The Method and Conditions for Completing Soft Coupling of Two Separate Train Sets in Motion

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  • Kakuhama Fumitaka
    Electric Railway System Labs., Electrical & Electronic Engineering, Kogakuin University
  • Takagi Ryo
    Electric Railway System Labs., Electrical & Electronic Engineering, Kogakuin University

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  • 2編成を走行中にソフト連結状態へ移行させる方法に関する検討
  • 2 ヘンセイ オ ソウコウ チュウ ニ ソフト レンケツ ジョウタイ エ イコウ サセル ホウホウ ニ カンスル ケントウ

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Abstract

<p>Soft coupling is a conceptual system in which two or more train sets on the same railway track can run like one long mechanically coupled train set, with very little space between the adjacent train sets. It is expected to open up possibilities for the realization of highly flexible and improved rail services. However, it is known to be very difficult for two separate train sets in motion to complete soft coupling, i.e., for the distance between these train sets to become zero. In the method we proposed in our previous papers, the time required for the completion may be infinite, because the train set that follows another must run faster when approaching the train set in front. This paper focuses on the method of completing soft coupling within finite time. We show that such a method can be proposed under the following set of preconditions: (1) infrastructure enabling the removal of the conservative safety concept of railway signalling called `brick wall' assumption, (2) simultaneous control of two train sets through a very secure wireless communications link, and (3) high-accuracy control of the deceleration of train sets.</p>

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