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Paper Abstract and Keywords
Presentation 2013-12-20 14:55
An Evaluating Method for Fundamental Dynamical Parameters of Objects on a Printed Circuit Board (3) -- Properties of the Responses using Rectangular Wave & Sinusoidal one as Input --
Shin-ichi Wada, Keiji Koshida, Hiroaki Kubota (TMC), Koichiro Sawa (NIT) EMD2013-133 Link to ES Tech. Rep. Archives: EMD2013-133
Abstract (in Japanese) (See Japanese page) 
(in English) Authors have designed and developed the mechanism which gives vibration to electrical contacts by transient force using hammering oscillation and they have analyzed the effects of micro-oscillating on contacts. They propose a simple, new, and practical evaluation method for the transient phenomena and for the degradation phenomena of electrical contacts. In this paper, they consider natural frequency among factors dominant to degradation of electrical contacts when the external force operates on the connector placed on the PCB, and discuss the characteristic between input and output during rectangular oscillation. First, they obtain the steady-state responses using theoretical inputs developed by Fourier series and the analytical outputs when input waveforms are sinusoidal and rectangular. Next, 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 input. Finally, it is shown that the time-sequential force, which is obtained by hammering oscillation mechanism, is approximated to delta function, and that impulsive response occurs by the force if the r value of rectangular waveform is smaller than 0.005. Therefore it is shown that there are the dynamical parameters to be evaluated and the process of the degradation phenomenon of electrical contacts to be analyzed.
Keyword (in Japanese) (See Japanese page) 
(in English) electrical contact / micro-oscillation / contact resistance / rectangular wave / sinusoidal wave / hammering oscillation mechanism / /  
Reference Info. IEICE Tech. Rep., vol. 113, no. 369, EMD2013-133, pp. 11-16, Dec. 2013.
Paper # EMD2013-133 
Date of Issue 2013-12-13 (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 EMD2013-133 Link to ES Tech. Rep. Archives: EMD2013-133

Conference Information
Committee EMD  
Conference Date 2013-12-20 - 2013-12-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMD 
Conference Code 2013-12-EMD 
Language Japanese 
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 (3) 
Sub Title (in English) Properties of the Responses using Rectangular Wave & Sinusoidal one as Input 
Keyword(1) electrical contact  
Keyword(2) micro-oscillation  
Keyword(3) contact resistance  
Keyword(4) rectangular wave  
Keyword(5) sinusoidal wave  
Keyword(6) hammering oscillation mechanism  
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 Hiroaki Kubota  
3rd Author's Affiliation TMC System Co. Ltd. (TMC)
4th Author's Name Koichiro Sawa  
4th Author's Affiliation Nippon Institute of Technology (NIT)
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Date Time 2013-12-20 14:55:00 
Presentation Time 25 
Registration for EMD 
Paper # IEICE-EMD2013-133 
Volume (vol) IEICE-113 
Number (no) no.369 
Page pp.11-16 
#Pages IEICE-6 
Date of Issue IEICE-EMD-2013-12-13 

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