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Wheel/rail friction control with feedback system detecting yaw moment of wheelset

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In the subway lines of Tokyo Metro, there are many tight curves that may cause squeal noise, excessive rail/wheel wear and also rail corrugation. To solve these serious problems, an onboard friction control system has been developed by the authors and has been equipped on some commercial trains [Y. Suda, H. Komine, T. Iwasa, M. Tomeoka, K. Matsumoto, N. Ubukata, M. Tanimoto, M. Nakata, and T. Nakai, Improvement of curving performance with friction control between wheel and rail, The 17th IAVSD Symposium Poster Session, Lyngby, Denmark, August, 2001; Y. Suda, H. Komine, T. Iwasa, T. Fujii, Tomeoka, K. Matsumoto, N. Ubukata, M. Tanimoto, M. Nakata, and T. Nakai, Experiment and analysis for improvement of curving performance with friction control between wheel and rail, Veh. Syst. Dynam. 41(Suppl.) (2004), pp. 507-516.]. With the system, in order to obtain the enough effect of friction control steadily, it is natural that an appropriate quantity of friction modifier should be required [K. Matsumoto, Y. Suda, T. Fujii, H. Komine, M. Tomeoka, Y. Sato, T. Nakai, M. Tanimoto, and Y. Kishimoto, The optimum design of an onboard friction control system between wheel and rail in a railway system for improved curving negotiation, Veh. Syst. Dynam. 44(Suppl.) (2006), pp. 531-540]. On such a viewpoint, the authors propose a new friction control system with the detection of yaw moment acting on the running wheelset. In this paper, first, outline of conventional feed-forward control system is introduced; secondly, the concept of feedback friction control system is presented considering the results of the multi-body dynamics simulations, and finally some field running test results of the developed system are discussed.
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Keywords: contact problem; control; curving negotiation; friction; railway

Document Type: Research Article

Affiliations: 1: The University of Tokyo, Tokyo, Japan,Rolling Stock Department, Tokyo Metro Co. Ltd, Tokyo, Japan 2: Rolling Stock Department, Tokyo Metro Co. Ltd, Tokyo, Japan 3: Center for Collaborative Research and Institute of Industrial Science, The University of Tokyo, Tokyo, Japan 4: Institute of Industrial Science, The University of Tokyo, Tokyo, Japan 5: Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology, Tokyo, Japan 6: Railway Bogie Truck Manufacturing Department, Sumitomo Metal Industries, Ltd, Osaka, Japan 7: Railway System Department, Sumitomo Metal Technology, Inc., Osaka, Japan

Publication date: 2008-09-01

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