Because the stiffness and damping of traditional suspensions cannot change along with vehicle’s movement state,the technology of electro-hydrostatic actuator (EHA)in the field of aerospace was introduced and a new kind of vehicle active suspen-sion was put forward based on EHA.Compared with the traditional hydraulic servo active suspension,which uses hydraulic valves,the structure of EHA active suspension is simple and reliable.The models of active suspension with EHA were estab-lished by AMEsim.It mainly includes the sprung mass,non-sprung mass,the road input,spring and EHA actuator.Ground-hook controller and LQG controller for EHA active suspension were designed by using Matlab/Simulink software.The control-lers were integrated with the AMEsim suspension model and the co-simulations were performed.The results show that LQG ac-tive suspension with EHA is better than the ground-hook active suspension.Under the LQG control,the body acceleration re-duces by 26.2%,the suspension dynamic deflection reduces by 19.8%,and the tire dynamic load reduces by 18.4%.As a result, the ride comfort and stability are improved obviously.%针对传统悬架的刚度和阻尼不能随汽车行驶状况变化而调节的弊端，将航空领域先进的电动静液压作动器（electro-hy-drostatic actuator，EHA）技术应用于汽车悬架控制，设计了基于 EHA 的电动静液压新型主动悬架结构。与传统采用各类阀件的液压伺服车辆主动悬架相比，EHA 主动悬架结构简单、可靠性高。利用 AMEsim 建立了二自由度 EHA 主动悬架模型，该模型主要由簧载质量、非簧载质量、路面输入、弹簧和 EHA 作动器构成。同时，利用 Matlab／Simulink 软件设计了 EHA 主动悬架地棚控制器和线性二次型（LQG）最优控制器。将 AMEsim 模型导入 Matlab／Simulink 中，开展了 EHA 主动悬架的地棚控制和LQG 控制联合仿真研究。仿真结果表明，相比地棚控制，LQG 控制效果较好，车身加速度降低26．2％，悬架动挠度降低19．8％，轮胎动载荷降低18．4％，很大程度上改善了汽车的平顺性和操纵稳定性。
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