Method of controlling the processes of automatic turning-on-and-off and temperature decreasing for air refrigeration turbine

The structure and the performance characters of the control system of the air refrigeration compressor-turbine are introduced. Due to the difficulties, including easy damage caused by improper operation, poor anti-interference ability, and easily overshooting, the control system is not easy to control in classical PID methods. This problem can be solved by controlling the turbine revolution speed using the fuzzy-PID method of combining the fuzzy control method with the expert PID control method. The experimental results showed that the fuzzy-PID control method has not only high accuracy as in the PID controller, but also rapidity, stability and high robustness as in the fuzzy controller. Moreover, the proposed method is also suitable for application in the control system of the air refrigeration compressor -turbine.