Abstract
AbstractIn the last years the study of periodic linear systems has been considered of fundamental interest because periodic variations happen in a great range of physical systems; an example of this kind of system is the ship-mounted crane. In a ship-mounted crane, due to the sea oscillations, the phenomenon of parametric resonance is presented. The principal contribution of this note is to avoid the parametric resonance and attenuate the load oscillations in a crane with parametric excitation. We present a simplified model for a ship-mounted crane and based in the model we design a second order sliding mode controller. The control objective is tracking trajectories and oscillation attenuation. We present simulations and experiments.
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