Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/53543
Title: A new method for detecting line spectrum of ship-radiated noise based on a new double duffing oscillator differential system
Authors: Li, Guohui
Zhao, Ke
Yang, Hong
Keywords: Double duffing oscillator;Intermittent chaos;Ship-radiated noise;Unknown frequency detection
Issue Date: Jan-2020
Publisher: NISCAIR-CSIR, India
Abstract: In order to detect line spectrum of ship-radiated noise under the ocean background noise and improve the method of detecting duffing oscillator intermittent chaos, a method of detecting intermittent chaos based on variable step size dual duffing oscillator differential system is proposed. Based on the duffing oscillator, two independent and incompletely coupled duffing oscillators can be differentiated based on the differential principle by using the proposed method, which reduces the computational complexity and makes the timing diagram more intuitive. In order to further improve the detection efficiency and reduce the computational complexity of the system, the author put forward that a sequence of solving steps can be built by using only one duffing oscillator and the method of detecting the unknown frequency signal can be achieved by changing the step size of the system. Simulation results show that compared with the conventional duffing oscillator detection method, the proposed method has improved the SNR (signal-to-noise ratio) by at least 10.6 dB. Comparing with duffing system chaotic oscillator column and double duffing system chaotic oscillator column detection method, the proposed method is most effective in detecting line spectrum of ship-radiated noise.
Page(s): 34-43
URI: http://nopr.niscair.res.in/handle/123456789/53543
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.49(01) [January 2020]

Files in This Item:
File Description SizeFormat 
IJMS 49(1) 34-43.pdf1.21 MBAdobe PDFView/Open


Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.