NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Vibration Based Sun Gear Damage DetectionSeeded fault experiments were conducted on the planetary stage of an OH-58C helicopter transmission. Two vibration based methods are discussed that isolate the dynamics of the sun gear from that of the planet gears, bearings, input spiral bevel stage, and other components in and around the gearbox. Three damaged sun gears: two spalled and one cracked, serve as the focus of this current work. A non-sequential vibration separation algorithm was developed and the resulting signals analyzed. The second method uses only the time synchronously averaged data but takes advantage of the signal/source mapping required for vibration separation. Both algorithms were successful in identifying the spall damage. Sun gear damage was confirmed by the presence of sun mesh groups. The sun tooth crack condition was inconclusive.
Document ID
20140005560
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Hood, Adrian
(Army Research Lab. Aberdeen Proving Ground, MD, United States)
LaBerge, Kelsen
(Army Research Lab. Aberdeen Proving Ground, MD, United States)
Lewicki, David
(NASA Glenn Research Center Cleveland, OH United States)
Pines, Darryll
(Maryland Univ. College Park, MD, United States)
Date Acquired
May 12, 2014
Publication Date
August 4, 2013
Subject Category
Aircraft Propulsion And Power
Aircraft Design, Testing And Performance
Report/Patent Number
DETC2013-12361
GRC-E-DAA-TN8866
Meeting Information
Meeting: 2013 Power Transmission and Gearing Conference
Location: Portland, OR
Country: United States
Start Date: August 4, 2013
End Date: August 7, 2013
Sponsors: American Society of Mechanical Engineers
Funding Number(s)
CONTRACT_GRANT: W911W6-07-2-0003
WBS: WBS 380046.02.03.02.02.02
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
diagnostics
gears
transmissions
No Preview Available