State estimation and stabilisation of nonlinear networked control systems with mixed time-delay

ABSTRACT In this paper, the problems of time-delay, packet loss and quantisation for network control with global Lipschitz nonlinearity are investigated. The packet losses between the forward and backward channels are considered, and two independent Bernoulli distributions are modelled respectively. An appropriate compensation strategy is proposed to reduce the buffeting and response time of the system. A controller based on differential proportional observer is proposed. The information of estimation errors is used to optimise state estimations. Finally, a simulation example illustrates the feasibility of the method, and the comparisons with existing discrete time-delay system and distributed time-delay system prove the superiority of the method.