Research On Comprehensive Characteristics Of Vehicle Energy-feeding Suspension Based On TPMLM

The unevenness of the road surface will cause the vibration of the vehicle body.The vibration energy is converted into heat energy through the suspension damper and slowly dissipated.Under the international demand for energy saving and emission reduction,in recent years,domestic and foreign vehicle engineering fields have paid more and more attention to the suspension vibration energy recovery Reutilization technology mainly focuses on the research on the output power of converting vibration energy into electric energy.However,the addition of an energy feed device will affect the unsprung mass of the vehicle,and may cause the natural resonance frequency of the energy feed suspension system to shift,thereby affecting the suspension performance,and the current design of the energy feed device rarely considers the impact of the energy feed device on the suspension.The effect of the performance of the suspension system has not been revealed yet.This thesis mainly studies the comprehensive performance of the energy-feeding suspension system,aiming to ensure excellent suspension characteristics while obtaining the maximum feed output performance.The main research contents are as follows:Determine the design scheme of linear motor with Halbach structure,namely Tubular Permanent-Magnet Linear Machine(TPMLM).Then TPMLM design work,according to the design method of rotating motor,complete the theoretical design of Halbach structure TPMLM,and the motor finite element analysis,get TPMLM no-load characteristics and onload characteristics,verify its correctness.The mathematical model of MR suspension is established,and the vehicle 2-DOF 1/4dynamic model is modeled and simulated.The suspension performance of MR suspension system under harmonic,smooth pulse and random road spectrum excitation is obtained.After observing and analyzing the data of sprung mass acceleration,unsprung mass acceleration and suspension dynamic stroke,it is found that the resonance point of MR suspension has almost no offset,Although part of the response amplitude is slightly distorted,the ride comfort,stability and safety of the suspension system are guaranteed.Based on the Simplorer platform,the TPMLM finite element model and the MR suspension dynamics model are jointly simulated.Under the road excitation signal of harmonic,smooth pulse and random road spectrum excitation,the MR suspension is compared,and the suspension of the MR energy-feeding suspension system is analyzed.Shelf performance and vibration power generation performance.The prototype of TPMLM was made and hardware-in-the-loop experiment was carried out,and the experimental data was analyzed and compared to verify the correctness of the theoretical simulation.