UIO-based Fault Estimation and Accommodation for Nonlinear Switched Systems

  • Haoshuang Chen
  • Dongsheng DuEmail author
  • Dewen Zhu
  • Yan Yang
Regular Papers Control Theory and Applications


This paper investigates the problems of fault estimation and fault accommodation for a class of nonlinear switched systems. First, an augmented switched system is constructed by forming an augmented state vector composed of the state vector and the fault vectors. Then, an unknown input observer (UIO) is designed for the augmented switched system to estimate the augmented state vector. With the assist of the average dwell-time (ADT) method and the switched Lyapunov function technique, sufficient conditions are obtained to guarantee that the error system is globally uniformly asymptotically stable (GUAS) with a prescribed H performance index. An algorithm is provided to show the procedures on how to design the UIO. Moreover, the results are extended to the measurement disturbances case. Based on signal compensation principle, a dynamic output feedback controller is designed to ensure the asymptotical stability of the closed-loop system. Finally, simulation results are presented to demonstrate the proposed technique.


Dynamic output feedback controller fault estimation nonlinear switched systems UIO 


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Copyright information

© Institute of Control, Robotics and Systems and The Korean Institute of Electrical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Haoshuang Chen
    • 1
  • Dongsheng Du
    • 1
    Email author
  • Dewen Zhu
    • 1
  • Yan Yang
    • 1
  1. 1.Faculty of AutomationHuaiyin Institute of TechnologyHuaian, JiangsuP. R. China

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