Controller Design And Simulation Research Of Networked Control Systems

Along with the extension of the control system scale and fast development of computer-controlled and computer networks technology, control systems based on control networks are widely applied in the modern industry control. Feedback control systems wherein the control loops are closed through a real-time network are called networked control systems (NCS). NCS essentially comprises multiple nodes communicating with each other over communication networks. However, the problem that uncertain data transmission may degrade the performance of control system and it may even destabilize the system is desiderated to be researched and be resolved. In this paper, we focus on linear time-invariant normal controlled plant. The main problems of network induced delay and disturbance are considered. Main achievements are as follows:1. The detail summary of some basic contents, issues, and recent research on networked control systems is made.2. For linear time-invariant normal controlled plant, under the assumption that the sensor nodes are clock-driven, controller nodes and actuator nodes are event-driven and network induced delay is uncertain, it is less than or equals to a sampling period. Base on the Lyapunov approach and linear matrix inequality description, we study the problems of robust stabilization, robust control law design, performance guaranteed optimal control, H_∞ optimal control with noise disturbance for dynamic output feedback NCS, the H_∞ state observer design with uncertain delay and robust stability of NCS based on state observer. The dynamic output feedback NCS is modeled as a discrete time-variant system with uncertainty. The condition of robust stability and the design method of robust control law, performance guaranteed optimal control law and H_∞ optimal control law for dynamic output feedback NCS are presented respectively. The design method of H_∞ state observers and the condition of robust stability of NCS based on state observer are presented.3. By means of real-time simulator TrueTime, A real-time simulation system of...