三轴光电跟踪系统对地平式天顶盲区出入点的判定方法

Determination of entry and exit points in alt-azimuth zenith blind region by three-axis electro-optical tracker

三轴光电跟踪系统可以全方位跟踪空间目标,在地平式光电跟踪系统天顶盲区内通过转动X轴实现快速高精度跟踪。用多种三轴光电跟踪系统对地平式天顶盲区进行判定,包括目标距离信息判定方式、Z轴转动速度判定方法、预置盲区判定方法等。判定方法的选择直接影响三轴光电跟踪系统的跟踪精度。理论分析和仿真表明:以Z轴的最大保精角速度来判定地平式盲区的出入点使三轴系统在天顶附近有更高的跟踪精度,且可实现跟踪方式的平稳过渡。

A three-axis electro-optical tracking system can be used to track any space target in all azimuth. It can rapidly and accurately track the target in the alt-azimuth zenith blind region by rotating X axis. Several determinant methods to track the targets in the alt-azimuth zenith blind region by the three-axis electro-optical tracking system were introduced, such as target range determinant method, Z axis angular speed determinant method, preset blind region determinant method and so on. Determinant methods to track targets in the blind region at zenith have a directly effect on the tracking accuracy of the electro-optical tracking system with three-axis gimbal. Analysis and simulation results prove that the determination of the entry and exit points in the alt-azimuth zenith blind region with maximum angular velocity of Z axis could help three axes trackers to achieve better tracking accuracy and smooth transfer of tracking mode.