| 基于Hilbert-Huang变换的航天器发射段力学环境分析 |
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| 引用本文： | 武江凯,白明生.基于Hilbert-Huang变换的航天器发射段力学环境分析[J].航天器环境工程,2018,35(3):223-227. |
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| 作者姓名： | 武江凯 白明生 |
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| 作者单位： | 1. 哈尔滨工业大学 航天学院, 哈尔滨 150001;2. 中国空间技术研究院 载人航天总体部, 北京 100094 |
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| 摘 要： | 文章基于Hilbert-Huang变换,对某载人航天器发射过程中整流罩分离期间测量的力学环境参数进行处理分析,利用HHT的基函数自适应性特点,得到振动时间历程信号的时频域Hilbert谱,准确识别出信号主频率及对应时间范围。此应用案例可为地面力学试验条件制定以及运载接口条件确定提供参考。
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| 关 键 词： | 航天器 力学环境分析 信号识别 Hilbert-Huang变换 Hilbert谱 |
| 收稿时间： | 2017/12/12 0:00:00 |
| 修稿时间： | 2018/5/28 0:00:00 |
Analysis of spacecraft mechanical environment during lift-off based on Hilbert-Huang transform |
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| WU Jiangkai,BAI Mingsheng.Analysis of spacecraft mechanical environment during lift-off based on Hilbert-Huang transform[J].Spacecraft Environment Engineering,2018,35(3):223-227. |
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| Authors: | WU Jiangkai BAI Mingsheng |
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| Institution: | 1. Department of Astronautics, Harbin Institute of Technology, Harbin 150001, China;2. Institute of Manned Space System Engineering, China Academy of Space Technology, Beijing 100094, China |
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| Abstract: | The paper, based on Hilbert-Huang transform (HHT) method, analyzes the dynamic environmental data recorded during the fairing separation process of fairing. The Hilbert spectrum in the time and frequency domain is acquired from a group of self-adapted primary functions. Meanwhile, the main frequency and the corresponding time range of the diachronic vibration signals are accurately identified. The example of using HHT to deal with the flight data can serve as a reference for the establishment of ground spacecraft mechanical test conditions and the examination of the interface conditions for the launch vehicle. |
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| Keywords: | spacecrafts dynamic environment signal identification Hilbert-Huang transform Hilbert spectrum |
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