Research On Robust Predictive Control Of Networked System With Bounded Packet Loss Under Communication Protocol

The advantages of networked systems are shared communication networks,flexible operation,and low cost.At the same time,there are many problems,such as delay,packet loss,and quantization.At present,a lot of research results have been achieved on the above issues,and the study of network control problems under specific communication protocols is still of great significance.Due to data communication through shared networks,network congestion and data coverage in networked systems,packet loss problems are widespread.The study of network control systems for packet loss has attracted the interest of scholars.In the existing research,the robust predictive control method obtains a more conservative stability result under the premise of the upper bound of packet loss.This paper combines two communication protocols(sensor-controller side)to study the problem of robust predictive control under specific protocols.The main research work is as follows:(1)Combined with related communication protocols,build a robust optimization problem with arbitrary bounded packet loss multicellular uncertain system.When considering the performance objective function in the infinite time domain,only focus on the successfully transmitted data sequence,and then based on this,two robust predictive control strategies are proposed,which directly parameterize the infinite time domain control action into a state feedback control law,or parameterized as a free control function,and then followed by a state feedback control law.(2)In the sensor-controller network communication link,the robust MPC problem based on the redundant channel protocol is discussed.Under the redundant channel protocol,a redundant communication channel is set up on the sensor side to reduce the probability of packet loss in the data,the attractive area of the network control system increases,and the feasibility of robust MPC is improved.At the same time,in order to achieve a balance between system reliability and complexity,a choice of redundant channel numbers is given.(3)Introduce the more widely used Round-Robin(RR)protocol in the actual industry into the sensor-controller network communication link.The RR protocol distributes the network's use rights evenly to all network nodes through a preset "token" ring.Based on the scheduling rules of the protocol,a system control model is established through dimension expansion,and the corresponding state components in the state are updated at the moment of packet loss.And build robust predictive control problem with this,and get the stability LMI condition.