Event-triggered adaptive fault-tolerant bounded control for a class of non-strict feedback nonlinear systems with input quantization

Abstract

The issue of event-triggered adaptive fault-tolerant control (FTC) for a class of non-strict feedback nonlinear systems (NSs) with input quantization, and sensor and actuator faults (SAAF) is investigated in this paper, where SAAF can be both additive and multiplicative. By using backstepping method with fuzzy logic systems (FLSs), an event-triggered adaptive fault-tolerant controller is proposed. Accordingly, the event-triggered scheme and the quantization control are employed to change the signal transmission and alleviate the transmission burden. One feature of the proposed controller is that the control signal is bounded with a known bound in advance which can be ensured via tuning feedback control gains. Asymptotical stability analysis of the closed-loop systems is established. Furthermore, when the considered system subjects to additive and multiplicative sensor faults simultaneously, all the system states are bounded; in this situation the system output can converge to zero with multiplicative sensor faults. Finally, a single-link manipulator system is considered to illustrate the proposed control method and verity its effectiveness.