Closed Loop Control of a Wing's Lift for 'Gust' Suppression
Abstract
The ability to maintain a constant lift force on a low aspect ratio semi circular wing using pulsed blowing active flow control is experimentally investigated. Dynamic models of the wing's response to pressure (pulsed blowing) actuation and the response to longitudinal gusting are obtained through black-box system identification methods. Robust closed loop controllers are synthesized using a mixed sensitivity loop shaping approach. An additional feedforward disturbance compensation is designed based on a model of the unsteady aerodynamics. The controllers show good suppression of lift fluctuations at low frequencies, but as frequencies increase the control performance degrades due to fundamental physical limitations. The limitations are related to the leading edge vortex formation time.
Additional Information
© 2010 by David R. Williams. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. Published Online: 13 Nov 2012. The support for this work by the U.S. Air Force Office of Scientific Research MURI (FA9550-05-0369) with program manager Dr. Fariba Fahroo and AFOSR Grant (FA9550-09-1-0189) monitored by Dr. Doug Smith is gratefully appreciated. David Williams gratefully acknowledges partial support from the Alexander von Humboldt foundation. We also acknowledge the partial support from the Illinois NASA Space Grant Consortium for Wesley Kerstens.Attached Files
Submitted - WilliamsKerstensPfeifferEtAl2010a.pdf
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Additional details
- Eprint ID
- 97209
- Resolver ID
- CaltechAUTHORS:20190717-102319855
- FA9550-05-0369
- Air Force Office of Scientific Research (AFOSR)
- FA9550-09-1-0189
- Air Force Office of Scientific Research (AFOSR)
- Alexander von Humboldt Foundation
- Illinois Space Grant Consortium
- Created
-
2019-07-18Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Other Numbering System Name
- AIAA Paper
- Other Numbering System Identifier
- 2010-4969