Research On Self-Powered Vehicle MR Damper Inergrated With Permanet Magnet Linear Generator

Intelligentization and integration are the development trend of the vehicle chassiscontrol system, magnetorheological(MR) semi-active suspension system has greatlyimproved the vehicle’s running comfort and handling stability by virtue of its excellentperformance. In recent years, with the growing demand of energy and the aggravationof global energy shortage, self-powered teachnology has become a focused issue whichstudied by scholars and researchers all over the world. If design a MR damper whichintergrate damping character and enery supply character, not only the vibration energyof vehicle suspension can be harvested for energy saving, but also the reliablity ofsystem can be improved. Research on self-powered MR damper could enlarge theengineering application areas that has great significance for theoretical innovation andengineering application value. In this article, aiming at the research and development ofMR semi-active suspension system for centain electric vehicle, design a MR damperthat include vibration damping and enery supply features. Based on the principle ofenergy flow, find out the self-powered character of designed MR damper. By means oftheoretical and experimental research, explore the innovative design theory and methods.The main contents are as followed:①The design principles of self-prowed MR damper are proposed and itsworking theory is elaborated. Put forward a linear generator structural design methodwhich based on the quasi-Halbach array permanent magnets, and the performanceparameters formula of the generator is deduced. Established a semi-analytical model ofthe magnetic field distribution and verify its effectiveness by utilizing electromagneticfinite element calculation method to design the efficient permanent magnet lineargenerator.②In order to achive the intergration of self-powered MR damper, installefficient permanent magnet linear generator into the MR damper, design a combinedmagnetic isolation mechanism to reduce the mutual interference of damper coilmagnetic field and Permanent magnet magnetic field. Finte element analysis resultsshow that the combined magnetic isolation mechanism can effectively separate themagnetic field and reduce the mutual interference, so that rise the effenciency of eachpart of the magnetic field. ③Analysis the energy flow path of MR Damper, and the energy flow equationsare deduced. Determine the self-powered guidelines of MR damper, and establishquarter semi-active suspension system model based on the self-prowed MR damper.Design the damper controller based on general regression neural network, work out therelationship between consumed energy and harvested energy of self-powered MRDamper under different road excitation to determine the self-powered operating rangeof the designed MR damper.④The influence of structural parameters on damping characteristics and energyharvest characteristics of self-prowed MR damper is researched. Through theestablishment of multi-objective optimization model and the study of nondominatedsorting genetic algorithm II (NSGA-II), the multi-objective optimization for structuralparameters of the self-prowed MR damper is carried out. The results prove thatmulti-objective optimization could endow self-powered MR damper more outstandingcomprehensive performance.⑤The prototype of self-prowed MR damper is fabricated, and utilizeelectro-hydraulic servo vibration test stand and multi-channel digital oscilloscope tocarried out experimental research of damping characteristics and energy harvestproperties of self-prowed MR damper, to verify the effectiveness of the design theoryand method.