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为提高高超声速变质心再入弹头的突防能力,设计了一种基于主动螺旋机动的突防弹道。在建立变质心弹头动力学模型和弹目运动学模型的基础上,引入新的控制变量,通过控制质量块的偏移位置,将速度矢量和弹目连线的夹角控制在固定值并且使速度矢量绕弹目连线以一定转速旋转来实现螺旋机动。在实现螺旋机动的基础上,推导了弹体处于螺旋机动状态下的螺旋机动半径和稳态脱靶量均方根的解析解。六自由度弹道仿真表明,所设计的突防方案使再入弹头能够进行有效的螺旋机动,通过合理控制机动幅度大小,可以在实现螺旋机动突防的同时保证较高的命中精度。
In order to improve the penetration ability of hypersonic metamorphic heart reentry warhead, a kind of sudden-impact ballistic missile based on active spiral maneuver was designed. Based on the establishment of modified model centroid dynamic model and projectile kinematic model, a new control variable is introduced. By controlling the offset position of the mass block, the angle between the velocity vector and the projectile’s line is controlled at a fixed value Speed vector around the projectile line to rotate at a certain speed to achieve spiral motor. Based on the realization of helical maneuver, the analytic solution of the mean square root of helical maneuvering radius and steady-state miss distance of the projectile in the helical maneuvering state is deduced. Six-degree-of-freedom trajectory simulation shows that the designed penetration scheme enables the reentry warhead to perform effective helical maneuvering. By controlling the maneuvering amplitude rationally, it is possible to achieve high penetration accuracy while achieving helical maneuvering.