Abstract
A hybrid vibration control system using magnetorheological (MR) shock absorbers composed of MR dampers and MR elastomers is proposed for structural vibration. A Bouc–Wen model is developed to describe the hysteresis of the MR shock absorbers. The experimental results validate that the proposed Bouc–Wen model can represent the dynamic behavior of the MR shock absorbers. Based on the proposed model, a force tracking control of the MR shock absorbers is developed. Finally, the hybrid vibration control system for a seven-story building, including the force tracking control and a fuzzy PD control, is proposed. Numerical simulation results verify the effectiveness of the proposed control method.
Highlights
Based on the above analysis, the goal of this paper is to build a hybrid vibration control system using MR shock absorbers composed of MR dampers and MR elastomers for structural vibration
Where zd and zd are the displacement and velocity of the damper, respectively; π is the hysteresis operator; “⋅” at the top of variables represents the first order derivative of the variables with respect to time; i is the current applied to the MR damper; kd(i), cd(i) and ch(i) are the stiffness, damping, and hysteresis functions of the efficient current, respectively; F0 is the initial force; and ρ, β, γ, and n are the parameters of the Bouc–Wen hysteresis operator
It is reasonable to believe that the Bouc–Wen model can accurately model the dynamic behavior of the MR damper
Summary
Magnetorheological (MR) materials hold promise for vibration control of civil structural since their properties can be adjusted in real time, and, unlike active devices, they do not inject energy into the system being controlled and have relatively low power requirements.. If MR dampers and MR elastomers can be used together to control structural vibration, it is expected to greatly reduce the response of buildings under seismic excitation. Due to their highly nonlinear dynamic behavior, it is very difficult to obtain an inverse MR material mathematical model that has an explicit relationship between the desired force and input current. This force–current relationship is required especially for structural vibration control design using MR dampers and elastomers..
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
