Model predictive variable structure control with model following for forebody vortex flow control
Conference Paper
Overview
Identity
Additional Document Info
Other
View All
Overview
abstract
1999 by Daigoro Ito and John Valasek. published by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. Aircraft which are required to fly effectively at high angles-of-attack must overcome two fundamental difficulties: generally poor dynamic characteristics, especially with respect to damping, and low control authority of conventional aerodynamic effectors. One solution to improve closed-loop tracking of pilot commands is to employ a model-following controller approach, whereby an aircraft with poor dynamics at high angle-of-attack is made to track the outputs of a model of the same aircraft at low angle-of-attack, thereby emulating its good dynamics. An improved solution is the extension to combine the model-following controller with a controller that can augment the yaw control power by effectively modulating forebody pneumatic vortex flow nozzles. This paper presents the synthesis and design of both high angle-of-attack lateral/directional controllers for a generic X-29A equipped with forebody vortex flow control nozzles. Results demonstrate that both controllers are effective in improving closed-loop tracking of input commands and high angle-of-attack maneuverability, compared to a conventional flight control scheme using only aerodynamic control effectors, and without model-following.
name of conference
Guidance, Navigation, and Control Conference and Exhibit
