There are three types of two-terminal mechanical elements, namely the inerter, the spring, and the damper in the vehicle ISD suspension system, and how to design the suspension structure has drawn much attention in automotive engineering fields. Due to the advantage of using the external electrical network to simulate the corresponding mechanical impedance output, a ball-screw mechatronic inerter is adopted in the optimal design procedure in this paper. A half vehicle dynamic model considering the vehicle body vertical motion and pitch motion is established, and the optimal design methodology of the vehicle mechatronic ISD suspension is proposed by using the structure-immittance approach to ensure the simplicity of the suspension structures. The dynamic performance indexes constraints are taken into account, and the optimal structures are discussed in detail. Numerical simulations results show that, the dynamic performance indexes, namely the RMS (root-mean square) of the vehicle body vertical acceleration and the RMS of the pitch motion acceleration of the mechatronic ISD suspensions can be reduced by 31% and 35% without constraints, and 18% and 15% with constraints by comparing to the passive suspension system. The structure-immittance approach can be easily adopted in the vehicle suspension structural design, and the research fruits will provide a new thought for the application of the inerter element in automotive engineering.

车辆ISD悬架系统中的两端机械元件有惰轮、弹簧和阻尼器三种，如何设计悬架结构在汽车工程领域备受关注。由于利用外部电气网络来模拟相应机械阻抗输出的优势，本文在优化设计过程中采用了滚珠丝杠机电一体化惯性器。建立了考虑车身垂直运动和俯仰运动的半车动力学模型，提出了车机电一体化ISD悬架的优化设计方法，采用结构-导抗法，保证了悬架结构的简单性。考虑了动态性能指标约束，并详细讨论了最佳结构。数值模拟结果表明，机电一体化ISD悬架的车身垂直加速度RMS（均方根）和俯仰运动加速度RMS可以无约束地降低31%和35% , 和 18% 和 15% 与被动悬挂系统相比有约束。结构导抗方法在汽车悬架结构设计中易于采用，研究成果将为惰性元件在汽车工程中的应用提供新的思路。即车体垂直加速度的RMS（均方根）和机电一体化ISD悬架的俯仰运动加速度的RMS无约束可降低31%和35%，有约束可降低18%和15%。到被动悬挂系统。结构导抗方法在汽车悬架结构设计中易于采用，研究成果将为惰性元件在汽车工程中的应用提供新的思路。即车体垂直加速度的RMS（均方根）和机电一体化ISD悬架的俯仰运动加速度的RMS无约束可降低31%和35%，有约束可降低18%和15%。到被动悬挂系统。结构导抗方法在汽车悬架结构设计中易于采用，研究成果将为惰性元件在汽车工程中的应用提供新的思路。