Study on fuzzy self-tuning PID cascade control algorithm for temperature of Active Solar House Heating System

Aiming at the control to temperature of Active Solar House Heating System, which has large time-delay, time-varying and model uncertainty. Fuzzy Self-tuning PID Cascade Control algorithm is prevailed. It takes the advantage of cascade control algorithm to overcome dynamic characteristics of controlled parameter, a self-tuning PID control for achieving perfect control effect. The simulation shows that the algorithm is better than the conventional PID cascade control, it has better adaptabilities for the parameters´ variation, lower overshoot and better anti-interference ability.