全捷联被动雷达末制导系统设计

Design of terminal guidance system for strapdown passive radar

为解决全捷联被动雷达导引头大测量误差下的精确制导问题,从实际工程应用角度出发,对全捷联被动雷达末制导系统进行了研究。首先,建立了全捷联被动雷达导引头模型。其次,针对系统非线性、滤波稳定性、计算量及制导与姿态控制的耦合问题,提出了基于容积卡尔曼滤波(cubature Kalman filter,CKF)的制导信息提取、滑模变结构制导、三回路过载驾驶仪等算法相结合的末制导系统方案。最后,结合反辐射导弹应用场景,建立全系统仿真模型进行方案验证。结果表明,所设计的末制导系统对静止目标的打击精度为2 m,对于15 m/s以内的慢速移动目标,也具有较好的适应能力,落点圆概率误差(circular error probability,CEP)可以达到10 m左右。

In order to solve the problem of precision guidance under the condition of large measurement error of the strapdown passive radar seeker,the terminal guidance system of strapdown passive radar is studied from the perspective of practical engineering application.Firstly,the strapdown passive radar seeker model is established.Secondly,in view of the problems of system nonlinearity,filter stability,calculation amount and the coupling of guidance and attitude control,a terminal guidance system scheme based on the algorithms of guidance information extraction with cubature Kalman filter(CKF),sliding mode variable structure guidance,three-loop overload pilot and so on is proposed.Finally,combined with the anti-radiation missile application scene,the system-wide simulation model is established for the scheme verification.The results show that the hit accuracy is 2 m when hitting the stationary target by using the designed terminal guidance system,and the system has a good adaptability for the slow moving target within 15 m/s,the impact point circular error probability(CEP)can reach about 10 m.