Featured characteristic of ineitial navigation system (INS) information, as short-term accuracy, ultra stability and self-determination, cannot be disturbed by electromagnetic interference. In light of these traits, a novel information processing approach aided by INS position and velocity information for anti-jamming application was proposed,. Based on missile-to-target relative motion model, during the terminal guidance tracking phase of anti-ship missile (ASM), target position and velocity information could be obtained by extended Kalman filtering to suppress seeker random measurement errors. When the jamming was detected, one can combine target position forecast with INS navigation solution to accomplish the homing guidance of ASM, which could help achieve one's purpose of anti-jamming. Simulation was carried out in the presence of a maneuvering ship target, and it shows that this method is effective and feasible because of its preferable anti-jamming performance.%惯导信息短期精度高、稳定性好,且自主工作,不受外界电磁干扰.基于惯导的这些特点,提出了一种利用惯导位置、速度信息辅助抗舷外干扰的信息处理方法:在反舰导弹末制导跟踪阶段,建立弹目相对运动模型,通过扩展卡尔曼滤波降低雷达导引头随机测量误差,获取目标位置和速度信息,当检测到干扰,通过对目标位置的预测和惯导对导弹位置的确定,实现对导弹的制导,以达到抗干扰的目的.在考虑舰船目标机动情况下进行了仿真实验,仿真结果表明了该抗干扰方法是有效和可行的.
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