Gain-scheduled linear fractional control for active shutter suppression
by
J.M. Barker, G.J. Balas and P.A Blue
in
AIAA Journal of Guidance, Dynamics and Control, vol. 22, no. 4, July-August, pp. 507-512, 1999.
Category: Journal Article
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Abstract:
A gain-scheduled controller for active utter suppression of the NASA Langley Research Centers 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 system over a wide range of Mach and dynamic pressure is demonstrated. Closed-loop stability 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, but the gain-scheduled controller outperforms the linear controller throughout the operating region.
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