捷联式反辐射导引头角跟踪技术研究

Angle tracking technique for strapdown anti-radiation seeker

对于工作在低频段的地空反辐射导引头,传统的稳定平台式导引头无法满足小口径要求,为此采用捷联干涉仪体制。但是采用该体制后,天线是固定安装在弹体上的,无法直接提取比例导引指令,必须寻求新的解决方案。针对该问题,提出采用捷联式角跟踪与解耦方法来消除导引头的弹体姿态扰动耦合,实现视线稳定跟踪。首先,给出了捷联式角跟踪与解耦技术的工作原理与实现方法,在此基础上,对系统进行了仿真建模与性能分析。结果表明,测量误差和噪声较小时,该方法能获得较好的解耦与跟踪性能,所得结果为捷联式导引头角跟踪系统的工程实现提供了理论基础,也为未来导引头的小型化需求提供了一种新的解决方案。

For surface-to-air anti-radiation seeker work at low frequency,conventional seeker with rate gyroscope stabilization platform doesn＇t meet the need of small aperture,which leads to strapdown phase-interferometer system is adopted. But this system can＇t get proportional guidance instruction directly because the antenna system is mounted on missile body. In order to resolve this problem,the strapdown angle tracking and decoupling technique is put forward to isolate missile attitude coupling so as to stabilize line-of-sight. The operating principle and realizing method are presented. On this basis, system modeling, simulating and performance analyzing are done. The results show that good performance of decoupling and tracking is achieved when measuring error and noise are weak. The results obtained provide a theoretical foundation for engineering design of strapdown seeker angle tracking system,and it will be a new solution for seeker＇s miniaturization in future.