ABSTRACT

The two main issues with any wireless networked control system are delay and packet dropout. Both issues are interrelated, and they can affect networked control performance severely. In order to counter their negative effect on the control performance of a networked control system, the potential approaches to address them using techniques such as the Smith predictor and the Kalman filter. From a Wireless highway addressable remote transducer networked control system perspective, with the help of cyclic redundant check, a wireless message delivered to a process plant will be checked to ensure its integrity before the control or feedback signal is used. The controllers were tuned by using the integral of time multiplied absolute error and squared controller output for addressing randomly time-varying delay issue in networked control systems. A fuzzy logic system was designed for adjusting virtual resistances of droop controllers in a low voltage DC micro-grid.