Noise reduction method and system for acoustic emission signal of robot
The invention discloses a noise reduction method and system for a robot acoustic emission signal, and the method comprises the steps: collecting the acoustic emission signal generated by a robot body, carrying out the wavelet denoising of the collected acoustic emission signal, selecting a proper wa...
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| creator | DONG SHISHANG CHENG ZI'AN TU JING LI MING YUAN XUECHAO |
| description | The invention discloses a noise reduction method and system for a robot acoustic emission signal, and the method comprises the steps: collecting the acoustic emission signal generated by a robot body, carrying out the wavelet denoising of the collected acoustic emission signal, selecting a proper wavelet function and threshold value, removing a noise component, extracting an effective signal of the robot body, and carrying out the preliminary reconstruction. Obtaining an acoustic emission signal h1 after preliminary noise reduction; eMD decomposition is carried out on the acoustic emission signal h1, and the signal is decomposed into a plurality of IMF components and a residual component RES; and respectively calculating a correlation coefficient and a variance contribution rate between each IMF component and the original signal, and reconstructing the IMF components to obtain a noise-reduced acoustic emission signal h2. According to the method, noise reduction processing is performed on the extracted acousti |
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Obtaining an acoustic emission signal h1 after preliminary noise reduction; eMD decomposition is carried out on the acoustic emission signal h1, and the signal is decomposed into a plurality of IMF components and a residual component RES; and respectively calculating a correlation coefficient and a variance contribution rate between each IMF component and the original signal, and reconstructing the IMF components to obtain a noise-reduced acoustic emission signal h2. 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Obtaining an acoustic emission signal h1 after preliminary noise reduction; eMD decomposition is carried out on the acoustic emission signal h1, and the signal is decomposed into a plurality of IMF components and a residual component RES; and respectively calculating a correlation coefficient and a variance contribution rate between each IMF component and the original signal, and reconstructing the IMF components to obtain a noise-reduced acoustic emission signal h2. 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| subjects | ACOUSTICS MUSICAL INSTRUMENTS PHYSICS SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION |
| title | Noise reduction method and system for acoustic emission signal of robot |
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