雷达寻的导弹天线罩像差补偿方法研究

On Compensation for Refraction Error of Radome of Homing Missile

分析了寻的导弹天线罩折射误差产生的原因，从系统的观点出发，提出了一种天线罩折射误差的完全补偿方法，推导出了补偿条件及补偿信号的形式。仿真结果表明：该方法具有很好的效果，而且方法简单，易于工程实现。

Susumu in 1988[3] considered refraction error of radome of homing missile in his guidance algorithm without, however, giving even an outline of such consideration. We now present our method on how to compensate for such refraction error.Our compensation is done mainly through computing range of compensating signal with eq. (17). Eq. (17) is not directly related to our theoretical analysis, which, however, is quite helpful in establishing eq. (17). Eqs. (6) and (7) are especially important in our theoretical analysis. Eq. (6) allows us to compute effective navigation ratio N 'of missile, with index of refraction R taken into consideration. Eq. (7) requires that R should fall within a proper range dependent on Vm/Vc, where Vm and Vc are velocities of missile and target respectively.Results of simulation calculation for an air- to- air missile are given in Table 1. Five values of R are selected:-4', -2', 0', 2', 4'. Three values of H (altitude of missile) are taken:18km, skin, and 0. 3km. It can be seen that miss distance can be reduced with our method of compensation. Our compensating signals fall within the range of eq. (17) and their specific values are selected from experience.