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سال انتشار: 1391
محل انتشار: بیستمین کنفرانس سالانه مهندسی مکانیک
تعداد صفحات: 4
چکیده:
In this paper, design considerations for building an automotive magnetorheological (MR) brake are discussed. The proposed MR brake consists of several rotating disks immersed in an MR fluid and an enclosed di-magnetic stator. When current is applied to the electromagnet, the MR fluid solidifies as its yield stress varies as a function of the magnetic flux intensity that is applied. This controllable yield stress produces shearfriction on the rotating disks, and by this means, generates the braking torque. In this work, practical design criteria such as material selection, magnetic circuit design, and different working surface area with various shapes, viscous torque generation, applied current density, and MR fluid selection are considered to select a basic automotive MR brake configuration. Then, a finite element analysis is performed to analyze the resulting magnetic circuit and magnetic flux intensity distribution within the MR brake configuration and by this, calculating generated torque on the brake disks. This paper, proposed a feasible automotive MR brake that can be replaced by conventional hydraulic brake system. However, the generated braking torque is still less than that of a conventional hydraulic brake, which indicates that an optimization in brake configuration is required
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