Switched nonlinear control of a VSTOL aircraft

TitleSwitched nonlinear control of a VSTOL aircraft
Publication TypeConference Paper
Year of Publication1999
AuthorsOishi, M., and C. Tomlin
Conference NameDecision and Control, 1999. Proceedings of the 38th IEEE Conference on
Pagination2685 -2690 vol.3
Keywordsaerodynamic flight envelope, aircraft control, angle of attack, approximate feedback linearization, control law, feedback, ground speed, high-dimensional system, linearisation techniques, longitudinal model, nonlinear control systems, switched nonlinear control, thrust, tracking, vectored thrust aircraft, vertical or short take-off and landing aircraft, VSTOL aircraft

A longitudinal model of a vectored-thrust Vertical and/or Short Take-Off and Landing (VSTOL) aircraft, which operates in three distinct modes, is a high-dimensional system whose performance can be enhanced with the use of switched nonlinear control. The aircraft's performance is limited by physical constraints on such parameters as ground speed, angle of attack, and thrust, which are summarized by the aerodynamic flight envelope. We specify a least-restrictive control law which will keep the aircraft within this envelope. We independently examine the aerodynamic flight envelope constraints and design the nonlinear controller for each mode using approximate feedback linearization, then combine the results to guarantee tracking within a ldquo;safe rdquo; envelope. We provide an example of switching between these modes in a short take-off maneuver based on pilot data


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