高精度机载SAR波束机相复合稳定技术应用研究

Application Research of High-precision Airborne SAR Beam Mechanical Phase Combination Stabilization Technology

机载平台多方向运动误差是影响机载SAR/MTI雷达目标探测精度的重要因素之一,在伺服转台实现方位向360度大视角情况下,仅依靠伺服转台机械机构难以实现天线波束多维稳定。为满足机载SAR/MTI雷达波束稳定和目标高精度探测需要,研究提出高精度机载SAR波束机相复合稳定技术,解决了机相复合控制、精度和实时性等技术难点,经过试验实测,雷达波束机相复合稳定精度达到0.15度,验证了方法有效性。

The multi-directional motion error of airborne platform is one of the important factors that affect the target detection accuracy of airborne SAR/MTI radar.When the servo turntable achieves azimuth 360 degrees large angle of view,it is difficult to achieve multi-dimensional stability of antenna beam only relying on the mechanical mechanism of servo turntable.In order to meet the needs of airborne SAR/MTI radar beam stability and high-precision target detection,the paper proposes the high-precision airborne SAR beam mechanical phase combination stabilization technology,which solves the technical difficulties of the mechanical phase combination control,precision and real-time performance.After experimental measurements,the stability accuracy of the radar beam mechanical phase combination reached 0.15 degrees,which verified the effectiveness of the method.