Performance Analysis Of Information Delay Systems Under Multiple Communication Constraints

With the rapid development of computer and communication technology,human society has stepped into the information age.Scholars begin to study how to apply the network to the control system.Information time-delay system comes into being under this background.Compared with traditional systems,information time-delay systems have many advantages,such as convenient installation,high maintainability,easy to expand and so on.However,along with opportunities,information time-delay systems also encounter many new challenges.On the one hand,due to the introduction of the network,the system performance will be affected by its own inherent properties,such as time delay,unstable poles and non-minimum phase zero.And the influence of communication factors,such as: Gaussian white noise,packet loss,bandwidth limit,quantization noise,etc.On the other hand,with the continuous breakthrough of technology,the system will also face some human factors interference,such as cyber-attack.In order to deal with network attacks,the information time-delay system has to join the intrusion detection system,and what impact the intrusion detection system will have on the system performance is also a problem that needs to be studied.In addition,with the development of system architecture,distributed architecture is gradually applied to information time-delay systems.In order to ensure the accuracy and consistency of information in asynchronous processing,the message queue technology is added,and its impact on the system performance must be considered.Based on the above problems,the research content of this paper is as follows:The performance limitation of multi-input multi-output information time-delay system with packet loss and the forward and the feedback channel have Gaussian white noise is studied.By using spectral decomposition,Youla parameterization,coprime decomposition and inner-outer factorization,the performance expressions of information time-delay systems are obtained.The results show that the system performance is not only affected by the inherent properties of the system,but also by the communication parameters.The performance limitation problem of the information time-delay system under the cyber-attack of incomplete information is studied,and the interference factors such as bandwidth constraint and Gaussian white noise are considered.The performance expressions of information time-delay systems are obtained by game theory,coqualitative decomposition,inner-outer factorization,partial factorization and so on.The results show that the system performance is affected by the inherent properties of the system and communication parameters.In addition,the results also show that the performance of the system is only affected by the payoff matrix of the intrusion detection system,and has nothing to do with the payoff matrix of the attacker.The performance limitation of the information time-delay system with packet loss,Gaussian white noise,bandwidth constraints and message queues are studied.By means of queuing theory,inner-outer factorization,partial factorization and so on,the performance expressions of information time-delay systems are obtained.The results show that the system performance is not only affected by the inherent properties of the system and communication parameters,but also varies greatly under different queuing rules.