Vibration control of a flexible structure with electromagnetic actuators

Maurício Gruzman, Ilmar Santos

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Abstract

This work presents the model of a shear-frame-type structure composed of six flexible beams and three rigid masses. Fixed on the ground, outside the structure, two voltage-controlled electromagnetic actuators are used for vibration control. To model the flexible beams, unidimensional finite elements were used. Nonlinear equations for the actuator electromagnetic force, noise in the position sensor, time delays for the control signal update and voltage saturation were also considered in the model. For controlling purposes, a discrete linear quadratic regulator combined with a predictive full-order discrete linear observer was employed. Results of numerical simulations, where the structure is submitted to an impulsive disturbance force and to a harmonic force, show that the oscillations can be significantly reduced with the use of the electromagnetic actuators.
Original languageEnglish
JournalJournal of the Brazilian Society of Mechanical Sciences and Engineering
Volume38
Issue number4
Pages (from-to)1131-1142
ISSN1678-5878
DOIs
Publication statusPublished - 2016

Keywords

  • Structures
  • Vibration control
  • Electromagnetic actuators
  • Discrete linear quadratic regulator

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