Performance Analysis of MIMO Network Control System With Limited Capacity Queue System Under Packet Loss

ABSTRACT This article investigates the effects of various network factors and queuing systems on the performance of network control systems (NCSs). Specifically, the performa nce limitati ons of systems with white Gaussian noise (WGN) in the forward and feedback channels, as well as with packet loss and queuing systems in the feedback channels was studied. In this investigation, queuing theory was used to analyze the influence of queuing systems on the performance of NCSs when the system capacity is limited. We obtain the performance expression of NCSs by internal and external factorization, partial factorization, and spectrum decomposition methods. The results reveal that the system performance is affected not only by inherent characteristics of the system such as unstable zeros, nonminimum phase (NMP) zeros with their directions, and time delay but also by network factors such as packet loss and WGN. Finally, several simulations were presented to verify the theoretical results.