Vibration and Performance Analyses Using Individual Blade Pitch Controls for Lift-Offset Rotors
Joint Authors
Park, Jae-Sang
Kim, Do-Hyung
Chae, Sanghyun
Lee, Ye-Lin
Go, Jeong-In
Source
International Journal of Aerospace Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-05-05
Country of Publication
Egypt
No. of Pages
13
Abstract EN
This work attempts to reduce the hub vibratory loads of a lift-offset rotor using IBC (individual blade pitch control) in high-speed forward flight.
As a lift-offset rotor for the present study, the rigid coaxial rotor of a XH-59A compound helicopter is considered and CAMRAD II is used to predict the hub vibration and rotor performance.
Using the IBC with a single harmonic input at 200 knots, the vibration index of the XH-59A rotor is minimized by about 62% when the 3/rev actuation frequency is applied with the IBC amplitude of 1° and control phase angle of 270° (3P/1°/270°); however, the rotor effective lift-to-drag ratio decreases by 3.43%.
When the 2/rev actuation frequency with the amplitude of 2° and control phase angle of 270° (2P/2°/270°) and the 3/rev actuation frequency using the magnitude of 1° and control phase angle of 210° (3P/1°/210°) are used in combination for the IBC with multiple harmonic inputs, the vibration index is reduced by about 62%, while the rotor effective lift-to-drag ratio increases by 0.37% at a flight speed of 200 knots.
This study shows that the hub vibration of the lift-offset rotor in high-speed flight can be reduced significantly but the rotor performance increases slightly, using the IBC with multiple harmonic inputs.
American Psychological Association (APA)
Park, Jae-Sang& Kim, Do-Hyung& Chae, Sanghyun& Lee, Ye-Lin& Go, Jeong-In. 2019. Vibration and Performance Analyses Using Individual Blade Pitch Controls for Lift-Offset Rotors. International Journal of Aerospace Engineering،Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1157149
Modern Language Association (MLA)
Park, Jae-Sang…[et al.]. Vibration and Performance Analyses Using Individual Blade Pitch Controls for Lift-Offset Rotors. International Journal of Aerospace Engineering No. 2019 (2019), pp.1-13.
https://search.emarefa.net/detail/BIM-1157149
American Medical Association (AMA)
Park, Jae-Sang& Kim, Do-Hyung& Chae, Sanghyun& Lee, Ye-Lin& Go, Jeong-In. Vibration and Performance Analyses Using Individual Blade Pitch Controls for Lift-Offset Rotors. International Journal of Aerospace Engineering. 2019. Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1157149
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1157149