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A. Posseckert, D. Lüdicke, "Ride comfort improvements in switches using active secondary suspension with preview", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 34.2, 2022, doi:10.4203/ccc.1.34.2

Keywords: active secondary suspension, preview control, ride comfort, multibody simulation, lateral suspension, hold-off device.

Abstract

Trains often have to change their track when entering or leaving a station. This represents a challenging scenario related to passenger ride comfort due to small curve radii in switches. The abrupt change of curvature usually results in a bumpstop contact in the secondary suspension. The paper presents a control strategy with preview information based on stored track data. For this purpose, a calculation method is introduced to determine forces and torques acting on the carbody, e.g. when passing switches in advance. This data can be used by an active lateral secondary suspension in order to prevent bumpstop contact. Corresponding multibody simulations showed promising results. Peak values of lateral acceleration acting on the passengers can be reduced significantly resulting in better ride comfort.

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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: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 34.2 Ride comfort improvements in switches using active secondary suspension with preview A. Posseckert and D. Lüdicke Institute of System Dynamics and Control, German Aerospace Center, Oberpfaffenhofen, Germany doi:10.4203/ccc.1.34.2 Full Bibliographic Reference for this paper A. Posseckert, D. Lüdicke, "Ride comfort improvements in switches using active secondary suspension with preview", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 34.2, 2022, doi:10.4203/ccc.1.34.2 Keywords: active secondary suspension, preview control, ride comfort, multibody simulation, lateral suspension, hold-off device. Abstract Trains often have to change their track when entering or leaving a station. This represents a challenging scenario related to passenger ride comfort due to small curve radii in switches. The abrupt change of curvature usually results in a bumpstop contact in the secondary suspension. The paper presents a control strategy with preview information based on stored track data. For this purpose, a calculation method is introduced to determine forces and torques acting on the carbody, e.g. when passing switches in advance. This data can be used by an active lateral secondary suspension in order to prevent bumpstop contact. Corresponding multibody simulations showed promising results. Peak values of lateral acceleration acting on the passengers can be reduced significantly resulting in better ride comfort. download the full-text of this paper (PDF, 6 pages, 306 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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