(1. School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;2. School of Civil Engineering, Hunan University, Changsha 410082, China)
Abstract：A semi-active improved Bang-Bang control algorithm for closed-loop cable vibration control with magnetorheological (MR) dampers is developed based on measurement displacement, where the switch time of input voltage taken as a variable. A geometrical nonlinear finite element formulation is presented and an experimental platform based on dSPACE, MATLAB/Simulink and MR dampers is established to study the performance of the semi-active control algorithms. The performance of the proposed semi-active control algorithm with MR dampers is applied numerically and experimentally to the laboratory cable, and is compared to the passive control algorithm by using MR dampers optimally tuned to the first mode. The numerical simulation and experimental study results show that the semi-active control is superior to the optimum passive control or the classical Bang-Bang control algorithm tuned to a particular mode, and the switch time of input voltage is vital.
2010, Vol. 29 
