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Paper Abstract and Keywords
Presentation 2025-05-16 10:35
Application of Discrete Laplace Transform in time response analysis.
Masashi Umeda, Seiya Kishimoto, Shinichiro Ohnuki (CST) EST2025-1
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, the dramatic improvement in computer performance has led to the design of electronic devices and electrical equipment using numerical analysis methods. In particular, transient response analysis of electromagnetic fields is used in the protective design of electrical equipment for electrical accidents and disasters caused by lightning surges, using FDTD (Finite Difference Time Domain) and equivalent circuit models. FILT (Fast Inverse Laplace Transform) method has been used for electromagnetic field analysis as one of the effective analysis methods for transient response analysis, and is a method to transform a function in the complex frequency domain into the time domain. Compared to the inverse Laplace transform, FILT method has the advantage of controllable computation accuracy. In the analysis using FILT method, the waveforms that can be mathematically obtained as functions in the time domain and complex frequency domain have been treated as incident waves or wave sources. However, even if real time waveforms of electrical signals or excitation pulses are obtained in actual measurements, it is sometimes difficult to express the waveforms in terms of mathematical functions. Therefore, when using transient response analysis by FILT method, it is necessary to approximate the waveform to an incident waveform for which a function in the complex frequency domain can be easily obtained and analysed. In this paper, discrete Laplace transform based on the poles of the approximated exponential function used in FILT method is proposed.
Keyword (in Japanese) (See Japanese page) 
(in English) Time Response Analysis / Fast Inverse Laplace Transform / Discrete Laplace Transform / Complex Frequency / Finite Difference Time Domain / Electromagnetic Field Analysis / Circuit Analysis / Lightning Surge  
Reference Info. IEICE Tech. Rep., vol. 125, no. 27, EST2025-1, pp. 1-6, May 2025.
Paper # EST2025-1 
Date of Issue 2025-05-09 (EST) 
ISSN 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 EST2025-1

Conference Information
Committee EST  
Conference Date 2025-05-16 - 2025-05-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Simulation techniques, etc. 
Paper Information
Registration To EST 
Conference Code 2025-05-EST 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Application of Discrete Laplace Transform in time response analysis. 
Sub Title (in English)  
Keyword(1) Time Response Analysis  
Keyword(2) Fast Inverse Laplace Transform  
Keyword(3) Discrete Laplace Transform  
Keyword(4) Complex Frequency  
Keyword(5) Finite Difference Time Domain  
Keyword(6) Electromagnetic Field Analysis  
Keyword(7) Circuit Analysis  
Keyword(8) Lightning Surge  
1st Author's Name Masashi Umeda  
1st Author's Affiliation Nihon University (CST)
2nd Author's Name Seiya Kishimoto  
2nd Author's Affiliation Nihon University (CST)
3rd Author's Name Shinichiro Ohnuki  
3rd Author's Affiliation Nihon University (CST)
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Speaker Author-1 
Date Time 2025-05-16 10:35:00 
Presentation Time 25 minutes 
Registration for EST 
Paper # EST2025-1 
Volume (vol) vol.125 
Number (no) no.27 
Page pp.1-6 
#Pages 6 
Date of Issue 2025-05-09 (EST) 

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