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A method and device for active noise reduction in trains

An active noise reduction and train technology, which is applied to measurement devices, program control, instruments, etc., can solve the problems of not considering the relationship between the traction system and the unsatisfactory noise reduction effect, and achieve the effect of good noise reduction performance.

Active Publication Date: 2021-08-27
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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Problems solved by technology

The existing active noise reduction method only generates a noise reduction signal with an opposite phase to it through the environmental noise, without considering the relationship between the traction system and the noise, and the noise reduction effect on the noise of a specific frequency is not ideal

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  • A method and device for active noise reduction in trains
  • A method and device for active noise reduction in trains

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0037] Such as figure 1 As shown, the method for the train active noise reduction of the present embodiment includes: S1. Obtaining the environmental noise signal and obtaining the feedforward signal of the DCU; S2. Generating the active noise reduction signal according to the environmental noise signal; S3. The active noise reduction signal is corrected by feeding the signal; S4. Outputting the corrected active noise reduction signal. The active noise reduction signal is to process the environmental noise signal to generate a signal with the opposite phase and the same amplitude as the environmental noise signal. In the prior art, the active noise reduction signal is directly output through the speaker to offset the noise signal, so as to achieve the purpose o...

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Abstract

The invention discloses a method for active noise reduction of a train, comprising: S1. obtaining an environmental noise signal and a feedforward signal of a DCU; S2. generating an active noise reduction signal according to the environmental noise signal; S3. The signal corrects the active noise reduction signal; S4. Outputs the corrected active noise reduction signal. It has the advantages of fully considering the relationship between the traction system and the noise, and correcting the active noise reduction signal obtained from the environmental information through the spectrum information of the current and torque ripple of the traction motor, so that the noise reduction performance is better.

Description

technical field [0001] The invention relates to the technical field of noise reduction in train carriages, in particular to a method and device for active noise reduction in trains. Background technique [0002] With the increase of train speed and the increase of people's requirements for train comfort, the noise requirements in the compartment are getting higher and higher, which has become an important technical index of train performance. The high-performance traction control system can effectively reduce the noise in the cabin, but it cannot completely eliminate the noise generated by motor vibration and wheel-rail contact. In order to further reduce the noise in the cabin, some vibration and noise reduction technologies can be considered, mainly using new sound-absorbing, sound-insulating and shock-absorbing materials to start from four aspects: vibration isolation, vibration absorption, sound insulation and sound absorption. Compared with the above-mentioned traditio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042G01H17/00
CPCG01H17/00G05B19/042
Inventor 梅文庆刘勇吕永灿文宇良甘韦韦
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST