顶空无盲区跟踪的舰载倾斜三轴雷达的研究

Slant 3-axes Radar for Shipborne Tracking in Whole Airspace without Blind Zone

从工程实际出发 ,分析了俯仰不严格水平对雷达测角系统的误差 ,提出了倾斜三轴的雷达天线座结构形式 ,讨论了倾斜角度的取值范围 ,推导出各轴旋转的角度公式 ,对船摇及目标运动引起的各轴角速度和角加速度的变化给出了切实可行的计算方法 .计算和仿真表明 ,这种结构在工程上可以做到较高的角度跟踪精度 ,能达到波束无倾斜和全空域跟踪无盲区 ,并指出此系统可以减少俯仰轴的最大转动角 ,从而降低系统对俯仰轴的角速度和角加速度的技术要求 .

The analysis of an angular error caused by the elevation axis not in a horizontal plane indicated that a three_axis perpendicular radar can not track in a whole airspace,and the struautre of a slant three_axis radar is therefore proposed.The range of slant angle is discussed and formulae are deduced for calculation of angles.Different ways are suggested for calculation of angular velocitied about different axes and varation of accelerations resulting from swing of ship and movement of target.Computer simulation indicates a slant 3-axes radar can be used for target tracking in a whole airspace without blind zone and beam slant.It is conduded that a slant 3-axes radar can reduce the maximum angle for the elevation axis in comparison with the 3-axes perpenicular radar and relax the technical requirement for an angular velocity and the acceleration of the elevation axis.