Gear And Transmission Research At Nasa Lewis Research Center

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ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.95/5 ( download)

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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.

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ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.08/5 ( 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:

Author : National Aeronautics and Space Administration NASA
Publisher :
ISBN 13 : 9781729141595
Total Pages : 24 pages
Book Rating : 4.95/5 ( download)

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Download or read book A Review of Transmission Diagnostics Research at NASA Lewis Research Center written by National Aeronautics and Space Administration NASA and published by . This book was released on 2018-10-23 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a summary of the transmission diagnostics research work conducted at NASA Lewis Research Center over the last four years. In 1990, the Transmission Health and Usage Monitoring Research Team at NASA Lewis conducted a survey to determine the critical needs of the diagnostics community. Survey results indicated that experimental verification of gear and bearing fault detection methods, improved fault detection in planetary systems, and damage magnitude assessment and prognostics research were all critical to a highly reliable health and usage monitoring system. In response to this, a variety of transmission fault detection methods were applied to experimentally obtained fatigue data. Failure modes of the fatigue data include a variety of gear pitting failures, tooth wear, tooth fracture, and bearing spalling failures. Overall results indicate that, of the gear fault detection techniques, no one method can successfully detect all possible failure modes. The more successful methods need to be integrated into a single more reliable detection technique. A recently developed method, NA4, in addition to being one of the more successful gear fault detection methods, was also found to exhibit damage magnitude estimation capabilities. Zakajsek, James J. Glenn Research Center RTOP 505-62-36...

Author : Faydor L. Litvin
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.68/5 ( download)

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Download or read book Development of Gear Technology and Theory of Gearing written by Faydor L. Litvin and published by . This book was released on 1997 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent developments in the theory of gearing and the modifications in gear geometry necessary to improve the conditions of meshing. Highlighted are low-noise gear drives that have a stable contact during meshing and a predesigned parabolic transmission error function that can handle misalignment during operation without sacrificing the low-noise aspects of operation. This book also provides a comprehensive history of the develoment of the theory of gearing through biographies of major contributors to this field. The author's unique historical perspective was achieved by assiduous research into the lives of courageous, talented, and creative men who made significant contributions to the field of gearing.

Author : John J. Coy
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.37/5 ( download)

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Download or read book Advanced Transmission Studies written by John J. Coy and published by . This book was released on 1988 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Lewis Research Center and the U.S. Army Aviation Systems Command share an interest in advancing the technology for helicopter propulsion systems. In particular, this paper presents highlights from that portion of the program in drive train technology and the related mechanical components. The major goals of the program are to increase life, reliability, and maintainability; reduce the weight, noise, and vibration; and maintain the relatively high mechanical efficiency of the gear train. The current activity emphasizes noise reduction technology and analytical code development followed by experimental verification. Selected significant advances in technology for transmissions are reviewed, including advanced configurations and new analytical tools. Finally, the plan for transmission research in the future is presented.

Author : United States. National Aeronautics and Space Administration
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.4E/5 ( download)

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Download or read book NASA Technical Paper written by United States. National Aeronautics and Space Administration and published by . This book was released on 1977 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Lewis Research Center
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ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.52/5 ( download)

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Download or read book Aeropropulsion Facilities at the NASA Lewis Research Center written by Lewis Research Center and published by . This book was released on 1995 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722111427
Total Pages : 30 pages
Book Rating : 4.29/5 ( download)

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Download or read book Comparison Study of Gear Dynamic Computer Programs at NASA Lewis Research Center written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-30 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comparison study was performed on four gear dynamic analysis computer programs developed under NASA/Army sponsorship. These programs are GRDYNMULT (a multimesh program applicable to a number of epicyclic systems), TELSGE (a single mesh program), PGT (a multimesh program applicable to a planetary system with three planets), and DANST (a single mesh program). The capabilities and features, input and output options, and technical aspects of the programs were reviewed and compared. Results are presented in a concise tabular form. Parametric studies of the program models were performed to investigate the predicted results of the programs as input parameters such as speed, torque, and mesh damping were varied. In general, the program models predicted similar dynamic load and stress levels as operating conditions were varied. Flash temperature predictions from programs GRDYNMULT and TELSGE indicated similar trends; however, actual values were not in close agreement. The program GRDYNMULT was found to be the most versatile in system size, type, and analysis capabilities. The programs DANST, TELSGE, and PGT are more specialized for specific systems; however, in specific areas they provide a more detailed treatment than GRDYNMULT. Zakrajsek, James J. Glenn Research Center DA PROJ. 1L1-62209-AH-76; RTOP 505-63-51...

Author : James J. Zakrajsek
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.66/5 ( download)

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Download or read book Comparison Study of Gear Dynamic Computer Programs at NASA Lewis Research Center written by James J. Zakrajsek and published by . This book was released on 1989 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.66/5 ( download)

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Download or read book NASA Scientific and Technical Publications written by and published by . This book was released on 1987 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: