ASPECTS OF PASSIVE CONTROL OF STRUCTURAL VIBRATIONS

A preliminary attempt to organize innovative strategies such as Base I solation, Supplemental Energy Dissipation, Tuned Mass Damping and othe r combined approaches recently proposed by the authors, in a more gene ral theory of Structural Control, is presented. To visualize the relat ionships between dynamic variables and subsystems, the black-diagram r epresentations are used in order to obtain the regulation properties o f the systems. It has been proven that the Base Isolation technique ap plies an open-loop control law and that Tuned Mass Damping and Supplem ental Energy Dissipation realize closed-loop control laws. The block-d iagram of the new combined strategy Base Isolation and Tuned Mass Damp ing is presented. The objectives of the regulating criteria are also d iscussed in order to shape the dynamic response in the frequency domai n. The H-2 and H-infinity methods are considered as optimal control al gorithms.