THAAD拦截弹螺旋弹道仿真分析

Simulation and Analysis on Spiral Trajectory of THAAD Interceptor

针对美国THAAD拦截弹发射初期所进行的螺旋轨道飞行,对能量管理技术的原理和不同攻角下的螺旋飞行能量变化数据进行了分析;计算了不同螺旋弹道下的最大法向过载,结合法向过载变化曲线分析其对弹体设计等方面的影响;通过六自由度仿真进行验证,得出了能量管理的前提条件是导弹飞行须具备大攻角。仿真结果表明,大攻角飞行的能量耗散作用明显大于大机动飞行,同时法向过载的变化规律为弹道的设计提供了参考。

In order to find out the purpose and theory of spiral trajectory of THAAD interceptor at the initial launching stage, the principle of energy management and data of energy under different angles of attack were analyzed. The maximum normal overload under different spiral trajectory was computed, and the influence on missile was analyzed by combining the curve of normal overload, which was demonstrated by six- degree-freedom simulation. The conclusion shows that the premise condition of energy management is that the interceptor needs to have high angle of attack. The simulation results show that the flight at high angle of attack makes much more contribution to energy dissipation than the large maneuver flight. The change rule of normal overload offers reference for trajectory design.