Vortex Model Based Adaptive Flight Control Using Synthetic Jets
Author(s)
Muse, Jonathan A.
Tchieu, Andrew A.
Kutay, Ali T.
Chaundramohan, Rajeev
Leonard, Anthony
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Abstract
A simple low-order model is derived for developing flight control laws for controlling
the longitudinal dynamics of an aircraft using synthetic jet type actuators. 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 obstruction integrated with a synthetic jet actuator
to manipulate and regulate the vorticity concentrations. In previous work, a simple model
was derived from a reduced order vortex model that includes one explicit nonlinear state
for fluid variables and can be easily coupled to the rigid body dynamics of an aircraft. This
paper further simplifies this model for control design. The control design is based on an
output feedback adaptive control methodology that illustrates the effectiveness of using the
model for achieving flight control at a higher bandwidth than achievable with typical static
actuator assumptions. A unique feature of the control design is that the control variable is
a pseudo-control based on regulating a control vortex strength. Wind tunnel experiments on
a unique dynamics traverse verify that tracking performance is indeed better than control
designs employing standard actuator modeling assumptions.
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Date
2009-08
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Proceedings