Performance Analysis Of Networked Control System Via Simulation And The Optimization Of Sampling Period

Controlling, computer and network communication are the most popular research and application field in the world, while the combination of all three is a challenging research topic. Networked Control System (Networked Control System, NCS) is the achievement of the three kinds of technology. Not only has NCS brought controlling to a new field, but also it is quickly applied in industrial production.The network control system is mainly divided into two parts, controlling and network. The control measures of dynamic and static characteristics of system, and network measures of service quality of system, such as designing controllers, scheduling, the collaborative of designing control and network, optimization of the sample rate, induce delay, packet loss, etc. Generally speaking, the method of study NCS is to collaborate control and network by classic control theory. This paper is also according to the principle. It is mainly using relaxed MATLAB toolbox to study the controller design problem and optimization sample rate, finally, the simulation result show that NCS is feasible.This paper firstly introduces the network control system of common research problems, for example, the controller design, scheduling, collaboration with control and network, optimization of the sample period, packet loss, etc. They influence performance of network control system. So, understanding and solving these problems is the key to guarantee the performance of network control system.Then, in view of the network control system's problems mentioned above, the author focuses on the controller design problem. According to classical control theory, there is a relationship between root locus and control quality of the control system. Based on the ralationship, the author gives a method to design a controller, and the simulation result shows that the controller is completely satisfied with the requirement of NCS.Finally, referring to scheduling, collaboration of control and network, optimizing sample rate of the network control system, there gives resolution which realizes optimizing sample and achieves optimal performance in NCS.The innovation of the paper is optimzation sample rate both considering control and network restraints, in conclusion lastly the simulation result verifies that the sample rate is optimal and the performance of NCS also meets the requriement.