Optimal control method of multi-channel communication control system

Abstract

The invention provides an optimal control method of a multi-channel communication control system, relating to a control method of a network control system. The method comprises the steps of packet wrong sequence modeling based on multi-channel communication, network control system modeling which ensures the execution of a newest signal, random system modeling based on a Markovian jump characteristic, and a real-time online controller design based on an adaptive way. According to the method, for a packet wrong sequence phenomenon existing in the multi-channel communication control system, a packet offset value is defined; then a signal switching random channel matrix is defined, modeling is carried out on NCSs to be Markovian jump systems which execute a newest signal; based on the Markov theory and combined with the LMI technology, for uncertain and certain multiple channel communication NCSs, a real-time adaptive controller is designed, and an obtained closed-loop system secondary performance index does not excess a specified upper bound. According to the method, the influence of a wrong sequence on network and control system performance is effectively eliminated, and the method is convenient, efficient, and feasible.

Description

technical field [0001] The invention relates to a control method of a network control system, in particular to an optimal control method of a multi-channel communication control system. Background technique [0002] With the wide application of computer technology and control technology in the industrial field, the network control system is increasingly required in the field of actual industrial control, telemedicine, and smart grid. Due to network and multi-channel sharing, it is impossible for all sampled data to reach the controller and actuator at the same time, and, data packet loss, data packet out-of-order and other irrational factors are always inevitable, which will seriously reduce the control performance of the system . Compared with single-input single-output (SISO) NCSs, the analysis and design of multiple-input multiple-output (MIMO) NCSs becomes more complicated. However, due to the network or system requirements of the actual control system, compare...

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Problems solved by technology

(1) Some documents consider transmission delay and packet loss, but do not discuss controller design

(2) Considering the different driving methods of sensors, controllers and actuators, the LQR controller design scheme of MIMO NCSs is studied, but the network transmission delay is assumed to be fixed or less than one sampling period, or the problem of packet loss is ignored

However, it should be pointed out that the above literature only considers the impact of network transmission delay and packet loss on the performance of NCSs, ignoring the existence of out-of-sequence

Since out-of-sequence inevitably exists in network communication, and the existence of out-of-order affects the network performance and control performance of NCSs, it is obvious that it is difficult to stabilize the system by ignoring the out-of-order controller design, and even in the practical application of NCSs May destabilize the system

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