Browsing by Author "Fahmi, Jean-Michel W."

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    Experimental Validation of Port-Hamiltonian-Based Control for Fixed-Wing Unmanned Aircraft
    Fahmi, Jean-Michel W.; Gresham, James L.; Woolsey, Craig A. (American Institute of Aeronautics and Astronautics, 2023-06)
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    Port-Hamiltonian Flight Control of a Fixed-Wing Aircraft
    Fahmi, Jean-Michel W.; Woolsey, Craig A. (IEEE, 2022-01)
    This brief addresses the problem of stabilizing steady, wing level flight of a fixed-wing aircraft to a specified inertial velocity (speed, course, and climb angle). The aircraft is modeled as a port-Hamiltonian system and the passivity of this system is leveraged in devising the nonlinear control law. The aerodynamic force model in the port-Hamiltonian formulation is quite general; the static, state feedback control scheme requires only basic assumptions concerning lift, side force, and drag. Following an energy-shaping approach, the static state feedback control law is designed to leverage the open-loop system’s port-Hamiltonian structure in order to construct a control Lyapunov function. Asymptotic stability of the desired flight condition is guaranteed within a large region of attraction. Simulations comparing the proposed flight controller with dynamic inversion suggest it is more robust to uncertainty in aerodynamics.
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    Remote Uncorrelated Pilot Input Excitation Assessment for Unmanned Aircraft Aerodynamic Modeling
    Gresham, James L.; Simmons, Benjamin M.; Fahmi, Jean-Michel W.; Hopwood, Jeremy W.; Woolsey, Craig A. (American Institute of Aeronautics and Astronautics, 2023-05)