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Separation identification method for electric drive power assembly system noise source

A technology for powertrain and system noise, which is applied in the field of noise source separation and identification of electric drive powertrain systems, can solve the problems such as the lack of convenience of noise source separation and identification methods, and achieves a reduced test cost, reduced workload, and high efficiency. Effect

Inactive Publication Date: 2019-01-15
JILIN UNIV
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Problems solved by technology

[0009] The invention provides a noise source separation and identification method for an electric drive powertrain system. The noise source of the electric drive powertrain is separated and identified through computer blind source separation and identification technology, and the noise source of the electric drive powertrain can be separated and identified without dismantling at the minimum cost. The identification process of its noise source signal solves the lack of convenience of the noise source separation and identification method of the existing electric drive powertrain system

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  • Separation identification method for electric drive power assembly system noise source
  • Separation identification method for electric drive power assembly system noise source
  • Separation identification method for electric drive power assembly system noise source

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Embodiment Construction

[0048] refer to figure 1 , a noise source separation and identification method for an electric drive powertrain system, the method includes the following steps:

[0049] Step 1, signal acquisition stage;

[0050] Before the entire data acquisition system starts working, first set the position of each sensor, the specific position reference figure 2. The significance of measuring point layout is to reduce the near-field effect of the measuring point, so the measuring point is arranged 1m away from the body surface, and the distance between the two microphones is 8cm to simulate the human ear under the real conditions. That is to arrange the dual-channel sensor to the required position; secondly, calibrate each sensor to reduce its sensor error, and finally, after the powertrain system runs stably, start to collect the data, and send the collected signal to the preprocessing stage ;

[0051] The acquisition process should meet certain requirements, and at the same time sele...

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Abstract

The invention belongs to the technical field of automobiles, and particularly relates to a separation identification method of electric drive power assembly system noise source. The method comprisingthe following steps of: step 1, a signal acquisition stage; step 2, a pretreatment stage; step 3, a separation stage; step 4, a merging stage; step 5, an identifying stage. The invention is a separation identification method of electric drive power assembly system noise source, and carrying out the research on separating and identifying the electric drive power assembly noise source through a computer blind source separation identification technology, so that implementing the identification process of the noise source signal at the minimal cost in the unaddressed case, and solving the problemthat the separation identification method of electric drive power assembly system noise source is insufficient in convenience, and meanwhile, applying the part of the psychoacoustic theory, so that the separation identification result is more consistent with the objective practical.

Description

technical field [0001] The invention belongs to the technical field of automobiles, in particular to a noise source separation and identification method for an electric drive powertrain system. Background technique [0002] With the vigorous development of the modern automobile industry and the transportation industry, the noise generated by automobiles has gradually become one of the most important noise sources in contemporary cities, which will have a very serious impact on the daily study, life and health of people of different ages. , the noise generated by automobiles is called "the new urban nuisance". [0003] With the increasing global energy crisis and environmental pollution, major automobile manufacturers and scientific research institutes in the world have shifted their research focus to energy-saving and environment-friendly electric vehicle technology. Due to its many characteristics such as zero carbon dioxide emissions, miniaturization, and low noise, the d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/00G01H17/00
CPCG01H17/00G01M15/00
Inventor 冷智鑫贾士政李鑫赵靖华高炳钊
Owner JILIN UNIV
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