一种用于星载SAR天线的转动控制技术

针对星载合成孔径雷达（SAR）天线要求在超低转速下平稳转动，同时满足小型化轻量化的要求，本文提出一种基于微步距模式的天线转动控制技术，该技术使用两个带PWM电路的全桥驱动器通过微步距方式驱动步进电机。在给出系统架构、微步距控制原理后，进一步提出可靠性设计的具体措施。经测试和环境试验验证，该技术对同类应用具有一定的参考价值。

Rotation Control Technique Applied to Satellite-borne SAR Antenna

In order to achieve an ultra-smooth motion profile under ultra-low speed condition for SAR Antenna and to meet the requirements for miniaturization, a rotation control technique for the Antenna Rotation, which uses two complete H-Bridge hybrid with internal PWM circuitry to drive a mixed stepper motor through microstep mode, is presented in this paper. Based on the detailed introduction of the system architecture and the microstepping control principle, the concrete measures of reliability design are also given. After test and environmental verification, it has certain reference value for the similar application.