Effect of leeward flow dividers on the wing rock of a delta wing

1994 ◽  
Vol 31 (6) ◽  
pp. 1431-1433 ◽  
Author(s):  
T. Terry Ng ◽  
Tony Skaff ◽  
John Kountz
Keyword(s):  
Delta Wing ◽  
Wing Rock

Composite adaptive posicast controller for the wing rock phenomenon in a delta-wing aircraft

2019 ◽  
Vol 233 (15) ◽  
pp. 5579-5591
Author(s):  
Amir Yousefimanesh ◽  
Alireza Khosravi ◽  
Pouria Sarhadi
Keyword(s):  
Delta Wing ◽  
Tracking Error ◽  
Adaptive Controller ◽  
Composite Model ◽  
Input Delay ◽  
Model Reference ◽  
Wing Rock ◽  
Adaptive Laws ◽  
Regulation And Tracking ◽  
Model Reference Adaptive

The nonlinear dynamic phenomenon like wing rock is one of the important issues in the high performance aircraft autopilot design. This phenomenon occurs in the form of constant amplitude oscillations in the roll dynamics, during the flight at high angles of attack (AOAs) and endangers carrying out the mission of an aircraft. In this paper, a composite adaptive posicast controller is designed for the wing rock phenomenon in a delta-wing aircraft with known input delay. The existence of the input delay besides the parametric uncertainties of the system dynamics adds to the complexity of the problem and can cause undesirable troubles in regulation and tracking performance or instability in the control system. Consequently, there is a need for a controller that can provide the stability and desirable regulation and tracking for the system. The proposed control method uses the system state forecasting and the composite model reference adaptive controller in an integrated control structure based on linear quadratic regulator (LQR). Combining the tracking error and the prediction error to form the adaptive laws in the composite model reference adaptive controller improves the characteristics of the system response and provides a better performance compared to the model reference adaptive controller in which the adaptive laws are formed only with the tracking error. Simulation results show the efficiency of the composite adaptive posicast controller in counteracting the system uncertainties in the presence of considerably large input delay cases.

Conical Euler simulation of wing rock for a delta wing planform

1991 ◽  
Vol 28 (1) ◽  
pp. 94-96 ◽  
Author(s):  
Elizabeth M. Lee ◽  
John T. Batina
Keyword(s):  
Delta Wing ◽  
Wing Rock

Effect of Vertical Strake on the Wing Rock of 80deg Delta Wing

2004 ◽  
Author(s):  
Takashi Yoshinaga ◽  
Tomoyuki Nakaji ◽  
Tadashi Horikawa ◽  
Atsushi Tate
Keyword(s):  
Delta Wing ◽  
Wing Rock

Rapid Prediction of Wing Rock for Slender Delta-Wing Configurations

1998 ◽  
Vol 35 (6) ◽  
pp. 979-981 ◽  
Author(s):  
Lars E. Ericsson
Keyword(s):  
Delta Wing ◽  
Wing Rock ◽  
Rapid Prediction

scholarly journals Finite-Time Control of Wing-Rock Motion for Delta Wing Aircraft Based on Whale-Optimization Algorithm

2021 ◽  
Vol 6 (3) ◽  
pp. 441-456
Author(s):  
Arif A. Al-Qassar ◽  
Abdulkareem Sh. Mahdi Al-Obaidi ◽  
Alaq F. Hasan ◽  
Amjad J. Humaidi ◽  
Ahmed R. Nasser ◽  
...  
Keyword(s):  
Optimization Algorithm ◽  
Finite Time ◽  
Sliding Mode ◽  
Delta Wing ◽  
Control Design ◽  
Design Parameters ◽  
Time Control ◽  
Wing Rock ◽  
Wing Rock Motion ◽  
Matlab Programming

The rise of wing-rock motion in delta-wing aircraft has an adverse effect on the manoeuvrability of aircraft and it may result in its crash. This study presents a finite-time control design to tackle the dynamic motion due to the Wing-Rock effect in delta-wing aircraft. The control design is developed based on the methodology of Super Twisting Sliding Mode Control (STSMC). The Lyapunov stability analysis has been pursued to ensure asymptotic convergence of errors and to determine the finite time. The design of STSMC leads to the appearance of design parameters, which have a direct impact on the dynamic performance of the controlled system. To avoid the conventional tuning of these parameters and to have an optimal performance of the proposed controller, a modern optimization technique has been proposed based on Wale Optimization Algorithm. A comparison study between optimal and non-optimal finite-time super twisting sliding mode controllers has been established and their effectiveness has been verified via numerical simulation using MATLAB programming format.

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