A study on the efficiency improvement of a passive oil damper using an MR accumulator

作者：Yun Young Won; Lee Seong Min; Park Myeoung Kwan^*

来源：Journal of Mechanical Science and Technology, 2010, 24(11): 2297-2305.

DOI：10.1007/s12206-010-0801-x

• Magneto-rheological fluids
• Oil damper
• Floating piston
• Accumulator

This study describes the development, modeling, and testing of a hybrid damper for semi-active suspension The goal of this study is to improve the performance of conventional passive oil dampers using a magneto-rheological (MR) accumulator that consists of a gas accumulator and an MR device The level of damping is continuously variable by means of control of the applied current in an MR device that is fitted to a floating piston that separates the gas and oil chamber A small MR device is used to resist the movement of the floating piston At first, a mathematical model that describes all flows within the damper is formulated and developed in Matlab/Simulink The MR device is also devised A mathematical model is adopted to characterize the performance of the device The formulas derived for the different components of the damper force are combined into a full damper model Then, the applicability of the MR device to a conventional passive oil damper is tested in a manufactured test environment and evaluated in terms of the damping force vs the piston velocity From the results, It is possible to ascertain the MF device's capability to work as a damper that can supply a variable damping force Moreover, this research affords a lot of new information about the applicability of MR devices and improvement of the damping force

• 出版日期2010-11