MATEC Web Conf.
Volume 336, 20212020 2nd International Conference on Computer Science Communication and Network Security (CSCNS2020)
|Number of page(s)||9|
|Section||Industrial Design and Engineering Technology|
|Published online||15 February 2021|
Propeller feature extraction of UUVs study based on CEEMD combined with symmetric correlation
1 Systems Engineering Research Institute, Fengxian east road No.1, Haidian district, Beijing, China
2 Science and Technology on Underwater Acoustic Antagonizing Laboratory, Fengxian east road No.1, Haidian district, Beijing, China
* Corresponding author: email@example.com
In this paper, in view of the characteristic that UUV radiation noise is low and easily interfered by strong noise, the complementary Ensemble Empirical Mode Decomposition (CEEMD) combined with symmetric correlation processing is proposed, which can improve the extraction performance of UUV’s propeller features. First, the CEEMD decomposition combined with symmetric correlation processing was used to reduce the radiated noise of the target, then the signals after the noise reduction were demodulated and computed to obtain the DEMON spectrum, and finally features such as the rotational speed of the UUV’s propeller were extracted from the DEMON spectrum. The Sea trials signal processing results prove that the method has better noise suppression performance under low SNR conditions, and can clearly and comprehensively extract the DEMON information of the radiated noise, and then accurately extract the propeller features of the UUV. Compared to conventional demodulation techniques, this technique has a greater ability to suppress noise and does not require manual selection of the modulated frequency band.
© The Authors, published by EDP Sciences, 2021
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