弹道导弹在被动段轴向加速变轨弹道设计与优化

针对在被动段脉冲发动机轴向加速变轨突防弹道计算建立了飞行动力模型,通过弹道仿真计算分析了脉冲发动机点火时间和脉冲发动机工作时间对弹道的影响.脉冲发动机总冲一定时,短时间-大推力模式下导弹的射程最大.在爬升段点火时,短时间-大推力导弹能量利用最高;在下降段点火时,长时间-小推力能量利用率最高.同时提出了脉冲轴向加速变轨突防弹道优化的约束条件,并对该问题进行了优化计算,优化后的发动机质量比优化前减少了24.87%.

Design and optimization on trajectory of increasing velocity along its original velocity direction by impulse firing for ballistic missile to penetrate anti-missile system in passive ballistic curve

A fly dynamics model of ballistic missile to penetrate the anti-missile system in the passive ballistic curve, which was based on the increasing velocity along its original velocity direction, was established. The influences of the impulse engine work time and the impulse engine ignition time on trajectory were analyzed based on the result of trajectory simulation. With a constant total impulse, the short time-large thrust model had maximum range. When impulse engine ignited at climbing stage, the model of short time-large thrust had maximum utilization ratio of energy, while the model of long time-small thrust had maximum utilization ratio of energy at descending stage. The constraint conditions of the optimization problem of increasing velocity along its original velocity direction by impulse firing were given. The results of optimization show that the mass of impulse engine decreases 24.87%.