螺旋再入弹道特性分析

Analysis of Characteristics of Spiral Reentry Trajectory

针对螺旋再入弹道低空发散问题,提出一种减小弹头落点侧向位移的工程方法.通过仿真计算,研究了螺旋再入弹道的飞行规律、特点以及落点精度等问题.仿真计算表明,该方法是可行的,能够有效减小落点的横向偏差.结果表明,螺旋再入弹道的机动能力与升力系数密切相关,升力系数越大,螺旋弹道机动能力越强,其纵向射程相对弹道式再入弹道偏小.

According to the divergence of spiral reentry trajectory in low altitude, an engineering method of minishing the impact point displacement on the side direction was put forward. The flight laws, characteristics and impact point precision of spiral reentry trajectory were studied by simulating calculation. The simulation indicates that the method is correct and effective, and is able to minish thetransverse deviation. The results show that the maneuver ability of spiral reentry trajectory is related to the lift coefficient. The larger the lift coefficient, the maneuver ability higher becomes. The range of spiral reentry trajectory is lower than ballistic reentry trajectory.