Semi-active switching vibration control for dynamic absorber based on the seismic frequency

Dynamic absorber is a famous strategy to suppress a vibration with an additive mass without using any kind of energy. The performance is restrictive than active vibration control devices, however, it is practical use. The resonance curve of the dynamic absorber has two same level peaks which depends on damping coefficients. Hard-damper of the absorber decrease the both peaks. In anti-resonance frequency the gain of soft-damper is lower than hard-damper case. In this paper, an semi-active switching control for the dynamic absorber is considered on the basis of frequency responses by using band pass filter. The semi-active switching control designed adequately has good performance against all type of earthquake by using simulation and experimentation