Nasu T,Kobori T,Takahashi M,et al.Active variable stiffness system with non-resonant control[J].Earthquake Engineering and structural Dynamic,2001,30(11):1597-16145.
[3]
Loh Chinhsiung,Ma Mingjin.Control of seismically excited building structures using variable damper systems[J].Engineering,Structure,1996,18(3):292-287.