曲面地表对远程火箭弹弹道影响的计算方法

远程火箭弹飞行时间长、射程远,必须考虑地球曲面地表对弹道的影响。分析了椭球地表模型下重力加速度的算法以及远程火箭弹射程的确定方法,根据远程火箭弹动力学模型,设计了一种以落点为原点的落点坐标系弹道仿真方法,比较了平面地表弹道模型、椭球地表弹道模型以及基于落点坐标系的曲面地表弹道模型的仿真效果。仿真结果表明,该方法不仅比椭球地表弹道模型简单而且精度很高,可以很好地解决曲面地表对弹道的影响。

A Calculation Method for Influence of Curved Earth Surface on Far Range Rocket Projectile Calculating Trajectory

With the characteristic of long flying time for far range rocket projectile,the influence of curved earth surface must be considered.The calculation method for gravity and fire range is analyzed.With the dynamic model of long-range rocket projectile,a calculating trajectory method which is based on the destination coordinate system is presented.Also,the plane earth model,the sphere earth model and the sphere earth model based on the destination coordinate system are compared.The simulation result shows that the sphere earth model based on the destination coordinate system is simpler and more accurate than the other,it could be used to solve the influence of curve earth surface.