高效馈能半主动悬架设计与性能分析

为改善齿轮齿条式馈能悬架的阻尼特性和馈能特性,在普通齿轮齿条式馈能悬架的基础上,采用钕铁硼永磁发电机、变速机构、换向机构和冲击保护装置,设计了高效馈能半主动悬架,并进行了仿真分析和试验研究.与普通齿轮齿条式馈能悬架相比,该高效馈能半主动悬架发电机转子的转动惯量减小71%,体积减小约40%,节省励磁功率20~30 W,死区由-0.22~0.22 m/s减小到-0.04~0.04 m/s,阻尼特性和馈能特性得到改善,能量转换效率由20%左右提高到50%以上;与被动悬架相比,该高效馈能半主动悬架使汽车的轮胎动载荷、簧载质量的垂直加速度和悬架动挠度的最大值均下降20%以上. 

Design and Performance Analysis of Efficient Semi-active Energy-Regenerative Suspension

On the basis of normal gear and rack type suspension,an efficient semi-active energy-regenerative suspension was designed to improve the damping properties and energy-regenerative characteristics of gear and rack type suspension.This suspension consists of a NdFeB permanent magnet generator,a variable-speed mechanism,a reversing gear and an impact protection device.The simulation and experiment for the efficient semi-active suspension were made.The research results show that compared with the gear and rack type suspension,the rotary inertia and volume of generator rotor of the semi-active energy-regenerative suspension are reduced by 71% and about 40% respectively,exciting power is saved by 20 to 30 W,and dead zone is decreased from-0.22-0.22 m/s to-0.04-0.04 m/s.Furthermore,damping and energy-regenerative characteristics are improved,and energy conversion efficiency raises from about 20% to over 50%.Compared with the passive suspension,the maximum value of dynamic tyre load,the maximum vertical acceleration of sprung mass and suspension dynamic deflection all are decreased by over 20%.