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Paper Abstract and Keywords
Presentation 2018-03-13 13:50
Demodulation method of chaotic vortex detection signal of vortex flow meter -- Synchronize chaotic application in coupled van der Pol equation --
Masataka Iwai
Abstract (in Japanese) (See Japanese page) 
(in English) In a vortex flowmeter which widely used in industrial plants, nonlinear phenomena such as frequency entrainments, jump phenomena and chaos may occur due to fluid pulsation by a rotating machine such as a pump,
and may cause an unexpected damage. In this report, we show that a coupled van der Pol equation system can be used as a filter for the chaos generated by the vortex detection signal of the vortex flowmeter and can be demodulated to the correct frequency by frequency entrainments. For the vortex detection signal of the vortex flowmeter model represented by the van der Pol equation, we show that the correct frequency of the vortex detection signal can be demodulated by obtaining the adjustment parameter condition of the coupled van der Pol equation using the describing functions. We simulate the proposed method of the model and apply this method for the vortex detection signal data of the actual vortex flowmeter. We show that the chaotic vortex detection signal can be demodulated to the correct frequency.
Keyword (in Japanese) (See Japanese page) 
(in English) Vortex flowmeter / Chaos / Frequency entrainment / Describing function / Van der Pol equation / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 505, NLP2017-107, pp. 31-35, March 2018.
Paper # NLP2017-107 
Date of Issue 2018-03-06 (NLP) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee MSS NLP  
Conference Date 2018-03-12 - 2018-03-14 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To NLP 
Conference Code 2018-03-MSS-NLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Demodulation method of chaotic vortex detection signal of vortex flow meter 
Sub Title (in English) Synchronize chaotic application in coupled van der Pol equation 
Keyword(1) Vortex flowmeter  
Keyword(2) Chaos  
Keyword(3) Frequency entrainment  
Keyword(4) Describing function  
Keyword(5) Van der Pol equation  
1st Author's Name Masataka Iwai  
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Date Time 2018-03-13 13:50:00 
Presentation Time 25 
Registration for NLP 
Paper # IEICE-NLP2017-107 
Volume (vol) IEICE-117 
Number (no) no.505 
Page pp.31-35 
#Pages IEICE-5 
Date of Issue IEICE-NLP-2018-03-06 

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