旋转式CCD漂移扫描观测的控制模型研究

Model of Drift-scan CCD's Rotation Control

采用CCD漂移扫描技术可以显著提高地基光电望远镜系统的观测效率,改善空间目标的数据质量,但目前不适合对快速移动目标的观测。把CCD漂移扫描技术与精密控制的旋转装置相结合是扩展其应用的一种解决思路,本文在分析CCD漂移扫描技术的基础上,建立了一种旋转式CCD漂移扫描观测的控制模型。同时运用模型进行了模拟观测实验,并分析了旋转角度、脉冲控制周期等模型参数对观测效果的影响,其结果不仅验证了该旋转控制模型构造的合理性,而且也能为实际观测提供参考依据。

CCD drift-scan technique can improve the survey efficiency of ground-based optoelectronic telescope system and the data precision of space targets. But, it is not suitable to survey the fast moving targets at present. Combinning with a rotated device of exactitude control is one of ways to spread the application of CCD drift-scan technique. The square CCD plane array was taken as template, and the model of drift-scan CCD＇s rotation control was founded based on the study of CCD drift-scan technique. Then, the model was used to do the simulation experiment of observation. Furthermore, the imaging effect of different model parameters including revolving angle and pulse control period on survey was analyzed. By validating the above analyses through experiments, the rotation-control model proposed is showed to be available, and the relative results can be used as references for real survey.