一种适用于低成本制导火箭弹的坐标转换方法

基于某低成本制导火箭弹工程的研制背景，研究了制导火箭弹在飞行过程中不同坐标系间的转换关系。为了消除转换过程中的精度损失，深入分析了转换误差产生的原因；考虑弹载制导控制系统的实时处理能力，提出了一种适用于低成本制导火箭弹的坐标转换方法，并成功应用到数值仿真中。仿真结果表明：该方法能很好地兼顾误差和运算负荷，适于制导火箭弹的工程应用。

A Method of Coordinate Transformation for Low-cost Guided Rocket Projectiles

Based on the engineering background of the low-cost guided rocket projectiles,the transfor-mation relations between different coordinate systems of the guided rocket projectiles in flight were in-vestigated. It is considered that the precision loss of the coordinate transformation should be strictly handled for good messages in navigation. An analysis was made of the reason of errors on precision. Meanwhile,a new simple method of coordinate transformation was provided for easing real-time pro-cessing pressure of missile-borne computer,which is successfully applied in semi-physical simulation. The simulation result shows the correctness and feasibility of the method in engineering application of guided rocket projectiles,for it takes into account both precision loss and calculations.