相位匹配法用于提高非制冷全捷联导引头制导信息精度

捷联成像导引头中各个传感器的动态响应不一，直接合成不同传感器的信息提取的制导信息精度差，为获取更高精度的制导信息，需要改进提取方法。匹配滤波理论是在考虑传感器不同的动力学特性情况下的一种信息融合方法，依据传感器动态特性进行信息匹配的方法提高制导信息提取精度。首先建立非制冷全捷联成像导引头及其在制导控制系统中的简化模型，依据导引头上各种传感器主要指标，及匹配滤波的原则，推导出相位匹配器。最后，对匹配后的系统提取制导信息，并参与制导系统半实物测试，对比传统惯性滤波器与相位匹配滤波器的效果。在三轴仿真转台、半实物机及热十字丝目标的配合下，对转台扰动下的非制冷全捷联导引头进行静止和运动目标下的视线角速率提取，结果说明在相位匹配滤波的提取方法获得的视线角速率精度为0．2°／s，精度比传统惯性滤波提取方法提高了1倍。

Improving Guidance Message Extraction of Uncooled Infrared Imaging Seeker Using Phase Matching Method

The dynamic response of each sensor in the strapdown imaging seeker is different. The guidance message extraction precision by using direct message combination of different sensors is low. In order to obtain the guidance message with high precision, the extraction method should be improved. First, the model of uncooled strapdown imaging seeker and the model in the guidance control system are estabilished. The phase matching is derived according to the main charactertsrtcs of each sensor and the principle of match filtering. At last, the guidance message is extracted from the system after matching. The seme-physical test of guidance system is carried out, which compared to the traditional inertial filter and phase matching filter. The results show that line of sight rate precision is 0.2°/s by using extraction method of phase matching filter. The precision is increased to 2 times as compared with the traditional inertial filtering extraction method.