Control Law Design for Perching an Agile MAV with Articulated Wings
This paper explores the use of variable wing dihedral and variable wing twist (in conjunction with a conventional horizontal elevator) to control an aircraft performing a perching maneuver. A choice of controller architecture wherein the dihedral is employed in the forward path and the elevator and twist are employed in the feedback path, is considered. The aircraft is modeled as a multivariable linear time-varying system. A specific perching trajectory is considered; and the open-loop aircraft is longitudinally unstable for a segment of this perching trajectory and lateral-directionally unstable for the entire perching trajectory. A multivariable time-varying controller is designed to efficiently stabilize the aircraft as well as reject longitudinal-lateral-directional wind disturbances, while closely tracking the reference perching trajectory.
© 2010 American Institute of Aeronautics and Astronautics, Inc. This project was supported by the Air Force Office of Scientific Research (AFOSR) under the Young Investigator Award Program (Grant No. FA95500910089) monitored by Dr. W. Larkin. The original problem was posed by Dr. Gregg Abate (AFRL). This paper also benefitted from stimulating discussions with Mr. Johnny Evers (AFRL).
Published - gnc_perching_paper.pdf