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Journal Articles Structural Control and Health Monitoring Year : 2018

A new semi-active control based on nonlinear inhomogeneous optimal control for mixed base isolation

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Duc Chuan Vu
  • Function : Author
Sette Diop

Abstract

This paper presents a control algorithm for seismic mixed base isolation, combining passive isolators and semi-active viscous dampers. The objective is to limit base displacement while avoiding undesirable amplification of the response of the non-isolated modes. To this end, the proposed algorithm takes into account the constraints on the damping coefficient of the semi-active damper and information on the excitation. It is based on the approximate iterative solution, at each control time step, of a nonlinear inhomogeneous constrained optimal control problem. An autoregressive model is used to obtain, at each control time step, a prediction of the upcoming excitation in a short time interval ahead. Numerical simulation results demonstrate the efficacy of the above method, especially in improving floor response spectra, and its superiority with respect to clipped-optimal algorithms.
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Dates and versions

hal-01643533 , version 1 (21-11-2017)

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Duc Chuan Vu, Ioannis Politopoulos, Sette Diop. A new semi-active control based on nonlinear inhomogeneous optimal control for mixed base isolation. Structural Control and Health Monitoring, 2018, 25 (1), pp.e2032. ⟨10.1002/stc.2032⟩. ⟨hal-01643533⟩
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