【摘要】 半主动控制与被动控制和主动控制相比具有可靠性高、能耗低和容易实现的特点,正成为一种颇具前景的悬挂振动控制方式。利用磁流变液的流变特性制成的磁流变阻尼器是一种性能优良的半主动控制装置。本文首先建立了采用磁流变阻尼器的三自由度机车车辆横向半主动悬挂系统模型;在对磁流变阻尼器的阻尼特性进行试验研究的基础上,提出了一种磁流变阻尼器的数学模型,并用优化方法确定了的模型参数;而后提出了一种半主动控制策略,得到了系统的振动响应;与被动悬挂相比,采用磁流变阻尼器的机车横向半主动悬挂系统可显著降低悬挂质量的加速度值。更多还原

【Abstract】 Semi-active control system are becoming more popular because they offer the reliability of passive systems and the versatility of active control systems without imposing heavy power demands.It has been found that magneto-rheological(MR) fluids can be designed to very effective vibration control actuators.MR fluid damper is a semi-active control device that uses MR fluids to produce controllable damping force.The objective of this paper is to study a three-degree-of-freedom suspension system with a MR fluid damper for the purpose of vibration control.A mathematical model of MR fluid damper is adopted.The model is compared with experimental results for a prototype damper through finding suitable model parameters.In this study,a semi-active control algorithms is developed,in order to investigate the performance of the suspension system.The vibration response are evaluated in both time and frequency domains.Compared to the passive system,the acceleration of the sprung mass,and suspension travel is significantly reduced for the system with a controlled MR damper.更多还原