Active Stall Flutter Suppression for a Revised Leishman–Beddoes Model
Publication: Journal of Aerospace Engineering
Volume 37, Issue 1
Abstract
This paper proposes a nonlinear disturbance observer (NDO)–based sliding mode control (SMC) method to the problem of stall flutter suppression for a revised Leishman–Beddoes (L–B) model. To capture accurate aerodynamic characteristics whilst reducing the plant model mismatch, the dynamics of the separation point and the shift of the aerodynamic center are analyzed to improve the structure of the L–B model. Based on this revised L–B model, an active flutter suppression problem that includes aerodynamic disturbances and actuator dynamics is addressed. The inclusion of the actuator dynamics means that the aerodynamic disturbance from the flow separation, induced by the revised L–B model, is considered as an “unmatched” disturbance. To counteract the effect of unmatched disturbances, an NDO-based sliding mode control scheme is applied to suppress stall flutter and to ensure rapid reference tracking performance in both steady and unsteady flow conditions. Simulation results show the improvements of the proposed revised L–B model via a comparative analysis. In addition, the efficacy of the proposed stall flutter suppression scheme is demonstrated.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
Financial support from the program of the China Scholarships Council (CSC) is acknowledged.
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Information & Authors
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Published In
Journal of Aerospace Engineering
Volume 37 • Issue 1 • January 2024
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Dec 3, 2022
Accepted: Aug 14, 2023
Published online: Oct 11, 2023
Published in print: Jan 1, 2024
Discussion open until: Mar 11, 2024
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