Study On Robust H_∞ Control And Packet Dropout For Singular Networked Control Systems With Long Time-delay

Networked Control Systems is a loop control system which the state feedback controller based on network transform information. Compared with the traditional control systems, Networked Control Systems has the advantage of less cost, maintaining easily, installing conveniently and being shared by others and so on. Networked Control Systems has been widely used in the field of aerospace, shipping and so on. Then in the Networked Control Systems, data transmission is the most important part of the network, and during this process, because of time delaying and information packet lost, Networked Control Systems becomes more complex, so scholars have more interest in it. So, we study Networked Control Systems can make us more clearly about it in theory, it also plays an important role in actual control.First, in this paper, I study the problem of information packet lost and stability in generalized network control system with long time delay. We assume that there is a certain loss incidence, we can model a asynchronous dynamical system that two events occur, then we use the theory on it to obtain the sufficient conditions of the stability of the system. The simulation example proves its feasibility.Next, I study the problem of robust H infinity problem for networked control systems with long time delay. Assuming the sensors are clock-driver, controllers and actuators are event-driver, we make more than one sampling period and external disturbance of the limited energy, for this networked control system with uncertain long time-delay,we can establish a control constraint, a long time-delay uncertain networked control system model is established. Then I create a suitable Lyapunov function. According to the condition of the stability of the Lyapunov function and linear matrix inequalities, we work out the sufficient conditions of the asymptotically stable and H infinity performance for networked control system. A simulation example shows the effectiveness and accuracy of the method.Then I study the problem of robust H infinity problem for generalized networked control systems with long time delay. Assuming the sensors are clock-driver, controllers and actuators are event-driver, in more than one sampling period and limited energy of the external disturbance. Using the augmented state to establish uncertain system model of discrete time-varying and using Lyapunov function and using linear matrix inequalities,we work out the sufficient conditions for dynamic output H infinity feedback control. Finally, A simulation example shows the effectiveness of the method.