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Dynamic Characteristics of Helicopter Bearingless Main Rotor
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 Title & Authors
Dynamic Characteristics of Helicopter Bearingless Main Rotor
Yun, Chul Yong; Song, Keun Woong; Kim, Deog-Kwan;
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 Abstract
The characteristics of bearingless main rotor of helicopter are investigated through non-rotating tests and rotating tests. The stiffness and natural frequencies of rotor blades, flexbeam, and torque tube which are core components of baearingless rotor are measured to obtain input material properties for rotor analysis. The functional test on ground for assembly of one hub with damper, snubber, and no blade is carried out to check interfaces between components, kinematics of components, and pitch motion ranges under applied loads including centrifugal load. The 4-bladed bearingless rotor with 5.82m of rotor radius is tested on the whirl tower with rotation plane of 9.65m height. The thrust and power are measured to obtain hover performance and the frequencies and dampings of the rotor are obtained by excitation of cyclic pitch by hydraulic actuators.
 Keywords
Helicopter;Bearingless rotor;Dynamic characteristics;Damping;Whirl test;
 Language
Korean
 Cited by
 References
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