Design of Drive Controller for Spaceborne Microwave Radar

2021 33rd Chinese Control and Decision Conference (CCDC) Pub Date : 2021-05-22 DOI:10.1109/CCDC52312.2021.9602824

Wang Youbo, Wu Pengfei, Fang Zhenfeng, Zhao Wanliang, Zu Fengdan

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Abstract

In order to realize the control of spaceborne microwave radar with high accuracy, long service term and high reliability, this paper designed a driving controller for direct driven permanent magnet synchronous motor(PMSM) based on aerospace-level anti-fuse FPGA. The mathematical model of the structure of microwave radar is built, and the frequency response characteristics of each ring are analyzed. The least squares method is adopted for calculating the speed, which has increased the accuracy in calculating the speed. The vector control on the PMSM is realized by combining the location information collected by the dual-channel rotary transformer and the current signal collected by AD sensor. Based on the space vector pulse width modulation (SVPWM) strategy, a circular rotating field is acquired, which can increase the controlling performance. The designed airspace searching strategy can realize flexible autonomous switching between dual closed-loop and triple closed-loop controlling. The experiment results indicate that this design can control the PMSM accurately and steadily, enabling the location tracking error of the microwave radar lower than 0.02° and the speed fluctuation between ±0.6%.

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星载微波雷达驱动控制器设计

为了实现星载微波雷达的高精度、长寿命和高可靠性控制，设计了一种基于航天级抗熔丝FPGA的直驱永磁同步电机驱动控制器。建立了微波雷达结构的数学模型，分析了各环的频率响应特性。采用最小二乘法计算速度，提高了计算速度的精度。将双通道旋转变压器采集的位置信息与AD传感器采集的电流信号相结合，实现了对永磁同步电机的矢量控制。基于空间矢量脉宽调制(SVPWM)策略，获得圆形旋转场，提高了控制性能。所设计的空域搜索策略可以实现双闭环和三闭环控制之间的灵活自主切换。实验结果表明，该设计能够准确稳定地控制永磁同步电机，使微波雷达的位置跟踪误差小于0.02°，速度波动在±0.6%之间。

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2021 33rd Chinese Control and Decision Conference (CCDC)

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