捷联式天线平台双通道耦合目标跟踪滤波器设计与仿真研究

采用传统速率陀螺稳定平台的导引头角跟踪系统可以直接提取用于比例导引的惯性视线角速率，而采用捷联稳定方案后，天线平台的角跟踪系统失去了直接测定视线角速率的能力，视线角速率需要通过数字计算的方法来提取。同时由于视线的旋转，实际的角跟踪系统方位和俯仰两个通道之间存在交叉耦合，与速度跟踪系统之间也具有参数耦合关系。针对上述问题，提出双通道耦合目标跟踪滤波器的设计方法，并在考虑与捷联稳定控制系统及速度跟踪系统信息相互融合的情况下，对整个角跟踪系统进行了闭环仿真，对捷联式天线平台角跟踪系统的性能进行了系统的分析。结果表明：角跟踪系统方位与俯仰通道滤波值能很好跟踪真值，提出的设计方法在捷联式天线平台角跟踪系统中的应用是有效的。

Study of Design and Simulation of Cross-coupling Tracking Filter for Strapdown Antenna Platform

The inertial Line-of-sight (LOS) rate for proportional navigation can be obtained directly with rate gyroscope stabilization platform. But inertial LOS rate of seeker with strapdown stabilization platform need to be obtained by digital computation. At the same time, there are cross-coupling between azimuth channel and elevation channel of angle tracking system because of LOS rotation. And angle tracking system also has parameters coupling with velocity tracking system. For these problems a new design method of cross-coupling tracking filter was proposed. The closed loop simulation was carried out considering information fusion with strapdown stabilization control system and velocity tracking system. The performance of angle tracking system was analyzed systemically. Practical parameters and simulating results were given. Results show that filtering values are consistent with true values both azimuth channel and elevation channel. The method presented is effective for strapdown antenna platform.