Dynamic flight maneuvering using trapped vorticity flow control

Date

2008-12-01

Author

Muse, Jonathan A.
Kutay, Ali Türker
Brzozowski, Daniel P.
Culp, John R.
Calise, Anthony J.
Glezer, Ari

Metadata

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Closed-loop feedback control is used in a series of wind tunnel experiments to effect commanded 2-DOF maneuvers (pitch and plunge) of a free airfoil without moving control surfaces. Bi-directional changes in the pitching moment over a range of angles of attack are effected by controllable, nominally-symmetric trapped vorticity concentrations on both the suction and pressure surfaces near the trailing edge. Actuation is applied on both surfaces by hybrid actuators that are each comprised of a miniature [O(0.01c)] obstruction integrated with a synthetic jet actuator to manipulate and regulate the vorticity concentrations. In the present work, the model is trimmed using position and attitude feedback loops that are actuated by servo motors and a ball screw mechanism in the plunge axis. Once the model is trimmed, the position feedback loop in the plunge axis is opened and the plunge axis is controlled in force mode so to maintain the static trim force on the model, and alter its effective mass. Meanwhile the servomotor in the pitch axis is only used to alter the dynamic characteristics of the model in pitch, and to introduce disturbances. Attitude stabilization and position control of the model is achieved by closing the position loop through the flow control actuators using a model reference adaptive controller designed to maintain a specified level of tracking performance in the presence of disturbances, parametric uncertainties and unmodeled dynamics associated with the flow. The controller employs a neural network based adaptive element and adaptation laws derived by a Lyapunov-like stability analysis of the closed loop system.

URI

https://arc.aiaa.org/doi/10.2514/6.2008-522
https://hdl.handle.net/11511/70906

DOI

https://doi.org/10.2514/6.2008-522

Conference Name

46th AIAA Aerospace Sciences Meeting and Exhibit (7- 10 January 2008)

Collections

Department of Aerospace Engineering, Conference / Seminar

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Experimental trapped vorticity flight control using an augmenting error minimization adaptive law Muse, Jonathan A.; Kutay, Ali Türker; Calise, Anthony J. (2008-01-01) Closed-loop feedback control is used in a series of wind tunnel experiments to effect commanded 2-DOF maneuvers (pitch and plunge) of a free airfoil without moving control surfaces. The objective is to achieve control bandwidths that are beyond those achievable with mechanical control surfaces. Bi-directional changes in the pitching moment over a range of angles of attack are effected by controllable, nominally-symmetric, trapped vorticity concentrations on both the suction and pressure surfaces near the tr...
Closed-loop aerodynamic flow control of a free airfoil Brzozowski, Daniel P.; Culp, John R.; Kutay, Ali Türker; Muse, Jonathan A.; Glezer, Ari (null; 2008-12-01) Transitory flow arising from the dynamic response of a free-moving airfoil model to commanded pitch and plunge maneuvers is investigated in wind tunnel experiments. The airfoil is mounted on a 2-DOF traverse and its trim and dynamic characteristics are controlled using position and attitude feedback loops that are actuated by servo motors. Commanded maneuvers are achieved without moving control surfaces using bi-directional changes in the pitching moment over a range of angles of attack that are effected by...
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Citation Formats

J. A. Muse, A. T. Kutay, D. P. Brzozowski, J. R. Culp, A. J. Calise, and A. Glezer, “Dynamic flight maneuvering using trapped vorticity flow control,” Reno, NV, United States, 2008, Accessed: 00, 2021. [Online]. Available: https://arc.aiaa.org/doi/10.2514/6.2008-522.