Analysis of Magneto Rheological Fluid Damper with Various Piston Profiles
Md. Sadak Ali Khan1, A.Suresh2, N.Seetha Ramaiah3
1Md. Sadak Ali Khan, Associate professor, Dept of Engg. M.J.C.E.T.,  Banajara Hills, Hyderabad, India.
2A. Suresh, Principal, Sreyas Institute of Engineering and Technology, Bandlaguda, Hyderabad, India.
3N. Seetha Ramaiah, Professor, Dept of  Engg.  M.J.C.E.T. Banajara Hills, Hyderabad, India.
Manuscript received on November 23, 2012. | Revised Manuscript received on December 06, 2012. | Manuscript published on December 30, 2012. | PP: 77-83 | Volume-2, Issue-2, December 2012.  | Retrieval Number: B0813112212 /2012©BEIESP

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Abstract: Control of seismic, medical and automobile vibrations represents a vast area of research that is growing rapidly. Magneto rheological (MR) dampers are a new class of devices that match well with the requirements and constraints of applications, including the necessity of having very low power requirements. The performance of MR damper depends on its magnetic and hydraulic circuit design. In this paper a finite element model is used to examine and investigate the 2- D axi-symmetric MR damper. Nine different configurations of piston for MR damper are simulated in order to investigate how the profile of the piston affected the maximum pressure drop that the damper could provide. The piston velocity and the input current to the coil are varied to evaluate the resulting change in magnetic flux density (B) and pressure drop (ΔP). The simulation results of the different configuration of piston show that the performance of single coil with filleted piston ends was better than that of other configurations for the same magnitude of input current and piston velocity. 
Keywords: Magneto-rheological (MR) fluid, MR damper, Magnetic flux density, magnetic field intensity.