Event-triggered Dynamic Output Feedback Control For Networked Systems With Regional Pole Constraint

Networked Control Systems(NCSs)have a high degree of application in production and life.While it is widely used,it also has some disadvantages that cannot be ignored.How to avoid the congestion of communication channel and the waste of network resources are the key areas of scholars' research.The stability of networked systems is still a necessary condition for normal operation.For achieving this goal,in this paper,the event-triggered dynamic output feedback H? control of the linear and nonlinear networked systems is studied.The system response speed can be improved by pole constraint.There are few articles on pole constraint in NCSs,and fewer articles on the joint study of pole constraint and event triggering,that the research motivation of this paper is aroused.The main research contents are as follows:For the linear networked system,a dynamic output feedback controller(DOFC)with regional pole constraint is designed with the event-triggered mechanism.Firstly,by giving the event-triggered condition.And then by using the data brought by the event-triggered mechanism to establish the DOFC.Secondly,by using variable substitution,the ?-stability constraint is introduced.The condition for the asymptotic stability of the closed-loop system is proposed by using Schur Complement Lemma,Young Inequality and Jensen Inequality.From variable substitution,when the transformed system is asymptotically stable,the original system before the regional pole constraint is ?-stable.Then,an anti-interference H? controller is designed,the proposed sufficient condition is decoupled,and the suitable linear matrix inequality(LMI)is obtained.Finally,the proposed conclusion is verified by an example,and the H? performance index is optimized.For the nonlinear networked system,a DOFC with regional pole constraint is designed with the event-triggered mechanism.Firstly,the nonlinear networked system is modeled as a T-S fuzzy model,the fuzzy If-Then rules followed by the system are given,the local relationship is described,and the local fuzzy model is established.The global fuzzy model is obtained by single point fuzzification,central product reasoning and central clarity of the local model.Then,the event-triggered mechanism is introduced to the global fuzzy model.Design DOFC and add the?-stable regional pole constraint,then the transformed closed-loop system is obtained.Secondly,the parameters of controllers of closed-loop systems are designed,and the sufficient condition that making the closed-loop system asymptotic stable is proposed.The splitting method and transformation method is used to decouple the LMI,and the parameters of controllers are obtained.Finally,the proposed conclusion is verified by an example.The feasibility of the theory proposed in this paper is measured and verified by a satellite attitude networked system.Through the kinetic analysis of satellite attitude system,the kinetic equation is established,transformed into state equation,and the system parameter matrices are obtained.The system is going to apply the theory proposed in this paper,a DOFC is designed to make the closed-loop system asymptotically stable,and the influence of different regional pole constraint on the system is discussed to verify the effect of event-triggered dynamic output feedback control of network system under regional pole constraint in the application of the satellite system.