In networked control systems (NCS), sensing and control signals between the plant and controllers are typically transmitted wirelessly. Thus, the time delay plays an important role for the stability of NCS, especially with distributed controllers. In this paper, the optimal control strategy is derived for distributed control networks with time delays. In particular, we form the optimal control ...

This chapter discusses properties of feedback control systems containing loop delays (dead-time systems) and approaches to controller design for such systems. Consider the feedback system depicted in Fig. 1, where P is a plant, C is a controller, r is a reference signal, d is a disturbance, u is a control signal, and y is an output (measurement) signal. It is assumed throughout that both the me...