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access icon free Fault-tolerant control for linear systems with multiple faults and disturbances based on augmented intermediate estimator

  • Author(s): Jun-Wei Zhu 1  and  Guang-Hong Yang 1, 2
    • View affiliations
    • Affiliations: 1: College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, People's Republic of China ;
      2: State Key Laboratory of Synthetical Automation of Process Industries, Northeastern University, Shenyang, Liaoning 110819, People's Republic of China
  • Source: Volume 11, Issue 2, 20 January 2017, p. 164 – 172
    DOI:  10.1049/iet-cta.2016.0267 , Print ISSN 1751-8644, Online ISSN 1751-8652
© The Institution of Engineering and Technology
Received 14/03/2016, Accepted 06/10/2016, Revised 23/08/2016, Published 11/10/2016

This study investigates the observer-based fault-tolerant control (FTC) problem for linear systems with multiple faults and external disturbances. Two novel types of FTC schemes are proposed, namely, the intermediate estimator-based parameter adjustment (IEBPA) FTC scheme, which deals with linear systems with matched disturbances and the intermediate estimator-based (IEB) H ∞ FTC scheme, which is applicable to linear systems with mismatched disturbances. For the case with matched disturbances, it is shown that the IEBPA FTC scheme ensures the states of the closed-loop system to be uniformly ultimately bounded with an explicit bound. For the case with mismatched disturbances, it is proved that the IEB H ∞ FTC scheme guarantees the closed-loop to be robustly stable with a prescribed H ∞ performance index. A simulation example is given to illustrate the effectiveness of the proposed methods.

Inspec keywords: linear systems; fault tolerant control; robust control; closed loop systems; H∞ control; observers

Other keywords: observer-based fault-tolerant control problem; IEBPA FTC scheme; mismatched disturbances; intermediate estimator-based H∞ FTC scheme; prescribed H∞ performance index; linear systems; external disturbances; closed-loop system; multiple faults; intermediate estimator-based parameter adjustment FTC scheme; IEB H∞ FTC scheme; matched disturbances; augmented intermediate estimator

Subjects: Linear control systems; Stability in control theory; Simulation, modelling and identification; Optimal control

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