Modelling and experimental evaluation of a variable stiffness MR suspension with self-powering capability

作者：Xiaojing Zhu, Donghong Ning, Zhuonan Hao, Hui Huang, Yanzhi Sun, Hong Jia, S. S. Sun, Tianhong Yan, Weihua Li · 发表于：Journal of Intelligent Material Systems and Structures · 年份：2021 · DOI：10.1177/1045389x20986994 · 被引用次数：6 · 研究领域：Vibration Control and Rheological Fluids、Seismic Performance and Analysis、Structural Engineering and Vibration Analysis

This paper presents the modelling and experimental evaluation of a semi-active vehicle suspension installed with a self-powered MR damper which is able to perform variable stiffness. Its variable stiffness feature as well as the self-powering capability was evaluated and verified using a hydraulic Instron test system. The testing results show that the stiffness of the damper is dependent on the current which can be generated by the self-powering component. A mathematic model was established to describe the dynamic properties of the MR damper and its power-generating capability. Finally, the self-powered MR suspension was installed on a quarter car test rig for its vibration isolation evaluation. A controller based on the short-time Fourier transform (STFT) was developed for the stiffness control. The evaluation result illustrates that the proposed MR damper can reduce the acceleration and displacement of the sprung mass by 16.8% and 21.4% respectively, compared with the passive system.