Fuzzy immune self-tuning PID control of HVAC system

Aiming at the non-linear links such as time lag, large inertia, in the heating, ventilating, and air conditioning (HVAC) system, a fuzzy immune self-tuning PID control system is designed. With ideas from the biological immune system, fuzzy immune PID control strategy is applied to central air-conditioning system, in which the proportional coefficient of PID is adaptively modulated by means of fuzzy immune algorithm, and integral coefficient and differential coefficient are dynamically regulated by fuzzy logic scheme. Based on the model of central air-conditioning room, the simulation investigation has been carried out and the result shows validity of the control scheme and improvement in dynamic performance and robustness of central air-conditioning control system.