Research On Energy Recovery Characteristics Of Parallel-feed Suspension With Few Degree Of Dof

The suspension system of automobile mainly uses elastic and damping elements to attenuate or reduce the body impact caused by uneven road,so as to reduce the body vibration and improve the comfort and safety of vehicle driving.The traditional passive shock absorber cannot meet the ride comfort requirements of modern vehicles.Although the active suspension system can improve the driving performance of vehicles,it needs a lot of energy to control the vibration.The energy recovery shock absorber is introduced into the suspension system.The shock absorber can convert the vibration energy of the system into electrical energy through the motor and make use of it,so as to reduce the energy consumption of the active suspension system.In this paper,a kind of energy recovery damper based on parallel operation mechanism is studied by simulation and experiment.The specific work is as follows:The overall structure and working principle of the energy recovery shock absorber with few degrees of dof are described,and the kinematic analysis of the mechanism is carried out.On the basis of the whole energy recovery system,the optimal external resistance of the whole energy recovery system is determined.After that,the type selection of the damper motor is analyzed.After the motor model is determined,the expression of the electromagnetic damping coefficient of the damper is determined according to the operation relationship of the low degree of freedom parallel mechanism.Based on the energy recovery shock absorber,a 1/4 vehicle 2-dof suspension dynamic model and a Simulink model are established.According to the energy flow,the energy conversion relationship of each link of the energy recovery system is analyzed.Using the dynamic model of a 1/4 vehicle 2-dof suspension dynamic model,the relationship between the speed of the road,the level of the road,the frequency and amplitude of the excitation circle and the energy efficiency of the shock absorber under rode white noise and sinusoidal excitation,respectively.Determine the influence of the vehicle's sprung mass,unsprung mass,suspension spring stiffness,and tire stiffness on the power dissipation of the shock absorber and the final energy recovery power.Introduce the performance of the power indicator,and determine the relationship the between the dynamic characteristics of the shock absorber indicator characteristics of the energy recovery shock absorber based on the area of the indicator diagram.Simulink simulation was used to analyze the pros and cons of dynamic characteristics between energy recovery shock absorbers and traditional passive shock absorbers.Design and test the 1/4 vehicle suspension shock absorber test bench.Use the designed test bench to test the energy recovery performance of the energy recovery shock absorber and test results Perform analysis.