Design of drive control for digital transmission relay antenna based on FPGA miniaturization

Abstract

In order to meet the requirements of spacecraft miniaturization design, a single chip anti-fuse FPGA is used as main control chip for driving relay antenna. In order to meet the high precision requirements of antenna pointing, dual-channel rotary transformer with AD2S80 decoding is used to obtain position information data. In order to improve the speed stability of the mechanism, the stepper motor 256 subdivision sinusoidal PWM drive mode is adopted. Communication, position, current acquisition, fault error mechanism and stepper motor drive function are set in one, drive machine weight is reduced from 5~6 kg to 2.5 kg, and pointing accuracy increases to 5.5 degrees per thousand. The experimental results show that the drive control of digital relay antenna based on single chip FPGA can effectively improve the integration of machine and the smoothness of motion process, and also has great significance and application value to the improvement of satellite comprehensive performance.

Keywords

• relay antenna
• dual-channel rotary transformers
• subdivision drives
• FPGA