Fault estimate and fault‐tolerant control for hybrid systems based on the extended state method

Abstract

This article solves the fault estimation and fault‐tolerant control problem for discrete‐time hybrid systems containing actuator and sensor faults. A novel extended state observer is shown to estimate states and faults of systems, simultaneously. Based on the utilized estimations, a fault‐tolerant controller is proposed so that stochastic stability of closed‐loop models with H∞$$ {H}_{\infty } $$ level is analyzed and sufficient conditions are obtained. A simulation example is given to prove this proposed strategy's effectiveness.

Finite‐time fault estimate and fault‐tolerant control for discrete‐time Markov jump systems with actuator and sensor faults

“…In particular, the results on MJSs have existed in References 24‐30. A $$$ {H}_{\infty } $$$ FD method has been designed for discrete MJS 24 based on a descriptor system method.…”

“…A new method 26 has been proposed. A extended state method 27 has been applied to hybrid systems and then the FE and FTC problem has been solved. A novel descriptor sliding mode observer method based on quantization signal 28 has been proposed to suppress actuator faults by off‐line static compensation of quantization effect and synthesis of a discontinuous input.…”