大气层外拦截弹末段修正能力分析

Analysis of the Divert Ability of Exoatmospheric Interceptor During the Terminal Course

基于拦截末段相对运动动力学对大气层外拦截弹末段修正能力进行了分析。研究表明:当装药燃烧时间等于待飞时间时,拦截弹可消除的最大零控脱靶量可用结构加速度、待飞时间与燃料比冲的解析表达式描述,且是三者的单调增函数。若以导数最大值为影响拦截弹修正能力大小的指标,则待飞时间影响最大,燃料比冲影响最小,结构加速度的影响介于二者之间;当装药燃烧时间小于待飞时间时,拦截弹可消除的最大零控脱靶量不仅与结构加速度、待飞时间和燃料比冲有关,还与发动机可持续燃烧时间有关,可用四者的解析表达式描述。

The analysis of the divert ability of exoatmospheric interceptor during the terminal course is put forward based on the relative motion dynamics. Researches have shown that. the maximal zero effort miss which could be corrected is monotone increasing function of structure acceleration, time to go and fuel specific impulse if combustion time is equal to time to go. The time to go is the most important factor to the divert ability, the fuel specific impulse is the least important one and the structure acceleration between the two factors. The maximal zero effort miss which could be corrected is not only concerned with structure acceleration, time to go, fuel specific impulse but also combustion time. if combustion time is less than time to go. There is maximal value of the zero effort miss with different combustion time.