Gear Noise Vibration And Diagnostic Studies At Nasa Lewis Research Center

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Gear Noise, Vibration, and Diagnostic Studies at NASA Lewis Research Center

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Author :
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (227 download)

Book Synopsis Gear Noise, Vibration, and Diagnostic Studies at NASA Lewis Research Center by :

Download or read book Gear Noise, Vibration, and Diagnostic Studies at NASA Lewis Research Center written by and published by . This book was released on 1990 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Lewis Research Center and the U.S. Army Aviation Systems Command are involved in a joint research program to advance the technology of rotorcraft transmissions. This program consists of analytical as well as experimental efforts to achieve the overall goals of reducing weight, noise, and vibration, while increasing life and reliability. This paper highlights recent analytical activities in the areas of gear noise, vibration, and diagnostics performed in-house and through NASA and U.S. Army sponsored grants and contracts. These activities include studies of gear tooth profiles to reduce transmission error and vibration as well as gear housing and rotordynamic modeling to reduce structural vibration transmission and noise radiation, and basic research into current gear failure diagnostic methodologies. Results of these activities are presented along with an overview of near term research plans in the gear noise, vibration, and diagnostics area. Keyword: Helicopters, Gear noise, Vibration, Diagnostics, Defect analysis, Functional analysis, Weight reduction, Noise reduction, Gear teeth, Profiles, Dynamics, Models, Radiation, Failure mechanics, Methodology, Air Force Research, Lubrication, Materials, Kinematics, Transmission gears, Numerical analysis, Mathematical models, Transmisivity, Acoustics misalignment, Input output models, Deflection, Geometry, Surface, Error, Transmission, Gears. (emk).

Gear and Transmission Research at NASA Lewis Research Center

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ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (317 download)

Book Synopsis Gear and Transmission Research at NASA Lewis Research Center by :

Download or read book Gear and Transmission Research at NASA Lewis Research Center written by and published by . This book was released on 1997 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper is a review of some of the research work of the NASA Lewis Research Center Mechanical Components Branch. It includes a brief review of the NASA Lewis Research Center and the Mechanical Components Branch. The research topics discussed are crack propagation of gear teeth, gear noise of spiral bevel and other gears, design optimization methods, methods we have investigated for transmission diagnostics, the analytical and experimental study of gear thermal conditions, the analytical and experimental study of split torque systems, the evaluation of several new advanced gear steels and transmission lubricants and the evaluation of various aircraft transmissions. The area of research needs for gearing and transmissions is also discussed.

Gearbox Vibration Diagnostic Analyzer

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Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722254858
Total Pages : 24 pages
Book Rating : 4.2/5 (548 download)

Book Synopsis Gearbox Vibration Diagnostic Analyzer by : National Aeronautics and Space Administration (NASA)

Download or read book Gearbox Vibration Diagnostic Analyzer written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-03 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the Gearbox Vibration Diagnostic Analyzer installed in the NASA Lewis Research Center's 500 HP Helicopter Transmission Test Stand to monitor gearbox testing. The vibration of the gearbox is analyzed using diagnostic algorithms to calculate a parameter indicating damaged components. Unspecified Center NAS3-26134; RTOP 505-63-36...

Gearbox Noise and Vibration

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ISBN 13 :
Total Pages : 242 pages
Book Rating : 4.3/5 (91 download)

Book Synopsis Gearbox Noise and Vibration by :

Download or read book Gearbox Noise and Vibration written by and published by . This book was released on 1990 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: The record of proceedings of a conference, organized by the Institute of Mechanical Engineers, which brought together an international group of experts on the control of noise and vibration problems, and on the development of diagnostic techniques for quality assurance and in-service monitoring.

NASA Technical Memorandum

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ISBN 13 :
Total Pages : 492 pages
Book Rating : 4.:/5 (319 download)

Book Synopsis NASA Technical Memorandum by :

Download or read book NASA Technical Memorandum written by and published by . This book was released on 1994 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Transmission Diagnostic Research at NASA Lewis Research Center

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Author :
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (317 download)

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Download or read book Transmission Diagnostic Research at NASA Lewis Research Center written by and published by . This book was released on 1995 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Scientific and Technical Aerospace Reports

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ISBN 13 :
Total Pages : 376 pages
Book Rating : 4.:/5 (3 download)

Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Gear and Transmission Research at NASA Lewis Research Center

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Author : Dennis P. Townsend
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (227 download)

