Results 21 to 30 of about 31,094 (285)

Compound Fault Diagnosis of Aero-Engine Rolling Element Bearing Based on CCA Blind Extraction

open access: yesIEEE Access, 2021
Fault diagnosis of aero-engine spindle bearing is a critical technique of engine prognostics and health management. As is known that the diagnosis of compound fault of aero-engine spindle bearing is very difficult and easily affected by other vibration ...
Wei-Tao Zhang   +3 more
doaj   +1 more source

A feature learning method for rotating machinery fault diagnosis via mixed pooling deep belief network and wavelet transform

open access: yesResults in Physics, 2022
Deep learning has extensive application in fault diagnosis regarding the health monitoring of machinery core components. Although deep networks have better nonlinear representation ability, they inevitably introduce a large number of parameters ...
Jiahui Tang, Jimei Wu, Jiajuan Qing
doaj   +1 more source

Adaptive Multiscale Weighted Permutation Entropy for Rolling Bearing Fault Diagnosis [PDF]

open access: yes, 2020
© 2020 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/.Bearing vibration signals contain non-linear and non-stationary features due to ...
Huo, Zhiqiang   +3 more
core   +2 more sources

Research on gearbox compound fault diagnosis method and system development based on entire gearbox health maintenance

open access: yesAdvances in Mechanical Engineering, 2023
In general, gearbox is prone to occur compound fault due to its harsh working environment and its fault vibration signal contains multi-components which correspond to each gearbox parts.
Lu Yan   +5 more
doaj   +1 more source

Compound Fault Feature Extraction of Wind Power Gearbox Based on DRS and Improved Autogram

open access: yesZhongguo dianli, 2023
Compound fault feature extraction is the key to analyzing the root cause of wind power gearbox faults. A compound fault feature extraction method based on DRS and improved Autogram is proposed.
Haifei MA   +4 more
doaj   +1 more source

An improved Autogram and MOMEDA method to detect weak compound fault in rolling bearings

open access: yesMathematical Biosciences and Engineering, 2022
When weak compound fault occurs in rolling bearing, the faint fault features suffer from serious noise interference, and different type faults are coupled together, making it a great challenge to separate the fault features.
Xuyang Xie   +6 more
doaj   +1 more source

Fault Diagnosis of Rotating Machinery Using Denoising-Integrated Sparse Autoencoder Based Health State Classification

open access: yesIEEE Access, 2023
The diagnostic study on single-fault with distinguishing features based on monitoring data analysis is mature and fruitful in recent years. However, the early fault signals collected by practical monitoring systems often possess the following ...
Jing Yang, Guo Xie, Yanxi Yang
doaj   +1 more source

Intelligent diagnosis of rolling bearing compound faults based on device state dictionary set sparse decomposition feature extraction–hidden Markov model

open access: yesAdvances in Mechanical Engineering, 2020
Identification of rolling bearing fault patterns, especially for the compound faults, has attracted notable attention and is still a challenge in fault diagnosis.
HongChao Wang, WenLiao Du
doaj   +1 more source

Assertion: Just One Way to Take It Back [PDF]

open access: yes, 2016
According to Jonathan Kvanvig, the practice of taking back one’s assertion when finding out that one has been mistaken or gettiered fails to speak in favour of a knowledge norm of assertion.
Simion, Mona3
core   +2 more sources

Meta-heuristic algorithms in car engine design: a literature survey [PDF]

open access: yes, 2015
Meta-heuristic algorithms are often inspired by natural phenomena, including the evolution of species in Darwinian natural selection theory, ant behaviors in biology, flock behaviors of some birds, and annealing in metallurgy.
Tayarani-N, Mohammad-H.   +2 more
core   +2 more sources

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