Design of Drive Controller for Spaceborne Microwave Radar

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%.