New semi-active control strategy for vibration suppression of high-rise building

Key words:  high-rise building  tuned mass damper  magneto-rheological damper  adaptive fuzzy control  sliding mode control  Lyapunov function

Abstract:

A new semi-active control device TMMRD, which was constructed by embedding the magneto-rheological damper (MRD) into tuned mass damper (TMD), was proposed, in which the problems of both narrow frequency-domain of effective work in TMD and time-lag of control force in active mass damper (AMD) could be solved well. The discontinuous switching type of control laws of traditional sliding mode control (SMC) and uncertainty terms of equivalent control were replaced by fuzzy controller, the adaptive fuzzy control law based on the Lyapunov function was designed, the adaptive fuzzy sliding mode control (ASMC) was integrated with a modified clipped optimal (MCO) control algorithm, and then the semi-active control strategy ASMC/MCO for TMMRD was proposed. The seismic responses of a 30-storey steel frame structure with TMD, ASMC/MCO semi-active controller, ASMC active controller and linear quadratic Gaussian (LQG) active controller were computed, respectively. Computation results indicate that the robustness of ASMC controller is obviously superior to that of LQG controller. The reduction effects on seismic responses under ASMC/MCO control and ASMC control are obviously superior to those of TMD control and LQG control. The control force of ASMC/MCO controller is almost the same as that of ASMC controller.