Fuzzy Immune Self-Regulating PID Control of Networked Control System

Network-induced time delay is the main factor that deteriorates the performance of networked control system (NCS). In order to effectively restrain the impact of network delay on NCS, a fuzzy immune self- regulating PID control scheme is proposed. With ideas from the biological immune system, fuzzy immune PID control strategy is applied to NCS, in which parameter P is adaptively modulated by means of fuzzy immune algorithm, parameters I and D are dynamically regulated by fuzzy logic scheme. Simulation on network-based controlled DC motor is carried out so as to evaluate application of the presented control scheme in NCS. The result of simulation experiment shows validity of the control scheme and improvement in dynamic performance and robustness of NCS.