The Co-Design Method for Robust Satisfactory H / H Fault-Tolerant Event-Triggered Control of NCS with - Safety Degree

ABSTRACT

Based on discrete event-triggered communication scheme (DETCS), this paper is concerned with the satisfactory H_∞ / H₂ event-triggered fault-tolerant control problem for networked control system (NCS) with α -safety degree and actuator saturation constraint from the perspective of improving satisfaction of fault-tolerant control and saving network resource. Firstly, the closed-loop NCS model with actuator failures and actuator saturation is built based on DETCS; Secondly, based on Lyapunov-Krasovskii function and the definition of α -safety degree given in the paper, a sufficient condition is presented for NCS with the generalized H₂ and H_α performance, which is the contractively invariant set of fault-tolerance with α -safety degree, and the co-design method for event-triggered parameter and satisfactory faulttolerant controller is also given in this paper. Moreover, the simulation example verifies the feasibility of improving system satisfaction and the effectiveness of saving network resource for the method. Finally, the compatibility analysis of the related indexes is also discussed and analyzed.

Keywords:

Satisfactory / fault-tolerant control, Co-design and compatibility analysis, Actuator saturation constraint, Discrete event-triggered communication scheme.