网络控制系统的随机状态反馈控制

Stochastic State Feedback Control of Networked Control Systems

通过网络形成闭环的反馈控制系统称为网络控制系统 ,其特征是系统各组件之间可以通过网络交换信息。基于线性时不变被控对象的网络控制系统的离散随机模型 ,讨论了网络控制系统在两种离散性能指标下系统的随机最优状态反馈控制器的设计 ,定义了网络控制系统的随机稳定性、均方稳定性和均方指数稳定性 ,并证明了这两种最优控制器均可使网络控制系统均方指数稳定。最后 ,以网络控制下的釜式反应器为对象进行了仿真研究 。

Feedback control systems wherein the control loops are closed through a real-time network are called networked control systems. The feature of an NCS is that information is exchanged using a network among control system components. Based on the discrete stochastic model of networked control systems whose controlled object is linear time-invariant system, this paper presents the design of stochastic optimal controllers of networked control systems with state feedback for two kinds of discrete performance index. Stochastically stability, mean square stability and exponentially mean square stability of networked control systems are defined in this paper. The paper proves that two optimal controllers can all render networked control systems exponentially mean square stable. In the end the simulation based on the networked controlled batch reactor is studied. Simulational results show that the proposed methods are right and effective.