Proceedings ArticleDOI
Active flutter suppression via gain-scheduled linear fractional control
Jeffrey M. Barker,Gary J. Balas,P.A. Blue +2 more
- Vol. 6, pp 4014-4018
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TLDR
In this paper, a gain-scheduled controller for active flutter suppression of the NASA Langley Research Center's Benchmark Active Controls Technology wing section is presented, which is modeled as a linear system whose parameters depend in a linear fractional manner on Mach and dynamic pressure.Abstract:
A gain-scheduled controller for active flutter suppression of the NASA Langley Research Center's Benchmark Active Controls Technology wing section is presented. The wing section changes significantly as a function of Mach and dynamic pressure and is modeled as a linear system whose parameters depend in a linear fractional manner on Mach and dynamic pressure. The resulting gain-scheduled controller also depends in a linear fractional manner on Mach and dynamic pressure. Stability of the closed-loop is demonstrated via time simulations in which both Mach and dynamic pressure are allowed to vary in the presence of input disturbances. The linear fractional gain-scheduled controller and an optimized linear controller (designed for comparison) both achieve closed-loop stability throughout the operating region.read more
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Journal ArticleDOI
Adaptive Feedforward Control for Gust Load Alleviation
TL;DR: In this article, an adaptive feed-forward control framework is proposed for the suppression of aircraft structural vibrations induced by gust perturbations to increase the resilience of the control law in the presence of the aeroelastic/aeroservoelastic interactions.
Proceedings ArticleDOI
Adaptive Feedback Control Algorithm for Flutter Boundary Expansion
TL;DR: In this article, the dual-Youla parametrization is implemented as an essential part to estimate the open loop aeroelastic model from the closed loop experiment and a new controller is designed using the standard controller design techniques to extend the flutter envelope boundary.
Journal ArticleDOI
Flutter Analysing Over an Aircraft Wing During Cruise Speed
TL;DR: In this article, a subsonic passenger aircraft in its cruise speed was analyzed using optimization tools CFD and FEA tools, and the results were exposed computationally including both fluid and structural interaction problem, which can able to predict accurately the nature of an aircraft during its flutter.
Journal ArticleDOI
Review of Aeroelasticity Testing Technology
TL;DR: Aeroelasticity is the study of the mutual interaction that takes place among the inertial, elastic and aerodynamic forces acting on the structural members exposed to an airstream and the influence of this study on the design as mentioned in this paper.
References
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Book
Robust and Optimal Control
TL;DR: This paper reviewed the history of the relationship between robust control and optimal control and H-infinity theory and concluded that robust control has become thoroughly mainstream, and robust control methods permeate robust control theory.
General Theory of Aerodynamic Instability and the Mechanism of Flutter
TL;DR: In this paper, the Kutta condition was used to analyze the aerodynamic forces on an oscillating airfoil or an air-foil-aileron combination of three independent degrees of freedom.