伴随法在防空导弹脱靶量研究中的应用

Application of Adjoint Method in the Study of Miss Distance of Air Defense Missile

基于小角度假设,建立了末制导阶段弹目相对运动的线性化模型。根据该模型,由直接法仿真得到了目标机动情况下的脱靶量曲线。分别由系数矩阵法和框图法得到了原系统的伴随系统,伴随系统仿真结果和直接法仿真结果的比较说明伴随法能很好地对线性时变系统进行仿真。与直接法比较,伴随法效率较高,适用于导弹制导系统的初步分析。

The linear model of relative missile and target motion in the terminal homing is built up by using small-angle approximations. With the model, the profiles of miss distance due to target maneuver are obtained from the direct simulation. The adjoint of the original system is derived from the coefficient matrix and block diagram, respectively. The adjoint simulation results are identical to the direct simula- tions. Compared with the direct simulation, it is shown that a great deal of information is available in a single adjoint computation. The adjoint method is useful for the preliminary design of guidance system of the missile.