The study of DMC-PID algorithm in the application of photoelectric tracking system

Comparing with typical closed loop PID control strategy, dynamic matrix control (DMC) strategy performs well in tracking system and could also be directly applied to plant model with time-delay, however its ability of anti-interference is much weaker than typical PID control strategy. In this paper, DMC-PID cascade control strategy is proposed combined with the advantages of these two algorithms and was simulated in a uniaxial DC servo system in order to shorten the time-delay and enhance the stability of the system. The simulated results show that this double control strategy does much better than typical PID algorithm especially in tracking property, accuracy, robustness.