车辆主动惯容式动力吸振悬架系统研究

为解决作动器惯质对主动悬架性能不利,被动惯容式动力吸振悬架减振频段较窄的问题,提出了车辆主动惯容式动力吸振悬架构型和车身加速度补偿控制策略。通过对系统动态阻抗特性的解析,表明该方法能大幅削减悬架的簧载共振峰。研究了系统参数对平顺性三项指标的影响关系,说明加速度补偿系数应在空间允许情况下择大为宜,其他参数应折衷选取。通过数值仿真,对比了该悬架与理想动力吸振悬架、被动惯容式动力吸振悬架、传统悬架和主动天棚阻尼悬架的效果,结果表明该悬架能有效改善舒适性,克服作动器惯质的不利影响,且车身加速度补偿控制策略的算法简单、计算量较小,有助于降低成本并提高控制的鲁棒性和实时性。

Vehicle active ISD-DVA suspension system

To solve problems that the inertial of an actuator is harmful to active suspension performance and the vibration reduction effect of inerter-spring-damper (ISD) type dynamic vibration absorber (DVA) suspension is limited, a configuration of vehicle suspension with an active ISD type DVA and a control strategy of compensating vehicle body acceleration was put forward. Through the analysis of system dynamic impedance characteristics, the resonance peaks obvious reduction of the suspension system was realized with the proposed methods. The relationships among the system parameters and three indices of automotive ride comfort were studied. Results showed that the acceleration compensation coefficient should be selected as larger as space permits, and other parameters should be selected in an eclectic way. The effects of an active ISD-DVA suspension were compared with those of an ideal DVA suspension, a passive ISD-DVA suspension, a traditional passive suspension and an active skyhook suspension using numerical simulation. The results indicated that the better ride comfort is provided and bad effects of an actuators inertial are overcome with the new type of suspension; the control strategy for vehicle body acceleration compensation has a simpler algorithm and a less cost for calculation, it is helpful to reducing costs and increasing control robustness and real-time performance.