Abe Naoto    Department   Undergraduate School  , School of Science and Technology    Position   Professor
Language	English
Publication Date	2013/09
Type	International Conference
Peer Review	Peer reviewed
Title	Variable Stiffness System for Semi-Active Vibration Control by Frequency
Contribution Type	Co-authored (other than first author)
Journal	Proc. of International conference on Instrumentation, Control, Information Technology and System Integration (SICE Annual Conference 2013)
Volume, Issue, Page	pp.923-928
Author and coauthor	Yusuke Suzuki and Naoto Abe
Details	Seismic waves close to the resonant frequency of a structure cause the structure to exhibit large vibrations. The resonant frequency of the structure is determined by the value of stiffness (spring constant). As a method to shift the resonance frequency, the dynamic absorber using additional mass is well known; however, its performance is restrictive. A semi-active control is proposed by varying the stiffness, on the basis of the frequency, to shift the resonant frequency of the structure from that produced by the earthquake. Damping the effect of the semi-active control was verified by simulations and experiments using some seismic waves.