摘要
将电压的切换时间作为可调参数,提出了基于位移反馈的改进的Bang-Bang控制算法。建立了磁流变阻尼器对拉索减振的半主动控制的有限元模型以及基于dSPACE、MATLAB/Simulink和磁流变阻尼器等工具的半主动控制试验平台,从有限元数值仿真和试验实测两方面分析了改进的Bang-Bang控制算法和最优被动控制对拉索减振效果的影响。理论计算和试验实测结果都表明改进的Bang-Bang控制对拉索的减振效果优于最优被动控制,同样优于经典的Bang-Bang控制算法;半主动控制时阻尼器输入电压的切换时间对拉索系统的减振效果至关重要。
A semi-active improved Bang-Bang control algorithm for a closed-loop cable vibration control with magnetorheological(MR) dampers was developed based on displacement feed back,taking the switch time of input voltage as a variable.A geometrical nonlinear finite element formulation was presented and an experimental platform based on dSPACE,MATLAB/Simulink and MR dampers was established to study the performance of the semi-active control algorithm.The performance of the proposed semi-active control algorithm with MR dampers was applied numerically and experimentally to the laboratory cable,and was compared with the passive control algorithm by using MR dampers optimally tuned to the first mode.The numerical simulation and experimental study results showed that the proposed semi-active control is superior to the optimal passive control or the classical Bang-Bang control algorithm tuned to a particular mode,and the switch time of input voltage is vital.
出处
《振动与冲击》
EI
CSCD
北大核心
2010年第2期60-63,88,共5页
Journal of Vibration and Shock
基金
国家自然科学基金重点资助项目(50738002)
国家自然科学基金资助项目(50578063)
湖南省教育厅资助项目(09B034)
