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Keywords: independently rotating wheels, self-steering ability, running stability, curving performance, negative tread wheel conicity, oblique rotation axles.

Summary

Although independently rotating wheels (IRWs) enable construction of low floor vehicles, they do not have the self-steering ability in the conventional design. IRWs with negative wheel tread conicity (negative tread IRWs) are proposed as a design method of IRWs to achieve self-steering ability. Negative tread IRWs exert excellent curving performance. On the other hand, the occurrence of unstable oscillation such as the hunting oscillation has also been confirmed. It has been clear that the cause of the unstable oscillation is a change of rotation wheel radius resulting from negative wheel tread conicity. In order to resolve the problem of the negative tread IRWs, IRWs with oblique rotation axles (oblique axle IRWs) are also proposed. In oblique axle IRWs, right and left wheels have oblique rotation axes, respectively. In addition, the wheel profile in oblique axle IRWs is nearly cylindrical. Occurrence of the unstable oscillation is reduced by making the tread gradient low. At the same time, the self-steering ability is obtained as high as the negative tread IRWs. As stated above, although various design methods of IRWs have been proposed, their running abilities have never been mentioned comprehensively. In this paper, curving performance and running stability of the proposed IRWs are compared and summarized.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 110 PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 94 Analysis of the Running Ability of Independently Rotating Wheels K. Ejiri¹, Y. Michitsuji², Y. Suda¹ and S. Lin¹ ¹Institute of Industrial Science, The University of Tokyo, Japan ²Department of Mechanical Engineering, Ibaraki University, Japan doi:10.4203/ccp.110.94 purchase the full-text of this paper Full Bibliographic Reference for this paper K. Ejiri, Y. Michitsuji, Y. Suda, S. Lin, "Analysis of the Running Ability of Independently Rotating Wheels", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 94, 2016. doi:10.4203/ccp.110.94 Keywords: independently rotating wheels, self-steering ability, running stability, curving performance, negative tread wheel conicity, oblique rotation axles. Summary Although independently rotating wheels (IRWs) enable construction of low floor vehicles, they do not have the self-steering ability in the conventional design. IRWs with negative wheel tread conicity (negative tread IRWs) are proposed as a design method of IRWs to achieve self-steering ability. Negative tread IRWs exert excellent curving performance. On the other hand, the occurrence of unstable oscillation such as the hunting oscillation has also been confirmed. It has been clear that the cause of the unstable oscillation is a change of rotation wheel radius resulting from negative wheel tread conicity. In order to resolve the problem of the negative tread IRWs, IRWs with oblique rotation axles (oblique axle IRWs) are also proposed. In oblique axle IRWs, right and left wheels have oblique rotation axes, respectively. In addition, the wheel profile in oblique axle IRWs is nearly cylindrical. Occurrence of the unstable oscillation is reduced by making the tread gradient low. At the same time, the self-steering ability is obtained as high as the negative tread IRWs. As stated above, although various design methods of IRWs have been proposed, their running abilities have never been mentioned comprehensively. In this paper, curving performance and running stability of the proposed IRWs are compared and summarized. purchase the full-text of this paper (price £22) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £85 +P&P)
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