Design and Analysis of Magneto-Rheological (MR) Damper

Semi active suspension based MR systems have been creating a lot of interest in suspension designers and researchers all over the world in last decade as they are mechanically simple as compared to active devices. The single piston cylinder MR damper is designed as it is most suitable in Automobile suspensions. Also different structural and magnetic parameters for MR damper are calculated. In MR damper, valve geometry is of particular importance as it creates enough pressure drops across the device to maximize Damping force. 2D axisymmetric model is developed on commercially available FEA software as cost for manufacturing test MR damper is high. Magnetic flux density across valve geometry is of special interest as it maximizes the overall Damping force produced. The value of Magnetic flux density obtained via FEA analysis is validated with calculated values. This paper provides a systematic approach of designing the MR Damper used in Automobile suspensions.