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| Presentation | 2017-11-17 10:30 A Method for Evaluating Degradation Phenomenon of Electrical Contacts using a Micro-Sliding Mechanism -- Minimal Sliding Amplitudes against Input Waveforms (3) -- Shin-ichi Wada, Keiji Koshida (TMC), Koichiro Sawa (Nippon Inst. of Tech.)  EMD2017-44 Link to ES Tech. Rep. Archives: EMD2017-44 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The authors obtaine experimental results on the minimal sliding amplitude (MSA) required to make resistances fluctuate on electrical contacts under various conditions. First, it is obtained that there is each minimal sliding amplitude (MS A) for each duty ratio of rectangular or impulsive input waveform and for each frictional force. The duty ratios are 0.5, 0.2, 0.04, 0.0075, 0.0064, 0.00152, and 0.0012. The frictional forces are 1.6, 1.0, and 1.6 N/pin. Second, by the thoretical model and methods in previous papers, natural angular frecuency (= 11800 s-1), damping ratio (= 0.067), and rising and falling time Ts of the MSM are obtained using MSA. Third, by !0, natural time T0 (= 532.2 s) is obtained. Using T0 and sliding period T (= 0.25 s), ratio R (= 0.0010644) is also obtained. Forth, comparing duty ratio with ratio R, it is considered that the ringing after rising time and the ringing after falling time are constructive, or destructive. Fifth, by experimental results after statistical processing, it is also considered what the relationship between minimal sliding amplitude and is. Finally, when flat time Tc is zero, it is thought what that the relationship between tau and Ts is. It is clear that it is not necessary for searching natural frequency of objects to use high-frequent and many waveforms for input. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | electrical contact / micro-sliding mechanism / frictional force / minimal sliding amplitude / input waveform / rising or falling time / flat time / | |
| Reference Info. | IEICE Tech. Rep., vol. 117, no. 312, EMD2017-44, pp. 7-12, Nov. 2017. | |
| Paper # | EMD2017-44 | |
| Date of Issue | 2017-11-10 (EMD) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | EMD2017-44 Link to ES Tech. Rep. Archives: EMD2017-44 |
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| Conference Information | |
| Committee | EMD |
| Conference Date | 2017-11-17 - 2017-11-17 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | The University of Electro-Communications |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | International Session IS-EMD2017 |
| Paper Information | |
| Registration To | EMD |
| Conference Code | 2017-11-EMD |
| Language | English |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Method for Evaluating Degradation Phenomenon of Electrical Contacts using a Micro-Sliding Mechanism |
| Sub Title (in English) | Minimal Sliding Amplitudes against Input Waveforms (3) |
| Keyword(1) | electrical contact |
| Keyword(2) | micro-sliding mechanism |
| Keyword(3) | frictional force |
| Keyword(4) | minimal sliding amplitude |
| Keyword(5) | input waveform |
| Keyword(6) | rising or falling time |
| Keyword(7) | flat time |
| Keyword(8) | |
| 1st Author's Name | Shin-ichi Wada |
| 1st Author's Affiliation | TMC System Co. Ltd. (TMC) |
| 2nd Author's Name | Keiji Koshida |
| 2nd Author's Affiliation | TMC System Co. Ltd. (TMC) |
| 3rd Author's Name | Koichiro Sawa |
| 3rd Author's Affiliation | Nippon Institute of Technology (Nippon Inst. of Tech.) |
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| Speaker | Author-1 |
| Date Time | 2017-11-17 10:30:00 |
| Presentation Time | 25 minutes |
| Registration for | EMD |
| Paper # | EMD2017-44 |
| Volume (vol) | vol.117 |
| Number (no) | no.312 |
| Page | pp.7-12 |
| #Pages | 6 |
| Date of Issue | 2017-11-10 (EMD) |
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