charged system search algorithm (css)

Structural profitable control is a subject of the recent challenges in designing of various mechanical systems. Recently, semi-active tuned mass dampers (SATMD) developed to attenuate vibration of building structures due to the external disturbances. In this paper, a mass damper that works parallel with a semi-active magneto-rheological (MR) damper employed to reduce a ten story building structure responses in four earthquake excitations. An optimized fuzzy controller by using charged system search (CSS) algorithm calculates proper input voltage of the MR damper to increase performance of the SATMD in reducing vibration of the building structure. The results showed better performance of the optimized fuzzy controller in comparison with conventional fuzzy controllers and passive TMD.