车辆主动悬架用电机作动器的研制

Development on Electromotor Actuator for Active Suspension of Vehicle

针对现有车用液力式主动悬架作动器普遍存在的响应慢、能耗大、蓄能效率低和结构复杂等不足,提出采用滚珠螺旋传动式无刷电机作动器的电机蓄能式主动悬架,并对该主动悬架的结构原理和电机作动器的创新设计方案。并以某中级轿车半独立后悬架作为试验对象,对电动机作动器的弹性元件、滚珠丝杠和无刷电动机等重要部件进行结构设计以及对输出特性进行分析推导。试制出电机作动器的功能样机,并对电气特性和被动响应特性进行测试分析,初步验证了该电机作动器的可行性和有效性,同时还阐述在有待进一步改进的设计缺陷,以及尚须进一步测试的主动控制响应和电磁蓄能特性等性能指标。

In view of the shortcomings of actuator for hydraulic active suspension of vehicle, such as slow response, high energy consumption, low efficiency of energy accumulation, and complex structure, a novel design scheme of active suspension with energy accumulation by electromotor actuator （mainly composed of a brushless motor and a ball screw） is presented. Taking the semi-independent rear suspension of a certain intermediate car as example, structural designs of the important components of electromotor actuator, such as the elastic elements, ball screw and brushless motor are carried out, and the output characteristics are analyzed and derived. A functional prototype of actuator is trial-produced, and the electric and passive response characteristics of actuator are tested and analyzed. The feasibility and effectivity of actuator are proved. Moreover, the design defects that need to be further improved, and the performance indexes that need to be further tested, such as the active response and electromagnetic energy accumulation, are expounded.