| Summary: | 碩士 === 國立臺北科技大學 === 車輛工程系所 === 101 === MRF is an intelligent liquid with outstanding performance. By the change of magnetic field, it can produce different shear stress. The relationship between shear stress and the magnetic field of MR fluid is near linear. The transformation is also quick and reversible. Those excellent characteristics enable the possibility for industrial application, such as vehicles, biomedical, robotics, etc.
Tradition MR brake contains a cylinder with coil winded surrounding. The MRF is filled between stator and the inner disk. MR fluid is place under the magnetic field created by the coil which is weak, thus resulting less resistance.
This research presents a new design of magnetorheological resistance to improve disadvantage of tradition MR brake. MR fluid is place between a stator that is placed inside the surrounded rotor. The internal structural of stator is created by multiple T-shaped poles. The magnetic flux direction of each pole is opposite to the adjacent poles. The active chaining areas for the MR fluid are greatly increased, to improve significant brake torque. This research designs the 3D model of overall structure of the MR resistance. Magnetic circuit analysis was used to predict optimized sizes of the various parts. Program was employed to establish control platform and performed test and analysis to the system. Multi-pole MR resistance with exterior rotor was designed to effectively employ MR fluid in generating resistant torque.Its torque-to-volume ratio is better than one of conventional MR brake. Therefore, this study provides a better design for MR brake research.
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