针对船体摇摆使导航雷达波束偏移,影响雷达探测问题,提出了基于波束数字补偿技术,弥补雷达波束随舰船摇摆而导致方位指向偏移,消除纵横摇对方位角精度等雷达性能的影响。首先建立船体纵横摇数学模型,对目标回波特性分析,采用矢量变换、平面旋转变换结合立体几何关系得到水平波束方位角真值;同时分析了海面波束增益变化、海面指向波束宽度变化及低空目标方位补偿剩余;最后通过仿真验证了高海情及低海情下对波束的影响。该方法可以为雷达工程实现提供理论支撑。

Aiming at the problem that beam deviation of navigation radar caused by ship swing may influence radar detection performance, this paper puts forward a solution based on digital beam compensation technique so as to make up the azimuth pointing deviation caused by radar beam moving with ship swing and eliminate influence to azimuth accuracy etc radar performance by pitch/ roll swing. At first, this paper establishes mathematic models for ship pitch/ roll and makes target echo analysis ,employs vector transform and plane rotary transform with solid geometry relation obtain real value of azimuth angle of horizontal beam, and conducts analysis to change of horizontal beam gain and beam width and azimuth compensation remainder of low鄄altitude targets. The effectvenss of this method is validated by simulation at high & low sea condition and it is able to provide theoretical support for radar engineering.

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