Application of fuzzy PID control system for heating curves of crystallization axe

LIANG Xin
（Tianjin DAMF Automation Technology Co.，Ltd.， Tianjin 300112，China）

Abstract：  The control of the heating curve of crystallization axe which is the key equipment of the catalyst production device is beyond the performance of the usual PID Aiming at keeping up the heating curve with the theoretical curve strictly which is critical to the quality of the final production， a new control strategy  of fuzzy PID control method was presented  to control the heating curve Based on analysis of the characteristics and elements of the heating system， the two input and one output fuzzy module which the temperature value and rate of temperature were used as inputs and the opening value of controlled silicon was used as output， was adopted as well as to keep the temperature stability in the constant phase of the heating curve， the standard PID module was also adopted. The reasoning principles were also studied Conbined with parameter list and standard temperrature control function block in PID，the control strategy  based on the Siemens SIMATIC PCS7 was introduced in the followingThe practical applications results indicate that the error between the heating curve and the theoretical curve could be reduced to within 05 percents by this strategy
Key words： crystallization axe; heating curve; fuzzy control; proportion integral derivative（PID）;  PCS7