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数模转换器分辨率对捕获、跟踪、瞄准系统跟踪精度的影响

Effects of Digital to Analog Converter Resolution on ATP System Tracking Accuracy

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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,得出干扰抑制带宽之外的频段内数模转换器的分辨率与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 presenting structure, control principle and control algorithm of acquisition, tracking and pointing (ATP) fine tracking subsystem, the semi physical model is built to analyze the tracking performance of digital to analog converters with different resolution, and the tracking contrast experiments are carried out on the same beam position and the beam after disturbance. Combined with the signal transmission of fine tracking control system, the effects of digital to analog converters with different resolution on the tracking accuracy of ATP system are analyzed. The experimental results show that the higher the resolution of digital to analog converter is, the better the tracking performance of the ATP system is. However, when a 14 bit digital to analog converter is used, there is little contribution to improve tracking accuracy even continue to increase the resolution. By analyzing the spectral component of spot centroid signal after tracking, we find that the resolution of digital to analog converter within frequency band and outside the disturbance suppression bandwidth is proportional to the corresponding spectral component, so it is necessary to improve the disturbance suppression bandwidth of fine tracking system to achieve high accuracy tracking.

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中图分类号:TN929.1

DOI:10.3788/cjl201744.0806004

所属栏目:光纤光学与光通信

基金项目:国家自然科学基金(61302181)

收稿日期:2017-02-23

修改稿日期:2017-04-12

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陈少杰: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, 上海 200083中国科学院大学, 北京 100049
张 亮: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, 上海 200083
王建宇: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, 上海 200083

联系人作者:陈少杰(chenchenshaojie@163.com)

备注:陈少杰(1990-), 男, 博士研究生, 主要从事光束精跟瞄方面的研究。

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引用该论文

Chen Shaojie,Zhang Liang,Wang Jianyu. Effects of Digital to Analog Converter Resolution on ATP System Tracking Accuracy[J]. Chinese Journal of Lasers, 2017, 44(8): 0806004

陈少杰,张 亮,王建宇. 数模转换器分辨率对捕获、跟踪、瞄准系统跟踪精度的影响[J]. 中国激光, 2017, 44(8): 0806004

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