关键词: 网络控制系统, 随机时延, 状态观测器, 最优控制

Abstract: This paper investigates modeling and analysis of networked control systems subject to random time delays and system noise.In view of the system existence random time delays，we design state observers separately under the full condition feedback system and the output feedback system to realize the time delays compensation，thus we can obtain the more accurate forecast estimate.Meanwhile，we present the optimal control law of the networked control system based on LQG performance，to weaken the influence of time delays and system noise on system stability，so we can ensure the stability of the system.Finally，by the example simulation，we confirm the validity of the time delay compensation strategy and the optimum control design.

Key words: networked control system, random time delays, state observer, optimum control