Print Email Facebook Twitter Ensemble EMD-based automatic extraction of the catenary structure wavelength from the pantograph-catenary contact corce Title Ensemble EMD-based automatic extraction of the catenary structure wavelength from the pantograph-catenary contact corce Author Liu, Zhigang Wang, H. (TU Delft Railway Engineering) Dollevoet, R.P.B.J. (TU Delft Railway Engineering) Yang, S. (External organisation) Nunez, Alfredo (TU Delft Railway Engineering) Zhang, J. (External organisation) Date 2016 Abstract This paper explores the use of pantograph-catenary contact force (PCCF) for monitoring of the current collection quality and detection of anomalies in the interaction between pantograph and catenary. The concept of catenary structure wavelength (CSW) is proposed as the dominant component of PCCF. It describes the signal components caused by the cyclical catenary structure in span and inter-dropper distance. To obtain the CSWs and non-CSW residual of PCCF, an automatic extraction approach based on the ensemble empirical mode decomposition (EEMD) is proposed. In the approach, the instantaneous frequency of each intrinsic mode function generated by EEMD is employed for the extraction of CSWs. Some selected trials on the PCCF data from simulation and measurement are performed and indicate that the extraction approach is adaptive to the PCCF under various circumstances, including different operation speed, pantograph type and catenary structure. Analyses on the extracted CSWs and non-CSW residual show that, with certain tolerance against measurement noise, the approach can preserve intact the characterizations of current collection quality and make anomalies easier to detect. Subject Catenary structure wavelength (CSW)ensemble empirical mode decomposition (EEMD)extractionhigh-speed railway (HSR)intrinsic mode function (IMF)pantograph-catenary contact force (PCCF)Computational modelingForceFrequency-domain analysisRail transportationSea measurementsSuspensionsWires To reference this document use: http://resolver.tudelft.nl/uuid:3c216d07-8c4c-4d8a-8824-68afe249e7b0 DOI https://doi.org/10.1109/TIM.2016.2579360 ISSN 0018-9456 Source IEEE Transactions on Instrumentation and Measurement, 65 (10), 2272-2283 Part of collection Institutional Repository Document type journal article Rights © 2016 Zhigang Liu, H. Wang, R.P.B.J. Dollevoet, S. Yang, Alfredo Nunez, J. Zhang Files PDF Liu_et_al_IEEETInsMea_2_.pdf 1.66 MB Close viewer /islandora/object/uuid:3c216d07-8c4c-4d8a-8824-68afe249e7b0/datastream/OBJ/view