全捷联导引头隔离度指标工程计算方法

Engineering calculation method of strap-down seeker disturbance rejection rate index

为计算工程化的隔离度幅值指标,建立了引入末制导回路的隔离度寄生回路模型,得出了基于不同末制导剩余时间下的隔离度临界幅值。针对6种常用误差模型下隔离度正反馈幅值的影响,提出了一种引入制导回路的末制导剩余时间值的计算方法。将目标常值机动、初始速度矢量角误差、目标随机机动、目标角闪烁噪声、褪色噪声以及接收机噪声分为3类,得出了关于相对速度比、隔离度幅值与无量纲脱靶量的变化曲线,利用脱靶量取值时间、裕度限制、脱靶量变化趋势以及实际脱靶量等方法综合判断隔离度幅值指标,并根据该指标估算出在映射隔离度指标时,需要引入制导回路的末制导剩余时间值,为工程应用提供了参考。

In order to calculate the engineeized disturbance rejection rate （DRR） amplitude index accurately, the terminal guidance loop was introduced into the model of disturbance rejection rate parasitic loop. For the influence of the positive feedback disturbance rejection rate amplitude under the six common error models, a calculation method of terminal guidance time remaining used for working in the guidance loop was presented. These were classified to three types for the constant target maneuver and initial angle error, random target maneuver, glint noise and faded and receiver noise, the relationship of relative speed ratio, the disturbance rejection rate amplitude and dimensionless miss distance was obtained, and the disturbance rejection rate amplitude index was estimated by the overall judgment of the miss distance value time, margin limits, miss distance change trend and practical value, which provide references for engineering application.