Actuator fault estimation and accommodation for switched systems with time delay: Discrete-time case

Dongsheng Du; Bin Jiang

doi:10.1016/j.isatra.2016.02.004

Actuator fault estimation and accommodation for switched systems with time delay: Discrete-time case

ISA Trans. 2016 May:62:137-44. doi: 10.1016/j.isatra.2016.02.004. Epub 2016 Feb 26.

Authors

Dongsheng Du¹, Bin Jiang²

Affiliations

¹ College of Automation, Huaiyin Institute of Technology, 1 Meicheng Road, Huaian, 223003 Jiangsu, China; College of Automation, Nanjing University of Science and Technology, Nanjing 210094, China. Electronic address: dshdu@163.com.
² College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China; Jiangsu Key Laboratory of Internet of Things and Control Technologies (Nanjing University of Aeronautics and Astronautics), China. Electronic address: binjiang@nuaa.edu.cn.

PMID: 26924247
DOI: 10.1016/j.isatra.2016.02.004

Abstract

This paper investigates the problems of actuator fault estimation and accommodation for discrete-time switched systems with state delay. By using reduced-order observer method and switched Lyapunov function technique, a fault estimation algorithm is achieved for the discrete-time switched system with actuator fault and state delay. Then based on the obtained online fault estimation information, a switched dynamic output feedback controller is employed to compensate for the effect of faults by stabilizing the closed-loop systems. Finally, an example is proposed to illustrate the obtained results.

Keywords: Discrete-time switched system; Fault estimation; Output feedback controller; Reduced-order observer.