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H-infinity quantized control based on event-trigger for networked control systems

A co-design scheme of observer, event-triggered generator and H∞ controller for networked control systems (NCSs) with limited network resource and unobserved state variables is proposed in this paper. The event-triggered generator is based on the latest quantized variables and the current state, which not only reduce the amount of communication between sensor and controller, but also reduce the effect of quantization on system performance. Firstly, the NCSs are modeled as linear time-invariant systems with bounded disturbances. Secondly, based on Lyapunov stability theory, the co-design of observer parameters, event-triggered threshold and controller parameters that guarantee the system asymptotically stable and H∞ performance is provided. Finally, a simulation example is given to illustrate the effective of proposed method.