Abstract:
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This article proposes an adaptive predictive control
design technique to mitigate the displacement in a hysteretical
base-isolated system seismically perturbed. The obtained predictive
control law is based on the measurable linear part of the
base-isolated model, and programmed over a prediction-time of
one-sampling-discrete-time period. Two main contributions are
highlighted. First, we use a delta-modulator with hysteresis to
avoid the zero-crossing in the control law caused by one estimated
parameters. Second, we implement a dynamic hysteretic model
based on relays as a command governor able to create new
hysteretic reference trajectories. This is realized to robustly
compensate the hysteretic behavior of the structure under control.
Finally, and according to numerical experiments, our control
design presents a good performance from the displacement
control point of view in comparison to the open-loop system
response, where the El Centro earthquake is invoked. |