Two-axis turn table servo control system based on DSP

ZHENG Yan-wen， WANG Tong-yu， LIN Lin， HUANG Yu-xin， FAN Gen-xin
（School of Mechanical and Electrical Engineering， Changchun University of Science and Technology，
Changchun 130022， China）

Abstract： Aiming at the problems of complex arrangements and difficult maintenance of network cable in the present network communication，two-axis turntable servo control technology was applied in network communication. The hardware and software of the servo control system were designed. The double closed loop control method of "position and speed" was adopted and the servo control card of the system was designed with "TMS320F2812 and CPLD" as the core. Highly integrated motor driving chip SA57 was used to design the power driving card. The lead-lag control algorithm was adopted，C and C++ were applied to design software program for the control system. The mathematical model of the servo control system of turntable pitching axis was established. Advanced lead-lag controller was used to compensate the speed and position loop of the system. The system mathematical model of the two loops was numerically simulated and analyzed in the Simulink module of Matlab. The research results indicate that the response time of the designed two-axis turntable servo control system is 25 ms，and the position tracking precision is within ±1″. The tracking performance of the system completely meets the technical requirements.
Key words： two-axis turn table servo control； TMS320F2812； complex programmable logic device（CPLD）； lead-lag countroller ；DSP