电磁馈能型半主动悬架变压充电控制设计

Control Design of Electromagnetic Semi-Active Suspension Reclaiming Energy Based on Variable Battery Charge Voltage

为解决电磁半主动执行器使用滞环电流控制方法产生的非线性强及控制复杂等缺点,提出一种变压充电控制方法,并设计了电磁馈能型半主动悬架控制系统。首先,基于LQG控制方法设计理想控制力求取控制器。其次,基于变压充电控制方法和变转速/充电电压的永磁同步电机数值仿真获取了不同转速/充电电压对应的馈能阻尼力数据,并通过数值拟合构建了由理想半主动力和悬架相对运动速度求取充电电压的函数关系从而获取馈能半主动执行器的实际控制力。最后,以被动悬架和理想半主动悬架为比较对象,进行电磁馈能型半主动悬架性能对比与分析。结果显示:与被动悬架相比,电磁馈能型半主动悬架与理想半主动悬架的悬架综合性能指标值分别减小27.4%和34.7%,前、后悬架实际控制力相对于理想半主动控制力的相关系数分别为0.9582和0.9664,电磁馈能型半主动悬架的前、后馈能半主动执行器流向蓄电池组的能量占悬架振动能量的86.4%和87.1%。

A control method of variable voltage charge is proposed to remedy strongly non-linear characteristic and control implementationcomplexity raised from hysteresiscurrent control used in electromagnetic semi-active actuator, and a corresponding electromagnetic semi-active suspension reclaiming energy（ESASRE）control system is designed. Firstly, the ideal control forces calculating controller is designed based on LQG control method. Secondly, the function of the charging voltage with the ideal semi-active force and the suspension relative velocity is fitted out to rule the second controller, which is based on the relationship data of the reclaiming energy damping force with the speed and the charging voltage is from simulation results of the permanent magnet synchronous motor under variable work conditions. Finally, performance comparisons and analyses among the passive suspension, the ideal semi-active one, and the ESASREare conducted. Results show that the suspension quadratic performance indexes of the ESASRE and ideal semi-active suspension reduce by 27.4% and 34.7%, respectively, compared with the passive suspension. Correlation coefficient of the front and rear suspensionsreal control force against ideal semi-active force are 0.9582 and 0.9664, respectively. 86.4% and 87.1% of vibration power of the front and rear suspensions are reclaimed to flow to batteries, respectively.