Analysis of Photoelectric Tracking Servo Control System Designing and Its Proportional Integral Derivative Parameters Tuning Methods

摘要

Photoelectric tracking servo control system is composed of photoelectric signal detection, signal processing, servo control system, and mechanical structure, which plays an important role in the field of target tracking. In this study, the single-axis servo control system is selected as the research object, and the overall scheme of the system is designed. The three-phase permanent magnet synchronous motor is taken as the actuator. The overall hardware structure of the system is designed through the scheduling strategy of space voltage vector, including the main control circuit, peripheral extension module circuit, and power drive module circuit. The software design of the main program and subroutine of the servo control system is carried out, and the self-tuning issue of parameters of the photoelectric tracking servo control system is studied. In view of the shortcomings of traditional controllers, the self-tuning method of speed loop fuzzy proportional integral (PI) is proposed and simulated by MatLab/Simulink. During the test, the rotor speed of motor becomes stable at 86 ms when the speed is set to 1800 r/min, and the rotor speed increases rapidly and has a short period of overshoot. After entering the stationary period, the speed ripple becomes smaller. The motor is in the braking state when the speed drops to 0 r/min, and the current fluctuation amplitude is large in a short time, then drops to 0 rapidly. In the comparison of different parameter setting methods, it is found that using fuzzy PI parameter self-tuning can reduce its overshooting, shorten the adjustment time, and is with strong anti-interference ability. Based on the above research, the effectiveness of the design of the photoelectric tracking servo control system is demonstrated, and the performance of parameter self-integration is favorable, which further promotes the development of this kind of servo control system.