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Paper Abstract and Keywords
Presentation 2014-11-30 14:55
An Evaluating Method for Fundamental Dynamical Parameters of Objects on a Printed Circuit Board (6) -- The effect by application time of external force --
Shin-ichi Wada, Keiji Koshida, Hiroaki Kubota (TMC System), Koichiro Sawa (Nippon Inst. of Tech.) EMD2014-91 Link to ES Tech. Rep. Archives: EMD2014-91
Abstract (in Japanese) (See Japanese page) 
(in English) Authors have studied the degradation phenomenon of electrical contact under the influences of an external micro-oscillation. They have developed a mechanism which supplies damped vibration to electrical contacts by periodical hammering-oscillations (HOM). And they have also developed another mechanism which gives reciprocal micro-sliding to electrical contacts driven by a magmetostrictive actuator (MSM1). It is shown that each mechanism is able to simulate an actual degradation phenomenon on electrical contacts under the influence of micro-oscillation.
In this paper, they analyse the transient response and steady-state one using theoretical inputs developed by Fourier series and the analytical outputs when input waveform is sinusoidal, rectangular, or quasi-impulsive. Following the characteristics of input waveform, the kinetic nature of the system has the effects on the output waveform which are remarkable in case of rectangular or quasi-impulsive input. If the input is quasi-impulsive one whose application time is finite but very short and the value r is smaller than 0.005, it is shown that there are characteristics of input waveform and output one.
In addition, they analyse the mechanism of collision between oscillating objects and oscillated ones theoretically and experimentally the characteristics. Loads, impulses, and accelerations in oscillating are almost in proportion to the initial heights of the oscillating objects. On the other hand, the duration times of contact are most in proportion to the weights of the oscillating objects. And it is indicated that the applied impulse is constant on the oscillation by the hammering oscillation mechanism (HOM).
Keyword (in Japanese) (See Japanese page) 
(in English) electrical contact / micro-oscillation / Fourier analysis / collision mechanism / load / duration time / impulse /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 342, EMD2014-91, pp. 149-154, Nov. 2014.
Paper # EMD2014-91 
Date of Issue 2014-11-22 (EMD) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 EMD2014-91 Link to ES Tech. Rep. Archives: EMD2014-91

Conference Information
Committee EMD  
Conference Date 2014-11-29 - 2014-11-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Chitose Cultural Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) International Session IS-EMD2014 
Paper Information
Registration To EMD 
Conference Code 2014-11-EMD 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An Evaluating Method for Fundamental Dynamical Parameters of Objects on a Printed Circuit Board (6) 
Sub Title (in English) The effect by application time of external force 
Keyword(1) electrical contact  
Keyword(2) micro-oscillation  
Keyword(3) Fourier analysis  
Keyword(4) collision mechanism  
Keyword(5) load  
Keyword(6) duration time  
Keyword(7) impulse  
1st Author's Name Shin-ichi Wada  
1st Author's Affiliation TMC System Co. Ltd. (TMC System)
2nd Author's Name Keiji Koshida  
2nd Author's Affiliation TMC System Co. Ltd. (TMC System)
3rd Author's Name Hiroaki Kubota  
3rd Author's Affiliation TMC System Co. Ltd. (TMC System)
4th Author's Name Koichiro Sawa  
4th Author's Affiliation Nippon Institute of Technology (Nippon Inst. of Tech.)
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Speaker Author-1 
Date Time 2014-11-30 14:55:00 
Presentation Time 20 minutes 
Registration for EMD 
Paper # EMD2014-91 
Volume (vol) vol.114 
Number (no) no.342 
Page pp.149-154 
Date of Issue 2014-11-22 (EMD) 

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