Photoelectric Tracking Servo Control System and Its Data Mining Adoption

Abstract

Photoelectric tracking control system is a system 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 the design process, the overall design scheme of the system is firstly proposed. In the photoelectric signal detection part, a conversion device for mercury thermometer in non-electric environment is designed. The temperature scale on traditional mercury thermometer is converted into light intensity by optical method, optical signal is transmitted by optical fiber, and data processing is realized by single chip microcomputer. Giving that the influence of optical path disturbance on the temperature measurement accuracy of photoelectric conversion device, the dual optical path compensation method is adopted to overcome the possible optical path disturbance in the device. At the same time, the other hardware structure of the control system is also designed, including the main control circuit and peripheral expansion module circuit. In view of PID control can’t solve the contradiction between tracking accuracy and speed, data mining technology is used to improve it. In the experiment, the photoelectric signal detection device is firstly tested. Model 202-O electric thermostat and CENTER300 thermocouple thermometer are selected. The electric thermostat is used to change the temperature, and the thermocouple thermometer records the temperature change. The results show that the device has good performance in the whole temperature measurement range, and the temperature fluctuation is between [±0.08 °C,±0.26 °C], which basically meets the accuracy requirements of the device. When the control system electrode is set at 2,000 rpm, the startup and braking operation shows that the system can enter steady state in a short time. The introduction of data mining technology can reduce the regulation time of the system and reduce the interference of overshoot to the normal operation of the system.