Structural real time control using fluid magnetorheologic damper

• Autor(a) principal: Neto, Camilo Mesquita [UNESP]
• Data de Publicação: 2008
• Outros Autores: Santos, Rodrigo Borges [UNESP], Bueno, Douglas Domingues [UNESP], Marqui, Clayton Rodrigo [UNESP], Lopes Jr., Vicente [UNESP]
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.sem.org/Proceedings/ConferencePapers-Paper.cfm?ConfPapersPaperID=20155; http://hdl.handle.net/11449/70826
• topic: Identification method; Linear Matrix Inequalities (LMI); Magnetorheological damper; Prediction Error Methods(PEM); Seismic input; Semi-active controller; Magneto-rheological dampers; Prediction error method; Semi-active controllers; Controllers; Damping; Exhibitions; Linear matrix inequalities; Magnetorheological fluids; Real time control; Structural analysis; Structural dynamics; Numerical methods

In the last decades there was a great development in the study of control systems to attenuate the harmful effect of natural events in great structures, as buildings and bridges. Magnetorheological fluid (MR), that is an intelligent material, has been considered in many proposals of project for these controllers. This work presents the controller design using feedback of states through LMI (Linear Matrix Inequalities) approach. The experimental test were carried out in a structure with two degrees of freedom with a connected shock absorber MR. Experimental tests were realized in order to specify the features of this semi-active controller. In this case, there exist states that are not measurable, so the feedback of the states involves the project of an estimator. The coupling of the MR damper causes a variation in dynamics properties, so an identification methods, based on experimental input/output signal was used to compare with the numerical application. The identification method of Prediction Error Methods - (PEM) was used to find the physical characteristics of the system through realization in modal space of states. This proposal allows the project of a semi-active control, where the main characteristic is the possibility of the variation of the damping coefficient.