Investigation on Temperature and Humidity Control Fuzzy Self-Tuning PID Method
Because the cold storage refrigeration system has a the characteristics of large time delay, inertia and parameter variety , and conventional PID control can not realize the temperature and humidity coupling control, PID-fuzzy algorithms were developed and compared to conventional PID controllers, proving to be more suitable and reliable for a refrigerator used to foster needle mushroom. The thesis introduced the basic principle of the fuzzy control and present in detail the way to design Fuzzy Controller for temperature and humidity coupling control in Cold Storage refrigeration system .According to the simulate testing the cold storage refrigeration system with the SIMULINK of MATLAB, the control quality of the system and the ability of anti – jamming would have a great improvement and enhancement. When the PID-fuzzy algorithms were written in the PLC, the practical results show that this system has better stability, accuracy and quality of control.
J. Liu et al., "Investigation on Temperature and Humidity Control Fuzzy Self-Tuning PID Method", Advanced Materials Research, Vols. 271-273, pp. 1741-1746, 2011