• Complex
  • Title
  • Keyword
  • Abstract
  • Scholars
  • Journal
  • ISSN
  • Conference
搜索

Author:

Zhao, Dezun (Zhao, Dezun.) | Huang, Xiaofan (Huang, Xiaofan.) | Cui, Lingli (Cui, Lingli.)

Indexed by:

EI Scopus SCIE

Abstract:

Time-frequency analysis (TFA) can effectively characterize features of non-stationary signals. Traditional TFA algorithms construct signal models in the time domain and make the assumption that the instantaneous characteristics of each component are continuous. However, the instantaneous frequency (IF) of the transient signal is discontinuous in the time domain and exhibits a multifaceted relationship with time, such as shock, vibration wave, damped sound wave, etc. Additionally, in most existing TFA methods, low-order group delay (GD) is used to describe transient signals, which leads to unsatisfactory energy concentration and calculation accuracy. To address about issues, a novel TFA technique, termed high-order iterative rearrangement transform (HOIRT), is developed in this research. First, the signal model is defined within the frequency domain, and the frequency ridge of the transient signal is described by a high-order GD (HOGD), which is similar to the IF. Second, a HOGD-based iterative synchrosqueezing operator is defined to reassign time-frequency coefficients into the GD trajectories along the time direction. Finally, the HOGD-based frequency extraction operator is constructed to only retain the target time-frequency information of the transient signal from the rearranged results, such that the noise interference is eliminated and the energy-concentrated TFR is obtained. A simulation signal with nonlinear GDs is employed to illustrate the effectiveness of the HOIRT. Compared with the other seven typical TFA algorithms, the developed technique has the smallest calculation error and R & eacute;nyi entropy, showing that the HOIRT has the highest accuracy and energy concentration. Analysis result of the bearing fault impact signal shows that the proposed HOIRT can display the time when pulses occur while ensuring high time-frequency resolution, making it suitable for detecting bearing faults.

Keyword:

iterative synchrosqueezing operator time-frequency analysis high-order group delay Bearing fault diagnosis frequency extraction operator

Author Community:

  • [ 1 ] [Zhao, Dezun]Beijing Univ Technol, Beijing Key Lab Adv Mfg Technol, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 2 ] [Huang, Xiaofan]Beijing Univ Technol, Beijing Key Lab Adv Mfg Technol, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 3 ] [Cui, Lingli]Beijing Univ Technol, Beijing Key Lab Adv Mfg Technol, 100 Pingleyuan, Beijing 100124, Peoples R China

Reprint Author's Address:

  • [Zhao, Dezun]Beijing Univ Technol, Beijing Key Lab Adv Mfg Technol, 100 Pingleyuan, Beijing 100124, Peoples R China;;

Show more details

Related Keywords:

Source :

STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL

ISSN: 1475-9217

Year: 2024

Issue: 2

Volume: 24

Page: 676-692

6 . 6 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

Affiliated Colleges:

Online/Total:1486/10902373
Address:BJUT Library(100 Pingleyuan,Chaoyang District,Beijing 100124, China Post Code:100124) Contact Us:010-67392185
Copyright:BJUT Library Technical Support:Beijing Aegean Software Co., Ltd.