Study On Robust H_∞ Fault-tolerant Control For Parameter Uncertain Time Delay Systems

Robust fault-tolerant control problem with parametric uncertain has broad applications. It has attracted much attention of research. With the rapid development of science and technology, the traditional methods of control theory shows limitations, more and more, in the serious non-linear factors and parameter uncertainties complex systems. It is an important means of robust H∞fault-tolerant control for improving the reliability of the control system. The resrarch for robust fault-tolerant control with uncertain parameter systems is a theoretical and practical value of the subject.The concept of fault-tolerant control was proposed by the science foundation of national and the electronic and electrical engineers (IEEE) control system in California for control of the border workshops report in September 1986. Fault-tolerant control system is a kind of more general control system, which can adapt to the environment of the significant changes. The guiding ideology of fault-tolerant control system is the control system often occur an inevitably fault, so how to maintain the stability of the system become more and more important when the control system once occur failure.1) Based on T-S fuzzy model, the concept of the so-called Lyapunov stability theory is employed to design robust fault-tolerant controller. A sufficient condition for the systems possessing integrity against the fainures are given. A numerical example is given to illustrate effectiveness.2) Robust fault-tolerant control for singular systems with parameter uncertain and time delay is researched. Using Lyapunov stability theory, a sufficient conditions for the singular systems possessing integrity against the actuator failures are given. The design method of the robust H∞fault-tolerant controller is designed which is dependent on feasibility of LMI.3) Based on T-S fuzzy model, robust fault-tolerant control for NCS control system with parameter uncertain and time delay is researched. A sufficient condition for the systems possessing integrity against the actuator fainures and sensor fainures are given.4) Robust passive fault-tolerant control for parameter uncertain non-linear stochastic systems with distributed delays is researched. Using Lyapunov stability theory, a sufficient conditions for the stochastic systems possessing integrity against the failures are given. The design method of the robust H∞fault-tolerant controller is designed which is dependent on feasibility of LMI. Finally, the results of the thesis are summarized and the further research problems are pointed out.