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.

Sliding Mode Output Feedback Control of Vibration in a Flexible Structure

2007 ◽  
Vol 129 (6) ◽  
pp. 851-855 ◽  
Author(s):  
M. C. Pai ◽  
A. Sinha
Keyword(s):  
Output Feedback ◽  
Control Algorithm ◽  
Closed Loop ◽  
Sliding Mode ◽  
Output Feedback Control ◽  
Flexible Structure ◽  
Numerical Verification ◽  
Closed Loop System ◽  
New Approach ◽  
Small Gain

This paper presents a new approach for the robust control of vibration in a flexible structure in the presence of uncertain parameters and residual modes. The technique is based on the sliding mode control algorithm using direct output feedback and assumes that actuators and sensors are not collocated. The uncertainty matrix need not satisfy the invariance or matching conditions. The small gain theorem/μ analysis is applied to analyze the asymptotic behavior of the closed-loop system with parametric uncertainties inside boundary layers. The model of a flexible tetrahedral truss structure is used to conduct numerical verification of the theoretical analysis.

scholarly journals Robust output-feedback control for the cart–pole system: a coupled super-twisting sliding-mode approach

2019 ◽  
Vol 13 (2) ◽  
pp. 269-278 ◽  
Author(s):  
Luis Ovalle ◽  
Héctor Ríos ◽  
Miguel Llama
Keyword(s):  
Feedback Control ◽  
Output Feedback ◽  
Sliding Mode ◽  
Output Feedback Control ◽  
System A ◽  
Pole System
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