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
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:
Assignee:
UNIV ZHEJIANG
International Classes:
B63H1/18; B63H5/07; G06N3/08
Attorney, Agent or Firm:
Koji Tsubouchi