Design And Optimization Of The Magneto-rheological Damper

With the advantages of big damping force, high adjustment coefficient, fast response, low power consumption, high safety and simple structure, the MR Damper has became an excellent actuator of semi-active suspension.Vehicles'maneuverability, comfort and shooting accuracy can be improved by the research and development of Magnetorheological Semi-active suspension system for military vehicle. Besides, the battlefield survivability of military vehicles can also be improved in order to attack the enemy more effectively. It has been very important to develop intelligent MRF semi-active suspension system with proprietary intellectual property rights for the improvement of armored vehicles'technology and market competitiveness.This paper, structure, key parameters, magnetic circuit of the MRF damper which act as semi-active suspension system actuator of military vehicle have been designed. The main works of this dissertation are following:â‘ With the requirements of performance and size limitation for the MRF damper of special vehicles, the design has been determined on the basis of deep studies of MRF damper's working model; the formula used for calculating damping force has been derived based on MRF Bingham plastic model;â‘¡The method of design for MRF damper has been described, including the design methods of damper structural, the principles and method of circuit design. The influence of key structural parameters which caused by MRF damper's static and dynamic characteristics has been analyzed; material has been selected with the consideration of magnetic properties and strength. The MRF damper for special vehicles been designed;â‘¢ANSYS is used to carry out the analysis of MRF damper magnetic circuit for special vehicles, which can be used to prove the rationality of magnetic circuit. The magnetic circuit structure size has been modified based on the magnetic flux lines displayed in the ANSYS, which makes the performance of dynamic characteristic improved;â‘£A new method in which key parameters of MRF damper are optimized by APDL has been proposed based on the traditional method, and it achieved good results.