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Random vibration test frequency band division hybrid control method

A technology of random vibration test and hybrid control, which is applied in vibration testing, testing of machine/structural components, measuring devices, etc., and can solve problems such as lack of hybrid control

Active Publication Date: 2021-03-05
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

In actual engineering applications, or because of the difference in the response of each part of the test piece, it is expected that the test piece will have different test effects in each frequency band during the test, especially for some important components, it is necessary to use limit control to avoid excessive mechanical stress on the product. damage, but the prior art does not have a method for mixing control

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  • Random vibration test frequency band division hybrid control method
  • Random vibration test frequency band division hybrid control method
  • Random vibration test frequency band division hybrid control method

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Embodiment Construction

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Such as figure 1 As shown, a random vibration test division segment mixing control method, including the following steps:

[0028] S1, according to the random vibration test conditions, use the reference spectrum G r (f) Generating time history is x 0 (t) low level driver signal for random vibration self-test test, excitation the test product;

[0029] S2, measure each control point response signal Y R (t), as an example of N control points and M limit control points, the response of n control points is Y R-C1 (t), y R-C2 (t), ..., y R-Cn (t), the response of M limit control points is Y R-L1 (t), y R-L2 (t), ..., y R-Lm (t);

[0030] S3,

[0031] A. According to the test control strategy, the divided frequency band control fragment is constructed. Each fragment is defined by high and low frequencies. Each frequency band is selected according to the requirements of the...

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Abstract

The invention discloses a random vibration test frequency band division hybrid control method, particularly to a frequency band division hybrid control method with limit control. The method can selectdifferent control modes to realize hybrid control in different frequency bands and comprehensively consider the response of a limit control point to perform balance correction on a driving signal, issuitable for a random vibration environment test, and comprises the following steps: obtaining a control response spectrum under hybrid control according to a frequency band division control segment,and obtaining a test system transfer function under the magnitude according to the prior art; comparing limit control point response with a limit target parameter to obtain a driving signal adjustment value; and finally, correcting the driving spectrum according to the driving signal adjustment value, and carrying out equalization correction until a test condition magnitude is reached.

Description

Technical field [0001] The present invention belongs to the field of digital signal processing, and more particularly to a random vibration test division segment mixing control method. Background technique [0002] Random vibration test As an effective means of simulating the vibration environment of the test product, it is an important phase of the development of vibration test. Different control methods have been formed in the development of the test technology, such as single-point control, multi-point control, etc., and different control methods can produce different test effects on the test parts. In actual engineering applications, or because of the differences in the response of each part of the test parts, the test parts have different trial effects in each frequency band, especially for some important components, need to avoid the ability of the product to be protected by strong mechanics stress Damage, but the prior art does not have a method of mixing control. [0003]...

Claims

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Application Information

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IPC IPC(8): G01M7/02
CPCG01M7/022
Inventor 代明香刘青林王东升田光明吴文杰彭磊李晓琳邓婷农绍宁胡勇赵怀耘杨翀朱学旺王宇飞周桐
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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