Shaker Verlag GmbH

Shop : Review copy

Shop

Review copy

48,80 €
ISBN 978-3-8440-7405-5
Softcover
190 pages
109 figures
285 g
21 x 14,8 cm
English
Thesis

June 2020

Mohamed Ismail

Bearing Fault Detection and Quantification for Flight Control Electro-mechanical Actuators

This study aimed at investigating fault detection and quantification methods for flight control electro-mechanical actuators (EMAs). The fault quantification work is related to spall quantification for ball screws and ball bearings. Several quantification methods originally developed for industrial applications are intensively reviewed. Such methods are inadequate for EMAs for which a wide variety of transient fault types occurs. A new vibration-based quantification method has been developed to estimate spall size for ball screws and ball bearings within EMAs. The principle is based on locating geometric features on the vibrational jerk rather than direct acceleration measurements. The jerk is numerically derived from acceleration data using a Savitzky–Golay differentiator, which provides signal enhancement to accurately identify spall-related geometric features and their physical size. Experimental work involves fault injected data sets collected from three dissimilar EMA test stands, two provided by the German Aerospace Center (DLR) and one by the NASA Electro-Mechanical Actuator test stand.

Keywords: More Electric Aircraft; Bearings Faults; Ballscrew Faults; Savitzky-Golay Differentiator; Vibration Jerk; Vibration based Fault Detection

Berichte aus der Luft- und Raumfahrttechnik

Please send the review copy to

the editorial address (all fields marked with * must be completed in full)

the reviewer's address (all fields must be completed in full)

Email*

Address of the editorial office

Name of the journal*

Web address*

Street and house number*

Postcode*

City*

Country*

Phone*

Reviewer's address

Form of address *

First name*

Last name*

Street and house number

Postcode

City

Country

Phone

Message

Security code

Please enter the security code*

I consent to Shaker Verlag GmbH using the information and contact details I have provided to contact me, to communicate with me about my contact, and to process my order. The privacy policy can be viewed here.

Shaker Verlag GmbH
Am Langen Graben 15a
52353 Düren
Germany

+49 2421 99011 0

+49 2421 99011 9

info@shaker.eu

www.shaker.eu

Mon. - Thurs. 8:00 a.m. to 4:00 p.m.
Fri. 8:00 a.m. to 3:00 p.m.

Subject*

Please enter the security code*

I consent to Shaker Verlag GmbH using the information and contact details I have provided to contact me when I contact them, to communicate about this and to process my request. This applies in particular to the use of the email address and telephone number for the aforementioned purpose. The privacy policy can be viewed here.*

Social Media

Data Privacy Protection

Imprint

Newsletter