Construction method of ship radiation noise data set
A technology of noise data and radiation noise, which is applied in the field of ship radiation noise data set construction, can solve the problem of scarcity of ship radiation noise samples, and achieve the effect of overcoming the scarcity of samples
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specific Embodiment approach 1
[0017] Embodiment 1. A method for constructing a ship radiation noise data set described in this embodiment, the method specifically includes the following steps:
[0018] Step 1. Establishing a mathematical model of the actually collected ocean noise data, using the established mathematical model to simulate the simulated ship noise data, and using the set of the actually collected ocean noise data and the simulated ship noise data as the original data set;
[0019] Both the actual ocean noise data and the simulated ship noise data are sound files in the original data set;
[0020] Use the LSTM and CNN network to extract the features of the sound file, and verify the accuracy and missing rate of the obtained audio to detect the accuracy of the original data set; the specific process is:
[0021] (1) The first is audio feature extraction. Feature extraction mainly includes four parts, namely the number of channels, audio sampling size, audio sampling rate and total frame numbe...
specific Embodiment approach 2
[0028] Specific embodiment two, the difference between this embodiment and specific embodiment one is: the mathematical model of the actual mining ocean noise data is:
[0029] S(t)=1+[G(t)]×S x (t)+S l (t) (1)
[0030] In the formula: S(t) is the actual ocean noise data, G(t) is the modulation signal, S x (t) is the time-domain waveform of the continuum component, S l (t) is the time-domain waveform of the line spectrum component.
[0031] Other steps and parameters are the same as those in Embodiment 1.
[0032] According to the ship noise continuum characteristics and line spectrum statistical law, modeling and analysis are carried out respectively.
specific Embodiment approach 3
[0033] Specific embodiment three, this embodiment is different from one of the specific embodiments one or two in that: the described mathematical model is used to simulate the simulated ship noise data, and its specific process is:
[0034] Step 11: spectral peak frequency f 0 Affected by factors such as ship target speed, voyage depth, displacement, propeller size, water pressure, etc.; among them, Ross proposed the spectral peak frequency f 0 The empirical formula for the relationship with the target working condition is:
[0035]
[0036] Among them, B represents the number of propeller blades, σ represents the number of cavitation cells, and P 0 Represents hydrostatic pressure, ρ represents density, "~" represents related to these parameters;
[0037] Step 1 and 2: Assume hydrostatic pressure P 0 constant, the density ρ is:
[0038]
[0039] Among them, v is the target speed, H is the flight depth, J p is the running speed coefficient;
[0040] Step 13: Substi...
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