Simulation of fuzzy self-tuning PID control in AHU system

Based on the Matlab/Simulink， simulates air handle units (AHU) commonly  used in central air conditioning system, and develops a fuzzy self-tuning PID control system. By comparing fuzzy-PID control and conventional PID control， finds that the former control has higher precision, smaller overshoot, and the method has favorable adaptability, robustness and disturbance-rejection especially when the parameters of the object are changed, and can effectively control the air conditioning system which is nonlinear, frequently variable and time-delaying.