| With development of the science and technology, analysis and research ofmany complex actual systems using the traditional control algorithms have beenpowerless so more complicated science is proposed. As a special and importantclass of hybrid systems, switched systems which mainly studies hybrid systemsfrom point of control science, is an international frontier direction on hybridsystems theory study. In engineering practice, many practical systems exist timedelay, which is the source of oscillation and unsteadiness. The time delayincreases the difficulty for theoretical analysis and engineering application of thecontrol system, producing poor performance, even difficult to guarantee thestability of system. So, the problem of uncertain time delay system control hasbecome a hot issue.Sliding mode control as a special class of nonlinear control, its uniqueadvantage is the invariability for sliding mode dynamic of the system meeting thematching conditions of uncertainty, which is also known as the ideal robustness.The most widely application of sliding mode control is the robust control. Inaddition, based on the efficiency and complexity of modern industrial systems,their reliability and security are paid more attention. Fault-tolerant controlprovide a new way for improving the reliability of highly complex systems. Thefault-tolerant control is applied to uncertain delay switched systems, which willcontribute to improving the reliability and security of the switched systems. Thecombination of both the sliding mode control and fault tolerant control is appliedto analyze and control uncertain time delay switched systems, which is theeffective method to improve the robustness and reliability of the system.This paper is devoted to the time delay switched systems with externaluncertain interference and unmatched uncertain state. Introducing sliding mode variable structure control method based on multiple Lyapunov function andlinear matrix inequalities theory. Further, suppose the actuator of the systemfailures, the fault tolerant control based on sliding mode is discussed, whichimproves the stability and reliability of the system. Simulation results show thatthis design sliding mode fault-tolerant controller, which not only has therobustness overcoming external interference and internal uncertaint, but also hasthe fault-tolerant performance overcoming the failure of the actuator.Finally, making summary of the full work, some inadequacies are proposed. |
