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Crosstalk eliminating vibration transfer path testing method

A technology of path testing and vibration transmission, applied in the direction of measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve problems such as crosstalk of reference response signals, analysis of crosstalk sources, errors, etc., and achieve the effect of easy implementation and high precision

Active Publication Date: 2018-07-10
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, there is crosstalk in the reference response signal representing the vibration source, such as image 3 Shown: The vibration response used to replace the vibration source not only comes from this source, but also from other sources, and crosstalk causes errors in source analysis

Method used

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  • Crosstalk eliminating vibration transfer path testing method
  • Crosstalk eliminating vibration transfer path testing method
  • Crosstalk eliminating vibration transfer path testing method

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Embodiment Construction

[0056] The present invention will be further described now in conjunction with accompanying drawing.

[0057] The vibration transmission path test method for eliminating crosstalk of the present invention solves the difficulty of the transfer function test by utilizing the reciprocity principle and the step-by-step operation method of adding virtual vibration source points. The generalized reference vector or the blocking force participates in the analysis of the transmission path of the working condition.

[0058] Method of the present invention specifically comprises the following steps:

[0059] Step 1. Obtain the de-crosstalk transfer matrix in the form of a measured transfer function or a non-orthogonal vector, and calculate the de-crosstalk generalized reference signal or the blocking force.

[0060] Specifically, it can be further divided into three situations, one is the situation where step-by-step operation is possible, the other is the case where step-by-step opera...

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Abstract

The invention relates to a crosstalk eliminating vibration transfer path testing method, which comprises the steps of obtaining a crosstalk removing transfer matrix by adopting the mode of a measurement transfer function or a non-orthogonal vector, and calculating a crosstalk removing generalized reference signal or a blocking force; analyzing an operating condition transfer path based on the generalized reference signal or the blocking force to obtain a transfer coefficient; and calculating the contribution of each vibration source at a response position according to the generalized referencesignal or the blocking force and the transfer coefficient.

Description

technical field [0001] The invention relates to a method for measuring and identifying a vibration source, in particular to a method for testing a vibration transmission path that eliminates crosstalk. Background technique [0002] Vibration of complex structures includes three parts: vibration source, vibration transmission path and vibration receiving structure. If certain technical means are used to find the main vibration source and transmission path, vibration reduction and noise reduction methods for the main vibration source and transmission path will be able to effectively reduce vibration. In terms of vibration and noise, the vibration and noise reduction methods used in non-critical parts will not play a major role. The premise of vibration and noise reduction is also the problem of transmission path analysis and identification of vibration source size. [0003] The transfer path analysis needs to remove the crosstalk excitation source, that is, remove the vibrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
Inventor 伍先俊
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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