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Design Space Exploration of Pericyclic TransmissionThe pericyclic transmission provides the opportunity to vastly impact transmission design in rotorcraft due to its ability to provide exceedingly high reduction ratios in a single stage that would normally require multiple gear stages to produce. This could lead to lighter transmissions with fewer components, increased range, reliability, efficiency, speed and decreased cost to maintain. While many previous studies have focused upon the gearing within the pericyclic transmission, this work focused on what influences pericyclic geometry, and how changes in geometry impacts bearing loads. Specifically the loading of bearings that must deliver power from the input shaft to the nutating and rotating gears of the system were of primary concern. A comprehensive look at dynamic loads generated by nutating bodies was performed. Methods to address these dynamic loads via application of counterbalances and deviation from conventional pericyclic transmission designs were utilized to negate the dynamic moment of concern. Finally a static solver was used to determine the bearing loads with updated component geometries and mass moment of inertias that included the required counterbalances.
Document ID
20190001144
Acquisition Source
Glenn Research Center
Document Type
Presentation
Authors
Cameron, Zachary A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
March 4, 2019
Publication Date
August 20, 2018
Subject Category
Mechanical Engineering
Report/Patent Number
GRC-E-DAA-TN59816
Meeting Information
Meeting: SLaMS ECF
Location: Greenbelt, MD
Country: United States
Start Date: August 21, 2018
End Date: August 24, 2018
Sponsors: NASA Headquarters
Funding Number(s)
WBS: WBS 664817.02.03.02.02.01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
Nutational Gearing
Pericyclic Drive
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