Design,Analysis And Experimental Study Of Multi-Disk Magnetorheological Brake For Vehicles

In this paper,the multi-disc automobile magnetorheological brake is studied by means of numerical analysis,simulation verification and experimental research,which provides the theoretical basis for the development of the magnetorheological brake for vehicles.The main contents of the study are as follows:A multi-disc magnetorheological braking device is designed according to actual braking requirements of the vehicle.Firstly,the basic structure of the brake is designed according to the shear mode of magnetorheological fluid.Secondly,the simulation model of braking torque and magnetic induction intensity is obtained by numerical analysis.Finally,magnetic induction intensity distribution at the working gap is obtained by using ANSYS software,and the structure of the brake is optimized according to the simulation results.The results show that the theoretical braking torque of the brake can reach the designed value.The transient temperature field and thermal stress distribution of the brake under different braking modes are obtained by the multi-physical field simulation analysis based on the workbench platform.In order to optimize the heat dissipation performance of the brake,the heat dissipation pipe is set in its interior,and the flow field simulation analysis is carried out.Two different control strategies,conventional PID control and fuzzy PID control,are proposed for the instability of the braking torque.The two control strategies are simulated and analyzed by simulink and the results show that the fuzzy PID controller has better dynamic and static characteristics.In order to study the no-load characteristic,braking performance,output braking torque characteristic and temperature characteristic of the brake,the experimental platform is set up and the data acquisition software is compiled.The results show that the designed magnetorheological brake has good braking performance,and the experimental data can be used as a reference for the design and development of the magnetorheological brake.