A Networked Control System With Stochastically Varying Transmission Delay and Uncertain Process Parameters

Approach to the design of robust networked control systems

“…One of the mechanisms proposed recently 2007;Yang et al, 2005) is the method of prediction described shortly in what follows.…”

“…If a computer network is used to exchange information between the local computer and the remote controller, then some transmission delays are introduced into the feedback loop. We distinguish two transmission delays: the sensor to controller delay τ sc and the controller to actuator delay τ ca , and we assume that there exist nonnegative integers (Liu, Xia and Rees, 2005;Liu et al, 2007;Yang et al, 2005) n sc and n ca such that the total transmission delay τ sa = τ sc + τ ca satisfies the inequality…”

“…Hence, the compensation of the influence network introduced delays is critical for proper operation of an NCS with an MLS. Taking into account results concerning network introduced delays and requirements regarding the choice of the sampling period for digital control of the MLS, we have concluded that the statistical approach to the design of network based controllers for the MLS is less useful than the predictive control approach described by 2007) and Yang et al (2005).…”

“…Namely, we applied a recently developed approach based on state prediction of the discrete-time linear model of the control plant 2007;Yang et al, 2005). This approach belongs to the class of methods exploiting a deterministic mathematical model of the plant.…”

Co-simulation of wireless networked control systems over mobile ad hoc network using SIMULINK and OPNET

“…The WNCS task invocation model of this paper applies clock-driven sampling. Control and actuation tasks are invoked when an event occurs, for instance, when it receives an information packet from another node through the network [5], [10]. Clock-driven sampling and an eventdriven control-actuation approach has several advantages.…”