Research On Loader Suspension System Based On Magnetorheological Fluid Damper

With the development of China's economy and the improvement of people's living standard,people put forward higher requirements for the comfort,safety,handling and stability of the vehicle.The traditional vehicle passive suspension system can not meet the requirements of people for vehicle Requirements,and the development of the industrial revolution also prompted the field of engineering machinery on the work efficiency and safety of the higher requirements,the vehicle's semi-active suspension system is in this context came into being,and magnetorheological fluid can It has the advantages of fast response,stable operation and high safety factor.It is an ideal damper material,which can be applied to ZL50 wheel loader,and can realize loader.It can realize the change of liquid and solid state in the presence of magnetic field.The improvement of work efficiency and the safety and comfort of the staff.1.ZL50 wheel loader suspension system as the research object,mainly to solve the loader in the work of the smoothness and handling,as well as personnel comfort and other issues.The main contents are as follows:The first chapter introduces the background and significance of this paper,the current research situation of magnetorheological fluid and the research status of traditional damper and suspension system,and the existing problems,and put forward the main research contents of this paper.2.the working mode of the magnetorheological fluid dampers is discussed,and the damping force is mechanically demonstrated.The gap between the coil piston and the cylinder is obtained,the effective length of the coil piston,Its damping force size greater impact.3.the structure and magnetic circuit of the magnetorheological fluid damper are designed on the basis of the second chapter,and the multi-objective optimization is carried out.The damper is modeled in Matlab / simulink,and the characteristic analysis The4.the performance evaluation indexes of the suspension system are put forward,and the dynamic modeling of the pavement excitation model,the semi-active suspension system and the traditional passive suspension system is carried out,and the factors influencing the system response are analyzed.5.the semi-active control characteristics of the suspension system are analyzed,and the quadratic optimal control,fuzzy control and fuzzy neural network control strategy are simulated and analyzed respectively.Compared with the traditional passive suspension,semi-active control Compared with the traditional passive suspension system,the suspension system has improved the stability and safety of the vehicle body,and the fuzzy neural network control has the most obvious improvement.Finally,it summarizes the main contents and conclusions of this paper,and puts forward the shortcomings of this paper to look forward to the next step.