Research on Auto Compensation of High Temperature Verification Furnace Based on Model Reference Adaptive Control

Because of the considerable change of surrounding temperature caused by the relatively long time in heating, it is rather difficult to stabilize the furnace temperature, when verifying thermocouples in auto-verification furnace at high temperature, in that case changes of the parameters of the furnace temperature mode occur, which results in worsened effects on the controller. In order to adapt the time changing of the furnace brought by the change of surrounding temperature, the PID controller parameter is adjusted on line by using of model reference self adaptive control method. It´s proved fine adaptively by experiments result, thereby it afford a new method for temperature control of thermocouple automatic verification furnace.