Investigation of limit cycle oscillations for a wing section with nonlinear stiffness

2004 ◽  
Vol 8 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Daniel Berggren
Keyword(s):  
Limit Cycle ◽  
Nonlinear Stiffness ◽  
Limit Cycle Oscillations ◽  
Wing Section

Structured Model Reference Adaptive Control for a Wing Section with Structural Nonlinearity

2002 ◽  
Vol 8 (5) ◽  
pp. 553-573 ◽  
Author(s):  
Jeonghwan Ko ◽  
Thomas W. Strganac ◽  
John L. Junkins ◽  
Maruthi R. Akella ◽  
Andrew J. Kurdila
Keyword(s):  
Adaptive Control ◽  
Limit Cycle ◽  
Model Reference Adaptive Control ◽  
Limit Cycle Oscillations ◽  
Structured Model ◽  
Model Reference ◽  
Wing Section ◽  
Comparison Results ◽  
Structural Nonlinearity ◽  
Model Reference Adaptive

The recently derived structured model reference adaptive control (SMRAC) method is considered for the active suppression of limit cycle oscillations for a typical wing section with a structural nonlinearity. The SMRAC method uses the specific structure of the equations of motion governing general mechanical systems. This adaptive control method is implemented and tested in wind tunnel experiments to validate the performance. For comparison, results obtained with adaptive feedback linearization are also presented. It is shown that the derived SMRAC is advantageous in that it suppresses limit cycle oscillations at higher velocities, and also it can rigorously treat actuator saturation a priori.

Simulation of aircraft-pilot coupling as limit-cycle oscillations

1998 ◽  
Author(s):  
Guofeng Lin ◽  
Edward Lan ◽  
Jay Brandon
Keyword(s):  
Limit Cycle ◽  
Limit Cycle Oscillations

Sensitivity analysis of limit cycle oscillations

2012 ◽  
Vol 231 (8) ◽  
pp. 3228-3245 ◽  
Author(s):  
Joshua A. Krakos ◽  
Qiqi Wang ◽  
Steven R. Hall ◽  
David L. Darmofal
Keyword(s):  
Sensitivity Analysis ◽  
Limit Cycle ◽  
Limit Cycle Oscillations
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