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Two-Speed Gearbox Dynamic Simulation Predictions and Test ValidationDynamic simulations and experimental validation tests were performed on a two-stage, two-speed gearbox as part of the drive system research activities of the NASA Fundamental Aeronautics Subsonics Rotary Wing Project. The gearbox was driven by two electromagnetic motors and had two electromagnetic, multi-disk clutches to control output speed. A dynamic model of the system was created which included a direct current electric motor with proportional-integral-derivative (PID) speed control, a two-speed gearbox with dual electromagnetically actuated clutches, and an eddy current dynamometer. A six degree-of-freedom model of the gearbox accounted for the system torsional dynamics and included gear, clutch, shaft, and load inertias as well as shaft flexibilities and a dry clutch stick-slip friction model. Experimental validation tests were performed on the gearbox in the NASA Glenn gear noise test facility. Gearbox output speed and torque as well as drive motor speed and current were compared to those from the analytical predictions. The experiments correlate very well with the predictions, thus validating the dynamic simulation methodologies.
Document ID
20100024378
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Lewicki, David G. (NASA Glenn Research Center Cleveland, OH, United States)
DeSmidt, Hans (Tennessee Univ. Knoxville, TN, United States)
Smith, Edward C. (Pennsylvania State Univ. University Park, PA, United States)
Bauman, Steven W. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
May 1, 2010
Subject Category
Mechanical Engineering
Report/Patent Number
NASA/TM-2010-216363
E-17299
Meeting Information
Meeting: 66th Annual Forum and Technology Display(AHS Forum 66)
Location: Phoenix, AZ
Country: United States
Start Date: May 11, 2010
End Date: May 13, 2010
Sponsors: American Helicopter Society, Inc.
Funding Number(s)
WBS: WBS 877868.02.07.03.01.01.01
Distribution Limits
Public
Copyright
Public Use Permitted.

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