Research On Active Fault Tolerant Predictive Control For Netwoeked System

Networked Control System is a system which forward and feedback channels connected by a network.It is gradually replacing the traditional control system.With its many advantages,it has been widely used in many fields,such as aerospace,wireless communication,industrial system,intelligent transportation and other fields.While networked control system is widely applied in many fields,it also brings new problems,such as network induced delay,packet loss and disorder communication constraints,fault tolerant control for networked control system etc..Such problems threaten the performance and security of networked control systems.How to deal with the problem of active fault tolerant control of networked control systems with communication constraints is the research direction of this paper.In this paper,we study the problem of active fault tolerant control for networked linear discrete systems,which is involved of the fault of actuator or sensor fault or both of them.An active fault tolerant control strategy based on network predictive control is designed.For the actuator fault,introducing the method of adaptive fault observer to this method to estimate the state and fault information at the same time;About the sensor fault,a new fault observer is designed to estimate the state and sensor fault,and eliminate the influence of faults on the state estimation in the observer design;For both actuator and sensor faults occurring,a cooperative observer designed to simultaneously estimate the state,actuator and sensor faults.Then,the predictive control law based on the state feedback control with fault compensator is designed,and the effect of the network delay is eliminated.Secondly,under the premise of the basic method,the output tracking control is added to meet the output tracking performance of the system with actuator fault.Finally,the effectiveness of the proposed method is verified by theoretical analysis and simulation results.