The Temperature Control of Blackbody Radiation Source Based on IMC-PID

With the rapid development of radiation temperature measurement technology in recent decades, blackbody radiation source plays an increasingly important role in the field of temperature measurement. A large number of experimental data show that not only it has the characteristic of typical nonlinearity, but also the system has time delay and large inertia in the process of heating and cooling. In industry, most blackbody radiation source temperature control adopts traditional PID control method, but because of its large overshoot and long adjustment time, the temperature control efficiency is greatly reduced. In this paper, IMC-PID is introduced to improve the dynamic performance of blackbody radiation source. Firstly, both the internal working principle of blackbody radiation source and the establishment process of its internal mathematical model are described. Then the control principle and method of IMCPID is established in this system. Finally, MATLAB/SIMULINK platform is used to compare the conventional PID algorithm with IMC-PID algorithm. The simulation results show that IMC-PID shortens plant stable times and it is without overshoot. what's more, the results also indicated that the control method of IMC-PID improves the dynamic performance of the system and has a strong prospect for practical application.