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The Instantaneous Efficiency of Cantilever Geared Rotary Actuators in Flight Control Systems
Technical Paper
2015-01-2413
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The instantaneous efficiency of an epicyclic geared rotary actuator is an important factor in sizing flight control systems where compound epicyclic gear trains are typically used. The efficiency variation can be smooth or fluctuating depending on the combination and timing of the teeth of ring gears, planet gears and sun gears.
In a previous paper [1], the instantaneous efficiency characteristics of actuators with symmetric planets were investigated. The actuator's reacting forces on the planets are symmetric and the overall length of the planet gears will not affect the efficiency.
In this paper, a cantilever actuator with asymmetric planet gears is studied. The length and location of the reaction forces on the planet gears are key factors in the efficiency calculation. Theoretical derivation is presented and test results are compared.
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Authors
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Citation
Wang, A., Davies, J., Gitnes, S., and El-Bayoumy, L., "The Instantaneous Efficiency of Cantilever Geared Rotary Actuators in Flight Control Systems," SAE Technical Paper 2015-01-2413, 2015, https://doi.org/10.4271/2015-01-2413.Also In
References
- Anngwo Wang ; Seth Gitnes , and Lotfi El-Bayoumy The Instantaneous Efficiency of Epicyclic Gears in Flight Control Systems ASME Journal of Mechanical Design 133 May 2011
- John Colbourne Efficiency of High Contact Ratio Planetary Gear Trains AGMA Fall Technical Meeting Papers 1995
- Pasquier , M. and Foucher , P. An Analytical Method for the Calculation of the Efficiency of Planetary Gears AGMA Fall Technical Meeting Papers 1994
- Glover , John H. How to Construct Ratio and Efficiency Formulas for Planetary Gear Trains AGMA Fall Technical Meeting Papers October 1969
- Glover , John H. Efficiency and Speed-ratio Formulas for Planetary Gear Systems Product Engineering 27 September 1965
- AGMA Fundamental Rating Factors and Calculation Methods for Involute Spur and Helical Gear Teeth ANSI/AGMA 2001-B88 1988