基于作动力反馈控制的电磁反力式混合型主动悬架

Analysis of a Hybrid Passive-active Vehicle Suspension Based on the Actuator Force Feedback Control

提出一种同时含有被动和主动结构的新型汽车主动悬架,与现有主动悬架的最大不同点在于由电磁反力作动器产生的主动控制力仅作用于汽车非悬挂质量。首先,探讨电磁反力作动器的被动特性和以作动器作动力为PI反馈控制量的主动特性,作动器的主动特性显示较好的"天棚"阻尼特性。其次,建立对作动器作动力进行反馈控制的混合型主动悬架1/4车辆模型,并进行特性仿真试验。结果表明,采用作动器作动力进行反馈控制的新型主动悬架效果较好,能够同时改善悬架系统车轮环节共振高频段的平顺性、车轮接地性和减少悬架弹簧的变形。

To provide a favorable compromise between the vehicle tiding comfort and tire road holding of passive suspensions, a hybrid passive-active suspension which consists of passive suspension and a type of electromagnetic counter-force actuator was provided. But different from other active suspension systems, the active force of hybrid suspension is added only to the unsprung mass. Taking the actuator force as a feedback measure, a PI control strategy was used for the analysis of the actuator character. The active actuator force showed a good sky-damping to the input speed. Then, a quarter of vehicle model was set up with a control strategy which the wheel bounce speed and the actuator force was taken as feed- back measure. The characteristic simulation of hybrid active suspension shown that the hybrid active suspension performs well, which improved the vehicle tiding comfort and tire road holding, also with little spring distortion.