Abstract
This paper presents an optimal design of a magnetorheological (MR) brake for amiddle-sized passenger car which can replace a conventional hydraulic disc-type brake. Inthe optimization, the required braking torque, the temperature due to zero-field friction ofMR fluid, the mass of the brake system and all significant geometric dimensions areconsidered. After describing the configuration, the braking torque of the proposed MRbrake is derived on the basis of the field-dependent Bingham and Herschel–Bulkleyrheological model of the MR fluid. The optimal design of the MR brake is thenanalyzed taking into account available space, mass, braking torque and steadyheat generated by zero-field friction torque of the MR brake. The optimizationprocedure based on the finite element analysis integrated with an optimization tool isproposed to obtain optimal geometric dimensions of the MR brake. Based onthe proposed procedure, optimal solutions of single and multiple disc-type MRbrakes featuring different types of MR fluid are achieved. From the results, themost effective MR brake for the middle-sized passenger car is identified and somediscussions on the performance improvement of the optimized MR brake are described.
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