多机只测角无源定位中的空间对准方法

空间对准是实现多机只测角无源定位首先要解决的问题,对此,提出一种适合该应用背景的空间对准方法.该方法选择融合载机初始时刻地理坐标系作为融合中心坐标系,首先将载机在各自机体坐标系中获得的方位角转换到各自载机地理坐标系中;然后再将其转换到原点位于各载机质心、与融合中心地理坐标系平行的坐标系中,推导出方位角位于此坐标系的解析表达式.对目标来波方向、载机姿态角、各载机相对融合中心距离等因素的影响进行仿真分析,得出了各因素对空间对准过程影响的量化结论.

Spatial alignment method for airborne multi-plane bearings-only passive localization

Spatial alignment is the first problem that needs to be solved in multi-plane bearings-only passive localization. Therefore, a suitable spatial alignment method is proposed for this application background. The proposed method selects the fusion plane''s geographic coordinate system at initial time as the fusion center coordinate system. Firstly, the bearing got in each plane''s body coordinate is converted to the one in each plane''s geographic coordinate system, which is further converted to the coordinate system which is parallel to the geographic coordinate system of the fusion center and has its origin located at the centroid of the plane. Besides, the analytical expression is deduced for the bearing converted to this coordinate system. Simulation analysis verifies the influence of factors such as the target''s direction of arrival, the attitude angle of the plane and the distance between the fusion center and the plane, which yields some quantitative conclusions.