Simulation of Magneto-Rheological Brake for Automotive Application

In this paper Magneto-Rheological Brake model has been proposed that can provide the braking torque required for stopping a two-wheeler vehicle under consideration. Firstly the braking torque required to stop the vehicle is calculated analytically. Then appropriate design parameters have been selected and a model has been developed in MATLAB/SIMULINK software to achieve the same braking torque. The braking torque has been calculated at vehicle speed of 70 km/hr. and for stopping time of 2(sec), 3(sec), 4(sec) and 5(sec) respectively. The maximum braking torque at stopping time of 5 seconds is 28.3485 Nm, at the rear wheel. The proposed MR model generates the required braking torque. The MR fluid used is Lord Corporation’s MRF-132DG. The use of Magneto-rheological fluids in the braking application has been restricted, as the torque produced is not as much as required for braking, due to limited shear stress the MR fluid can sustain. This paper implicates that MR brake torque capacity can be increased by proper design considerations. Here we have increased the number of discs for the same purpose.