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Analysis on Temperature Control of Tubular Furnace Based on Fuzzy Control

By analyzing of the tube-type heating furnace features and process, the temperature heating of the furnace was unidirectional, large inertia, heavy lag and changeable, it is hard to build an exact mathematical model confirmed parameters. Applying traditional control theory and method is difficult to achieve perfect control effect. We studied the application of the fuzzy control in tubular furnace temperature control. Then according to the dynamic response process of the second order system, fuzzy control rule table is established. The input and output relationship of fuzzy control rule table is introduced applying of synthesis reasoning rules, so as to calculate the fuzzy output vector corresponding to the deviation and the deviation change rate, and then fuzzy judged by using the center of gravity method, finally the adjustment amount of time interval for push rod is obtained. The feeding time of push-off arm was adjusted to control the heat-up time of each blank in the tubular heater dynamically, and ensures it reach the set temperature when coming out of the tubular furnace. This paper, finally, analyzes the factors that influence the system error and processes them adopting error analysis method, so as to improve the control precision of system. Copyright © 2013 IFSA.