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A compensation method and device for balance dynamic characteristics based on wavelet reconstruction

A technology of dynamic characteristics and wavelet reconstruction, which is applied in the field of wind tunnel force measurement, can solve the problems of low reliability of balance force measurement results, reduce high-frequency signal interference, be easy to implement, and improve reliability.

Active Publication Date: 2022-03-01
中国空气动力研究与发展中心超高速空气动力研究所
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem in the prior art that the model vibration caused by the impact is not considered to affect the measurement, resulting in low reliability of the force measurement result of the balance

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  • A compensation method and device for balance dynamic characteristics based on wavelet reconstruction
  • A compensation method and device for balance dynamic characteristics based on wavelet reconstruction
  • A compensation method and device for balance dynamic characteristics based on wavelet reconstruction

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Embodiment Construction

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] Such as figure 1 As shown, a method for compensating dynamic characteristics of a balance based on wavelet reconstruction provided by an embodiment of the present invention includes the following steps:

[0037] S1. Install the model, balance and support rod used in the wind tunnel force test, and obtain the natural frequency f of the...

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Abstract

The invention relates to a method and device for compensating balance dynamic characteristics based on wavelet reconstruction. The method includes: installing a model, a balance and a support rod to obtain natural frequencies; One-way accelerometer; simulate the impact process under no wind conditions, obtain the force measurement signal output by the balance and one-way accelerometer, and calculate the dynamic characteristic compensation coefficients in the three directions respectively; conduct wind tunnel force test, impact model and obtain The force measurement data output by the balance and the one-way accelerometer; the wavelet decomposition is performed on the force measurement data output by the balance and the one-way accelerometer in three directions, and the natural frequency is used as the filter cut-off frequency for high-frequency filtering, and according to the corresponding The dynamic characteristic compensation coefficient performs dynamic characteristic compensation on the force measurement data output by the balance; calculates the aerodynamic force of the wind tunnel force measurement test. The invention can compensate the dynamic characteristics of the balance signal, improve the reliability of force measurement data, and has strong universality.

Description

technical field [0001] The invention relates to the technical field of wind tunnel force measurement tests, in particular to a method and device for compensating dynamic characteristics of a balance based on wavelet reconstruction. Background technique [0002] Balances used to measure strain force, such as six-component balances, rod balances, ring balances, box balances, etc., are important equipment in wind tunnel force tests. During the wind tunnel test, the balance is installed inside the model. When the model is impacted, the balance will vibrate and return to a stable state after a period of time. During this process, the force measurement data of the balance will be disturbed by the vibration. , seriously affecting the accuracy of test data. [0003] Therefore, in view of the above deficiencies, it is necessary to provide a technical solution capable of correcting the influence of the model oscillation caused by the impact on the force measurement of the balance in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/06G06F17/14
CPCG01M9/062G06F17/148
Inventor 张峻宾艾迪邱怀刘施然孙鹏林敬周许晓斌邹琼芬
Owner 中国空气动力研究与发展中心超高速空气动力研究所
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