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B.V. Chennoju, M. Carnevale, C.E.A. Reyes, A. Collina, S. Bruni, "Experimental Investigation of the Correlation Between Contact Wire Gradient and Pantograph Accelerations", in J. Pombo, (Editor), "Proceedings of the Seventh International Conference on Railway Technology: Research, Development and Maintenance ", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 15, Paper 10.15, 2026, doi:10.4203/ccc.15.10.15

Keywords: condition monitoring, high speed train, pantograph-catenary dynamic characteristics, pantograph--overhead contact line, pantograph, overhead contact system.

Abstract

Condition assessment of overhead contact line (OCL) systems in electrified railways is traditionally based on geometric measurements such as contact wire height, gradient and stagger obtained from diagnostic vehicles. However, geometric measurements alone provide only a partial description of the dynamic quality of pantograph--OCL interaction. This paper investigates the relationship between OCL geometry and pantograph dynamic response using geo referenced measurements from in service trains and diagnostic vehicles. Pantograph accelerations are analysed using RMS indicators evaluated over 1~km spatial windows and short time windows of 200~ms. The OCL geometry is described using contact wire height and 5~m gradient with a sampling interval of 25~cm. The comparison is performed by spatially aligning the geometric and dynamic indicators and analysing their correspondence in different frequency bands. The results suggest that the contact wire gradient contributes to the pantograph acceleration response. However, a clear local correspondence between gradient and acceleration is observed only in selected regions, indicating that other infrastructure factors also influence the pantograph response. These findings show that pantograph based dynamic indicators can complement OCL measurements in the assessment of OCL condition.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 15 PROCEEDINGS OF THE SEVENTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 10.15 Experimental Investigation of the Correlation Between Contact Wire Gradient and Pantograph Accelerations B.V. Chennoju¹, M. Carnevale², C.E.A. Reyes¹, A. Collina¹ and S. Bruni¹ ¹Department of Mechanical Engineering, Politecnico di Milano, Italy ²Department of Ingegneria Industriale e dell'Informazione, University of Pavia, Italy doi:10.4203/ccc.15.10.15 Full Bibliographic Reference for this paper B.V. Chennoju, M. Carnevale, C.E.A. Reyes, A. Collina, S. Bruni, "Experimental Investigation of the Correlation Between Contact Wire Gradient and Pantograph Accelerations", in J. Pombo, (Editor), "Proceedings of the Seventh International Conference on Railway Technology: Research, Development and Maintenance ", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 15, Paper 10.15, 2026, doi:10.4203/ccc.15.10.15 Keywords: condition monitoring, high speed train, pantograph-catenary dynamic characteristics, pantograph--overhead contact line, pantograph, overhead contact system. Abstract Condition assessment of overhead contact line (OCL) systems in electrified railways is traditionally based on geometric measurements such as contact wire height, gradient and stagger obtained from diagnostic vehicles. However, geometric measurements alone provide only a partial description of the dynamic quality of pantograph--OCL interaction. This paper investigates the relationship between OCL geometry and pantograph dynamic response using geo referenced measurements from in service trains and diagnostic vehicles. Pantograph accelerations are analysed using RMS indicators evaluated over 1~km spatial windows and short time windows of 200~ms. The OCL geometry is described using contact wire height and 5~m gradient with a sampling interval of 25~cm. The comparison is performed by spatially aligning the geometric and dynamic indicators and analysing their correspondence in different frequency bands. The results suggest that the contact wire gradient contributes to the pantograph acceleration response. However, a clear local correspondence between gradient and acceleration is observed only in selected regions, indicating that other infrastructure factors also influence the pantograph response. These findings show that pantograph based dynamic indicators can complement OCL measurements in the assessment of OCL condition. download the full-text of this paper (PDF, 12 pages, 779 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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