Browsing by Subject "Spacecraft"

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    Boundary control of a Timoshenko beam attached to a rigid body: planar motion
    (Taylor & Francis, 1991) Morgül, Ö.
    A flexible spacecraft modelled as a rigid body which rotates in an inertial space is considered; a light flexible beam is clamped to the rigid body at one end and free at the other end. The equations of motion are obtained by using the geometrically exact beam model for the flexible beam, and it is then shown that under planar motion assumption, linearizationof this model yieldsthe Timoshenko beam model. It is shown that suitable boundary controls applied to the free end of the beam and a control torque applied to the rigid body stabilize the system. The proof is obtained by using a Lyapunov functional based on the energy of the system. © 1991 Taylor and Francis Ltd.
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    Orientation and control of a flexible spacecraft: planar motion
    (IEEE, 1990) Morgül, Ömer
    We consider a flexible spacecraft modeled as a rigid body which rotates in an inertial frame; a light flexible beam is clamped to the rigid body at one end and free at the other end. We assume that the flexible spacecraft performs only planar motions. We pose two control problems; namely, the orientation and the stabilization of the system. It is shown that suitable boundary controls applied to the free end of the beam and suitable control torques applied to the rigid body solve the problems posed above.