高速机车悬架系统磁流变阻尼器试验建模与半主动控制

针对磁流变阻尼器的高速机车横向半主动悬架系统,设计并制作了一个剪切阀式磁流变阻尼器,在液压伺服试验机上对磁流变阻尼器的阻尼特性进行了试验研究;提出了一种修正的Bouc-Wen模型,并用优化方法确定了模型的参数:建立了采用磁流变阻尼器的高速机车横向半主动悬架系统模型,运用中心流形定理分析了半主动悬架系统的稳定性;提出了一种半主动控制策略,仿真验证了采用磁流变阻尼器的高速机车横向半主动悬架系统的有效性。

EXPERIMENTAL MODELING AND ITS APPLICATION FOR SEMI-ACTIVE CONTROL OF HIGH-SPEED TRAIN SUSPENSION SYSTEM

A semi-active control of high-speed train suspension system with magnetorheological (MR) damper is presented. At first a MR damper working in flow mode is designed. Performance testing is done for this damper with INSTRON machine. Then a mathematical model, modified Bouc-Wen model, is adopted to characterize the performance of the MR damper, with optimization method and experimental results of MR damper, the coefficients of the model are determined. A scaled half train model is set up including the model of the MR damper and a semi-active control strategy is adopted to control the vibration of suspension system. By center manifold theorem, the stability of nonlinear systems with MR damper is studied. Simulation results show that with the semi-active control the vibration of suspension system is well controlled.