Abstract
Faults and failures in the system components are two main reasons for the instability and the degradation in control performance. In recent decades, fault-tolerant control (FTC) approaches have been introduced to improve the resiliency of control systems against faults and failures. In general, FTC techniques are classified into active and passive approaches. This paper reviews fault and failure causes in control systems and discusses the latest solutions that are introduced to make the control system resilient.The recent achievements in fault detection and isolation (FDI) approaches and active FTC designs are investigated. Furthermore, a thorough comparison of several different aspects is conducted to understand the advantage and disadvantages of various FTC techniques to motivate researchers to further developing FTC and FDI approaches.
Highlights
In the classic control theory, it is assumed that all the components work properly and precisely.experience has taught us that this assumption cannot be guaranteed all the time, and on many occasions, system components might face some faults or failures in their task
The application of sliding mode observers has been widely investigated for linear time-invariant (LTI) systems, and the required conditions for SMO were defined as matching and minimum phase conditions [134]
The Fuzzy logic (FL) has been successfully implemented for designing the fault detection and isolation (FDI) system
Summary
Alireza Abbaspour 1, *, Sohrab Mokhtari 1 , Arman Sargolzaei 2 and Kang K. Received: 29 July 2020; Accepted: 9 September 2020; Published: 15 September 2020
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