GB/T 29716.3-2021Mechanical vibration and shock - Signal processing - Part 3: Methods of time-frequency analysis (English PDF)
机械振动与冲击 信号处理 第3部分：时频分析方法
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Issued by
State Administration for Market Regulation, China National Standardization Administration
Level / Type
National · Recommended
Issue date
May 21, 2021
Implementation date
December 1, 2021
Scope
GB/T 29716.3-2021 is the English-translated version of 机械振动与冲击 信号处理 第3部分：时频分析方法.
GB/T 29716.3-2021 is the Chinese standard "Mechanical vibration and shock - Signal processing - Part 3: Methods of time-frequency analysis".
Its scope clause reads: This part of GB/T 29716 specifies the sampling measurement of a given physical or engineering quantity (such as acceleration, force or displacement) over a period of time Numerical calculation method for time-frequency analysis.
Several mathematical formulas of time-frequency transformation are given, and requirements and suggestions are put forward for parameter recording. The data can be obtained through the experimental measurement of the mechanical structure, and can also be obtained from the numerical simulation of the mechanical structure.
Due to the variety of mechanical structures Such as microscopic instruments, musical instruments, automobiles, processing machines, buildings and civil structures, etc., so the types of data involved are very wide. by These data can determine the response of a machine or human body to mechanical vibrations and shocks. Its clauses include terms and definitions.
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Document preview — GB/T 29716.3-2021
National Standard of the People's Republic of China
- Classification
- J 04
Issued by: State Administration for Market Regulation, China National Standardization Administration
Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbol
- 5 Time-frequency transformation
- 5.1 Short-time Fourier Transform
- 5.2 Generalized Wigner-Wille distribution
- 5.3 Wavelet Transform
- Appendix A (informative appendix) Gear failure analysis based on Wigner distribution
1 Scope
This part of GB/T 29716 specifies the sampling measurement of a given physical or engineering quantity (such as acceleration, force or displacement) over a period of time
Numerical calculation method for time-frequency analysis. Several mathematical formulas of time-frequency transformation are given, and requirements and suggestions are put forward for parameter recording.
The data can be obtained through the experimental measurement of the mechanical structure, and can also be obtained from the numerical simulation of the mechanical structure. Due to the variety of mechanical structures
Such as microscopic instruments, musical instruments, automobiles, processing machines, buildings and civil structures, etc., so the types of data involved are very wide. by
These data can determine the response of a machine or human body to mechanical vibrations and shocks.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
For all undated reference documents, the latest version (including all amendments) is applicable to this document.
ISO 2041 Mechanical vibration, shock and condition monitoring vocabulary (Mechanicalvibration, shockandconditionmonito- ring-Vocabulary)
ISO 18431-1 Mechanical vibration and shock signal processing Part 1.Introduction (Mechanical vibration and shock-
Signalprocessing-Part 1.Generalintroduction)
3 Terms and definitions
The following terms and definitions defined by ISO 2041 and ISO 18431-1 apply to this document.
3.1 Short-time Fourier transform
A mathematical transformation related to Fourier transform, used to determine the dependence of harmonic frequency and phase on time in time-varying vibration.
3.2 Wigner-Vile distribution
Bilinear time-frequency description based on autocorrelation of vibration signals.
3.3 Generalized Wigner-Vile distribution
Time-frequency description based on autocorrelation of vibration signal with filtering processing.
3.4 Choi-Wiliams transform
Generalized Wigner-Wille distribution of vibration signal with specific kernel function.
3.5 Wavelettransform
Time-frequency description based on frequency scale transformation of vibration signal.
GB/T 28784.2 | GB/T 28618 | GB/T 28619 | GB/T 29716.4 | GB/T 29716.2 | GB/T 29714 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.
Referenced standards
Normative references
ISO 2041 · ISO 18431
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Related Standards
GB/T 29716.4-2018 — Mechanical vibration and shock -- Signal processing -- Part 4: Shock-response spectrum analysis
GB/T 29716.2-2018 — Mechanical vibration and shock -- Signal processing -- Part 2: Time domain windows for Fourier Transform analysis
GB/T 29716.1-2013 — Mechanical vibration and shock -- Signal processing -- Part 1: General introduction
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