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Your search keyword '"MacKunis, William"' showing total 2 results
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2 results on '"MacKunis, William"'

1. On Progress in Exploring Controlled Viscous Limit-Cycle Oscillations in Modified Glauert Airfoil

Author

1068769, 1664145, 0910255, Deweese, Ethan, Nguyen, Lap, Vataker, Erik, MacKunis, William, Golubev, Vladimir, Efrati, Ron, Stalnov, Oksana, 1068769, 1664145, 0910255, Deweese, Ethan, Nguyen, Lap, Vataker, Erik, MacKunis, William, Golubev, Vladimir, Efrati, Ron, and Stalnov, Oksana

Abstract

The paper reports on the progress in the development of a novel robust, nonlinear flow control technology that employs an array of synthetic-jet actuators (SJAs) embedded in 2-DOF, elastically mounted, optimized Modified Glauert (MG) airfoil design in order to control limit cycle oscillations (LCO) at low subsonic flow regimes. The focus here is on the conceptual design of the wind energy harvesting system that employs, e.g., a piezoelectric device to extract energy from plunging LCO, with the closed-loop controller being capable to sustain the required LCO amplitudes over a wide range of wind speeds. The current high-fidelity studies first include validation of the static-airfoil aerodynamic predictions against results obtained from the concurrent experimental campaign. Next, a set of parametric 1-DOF and 2-DOF numerical analyses examine open-loop and closed-loop LCO control strategies that employ the ability of MG airfoil to sustain LCO at subcritical velocities due to natural separation-induced flutter.

Published
2024

2. Robust Image-Based Visual Servo Control of an Uncertain Missile Airframe

Author

Aygun, Murat Tunca, Aygun, Murat Tunca, Aygun, Murat Tunca, and Aygun, Murat Tunca

Subjects
Guided missiles Guidance systems., Guided missiles Control systems., Flight control., Guidance systems (Flight), Systems engineering., Missiles Systèmes de guidage., Missiles Systèmes de commande., Systèmes de commande (Vol), Systèmes de guidage (Vol), Ingénierie des systèmes., systems engineering., Flight control, Guidance systems (Flight), Guided missiles Control systems, Guided missiles Guidance systems, Systems engineering
Abstract

"A nonlinear vision-based guidance law is presented for a missile-target scenario in the presence of model uncertainty and unknown target evasive maneuvers. To ease the readability of this thesis, detailed explanations of any relevant mathematical tools are provided, including stability definitions, the procedure of Lyapunov-based stability analysis, sliding mode control fundamentals, basics on visual servo control, and other basic nonlinear control tools. To develop the vision-based guidance law, projective geometric relationships are utilized to combine the image kinematics with the missile dynamics in an integrated visual dynamic system. The guidance law is designed using an image-based visual servo control method in conjunction with a sliding-mode control strategy, which is shown to achieve asymptotic target interception in the presence of the aforementioned uncertainties. A Lyapunov-based stablity analysis is presented to prove the theoretical result, and numerical simulation results are provided to demonstrate the performance of the proposed robust controller for both stationary and non-stationary targets"--Leaf 5.

Published
2024

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