一种航天器微小相机的视场覆盖增强方法

Coverage-enhancing method for view of micro camera on spacecraft

随着航天器的组成及任务形式逐渐复杂,越来越多的航天器通过配置微小相机在轨实现关键目标及其动作过程的可视化遥测。针对航天器微小相机视场覆盖问题,建立了一种基于微小相机矩形视场的三维有向感知模型,可通过调整视场的俯仰角、偏航角和滚动角改变微小相机的感知方向及视场覆盖区域,同时制定了空间点覆盖判定准则,然后采用遗传算法优化相机安装位置及其视场的俯仰角、偏航角和滚动角实现目标运动空间区域的覆盖增强,并将其应用到月面采样空间区域的视场覆盖优化过程,仿真结果表明该方法能够有效提高微小相机视场对目标运动空间区域的覆盖率。

With the composition and task form of spacecraft becoming more and more complex,more and more spacecraft were equipped with micro camera to realize visual telemetry of key objectives and their acting process in orbit.A three-dimension directed perception model based on rectangle view of micro camera was proposed for the view coverage problem of micro camera on spacecraft in this article,where pitch angle,yaw angle and roll angle of view could be adjusted to change sensing direction and view coverage area of camera.The criterion for spatial point coverage was established simultaneously.Then,genetic algorithm was used to optimize the installation site of cameras and pitch angle,yaw angle and roll angle of their view in order to achieve the coverage enhancement of the target motion space area.The proposed method was applied to optimize view coverage of lunar surface sampling space area.Computer simulating results show an effective performance of the proposed method for improving coverage ratio by view of micro camera.