Research On Tracking Control Of Networked Control System Based On Event-triggering Mechanism

In the past few years,tracking control has already been a very important direction in the field of control system.Therefore,the tracking control which has been widely applied in missile guidance,robot trajectory and economic etc,bio-medical.In order to make the signal of the controlled object follow the signal of the reference model as closely as possible.On the other hand,in order to improve the utilization of bandwidth in network control system,an event-triggered mechanism is introduced in network control system.Event-triggered control,different from traditional periodic sampling control,is a non-periodic control strategy.only when the triggering condition is satisfied,the current sample signal will be transmitted,which achieving on-demand distribution and effectively reducing the waste of resources under the guarantee of system control performance.According to the above analysis,this paper,on the basis of the related subject background and the existing research results,has completed the following contents:(1)The problem of output tracking control for a linear network control system with the event-triggering mechanism is studied.Firstly,a new event-triggering mechanism is proposed.Then considering the influence of event-triggering conditions and time-varying transmission delay.a tracking system model is established.The stability of the system model is analyzed by using Lyapunov functional approach together with linear matrix inequality technique.The expected tracking controller can be designed.(2)The problem of tracking control for a nonlinear network control system based on T-S(Takagi-Sugeno)fuzzy model with an adaptive event-triggering mechanism is studied.Considering the influence of adaptive triggering conditions and time-varying transmission delay,the tracking problem is translated into the feasibility of solving linear matrix inequalities by using Lyapunov stability theory and linear matrix inequality analysis method.The parameters of tracking controller can be derived by solving the linear matrix inequality.(3)Considering the influence of DoS jamming attack and time-varying transmission delay,the tracking control problem of nonlinear networked control system in view of T-S fuzzy model is studied and a new event-triggering mechanism is proposed.By using the analysis method of time-delay system,sufficient conditions for exponential stability of a closed-loop system are obtained.According to this condition,a joint design method of tracking controller feedback gain and event triggering parameters is given.