Robust output feedback control of an aeroelastic system using modeling error compensation

2000 ◽  
Author(s):  
Rong Zhang ◽  
Sahjendra Singh
Keyword(s):  
Feedback Control ◽  
Output Feedback ◽  
Error Compensation ◽  
Output Feedback Control ◽  
Modeling Error ◽  
Aeroelastic System

Robust output feedback control for aeroelastic vibration suppression of a 2-DOF airfoil under quasi-steady flow

2017 ◽  
Vol 24 (19) ◽  
pp. 4604-4619 ◽  
Author(s):  
K Zhang ◽  
S Manaffam ◽  
P Marzocca ◽  
A Behal
Keyword(s):  
Feedback Control ◽  
Output Feedback ◽  
Vibration Suppression ◽  
Sliding Mode ◽  
Output Feedback Control ◽  
Leading Edge ◽  
Control Surface ◽  
Closed Loop System ◽  
Aeroelastic System ◽  
Surface Deflections

In this paper, a robust output feedback control design is developed for suppression of aeroelastic vibration of a 2-DOF nonlinear wing section system. The aeroelastic system operates in a quasi-steady aerodynamic incompressible flowfield and is actuated using a combination of a leading-edge (LE) and a trailing-edge (TE) flap. By only utilizing measurements of pitching and plunging deflections, an innovative Lyapunov-based procedure is used to design sliding mode control inputs for the LE and TE control surface deflections. The closed-loop system is shown to have semi-global asymptotic stability even in the presence of model uncertainty and unknown external gust loading. Extensive simulation results under a variety of scenarios show the effectiveness of the control strategy.

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