A theory for structural system identification which utilizes strains and translational displacements as measured outputs is presented. The state variables of the fundamental first-order form consist of the strains and the elemental or substructural rigid-body motion amplitudes. The theory is applicable to, and to some respects, motivated by the advances and expanded use of embedded piezoelectric sensors and fiber optics. A distinct feature of the present theory is its ability to provide rotational flexibility without having to measure rotational quantities. The theory is illustrated by simple ideal examples.
Issue Section:Technical Papers
Keywords:vibrations, deformation, strain measurement, displacement measurement, fibre optic sensors, strain sensors, piezoelectric devices, intelligent sensors, identification, structural engineering, damping, rotation
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