捷联导引头测量信息中耦合了弹体姿态信息,无法直接运用于制导指令解算。基于下视的捷联寻的方案,建立了从探测视线信息和弹体姿态信息中提取惯性视线角的理论解耦模型以及在倾斜稳定情况下的简化形式。通过非线性微分滤波器——跟踪微分器获得平滑的惯性视线角速率,设计了捷联寻的弹药制导综合系统。弹道仿真结果表明:基于下视的捷联寻的方案能够有效实现近程制导弹药的精确制导,具有一定的工程价值。

Detecting information of strapdown seeker was coupled with missile attitude information, so it can't be used for calculating guidance command directly. Based on the downward-looking strapdown homing scheme, the theoretical decoupling model of LOS( line-ofsight) angle from detecting LOS information and missile attitude information was established, as well as its simplified form under rolling stabilizing circumstance. By means of a nonlinear differential filter-tracking differentiator, smooth inertial LOS rate was acquired and a guidance synthetic system of strapdown seeker homing munitions was designed. Trajectory simulation results show that, based on downwardlooking strapdown homing scheme, precise guidance of short-range guided munitions can be accomplished effectively, which has definite value in engineering.