A Genetic Algorithm Based Shock Response Spectrum Time Domain Waveform Matching Method
A technology of shock response spectrum and shock waveform, which is applied in the field of time-domain waveform matching of shock response spectrum based on genetic algorithm, can solve the problems that it is difficult to select waveform parameters, shock response spectrum conforms to the specification, and there are no wavelet parameters.
Active Publication Date: 2020-04-14
嘉兴亿恒测试技术有限公司
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Problems solved by technology
[0003] However, in the time-domain waveform matching of the traditional wavelet synthesis method, there is no standard guideline for the selection of wavelet parameters, which makes it difficult to select reasonable waveform parameters to make the shock response spectrum conform to the specification and make the amplitude of the time-domain shock waveform Meets shaker output limits
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Embodiment
[0032] Embodiment: A genetic algorithm-based shock response spectrum time-domain waveform matching method, using weight coefficients to limit the amplitude of the time-domain shock waveform s 1 and the shock response spectrum error s 2 The optimal combination of the fitness function of the two objectives is converted into a single objective fitness function, and the genetic algorithm is used to calculate the wavelet amplitude A in the traditional wavelet synthesis method i , wavelet delay time τ i and the number of half sine waves N i Three parameters, specifically:
[0033] (1) Establish the mathematical model of the traditional wavelet synthesis method
[0034] Superimpose a series of windowed sine waves with different frequencies and phases as the acceleration shock waveform which is
[0035]
[0036] In formula ①, A i Indicates the sub-wave amplitude, f i Indicates the wavelet frequency, τ i Indicates wavelet delay time, N i Indicates the number of half sine w...
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A time-domain waveform matching method of shock response spectrum based on a genetic algorithm, which uses a weight coefficient to limit the amplitude of the time-domain shock waveform s 1 and the shock response spectrum error s 2 The optimal combination of the fitness function of the two objectives is converted into a single objective fitness function, and the genetic algorithm is used to calculate the wavelet amplitude A in the traditional wavelet synthesis method i , wavelet delay time τ i and the number of half sine waves N i Three parameters. The invention solves the problem that the shock response spectrum time-domain matching wavelet parameters are difficult to determine in the traditional wavelet synthesis method, and simplifies the operation process in the genetic algorithm by converting the multi-objective fitness function optimization combination into a single-objective fitness function. According to the given shock response spectrum specification, the appropriate wavelet parameters are obtained to meet the test requirements.
Description
technical field [0001] The invention belongs to the technical field of environmental vibration tests, and in particular relates to a time-domain waveform matching method of a shock response spectrum based on a genetic algorithm. Background technique [0002] Environmental vibration test technology is a test method that simulates the environmental vibration of products under field or laboratory conditions. It plays an important guiding role in testing product reliability, estimating product life, and discovering weak links in product design. Shock load is a type of load commonly borne by various products during production, transportation and use, and has a huge impact on product performance. Shock test is a kind of environmental vibration test. Its purpose is to determine the environmental adaptability, structural integrity and shock resistance of products under non-repetitive mechanical shock loads during production, transportation and use. Shock tests mainly include classi...
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IPC IPC(8): G06K9/00G06N3/12
CPCG06N3/126G06F2218/12
Inventor 杨亮东刘金鑫徐本其
Owner 嘉兴亿恒测试技术有限公司