| 基于时/频域分析的光电吊舱稳定精度测试方法研究北大核心CSCD |
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| 引用本文： | 徐飞飞,杜言鲁,郑蕾,姜世洲,巩全成,王明超. 基于时/频域分析的光电吊舱稳定精度测试方法研究北大核心CSCD[J]. 应用光学, 2022, 43(4): 693-700. DOI: 10.5768/JAO202243.0403001 |
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| 作者姓名： | 徐飞飞 杜言鲁 郑蕾 姜世洲 巩全成 王明超 |
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| 作者单位： | 西安应用光学研究所，陕西 西安 710065 |
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| 基金项目： | 陕西省高层次人才特殊支持计划 |
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| 摘 要： | 稳定精度作为光电吊舱的关键性能指标之一,开展瞄准线稳定精度测试方法研究对于光电吊舱测试与验收具有重要意义。结合粗精组合稳定光电系统,提出一种基于时/频域分析的稳定精度测试方法。通过采集随机振动环境下惯性速率传感器和光学补偿元件的角位置信号,基于信号时域分析,得到图像漂移角速率、抖动及概率分布情况;基于信号频域分析,得到瞄准线角位置信号的功率谱密度。提出频段稳定精度贡献度,用于评估不同频段对稳定精度的影响程度;采用二级稳定效能提升度,评价二级稳定在不同频段对系统稳定性能的提升程度。该方法可以直观展示图像抖动及概率分布情况,同时给出影响瞄准线稳定精度的频率要素,对于指导机电系统设计具有重要的工程应用价值。
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| 关 键 词： | 光电吊舱 稳定精度 时域分析 频域分析 |
| 收稿时间： | 2022-05-18 |
Measurement method of stabilization accuracy of electro-optical pod based on time/frequency domain analysis |
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| Xu F.Du Y.Zheng L.Jiang S.Gong Q.Wang M.. Measurement method of stabilization accuracy of electro-optical pod based on time/frequency domain analysis[J]. Journal of Applied Optics, 2022, 43(4): 693-700. DOI: 10.5768/JAO202243.0403001 |
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| Authors: | Xu F.Du Y.Zheng L.Jiang S.Gong Q.Wang M. |
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| Affiliation: | Xi'an Institute of Applied Optics, Xi'an 710065, China |
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| Abstract: | The stabilization accuracy is one of the key performance indicators of electro-optical pod, and the research on the measurement of line of sight stabilization accuracy is significant for the measurement and acceptance of electro-optical pod. Combined with coarse and fine platform stabilization of electro-optical system, a measurement method of stabilization accuracy based on time/frequency domain analysis was proposed. By collecting the data of inertial angular-rate sensor and optical compensation elements under random vibration environment, the angular rate, image jitter and probability distribution of image drift were obtained based on the signal time-domain analysis. Based on the signal frequency-domain analysis, the power spectral density of line of sight angular position signal was obtained. The frequency band stabilization accuracy contribution was proposed, which could evaluate the influence degree of different frequency bands on stabilization accuracy. The efficiency improvement with two-level stabilization was used to evaluate the improvement degree of two-level stabilization in different frequency bands on system stabilization performance. This method can intuitively reveal the image jitter and probability distribution, and give the frequency factors affecting the stabilization accuracy of line of sight, which has important engineering application value for guiding the design of electromechanical system. |
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| Keywords: | electro-optical pod frequency-domain analysis stabilization accuracy time-domain analysis |
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