In order to maximize the controllability of magnetorheological (MR) mount for engines, a novel (MR) mount with an internal bypass (MRM-IB), which provides particular advantages of large dynamic stiffness range, small field-off dynamic stiffness and long available stroke under full vibration frequency range, is proposed and investigated in this paper. The proposed MRM-IB consists of a main rubber spring unit for supporting static load and a MR damping unit for mechanical energy dissipation. The MR damping unit is composed of a piston assembly, a MR fluid chamber and an annular MR fluid channel sandwiched by two concentric cylinders, that is, the inner and outer cylinders. Electromagnetic coil winding is wound on the outside of the inner cylinder and continuous damping/dynamic stiffness of the MRM-IB is tuned by the applied current in the coils. Structural principle of the magnetic circuit of the proposed MRM-IB is validated and analyzed, and the mathematical model of the controllable damping force is then established. In addition, a frequency-based piecewise controller and a fuzzy controller for a specific MR semi-active automotive mount system are designed, and the theoretical simulation and the experimental tests of the system are conducted, compared and analyzed.

中文翻译：

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发动机磁流变半主动安装系统：原型设计和测试

为了最大限度地提高发动机磁流变 (MR) 支架的可控性，一种具有内部旁路 (MRM-IB) 的新型 (MR) 支架具有动态刚度范围大、磁场关闭动态刚度小和使用寿命长的独特优势本文提出并研究了全振动频率范围内的冲程。拟议的 MRM-IB 由一个用于支撑静载荷的主橡胶弹簧单元和一个用于机械能耗散的 MR 阻尼单元组成。MR阻尼单元由活塞组件、MR流体室和夹在两个同心圆柱体即内外圆柱体之间的环形MR流体通道组成。电磁线圈绕组缠绕在内圆柱体的外侧，MRM-IB 的连续阻尼/动态刚度通过线圈中施加的电流进行调整。对所提出的MRM-IB的磁路结构原理进行了验证和分析，然后建立了可控阻尼力的数学模型。此外，针对特定的MR半主动悬挂系统设计了基于频率的分段控制器和模糊控制器，并对系统进行了理论仿真和实验测试，并进行了比较和分析。