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Closed Loop Control of a Wing's Lift for 'Gust' Suppression

Kerstens, Wesley and Williams, David and Pfeiffer, Jens and King, Rudibert and Colonius, Tim (2010) Closed Loop Control of a Wing's Lift for 'Gust' Suppression. In: 5th Flow Control Conference, 28 June-1 July 2010, Chicago, IL.

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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.

Item Type:Conference or Workshop Item (Paper)
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URLURL TypeDescription Paper Paper
Colonius, Tim0000-0003-0326-3909
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.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-05-0369
Air Force Office of Scientific Research (AFOSR)FA9550-09-1-0189
Alexander von Humboldt FoundationUNSPECIFIED
Illinois Space Grant ConsortiumUNSPECIFIED
Subject Keywords:Flow Control
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AIAA Paper2010-4969
Record Number:CaltechAUTHORS:20190717-102319855
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97209
Deposited By: Melissa Ray
Deposited On:18 Jul 2019 16:26
Last Modified:16 Nov 2021 17:29

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