Vipperman, JS and Clark, RL and Conner, M and Dowell, EH
(1998)
Experimental active control of a typical section using a trailing-edge flap.
Journal of Aircraft, 35 (2).
224 - 229.
ISSN 0021-8669
Abstract
This paper presents an experimental implementation of an active control system used to suppress flutter in a typical section airfoil. The H2 optimal control system design is based on experimental system identifications of the transfer functions between three measured system variables - pitch, plunge, and flap position - and a single control signal that commands the flap of the airfoil. Closed-loop response of the airfoil demonstrated gust alleviation below the open-loop flutter boundary. In addition, the flutter boundary was extended by 12.4% through the application of active control. Cursory robustness tests demonstrate stable control for variations in flow speed of ± 10%.
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