Abstract
In the research on the networked control systems (NCS) the performance of the control system is assumed to be affected by network-induced parameters such as delays, jitters, packet losses, and link failures. In this chapter, a reconfiguration of the network control is presented. The switched Ethernet network is used as an example of the NCS network. First, a procedure for obtaining the upper bound delay of the transmission time of a packet in the switched Ethernet network is presented. The upper bound delay is monitored and the increase of the value reflects a modification of the network parameters due to a fault. Next, the increase is detected and the control loop is reconfigured when a predesigned controller that is able to compensate the fault is switched on. Two compensation strategies—the Smith predictor based compensation strategy and the robust control based compensation strategy—are applied and compared.
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