Research and analysis of the wheeled vehicle load spectrum editing method based on short-time Fourier transform

Liu, Zong-Kai; Peng, Chuan; Yang, Xiao Qiang

doi:10.1177/0954407019830205

Cited by 10 publications

(8 citation statements)

References 21 publications

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“…The STFT-based editing process is with reference to [ 12 ]. Combined with a ‘spectrogram’ function in MATLAB, the window function is chosen as the Gaussian, with a window length

and an overlap

.…”

Section: Load Signals Acquisition and Accelerated Editingmentioning

confidence: 99%

“…The Short-time Fourier-transform (STFT) based approach divides the load spectrum into a series of equal-length short segments, and then Fourier-transforms of each segment are adopted to express the load history in the time-frequency domain [ 10 ]. Pratumnopharat et al [ 11 ], Liu et al [ 12 ], and Wen et al [ 13 ] successively investigated various fatigue data editing methods, where the accumulative power spectral density (AccPSD) of the signal obtained by STFT was proposed to identify fatigue damage events. The results indicated that the STFT-based method could not only improve the accuracy of fatigue damage retention but also shorten time durations.…”

Section: Introductionmentioning

confidence: 99%

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Accelerated Editing Method for Vehicle Durability Fatigue Load Spectrum Based on Wigner-Ville Transform

Yang

Zhang

Peng

et al. 2023

Sensors

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A Wigner-Ville transform-based (WVT-based) load spectrum fast editing method for vehicle parts is proposed to improve the efficiency of durability tests. In this method, the instantaneous energy spectrum (IES) of the original time-domain signal is obtained via the Wigner-Ville transform, which is used as a criterion to identify time-domain points of ineffective damage contribution. A genetic algorithm (GA) based threshold optimization model is also proposed to automatically set the threshold of the IES under consideration of the relative damage requirements and statistical parameters of the signal. The effectiveness of the above proposed editing method is demonstrated by compiling an SUV’s suspension coil spring signal obtained from physical sensor-based measurements. Meanwhile, the same spectrum is also processed using time-domain editing, Short-time Fourier-transform, and S-transform methods for comparison. The results show that the WVT-based edited spectrum has a time-duration retention ratio of about 76.30%, which is significantly superior to other methods, with the same pseudo-damage retention and statistical parameter error constraints. Moreover, in combination with the fatigue simulation analysis, it verifies that the load effect of the edited spectrum matches well with that of the original. Thus, the proposed method is considered more effective for compiling component load signals in vehicle acceleration durability tests.

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“…The STFT-based editing process is with reference to [ 12 ]. Combined with a ‘spectrogram’ function in MATLAB, the window function is chosen as the Gaussian, with a window length

and an overlap

.…”

Section: Load Signals Acquisition and Accelerated Editingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Accelerated Editing Method for Vehicle Durability Fatigue Load Spectrum Based on Wigner-Ville Transform

Yang

Zhang

Peng

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…The load spectrum expresses the load time history of components in the real working condition, that is, the statistical law of load and time, which is widely used in aerospace [3][4], automobile [5][6], mechanical engineering [7] and other fields. Compiling the load spectrum of motorized spindle provides the basis to simulate the actual working conditions in the laboratory.…”

Section: Introductionmentioning

confidence: 99%

Compilation of drilling load spectrum based on the characteristics of drilling force

Jin

Yan

Guo

et al. 2022

Int J Adv Manuf Technol

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In order to overcome the problem that the existing methods of compiling load spectrum of spindle or machine tool mainly aim at the cutting force spectrum, torque spectrum and speed spectrum respectively, which ignore the connection between each spectrum, in this paper, a method for compiling drilling load spectrum of motorized spindle in CNC machine tool based on the characteristics of drilling force is proposed. Firstly, drilling tests under different processing technologies are carried out to measure its load, and the correction coefficient in the empirical formula of drilling force is obtained through fitting the measured drilling force, which makes the calculation of the axial force and torque more reasonable. Secondly, compared with the extended factor method, the transcendental probability method is optimized to solve the ultimate load of the axial force. Then, after setting the axial force as the main load of drilling, an eight-stage load spectrum for the main load is compiled. Finally, according to the relationship between the axial force and other loads, the eight-stage loading spectrum is transformed into a multi-dimensional drilling load spectrum.

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“…In terms of the applicability of the shortened signal, this kind of signal can be normally used in laboratory scale durability fatigue test. Liu et al 22 applied the STFT method for editing the measured uniaxial-head acceleration load spectrum in the road simulation test to speed up the reliability test process and reduce time costs. Wen et al 23 applied the STFT approach to identify and extract high fatigue damage segments of original load signal and obtain reduced accelerated load spectrum of tractor components.…”

Section: Introductionmentioning

confidence: 99%

Load spectrum compilation for vehicle road simulation test by applying a new time domain threshold editing method

Zhao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Vehicle road simulation test can simulate random service load spectrum fairly well in laboratory, and is currently a preferable way to fast verify vehicle fatigue properties. Applying a reasonable load spectrum editing technique is a crucial way to accelerate the test and reduce testing time and costs. The present study deals with the generation of test load spectrum for vehicle road simulation test by applying a load spectrum two-dimension time-domain-threshold editing method (STTE) to delete useless load-time segments with negligible fatigue damage to vehicle components. Additionally, a method of load spectrum connection by applying window function was proposed to smoothly connect retained load-time segments when the useless segments were deleted. Taking a vehicle four-post bench test as an example, the process of load spectra generation was discussed in detail. The generated accelerated spectra were reduced to 33% in length relative to the original spectra. The accelerated spectra showed good consistency with the original spectra in terms of amplitude and frequency characteristics. Finally, the accelerated spectra were applied as target spectra to conduct four-post bench test, and good load spectra simulation effect was realized. Therefore, the accelerated spectra can be served as a substitute of the original spectra to conduct the test. To conclude, the proposed load spectra generation methods are suggested as an alternative technique in automotive fatigue data editing.

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Research and analysis of the wheeled vehicle load spectrum editing method based on short-time Fourier transform

Cited by 10 publications

References 21 publications

Accelerated Editing Method for Vehicle Durability Fatigue Load Spectrum Based on Wigner-Ville Transform

Accelerated Editing Method for Vehicle Durability Fatigue Load Spectrum Based on Wigner-Ville Transform

Compilation of drilling load spectrum based on the characteristics of drilling force

Load spectrum compilation for vehicle road simulation test by applying a new time domain threshold editing method

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