基于Hilbert-Huang变换的航天器发射段力学环境分析  

Analysis of spacecraft mechanical environment during lift-off based on Hilbert-Huang transform

作　　者：武江凯 白明生[2] WU Jiangkai;BAI Mingsheng(Department of Astronautics,Harbin Institute of Technology,Harbin 150001,China;Institute of Manned Space System Engineering,China Academy of Space Technology,Beijing 100094,China)

机构地区：[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

出　　处：《航天器环境工程》2018年第3期223-227,共5页Spacecraft Environment Engineering

基　　金：国家重大科技专项工程

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。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.

关 键 词：航天器 力学环境分析 信号识别 HILBERT-HUANG变换 Hilbert谱 

分 类 号：V416.2[航空宇航科学与技术—航空宇航推进理论与工程]