高空高速拦截时,导弹制导时间常数和转弯速率时间常数较低空大幅增加,导引系统寄生耦合效应极有可能引起较大脱靶量,导致拦截失败.针对这一问题,文中建立五阶线性化制导控制系统模型,通过理论分析和仿真验证两种形式重点研究了寄生效应的影响因素及对制导性能的约束.结果表明,寄生效应制约着系统最小制导时间常数,提高系统响应快速性须首要缓解寄生效应;提升导弹攻击速度可有效减小寄生效应影响.

Since there would be a significant increase in missile guidance time constant and turning rate time constant when intercepting high-altitude and high-speed targets, compared with those at low altitude, small parasitic effect of seeker could probably cause large miss, resulting in failure of intercepting mission. To deal with this issue, the fifth-order linearized mathematic model was constructed on guidance and control system and both analytical ways and simulation ways were employed to investigate parasitic effect's relating factors and its influence on performance of proportional guidance. The results show that the parasitic effects of seeker constrain the guidance time constant, it means that a smaller guidance time constant must firstly loose the system parasitic effects and this could be reached by improving the missile's speed.