The Method of Random Vibration Signal Transformation from Frequency to Time Domain Based on FIR Digit Filter

Jie Li; Jin Lu Pang; Xiao Yan Wang; Hai Lan; Zhi Yong Wang

doi:10.4028/www.scientific.net/AMR.479-481.1277

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 479-481The Method of Random Vibration Signal...

The Method of Random Vibration Signal Transformation from Frequency to Time Domain Based on FIR Digit Filter

Abstract:

Based on finite unit impulse response, FIR digit filter is designed according as the given power spectral density (PSD) characteristics beforehand. By controlling the parameters of filter, amplitude-phase characteristics that can meet completely the preconditions and demand is obtained. And then white noise is inputted to filter, random vibration time signal is generated. Moreover, the method of parameters analysis of AR autoregressive model is used to estimate and validate power spectrum of the gotten random vibration time domain signal. The result shows that the accuracy and error of PSD between AR model and the given function are within the range of the permitted value. And random vibration time signal obtained by using the redesigned FIR filter can meet absolutely the precision demand beforehand in the simulation and test.

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Periodical:

Advanced Materials Research (Volumes 479-481)

Pages:

1277-1282

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.479-481.1277

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Online since:

February 2012

Authors:

Jie Li, Jin Lu Pang, Xiao Yan Wang, Hai Lan, Zhi Yong Wang

Keywords:

Autoregressive AR Model, FIR Digit Filter, Random Vibration, Time Domain Signal

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