Wavelet transform-based satellite assembly impact test condition formulation system and method

A technology of wavelet transform and impact test, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of under-test, over-test, difficulty in accurately determining the power amplification factor, etc., and achieve the effect of good indication and good processing.

Active Publication Date: 2020-01-07
CHINA ACADEMY OF SPACE TECHNOLOGY
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Problems solved by technology

[0004] The technical problem solved by the present invention is: in view of the present prior art, the current application of shock response spectrum to characterize the shock test conditions of satellite components is likely to cause over-testing or under-testing, and proposes a satellite component shock test condition formulation based on wavelet transform The system and method solve the problem of inaccurate magnitude of test conditions caused by the difficulty in accurately determining the power amplification factor when formulating impact test conditions for satellite components

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  • Wavelet transform-based satellite assembly impact test condition formulation system and method
  • Wavelet transform-based satellite assembly impact test condition formulation system and method
  • Wavelet transform-based satellite assembly impact test condition formulation system and method

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Embodiment Construction

[0041] A system for formulating impact test conditions of satellite components based on wavelet transform, such as Figure 5 As shown, through the Haar continuous wavelet transform of the time-domain impact load, the impact test conditions are formulated according to the obtained wavelet coefficients. The functions of each module in the system are as follows: including the time-domain impact load measurement module, Haar wavelet analysis module, wavelet coefficient processing module, Test condition generation module, the specific functions are as follows:

[0042] Time-domain impact load measurement module: use the shock sensor to convert the acceleration response at the installation point of the satellite component into a load electrical signal, and process the load electrical signal into a time-domain impact load acceleration signal and then transmit it to the Haar wavelet analysis module, where:

[0043] Shock sensor: convert the acceleration response at the installation po...

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Abstract

The invention provides a wavelet transform-based satellite assembly impact test condition formulation system and method. Satellite assembly impact test conditions are formulated through Haar continuous wavelet transform, so that a transient unsteady state signal can be well processed and the actual impact load magnitude of a satellite assembly is accurately reflected. For the situation that an over-test or a short-test is easily caused when the satellite assembly impact test conditions are characterized by using an impact response spectrum at present, the problem of an inaccurate test condition magnitude due to the fact that it is difficult to accurately determine a dynamic amplification factor when the satellite assembly impact test conditions are formulated is solved.

Description

technical field [0001] The invention relates to a wavelet transform-based satellite component impact test condition formulation system and method, belonging to the field of spacecraft mechanics environment test. Background technique [0002] The spacecraft structure and payload may be damaged or failed in the pyroshock environment, which will affect or even terminate the space mission in advance. The impact load of pyrotechnics usually does not have a destructive effect on the main structure of the spacecraft, but it can cause damage to impact-sensitive components and equipment, such as high-sensitivity equipment and electronic products that are sensitive to high-frequency environments, and they will fail , light and thin structures, brittle materials will be damaged and so on. The pyrotechnic devices used on satellites can usually be divided into two categories: point source pyrotechnics and line source pyrotechnics. Among them, point source pyrotechnics directly assembled...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00
CPCG01N3/00G01N2203/005
Inventor 刘刚陈曦张程王跃宇李友遐
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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