Fault tolerant control with disturbance estimator for a class of linear parameter varying systems subject to time-varying fault

Abstract

This paper proposes a sliding-mode control (SMC) scheme for a class of linear parameter varying (LPV) systems subject to a loss of control effectiveness and external disturbance. The LPV model is transformed into the non-LPV model representation. The updating law for unknown time-varying fault and the disturbance estimator are designed. The novel sliding-mode fault tolerant control (FTC) law is presented by using estimated fault and estimated disturbance to compensate the effects of faults in both cases: the known and the partial known system matrices. The stability analysis of closed-loop system is performed on the Lyapunov theory. The main advantage of the proposed method is to circumvent solving on-line parameter-dependent nonlinear matrix inequalities, also to adapt to the changes of unknown parameter. The feasibility of the approach is illustrated by means of the simulation examples.

Research on Satisfactory Integrated Design of Event-Triggered Fault Accommodation and Network Communication Saving for NCSs With Actuator Saturation Under Non-Uniform Transmission

“…With the increasing scale and complexity of networked control systems (NCSs), the fault-tolerance ability is no longer the luxury property of NCSs, and it will become an essential feature to ensure that the system performance is maintained under all eventualities [1]. Therefore, as an important technology for improving system safety and reliability [2], the fault-tolerant control of NCSs is attracting increasing attention and some outstanding research results [3]- [5] have been achieved in recent years. In actual industry processes, the controlled plant is often more or less subject to nonlinear properties, which leads to a substantial amount of nonlinear controlled plant.…”