数模转换器分辨率对捕获、跟踪、瞄准系统跟踪精度的影响

发布时间：2018-03-15 22:25

本文选题：光通信　切入点：捕获　出处：《中国激光》2017年08期 　论文类型：期刊论文

【摘要】：在介绍捕获、跟踪、瞄准(ATP)精跟踪子系统结构、控制原理及控制算法的基础上,通过搭建半物理模型来分析不同分辨率数模转换器对应的跟踪性能,分别对同一位置光束与加入扰动后的光束进行跟踪对比实验。结合精跟踪控制系统的信号传输,分析不同分辨率的数模转换器对ATP系统跟踪精度的影响。实验结果表明,数模转换器的分辨率越高,ATP系统的跟踪性能就越好;使用14位数模转换器时,继续增加分辨率,ATP系统的跟踪精度没有得到显著提升。对跟踪后的光斑质心信号进行频谱分量统计,发现干扰抑制带宽之外的频段内数模转换器的分辨率与其对应的频谱分量成正比,因此需要进一步提高精跟踪系统的干扰抑制带宽来实现更高精度的跟踪。
[Abstract]:On the basis of introducing the structure, control principle and control algorithm of capture, tracking and aiming ATP fine tracking subsystem, the tracking performance of digital-to-analog converter with different resolution is analyzed by building a semi-physical model. The experiments of tracking the same position beam and the beam with disturbance are carried out respectively. Combining with the signal transmission of the precision tracking control system, the influence of different resolution digital-to-analog converters on the tracking accuracy of ATP system is analyzed. The experimental results show that, The higher the resolution of the digital-to-analog converter, the better the tracking performance of the ATP system; when using a 14-digit digital-to-analog converter, The tracking accuracy of the ATP system has not been significantly improved by increasing the resolution. The spectral components of the centroid signal of the spot after tracking have been counted. It is found that the resolution of the DAC in the frequency band outside the interference suppression bandwidth is proportional to the corresponding spectral component, so it is necessary to further improve the interference suppression bandwidth of the precision tracking system to achieve more accurate tracking.
【作者单位】：中国科学院上海技术物理研究所空间主动光电技术重点实验室;中国科学院大学;
【基金】：国家自然科学基金(61302181)
【分类号】：TN792;TN929.1

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