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针对某激光导引头检测中输出弹目视线角速度误差较大的情况,分析指出弹目视线角速度噪声是角跟踪回路中探测器噪声、弹体扰动和摩擦等干扰力矩共同作用产生的。根据导引头控制原理建立了其稳定跟踪回路模型,定量分析了这些误差因素对导引头稳定跟踪性能和弹目视线角速度输出指令的影响程度。然后实测分析了激光导引头输出弹目视线角速度噪声特性,建立了其与弹目距离的函数关系,并将其加入某制导武器制导模型中进行仿真。结果表明:加入弹目视线角速度噪声后,弹体滚转姿态角变化较大,舵偏角变化也较大,近距离时由于角速度指令噪声较小对全弹道及脱靶量的影响比较小,这与实际检测结果相符较好。但近距时当角速度指令处于噪声峰值处,弹偏离后来不及修正可能会对导弹的近距攻击区有影响,研究方法及结论对导引头的实际研究测试及弹的战术使用均有一定的参考价值。
Aiming at the large error of the sight line angular velocity of the output projectile in a laser seeker, it is pointed out that the projectile angular velocity noise is caused by the interaction of the detector noise, projectile perturbation and friction in the angular tracking loop. According to the principle of seeker control, the stable tracking loop model was established, and the influence of these error factors on the tracking performance of seeker and the output command of projectile angular velocity was quantitatively analyzed. Then the visual angular velocity noise characteristics of the laser seeker output projectile were measured and measured. The relationship between the angular velocity and the missile projectile velocity was established as a function of the projectile distance, and then was added into a guided missile guidance model for simulation. The results show that the attitude angle of projectile varies greatly when the projectile’s angular velocity noise is added, and the variation of the projectile’s deflection angle is large. When the distance is small, the impact of the smaller angular velocity command noise on the whole ballistic and miss distance is relatively small Good agreement with the actual test results. However, when the angular velocity command is at the peak of the noise at close range, if the deviation of the missile is later than that of the near-miss angle, it may have an impact on the close attack zone of the missile. The research methods and conclusions have certain effects on the actual research test of the seeker and the tactical use of the projectile Reference value.