关键词: 永磁同步电机, 航天, 高精度, 指向机构

Abstract: In response to the problem of low servo performance in traditional pointing mechanism products driven by stepper motors and reducers, the execution unit in the new generation of pointing mechanism products is upgraded to permanent magnet synchronous direct drive mode. On the basis of position and speed command interfaces, a tracking deviation command interface is added to achieve a closed-loop control architecture for the large system, and a suitable
tracking deviation correction algorithm is designed. Through system level experimental verification, pointing mechanism products with permanent magnet synchronous direct drive mode can meet the servo performance requirements of payloads such as laser communication and high-resolution remote sensing cameras for motion platforms.

Key words: permanent magnet synchronous motor( PMSM), aerospace, high-precision, pointing mechanism