CAJ | 학술논문

针对目前电液伺服主动悬架所存在的稳定性差、结构复杂及成本高等缺点，将先进的电动静液压 EHA（electro-hydro-static actuator）技术应用于汽车主动悬架设计中，设计了 EHA 自供能量式汽车主动悬架。根据该主动悬架的工作原理与结构特点，建立了 EHA 主动悬架系统的键合图模型；利用 Matlab／Simulink 软件，在随机路面谱输入下，对该悬架系统进行了天棚控制、地棚控制仿真策略的对比研究。在理论分析的基础上，进行了 EHA 自供能量式主动悬架样机的选型、设计与试制，并研制了试验台架系统。试验结果表明：天棚控制 EHA 主动悬架作用下，车身加速度下降13．28％，悬架动挠度下降10．50％，验证了所设计主动悬架系统的可行性与控制效果。
침대목전전액사복주동현가소존재적은정성차、결구복잡급성본고등결점，장선진적전동정액압 EHA（electro-hydro-static actuator）기술응용우기차주동현가설계중，설계료 EHA 자공능량식기차주동현가。근거해주동현가적공작원리여결구특점，건립료 EHA 주동현가계통적건합도모형；이용 Matlab／Simulink 연건，재수궤로면보수입하，대해현가계통진행료천붕공제、지붕공제방진책략적대비연구。재이론분석적기출상，진행료 EHA 자공능량식주동현가양궤적선형、설계여시제，병연제료시험태가계통。시험결과표명：천붕공제 EHA 주동현가작용하，차신가속도하강13．28％，현가동뇨도하강10．50％，험증료소설계주동현가계통적가행성여공제효과。
Traditional electro-hydrostatic servo suspension structure is relatively complicated,unstable and expensive.A kind of vehicle self-powered active suspension is designed based on EHA in the field of aerospace.The operating mechanisms and structure features are illustrated in this paper.By applying bond graph method,bond graph models for EHA active suspension system are established.By using Matlab/Simulink,the comparison of sky-hook controller and ground-hook controller with elec-tro-hydrostatic actuator (EHA)active suspension is made.Simulations are performed under random road spectrum inputs.Ac-cording to the theoretical analysis,the EHA physical prototype and experimental rig system are designed and made.Under the input of sinusoidal road,EHA active suspension with sky-hook control is tested.The results show that under sky-hook control, body acceleration reduces by 13.28%,and suspension dynamic deflection reduces by 10.50%.Experimental results for the EHA active suspension are consistence with the simulation results,which verify the applicability of the model and the effectiveness of the control system.