复合馈能磁流变减振器的设计和仿真

Design and Simulation of Composite Energy Regenerative Magnetorheological Shock Absorber

为提高车辆悬架的馈能效率,针对单筒减振器需要体积补偿的特点,提出一种基于直线馈能和滚珠丝杠馈能相结合的新型单筒复合馈能磁流变减振器的结构方案,并建立相应的力学模型和馈能模型。利用MATLAB进行虚拟台架试验,研究其力学特性。将模型引入1/4车二自由度悬架系统数学模型中,使用Simulink进行随机路面仿真试验。仿真结果表明:该悬架在天棚控制下,悬架动挠度和轮胎动载荷分别降低了44.4%、28.8%;相较于直线馈能磁流变减振器,复合馈能磁流变减振器馈能效率明显提高;车辆以40 km/h的速度通过C级路面,直线馈能减振器的馈能效率为9.3%,而复合馈能减振器的馈能效率为14.6%。

In order to improve the energy regenerative efficiency of vehicle suspension,aiming at the characteristics of single cylinder shock absorber requiring volume compensation,a new single cylinder composite energy regenerative magnetorheological shock absorber was proposed based on the combination of linear energy regenerative and ball screw energy regenerative,the corresponding force model and energy regenerative model were established.MATLAB was used to conduct virtual bench test and study its mechanical characteristics.The model was introduced into the mathematical model of 1/4 vehicle with two degree of freedom semi-active suspension system,and random pavement simulation tests were performed using Simulink.The simulation results show that the dynamic deflection of the suspension and the dynamic load of the tire are reduced by 44.4%and 28.8%respectively under the control of the ceiling;compared with linear energy regenerative magnetorheological shock absorber,the energy regenerative efficiency of composite energy regenerative magnetorheological shock absorber is obviously improved;under the condition that the vehicle passes the C-class road surface at the speed of 40 km/h,the energy regenerative efficiency of the linear energy regenerative shock absorber is 9.3%,while that of the composite energy regenerative shock absorber is 14.6%.