Multi-domain Simulation And Optimization Design Of Magnetorheological Brake

Magnetorheological fluid brake is a new brake-by-wire resulting from the research ofx-by-wire system. The braking torque is generated by the new intelligent materialmagnetorheological fluid. Magnetorheological fluid can achieve transformation between Newtonianfluid state semi-solid or solid state and vice versa under the applied magnetic field, and exhibitcontrollable yield strength.Since the magnetorheological brake is controlled by the current, they areable to improve to brake response speed, thereby increase traffic safety.Magnetorheological fluids and devices has made great progress,but it still encounters manydifficulties and shortcomings up to now. Therefore, its application needs further research. Thispaper focuses on disk-type magnetorheological brake used in micro cars and launches a study of thefollowing content.First, it summarises the research and development of magnetorheological fluids and devices,and fully understand the rheological properties and mechanism of MRF.Secondly, it analyses the function and characteristics of magnetorheological brake andcombines with the classical theory and model of MRF then choses a magnetorheological fluidwhich is suitable for vehicle brake. And according to those, the braking torque ofmagnetorheological fluid brake is deduced. It completes the design of magnetic circuit and electriccircuit after elaborating the basic principles and considerations of magnetic circuit. It also selectsvarious materials of the component.Then,8major parameters of magnetorheological fluid brake are designed. Magnetic circuitdesign proves reasonable through modeling, solving and analysing magnetorheological brakeprototype using software ANSYS.Then, based on APDL, this paper has established a mathematical model of magnetorheologicalfluid brake optimization design and optimized for solving in the ANSYS. Compared with the initialdesign, the results of optimal design is more reasonable and then point out that the main coolingmethod of brake is air-cooled.Based on the optimal results, magnetorheological fluid brake isdesigned and manufactured.Finally, in order to verify the design performance of magnetorheological fluid brake, amagnetorheological fluid brake performance test bench was designed and built. And then I havedone the relationship experiments between current and torque experiments. Compared with theexperimental results, it indicates that the optimization design of magnetorheological fluid brake ismore reasonable and its performance is relatively stable, which has good application prospects. Thispaper provides a comprehensive summary and points out that a few follow-up questions need afurther study.