The multi-step predicting controllers for deterministic networked control systems

As network-induced delay is a stochastic variable, networked control systems are stochastic systems. For this kind of stochastic system, one can design its stochastic controllers when network-induced delay has a known probability distribution function, otherwise one can only design its deterministic controllers. On some assumptions, the method of placing a specific amount of buffer at source node and object node of the systems was used to transform stochastic time delay to deterministic time delay. The systems with stochastic delay were transformed to a deterministic one. Based on linear time-invariation controlled object, multi-step predicting controllers of the systems were designed, which makes the closed loop system stabilizable and satisfies the separation principle with the observer. The simulation based on the unstable inverted pendulum was performed. The simulated results show that the proposed method is effective.