| Magneto-rheological semi-active suspension is a kind of controllable suspension that is developing rapidly.It is widely welcomed for its fast response,continuously adjustable damping,and low energy consumption.The change of the damping characteristics of the magnetorheological fluid requires external power supply.In order to reduce the consumption of external power,this research designed an energy-fed magneto-rheological semi-active suspension structure.This structure can recover and utilize the vibration energy caused by the vehicle running on uneven roads to supply the magneto-rheological semi-active suspension,thereby reducing the consumption of external electric energy.This can not only fundamentally solve the problem of energy consumption of the suspension,but also help improve the ride and comfort of the vehicle.Based on the analysis of the structure principle of the energy-feeding magneto-rheological semi-active suspension,the principle prototype of the shock absorber was trial-produced.The parameters of the structure were identified.The parameters of the magn eto-rheological hyperbolic tangent model were determined,and the simulation performance of the structure's indicator was simulated and analyzed.Thc sensitivity analysis was carried out,and the existing structure was improved to improve the control accuracy of the magnetorheological shock absorber.The damping model of the magnetorheological semi-active suspension and the passive suspension was established,and the damping of the two suspensions was simulated and compared,A 1/4 vehicle 3 degree-of-freedom model of the energy-feeding mechanism was established,and the speed characteristics of the mechanism were simulated and analyzed.A finite element model of the energy-feeding mechanism was built,and the energy-feeding voltage of the energy recovery mechanism was analyzed.The energy feeding model of the magneto-rheological semi-active suspension was established to analyze the energy feeding effect under different road surface excitations.The characteristic experiment of the suspension was carried out on the two-degree-of-freedom suspension experimental platform.The simulation results show that the main factor that affects the magnetic induction of the damping channel is the energy-feeding magnet.The effect of the energy-feeding motor in the improved structure on the magnetic induction of the damping channel is only 0.14%,which effectively improves the control accuracy.Compared with the passive suspension,the vehicle dynamic indicators are reduced by 24.32%,15.43%,and 20.56%,respectively,which significantly improves the ride comfort and comfort of the vehicle.The maximum energy-feeding voltage of the energy-feeding motor is 1.141V,and the energy-feeding effect is good.Under the condition of a vehicle speed of 60 km/h,the average energy feed efficiency is 26.91%.The test results show that the shock absorber dynamometer is smooth and round,which is basically consistent with the simulation value. |
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