Study On Fault-tolerant Control Of Long-time-delay Networked Control Systems

The data transmission is completed by the communication network in thenetwork control system with complicated structure and wide spatial distribution. Inengineering practice, it will cause serious property damage and personal injury whenthe system failures and there is no security measures to cope with, so it is significantto research fault-tolerant control of network control system. This paper mainly thinksabout long-time-delay, disturbance, uncertain modeling factors, and discuss the robustfault-tolerant control method of network control systems.Firstly, this paper considers the long-time-delay network control systems withdisturbance and without disturbance respectively, and introduces appropriateLyapunov function, then presents for a sufficient condition which can ensure theclosed-loop system remains stable when actuators occur failure according to the H∞control theory. A simulation example is given to verify the feasibility andeffectiveness of the conclusion.Secondly, the long-time-delay network control systems with disturbance andwithout disturbance are taken into consideration to research the robust fault-tolerantbased on Lyapunov stability theory and H∞control theory. And a design method offault tolerant controller is put forward. By this method, it can be guaranteed that theclosed-loop system remains stable when actuators occur partial failure. The feasibilityand effectiveness of the conclusion are verified according to a simulation example.Finally, the augmented fault models with complete failure and partial failure oflong-time-delay network control system with disturbance and uncertain modelingfactors are established. The proof method of a sufficient condition which can ensurethe closed-loop system remains stable when actuators occur failure is provided basedon Lyapunov stability theory and H∞control theory on the basis of the abovementioned. This paper conducts a simulation for the methods and verifies thefeasibility and effectiveness of the conclusion...