航天器工程2019，Vol.28Issue(1)：55-59,5.DOI:10.3969/j.issn.1673-8748.2019.01.008
采用幅度谱索引法的航天器密封结构泄漏点定位方法
Leakage Location Method of Spacecraft Sealed Structure Using Amplitude Spectrum Index Method
摘要
Abstract
Aiming at the leakage location problem of complex stiffened plate structure of spacecraft shell,an amplitude spectrum index method for positioning continuous leak signals in complex structures is proposed.The method uses a distributed sensor network to build an index matrix based on the a priori amplitude spectral feature values and determine the leak location based on the minimum variance.An experimental system using a laser Doppler vibrometer and a reinforced aluminum plate is built. Three types of 135 sound sources were selected for positioning experiments.The experimental results show that,with the grid center coincident,the average error of 4.3 mm can be achieved, and the average positioning error of all samples is 2 1.7 mm.The proposed amplitude spectrum index method has certain universality.The technical method is also applicable to structural health monitoring and leak location warning of complex structures of other spacecraft.关键词
幅度谱索引法/航天器/加筋板/泄漏/定位Key words
amplitude spectrum index method/spacecraft/stiffened plate/leakage/positioning分类
通用工业技术引用本文复制引用
芮小博,李一博,刘圆圆,綦磊,曾周末..采用幅度谱索引法的航天器密封结构泄漏点定位方法[J].航天器工程,2019,28(1):55-59,5.基金项目
国家重点研发计划项目(2018YFF0212201),天津市自然科学基金一般项目(17JCYBJC19300),北京卫星环境工程研究所创新基金(CAST-BISEE2017-013 ) （2018YFF0212201）
