Nonlinear controller using variable damping devices for tall buildings

摘要

This study presents a complete formulation fo a nonlinear controller using variable damping devices,which is used to contorl vibrations of building structures during large earthquakes,The control algorithm is formulated based on the idea of Lyapunov stability theory considering the inequality constraints associated with the function of the control device such that the control systme is internally stable and asymptotic.The proposed nonlinear ocntorl algorithm utilizes the full capacity of the control device to maximiz the contorl effect.Because of its practicality,a boundary layer filter is introduced to the basic formulation.The control effect and basic performance are analyzed through numerical simulations on a three-story building model for an earthquake excitation.The results show that the effect of the proposed nonlinear control algorithm becomes greater for large excitations,thus verifying its applicability to bilding structures during large earthquakes.