Type of Document	Master's Thesis
Author	Bail, Thomas R.
URN	etd-3210192049721391
Title	A Disturbance-Rejection Problem for a 2-D Airfoil Exhibiting Flutter
Degree	Master of Science
Department	Mathematics
Advisory Committee	Advisor Name Title Dr. John Burns Committee Chair Dr. Robert Rogers none Dr. Terry Herdman none
Keywords	LQG H flutter singular values
Date of Defense	1997-04-21
Availability	unrestricted
Abstract Flutter suppression is a problem of considerable interest in modern avionics. Flutter is a vibration caused by energy in the airstream being absorbed by a non-rigid wing. Active control is one possible method of suppressing flutter. However, due to unmeasurable aerodynamic-lag states, developing an active control using full-state feedback is not viable. The use of a state-estimator is a more practical way of developing active controllers. In this paper we investigate two control methods using state-estimators. We also use simple models of disturbances to test attenuation and robustness of each control method. Finally, a method of quantitative robust analysis is reviewed and then applied to each of the controlled systems.
Files	Filename       Size       Approximate Download Time (Hours:Minutes:Seconds)     28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access    etd.pdf 2.89 Mb 00:13:23 00:06:53 00:06:01 00:03:00 00:00:15

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