考虑雷达导引头前馈补偿的一体化制导方法

Integrated guidance method considering radar seeker feedforward

针对大机动目标使空空导弹雷达导引头跟踪误差加大和制导精度下降的问题,提出了一种考虑雷达导引头前馈补偿的一体化制导方法。针对机动目标,构造视线角速度前馈补偿回路,对雷达导引头角跟踪系统进行补偿,提高导引头响应速度,降低跟踪误差角。基于视线坐标系设计一体化制导算法,采用卡尔曼滤波器对弹目视线角速度和目标加速度进行估计,将视线角速度信息前馈补偿到导引头跟踪回路中,将目标加速度信息补偿到最优制导律中,同时实现雷达导引头视线角快速跟踪和最优制导律制导信息提取。仿真结果表明,一体化制导算法可同时实现对导引头视线角速度和目标机动的估计,从而提高制导精度。

Aiming at a large maneuvering target, air-to-air missile radar seeker tracking error will increase and guidance accuracy will decline. A new radar seeker feedforward intergated guidance technology is proposed based on the maneuvering target. In order to accelerate the seeker＇s response speed and reduce the tracking error, a line-of-sight（LOS） angular rate feedforward loop is designed to compensate the radar seeker angle tracking system. Based on the LOS coordinate system, the radar seeker intergated guidance algorithm uses the Kalman filter to estimate both LOS angular rate and target acceleration. Then compensate estimated LOS angular rate commend to the seeker tracking system and compensate estimated target acceleration to the optimal guidance law. Simulation results show that the radar seeker intergated guidance algorithm can estimate LOS angular rate and target aeceleration at the same time.