Simulation and experimental studies on braking response of inertial load using magnetorheological brake

The study is aimed to develop, model and simulate a magnetorheological brake (MRB) system. The drum-type MRB comprises of a rotating disk immersed in magnetorheological fluids (MRFs) and surrounded by an electromagnet coil. The magnetized coil causes a solidification of the MR fluid so that the shear stress between the moving part and static part increases resulting in the decrement speed of the moving part. The shear stress can be varied by applying different electric current to the winding coil. In this paper, the study began from the part design using 3D modeling software, following with the finite element simulations involving the magnetostatic analysis. The mathematical model is derived based on drum-type MR brake. The simulation and experimental study on the stopping time and braking torque were also performed and compared to each other. Several performances in terms of torque versus time and speed decrement versus time were investigated by applying various electric current.