A review of phase space topology methods for vibration-based fault diagnostics in nonlinear systems

TH Mohamad, F Nazari, C Nataraj - Journal of Vibration Engineering & …, 2020 - Springer
Background In general, diagnostics can be defined as the procedure of mapping the
information obtained in the measurement space to the presence and magnitude of faults in …

Application of deep cnn-lstm network to gear fault diagnostics

TH Mohamad, A Abbasi, E Kim… - 2021 IEEE International …, 2021 - ieeexplore.ieee.org
Condition-based maintenance (CBM) is an optimum predictive maintenance framework that
proposes maintenance actions based on monitoring the state data of an asset. Diagnostics …

Fault identification and severity analysis of rolling element bearings using phase space topology

T Haj Mohamad, C Nataraj - Journal of Vibration and Control, 2021 - journals.sagepub.com
This article presents the application of phase space topology and time-domain statistical
features for rolling element bearing diagnostics in rotating machines under variable …

[HTML][HTML] Gear fault detection using recurrence quantification analysis and support vector machine

TH Mohamad, Y Chen, Z Chaudhry… - Journal of Software …, 2018 - scirp.org
This paper presents the application of recurrence plots (RPs) and recurrence quantification
analysis (RQA) in the diagnostics of various faults in a gear-train system. For this study …

[PDF][PDF] Gear fault diagnostics using extended phase space topology

TH Mohamad, C Nataraj - Annual conference of the prognostics …, 2017 - researchgate.net
This paper applies a novel feature extraction method called Extended Phase Space
Topology (EPST) in order to diagnose various faults in a gear-train system. The EPST …

An overview of PST for vibration based fault diagnostics in rotating machinery

TH Mohamad, C Nataraj - MATEC Web of Conferences, 2018 - matec-conferences.org
In general, diagnostics can be defined as the procedure of mapping the information
obtained in the measurement space to the presence and magnitude of faults in the fault …

Detection of cracks in a rotating shaft using density characterization of orbit plots

T Haj Mohamad, AA Cavalini, V Steffen… - Proceedings of the 10th …, 2019 - Springer
The research focuses on fault detection and diagnostics of cracks in a rotating shaft by using
the Extended Phase Space Topology approach (EPST). EPST is based on extracting …

Multi-speed multi-load bearing diagnostics using extended phase space topology

TH Mohamad, CAK Kwuimy… - Matec web of …, 2018 - matec-conferences.org
This paper presents the application of Extended Phase Space Topology (EPST) and
conventional statistical time domain features in the diagnostics of various bearing faults in …

Using the Gottwald and Melbourne's 0-1 test and the Hugichi fractal dimension to detect chaos in defective and healthy ball bearings

CAK Kwuimy, TH Mohamad… - MATEC Web of …, 2018 - matec-conferences.org
The paper considers the identification of chaotic behavior dynamics using the data extracted
from an experimental model of rotor supported on rolling elements. A description of the …

Early detection of cracks in a gear-train system using proper and smooth orthogonal decompositions

Z Liu, TH Mohamad, S Ilbeigi, C Nataraj - Advances in Nonlinear …, 2021 - Springer
Abstract Machine learning is broadly used as an efficient approach to fault diagnosis and
defect detection in gear-train systems. However, the complex nonstationary dynamics and …