This paper describes the development and analysis of gain-scheduled, multi-variable Hinfinity control law for the conversion of a linear parameter varying (LPV) model of a high-speed autonomous rotorcraft vehicle (HARVee), an experimental tilt-wing aircraft. Tilt-wing aircraft combine the high-speed cruise capabilities of a conventional airplane with the vertical takeoff and station keeping abilities of a helicopter by rotating their wings at the fuselage. Changing between cruise and hover flight modes in mid-air is referred to as the conversion process, or simply conversion. A nonlinear aerodynamic model was previously developed that captures the unique dynamics of the tilt-wing aircraft. An Hinfinity design methodology was used to develop linear controllers along various operating points of a conversion trajectory. The development of these control systems was governed not only by performance specifications at each particular operating point, but also by the unique requirements of a gain-scheduled conversion control system. The performance of the resulting conversion closed-loop systems is analyzed in the frequency and time domains. Performance robustness with respect to variation in the location of the center of gravity (eg) has been studied.
Robust LPV Hinfinity-gain-scheduled hover-to-cruise conversion for a tilt-wing rotorcraft in the presence of CG variations
IEEE Conference on Decision and Control, 46 ; 2773-2778
2008
6 Seiten, 11 Quellen
Conference paper
English
Robust Hinfinity gain-scheduled conversion for a tilt-wing rotorcraft
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