中南大学学报（自然科学版）2024，Vol.55Issue(5)：2023-2035,13.DOI:10.11817/j.issn.1672-7207.2024.05.032
基于空间域尺度自适应小波能量的接触网不规则识别
Recognition of irregularity catenary based on adaptive spatial domain scale wavelet energy
摘要
Abstract
Aiming at the verticle and transverse structure irregularity of catenary within the pantograph-catenary system of high-speed railways,based on the study of the influence of catenary irregularities on the pantograph's vibration response,a method for identifying irregularities in the catenary structure was proposed using spatial domain adaptive wavelet energy based on the pantograph's acceleration.The simulation and on-site measurements were conducted to validate the proposed method.Firstly,by employing a rigid-flexible coupled dynamic model of the pantograph,the vibration response of the pantograph at different contact positions was analyzed.The model accuracy was verified by establishing a rigid-flexible coupled dynamic model of the catenary and obtaining vibration signals on both sides of the pantograph based on standards and experimental data.Secondly,continuous wavelet transform was used for time-frequency analysis and spatial domain transformation of the signals.Scale parameters representing the wavelength of the catenary structure were adaptively extracted based on the energy distribution characteristics in the spatial domain.Finally,the average wavelet energy of the extracted scale parameters was used as a feature for fusion,enabling the identification of irregularities in the catenary.The results show that the proposed method can effectively detect irregularities in the catenary,such as vertical amplitudes exceeding 0.5 mm and lateral displacements of the locator from the collector head vibration signal.关键词
高速列车/受电弓-接触网系统/接触网不平顺/定位器偏离/小波能量/振动响应Key words
high speed train/pantograph-catenary system/contact wire irregularity/locator deviation/wavelet energy/vibration response分类
交通工程引用本文复制引用
李牧迪,周宁,程尧,孙翌,姜杭艳,支兴帅,张卫华..基于空间域尺度自适应小波能量的接触网不规则识别[J].中南大学学报（自然科学版）,2024,55(5):2023-2035,13.基金项目
国家自然科学基金资助项目(52072319) （52072319）
国家重点研发计划项目(2022YFB4301201-03) （2022YFB4301201-03）
西南交通大学轨道交通运载系统全国重点实验室自主课题(2023TPL-T05) （2023TPL-T05）
中国国家铁路集团有限公司科技研究开发计划项目(K2021J004-B)(Project(52072319)supported by the National Natural Science Foundation of China （K2021J004-B）
Project(2022YFB4301201-03)supported by the National Key Research and Development Program of China （2022YFB4301201-03）
Project(2023TPL-T05)supported by the Independent Project of State Key Laboratory of Rail Transit Vehicle System of Southwest Jiaotong Univeristy （2023TPL-T05）
Project(K2021J004-B)supported by the Research and Development of Science and Technology of the China National Railway Group Co.Ltd.) （K2021J004-B）
