CZ2F火箭POGO振动信号特征频率提取  

Extraction of Feature Frequency of POGO Vibration Signal for CZ2F Launch Vehicle

作　　者：张建海[1,2] 韩迎春[1,2] 吴功友[1,2] 李连周 刘军[2] 

机构地区：[1]宇航动力学国家重点实验室,西安710043 [2]中国西安卫星测控中心,西安710043

出　　处：《飞行器测控学报》2015年第4期362-367,共6页Journal of Spacecraft TT&C Technology

基　　金：国家自然科学基金项目(No.11276072);宇航动力学国家重点实验室基础研究项目(No.2013ADL0208)

摘　　要：CZ2F运载火箭在第5次飞行过程中意外出现了"8Hz"POGO振动现象,该振动频率对箭体的稳定性和航天员安全产生了严重的影响。为解决这一振动问题,必须精确分析该频率的持续时间和振动量级。通过研究HHT(Hilbert-Huang Transform,希尔伯特-黄变换)方法,结合火箭振动信号特点设计了特征频率提取算法,成功地提取了CZ2F火箭飞行中的"8Hz"POGO振动频率,为有效解决"8 Hz"POGO振动问题提供了技术支撑。During the fifth flight of CZ2 Frocket,＂8Hz＂POGO vibration was encountered and it had a severe impact on stability of the launch vehicle and astronaut safety.To accurately analyze the duration and vibration of the feature frequency to solve the＂8Hz＂problem,HHT（Hilbert-Huang Transform）method was used,and in combination with the characteristics of launch vehicle vibration signal,a feature frequency extraction algorithm was designed and it successfully extracted the CZ2 F ＂8 Hz＂vibration frequency.The solution provides effective technical support for solving the＂8Hz＂POGO vibration problem.

关 键 词：特征频率 POGO振动 CZ2F火箭 HHT 

分 类 号：O327[理学—一般力学与力学基础]