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Quantifying bearing fault severity using time synchronous averaging jerk energy

Ismail, Mohamed A.A. and Sawalhi, Nader and Pham, Thu-Hien (2015) Quantifying bearing fault severity using time synchronous averaging jerk energy. In: 22nd International Congress on Sound and Vibration. 22nd International Congress on Sound and Vibration - ICSV22, 12.-16. Jul. 2015, Florence, Italy.

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Flight control surfaces have the crucial task of allowing the pilot to control the aircraft. Currently, these are generally controlled by hydraulic actuators. As a part of More Electric Aircraft (MAE) trend, some redundant hydraulic actuators are being partially replaced by Electromechanical Actuators (EMA). In order to ensure the ultimate safety of EMA, reliable vibration-based diagnosis capabilities are potentially needed to minimize the catastrophic risk of EMA failure initiated by critical sub-components such as rolling-element bearing. In this paper a new technique to estimate the fault severity of a defective bearing is presented. The technique is based on analyzing the jerk energy gradient of the synchronously averaged fault impact. The averaged signal is extracted by using time synchronous averaging (TSA) triggered by the fault race frequency (FRF) for the detection task and triggered by shaft speed for the quantifying task. FRF is defined, in this work, as the bearing fault frequency of interest divided by the number of rolling elements, which eventually denotes the cage frequency in the case of an outer race fault and the difference between the shaft speed and the cage frequency in the case of an inner race fault. Detailed monitoring of the TSA-based energy is developed for the EMA bearings noting in particular that this can be utilized in other low-speed applications. The effectiveness of the proposed technique is demonstrated and discussed on several seeded faults.

Item URL in elib:https://elib.dlr.de/97395/
Document Type:Conference or Workshop Item (Lecture, Speech)
Title:Quantifying bearing fault severity using time synchronous averaging jerk energy
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ismail, Mohamed A.A.Mohamed.Ismail (at) dlr.deUNSPECIFIED
Sawalhi, Nadernadersaw (at) hotmail.comUNSPECIFIED
Pham, Thu-HienThu-Hien.Pham (at) dlr.deUNSPECIFIED
Date:12 July 2015
Journal or Publication Title:22nd International Congress on Sound and Vibration
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Bearing, Fault Detection, Prognosis, Flight Control Electromechanical Actuators, Vibration based Diagnosis.
Event Title:22nd International Congress on Sound and Vibration - ICSV22
Event Location:Florence, Italy
Event Type:international Conference
Event Dates:12.-16. Jul. 2015
Organizer:The International Institute of Acoustics and Vibration (IIAV)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Safety Critical Systems and Systems Engineering
Deposited By: Ismail, Dr. Mohamed AA
Deposited On:22 Jul 2015 16:50
Last Modified:31 Jul 2019 19:54

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