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Networked Control Systems (Networked Control System, NCS) in a feedback control system to achieve information sharing and transmission network for the transmission medium. In engineering practice, NCS are more dispersed, complex and large the event of a failure, the harm will be incalculable and make up, so its fault-tolerant design, improved security, reliability is a theoretical and practical significance. research topic. The fault-tolerant control NCS in recent years has made some preliminary results. Boils down to performance, and more robust integrity and robust H_ ∞ integrity issues mainly practice not only hope that the closed-loop system is stable when a fault occurs, and also hope to have the performance; model uses The model of a single state delay, and delay lower bound 0 processing, and thus the results with a larger conservative;, state feedback control strategy, greater limitations in engineering applications. Based on this, the conservative starting from the results of reduction, respectively, the state feedback control strategies and dynamic output feedback strategy, based on the state consider the delay lower bound delay model, taking into account the network-induced delay and packet loss, with parameters uncertainty NCS system robust fault tolerant control research. Specific content includes: based on state feedback control strategy using Lyapunov stability theory and LMI approach, respectively, for not considered or consider the impact of external disturbances of finite energy, a the uncertain NCS robust with time-varying delay and packet loss complete and robust guaranteed cost robust H_ ∞ integrity, robust H_ ∞ guaranteed cost problem. By constructing suitable Lyapunov-Krasovskii functionals, respectively, push certificates to ensure that the closed-loop NCS actuator or sensor failure, malfunction, with robust integrity, the robust guaranteed performance, or the robust H_ ∞ integrity, robust H_ ∞ guaranteed cost less conservative delay-dependent sufficient condition, and through the appropriate conversion to solving LMIs method gives the the corresponding controller optimized design method. Dynamic output feedback control strategies, using Lyapunov stability theory, the the LMI methods and matrix separation technology not considered or consider the impact of external disturbances of finite energy, respectively, for the uncertain NCS with time-varying delay and packet loss robustness completeness and robust H_ ∞ integrity issues. Case delay segment and not on the system model augmented by constructing appropriate Lyapunov-Krasovskii functionals, respectively, and Proof of the actuator or sensor failure, malfunction, is robust and complete delay-dependent sufficient condition, sexual and robust H_ ∞ integrity and matrix separation lemma, effective nonlinear form of separation to solving LMIs are given the robust fault tolerant and robust H_ ∞ controller design method. On the basis of the above theoretical research, using the corresponding example of all the results of the correctness and validity of the simulation study. Model considering the delay lower bound, and the proof is not model transformation and cross terms Zoom, the appropriate liberties matrix variables introduced fragmentation process and delay are making their results less conservative, thus feasibility and satisfaction of the fault-tolerant.
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