Linear parameter-varying-based transition flight control design for a tilt-rotor aircraft

Author:

Qu Shen123,Zhu Guoming123ORCID,Su Weihua123ORCID,Shan-Min Swei Sean123

Affiliation:

1. Department of Mechanical Engineering, Michigan State University, East Lansing, MI, USA

2. Department of Aerospace Engineering and Mechanics, The University of Alabama, Tuscaloosa, AL, USA

3. Department of Aerospace Engineering, Khalifa University, Abu Dhabi, United Arab Emirates

Abstract

This paper presents the development of novel transition flight controllers for a class of urban air mobility aircrafts configured with a fixed-wing and six distributed electric rotor assemblies. Only the two tilt-rotors are utilized for thrust vectoring during transition flight from hovering to steady-level flight, while the four lift-rotors are modulated with aerodynamic lift induced by fixed-wing to maintain stable altitude-hold. Three tractable tilt-rotor articulation profiles are proposed by taking into account of various aircraft and hardware constraints. Given a predefined nominal tilting profile, a family of linear models is obtained by linearizing the nonlinear aircraft model at multiple tilt-rotor angular positions along the tilting profile. Using tilt-rotor angular position as a scheduling parameter, a discrete-time linear parameter-varying model can be constructed, which is then used to develop a novel transition flight control architecture that integrates the adaptive model predictive control law with feedforward effect of the dynamic reference compensation. The simulation results demonstrate the effectiveness of proposed transition flight controllers and its robustness subject to external disturbance.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Aerospace Engineering

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