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Title:
IDENTIFICATION METHOD FOR DEGREE OF PROPELLER CAVITATION BASED ON IDENTIFICATION OF CHARACTERISTIC PATTERN FOR PULSE FREQUENCY
Document Type and Number:
Japanese Patent JP2021041915
Kind Code:
A
Abstract:
To provide an identification method for degree of propeller cavitation.SOLUTION: An identification method for degree of propeller cavitation includes the steps for: collecting noise signals of a propeller in water; obtaining cycling density spectrum; averaging and constituting reinforcement envelope spectrum in logarithm coordinates; averaging a time region for improvement for source data; (5) obtaining a corresponding eigenmode function IMF; using a pulse frequency for differing cavitation states in constant error alarm rate detection statistics, an eigenmode function of differing ranks; and obtaining determination of a cavitation state after BP neural network training discrimination.SELECTED DRAWING: Figure 1

Inventors:
CHU NING
TONG WEIQI
WU DAZHUAN
CAO LINLIN
WU PENG
YANG SHUAI
HUANG BIN
QIN SHIJIE
LI SHIYANG
Application Number:
JP2020125982A
Publication Date:
March 18, 2021
Filing Date:
July 24, 2020
Export Citation:
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Assignee:
UNIV ZHEJIANG
International Classes:
B63H1/18; B63H5/07; G06N3/08
Attorney, Agent or Firm:
Koji Tsubouchi