, Key Laboratory of Intelligent Control and Decision of Complex Systems, Beijing Institute of Technology, Beijing 100081, China; School of Mathematics and Statistics Science, Ludong University, Yantai, 264025, China. Electronic address: xdzhu@ldu.edu.cn.
² School of Automation, Key Laboratory of Intelligent Control and Decision of Complex Systems, Beijing Institute of Technology, Beijing 100081, China. Electronic address: xia_yuanqing@bit.edu.cn.
³ School of Automation, Key Laboratory of Intelligent Control and Decision of Complex Systems, Beijing Institute of Technology, Beijing 100081, China. Electronic address: fumy@bit.edu.cn.

PMID: 30975458
DOI: 10.1016/j.isatra.2019.02.014

Abstract

The active fault-tolerant control (FTC) problem for discrete-time systems in finite-frequency domain is addressed based on faults' estimation. By the descriptor system approach, the observers are designed such that the stability and H_∞ performance index of dynamic error systems are analyzed in finite frequency domain. The estimation of faults is obtained by the designed observers. By using the estimation of faults, a H_∞ FTC method is presented to show the stability analyses of closed-loop systems in term of GYP lemma. Numerical simulations are given to demonstrate proposed FTC methods' effectiveness.

Keywords: Estimation; FTC; Finite-frequency rang; Observer.