一种弹体初始挂装姿态测量新方法

A new method for measuring the pose of projectile body in initial hanging

在弹体挂装试飞试验科目中,需要地面静态标定挂装弹体的姿态。针对挂装弹体无等高基准孔位的情况,提出一种基于旋转矩阵分解的计算方法。该方法只要求测量弹体的基本几何特征,综合采用特征探测算法、空间基准对齐算法、奇异值分解算法进行处理计算;为保证姿态测量参数的精度,要求在弹体粘贴辅助圆形标志时,分布要均匀,数量适中,提高空间基准对齐算法的稳健性。通过试验分析,在无等高基准孔位的情况下,旋转矩阵分解法能够实现姿态测量参数误差小于0.3°,方法切实有效,结果准确可靠,满足飞行试验的精度要求。

In the missile body flight subjects hanging test,the pose of the missile body needs to be calibrated on the ground. Under the condition of no same high datum hole,a method based on the decomposition of the rotation matrix is proposed. The method only requires the measurement of the basic geometric characteristics of the projectile; the feature detection algorithm,the spatial datum alignment algorithm,and the singular value decomposition algorithm are used comprehensively todeal with the computation; through experimental analysis,the rotation matrix decomposition method can achieve pose parameter accuracy above 0.3under the condition of no same high datum hole.In order to ensure the accuracy of measurement of pose parameters,the method requires auxiliarycircle mark pasted in the proje ctile, even distribution, moderate number, and improves the robustness of the spatial reference alignment algorithm. The actual test proves that the method is effective,accurate and reliable and fully meets the precision requirements of such tests.