Book Synopsis Gear and Transmission Research at NASA Lewis Research Center by : Dennis P. Townsend

Download or read book Gear and Transmission Research at NASA Lewis Research Center written by Dennis P. Townsend and published by . This book was released on 1997 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper is a review of some of the research work of the NASA Lewis Research Center Mechanical Components Branch. It includes a brief review of the NASA Lewis Research Center and the Mechanical Components Branch. The research topics discussed are crack propagation of gear teeth, gear noise of spiral bevel and other gears, design optimization methods, methods we have investigated for transmission diagnostics, the analytical and experimental study of gear thermal conditions, the analytical and experimental study of split torque systems, the evaluation of several new advanced gear steels and transmission lubricants and the evaluation of various aircraft transmissions. The area of research needs for gearing and transmissions is also discussed.

Bibliography of Lewis Research Center Technical Publications Announced in 1991

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ISBN 13 :
Total Pages : 410 pages
Book Rating : 4.:/5 (317 download)

Book Synopsis Bibliography of Lewis Research Center Technical Publications Announced in 1991 by :

Download or read book Bibliography of Lewis Research Center Technical Publications Announced in 1991 written by and published by . This book was released on 1992 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Evaluation of a Vibration Diagnostic System for the Detection of Spur Gear Pitting Failures

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Author : Dennis P. Townsend
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (317 download)

Book Synopsis Evaluation of a Vibration Diagnostic System for the Detection of Spur Gear Pitting Failures by : Dennis P. Townsend

Download or read book Evaluation of a Vibration Diagnostic System for the Detection of Spur Gear Pitting Failures written by Dennis P. Townsend and published by . This book was released on 1993 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Monthly Catalogue, United States Public Documents

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ISBN 13 :
Total Pages : 1644 pages
Book Rating : 4.:/5 (31 download)

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Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1991 with total page 1644 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Monthly Catalog of United States Government Publications

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ISBN 13 :
Total Pages : 1200 pages
Book Rating : 4.:/5 (891 download)

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Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Effects on Diagnostic Parameters After Removing Additional Synchronous Gear Meshes

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ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (317 download)

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Download or read book Effects on Diagnostic Parameters After Removing Additional Synchronous Gear Meshes written by and published by . This book was released on 2003 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gear cracks are typically difficult to diagnose with sufficient time before catastrophic damage occurs. Significant damage must be present before algorithms appear to be able to detect the damage. Frequently there are multiple gear meshes on a single shaft. Since they are all synchronous with the shaft frequency, the commonly used synchronous averaging technique is ineffective in removing other gear mesh effects. Carefully applying a filter to these extraneous gear mesh frequencies can reduce the overall vibration signal and increase the accuracy of commonly used vibration metrics. The vibration signals from three seeded fault tests were analyzed using this filtering procedure. Both the filtered and unfiltered vibration signals were then analyzed using commonly used fault detection metrics and compared. The tests were conducted on aerospace quality spur gears in a test rig. The tests were conducted at speeds ranging from 2500 to 5000 revolutions per minute and torques from 184 to 228 percent of design load. The inability to detect these cracks with high confidence results from the high loading which is causing fast fracture as opposed to stable crack growth. The results indicate that these techniques do not currently produce an indication of damage that significantly exceeds experimental scatter.

Bibliography of Lewis Research Center Technical Publications Announced in 1990

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ISBN 13 :
Total Pages : 446 pages
Book Rating : 4.:/5 (317 download)

Book Synopsis Bibliography of Lewis Research Center Technical Publications Announced in 1990 by :

Download or read book Bibliography of Lewis Research Center Technical Publications Announced in 1990 written by and published by . This book was released on 1991 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:

NASA SP.

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ISBN 13 :
Total Pages : 654 pages
Book Rating : 4.:/5 (319 download)

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Download or read book NASA SP. written by and published by . This book was released on 1992 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Shock and Vibration Digest

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ISBN 13 :
Total Pages : 656 pages
Book Rating : 4.:/5 (319 download)

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Download or read book The Shock and Vibration Digest written by and published by . This book was released on 1974 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aeroacoustics of Flight Vehicles

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Author : Harvey H. Hubbard
Publisher :
ISBN 13 :
Total Pages : 620 pages
Book Rating : 4.F/5 ( download)

Book Synopsis Aeroacoustics of Flight Vehicles by : Harvey H. Hubbard

Download or read book Aeroacoustics of Flight Vehicles written by Harvey H. Hubbard and published by . This book was released on 1991 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: