Adaptive control of aircraft lateral directional axis using subspace stabilization

A linear adaptive control for the F-14 aircraft lateral-directional axis using disturbance-observers and subspace-stabilization theory is presented. Disturbance accommodating observers are used to estimate and cancel out the combined effects of nonlinear, uncertain and off-nominal terms in real-time...

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Bibliographic Details
Main Authors: Tournes, C., Landrum, B.
Format: Conference Proceeding
Language:English
Subjects:
Actuators
Adaptive control
Aerospace control
Aircraft propulsion
Control systems
Error correction
Motion control
Numerical simulation
Open loop systems
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Summary:A linear adaptive control for the F-14 aircraft lateral-directional axis using disturbance-observers and subspace-stabilization theory is presented. Disturbance accommodating observers are used to estimate and cancel out the combined effects of nonlinear, uncertain and off-nominal terms in real-time. Subspace stabilization techniques are used to steer the system "error-state" to a certain subspace representing the desired servo-tracking error behavior, while controlling the subsequent motion of the error-state on the subspace to the origin. The results obtained are compared with previous results obtained using gain scheduling and H/sub /spl infin//. Numerical simulation results demonstrate that the ideal closed-loop responses of the rolling rate and sideslip angle are adequately tracked and that the controller effectively decouples the two channels.
DOI:10.1109/SSST.2001.918558