首页|基于空间域尺度自适应小波能量的接触网不规则识别

基于空间域尺度自适应小波能量的接触网不规则识别

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  • 国家科技期刊平台
  • NETL
  • NSTL
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针对高速铁路受电弓-接触网系统中出现的接触网垂向和横向结构不规则问题,在研究接触网不规则对受电弓振动响应影响的基础上,提出一种基于弓头加速度的空间域尺度自适应小波能量识别接触网结构不规则的方法,并开展仿真和现场实测验证.首先,建立受电弓刚柔耦合动力学模型,对不同接触位置下的弓头振动响应进行分析,并建立弓网刚柔耦合动力学模型获取弓头加速度信号,根据标准和实验结果验证模型的准确性;其次,利用连续小波变换对信号时频分析并进行空间域转换,基于空间域中的能量分布特征自适应提取表征接触网不规则的尺度参数;最后,提取尺度参数下的平均小波能量作为特征分量进行融合,实现接触网不规则识别.研究结果表明:本文所提方法能够有效地从弓头振动信号中同时检测出接触网垂向幅值大于0.5 mm的不平顺以及横向定位器偏离故障.
Recognition of irregularity catenary based on adaptive spatial domain scale wavelet energy
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.

high speed trainpantograph-catenary systemcontact wire irregularitylocator deviationwavelet energyvibration response

李牧迪、周宁、程尧、孙翌、姜杭艳、支兴帅、张卫华

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西南交通大学轨道交通运载系统全国重点实验室,四川成都,610031

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

国家自然科学基金国家重点研发计划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中国国家铁路集团有限公司科技研发计划

520723192022YFB4301201-032023TPL-T05K2021J004-B

2024

10.11817/j.issn.1672-7207.2024.05.032

中南大学学报(自然科学版)
中南大学

中南大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.938
ISSN：1672-7207
年,卷(期)：2024.55(5)
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