离合器滑摩PID控制器设计与参数优化

Design of Clutch-Slip Controller Using PID and Parameters Optimization

为改善液力式自动变速器换档过程中新档离合器接合过程中的滑动摩擦过程,提高换档过程的平顺性与快速性,本文针对换档惯性向新档离合器的滑摩过程对换档品质的影响,采用工程上普遍使用的PID控制器,通过选取能够反映良好换档品质的离合器转速差参考轨迹,对新档离合器的啮合速度进行跟踪控制。采用多领域仿真软件AMESim搭建了整车动力学模型,进而利用随机算法对PID控制器参数范围进行整定,并选取满足性能指标的一组参数进行仿真验证,离线仿真结果表明,基于PID的离合器滑摩控制器能够较好地实现对期望离合器转速差曲线的跟踪,较好地适应外界工况的变化,并保证良好的换档品质。最后对控制器进行了快速原型仿真实验,进一步验证了控制器的有效性及实时性。

To improve the shift slip process of an automatic transmission to get a smooth and swift shift.In this paper,considering the influence of clutch-slip process on AT shift quality,a PID controller is designed to make the clutch speed track a trajectory.The trajectory is predesigned and represents shifting performance requirements.The parameters of the controller are selected from the good set computed by random algorithm based on performance requirements.Finally,the effectiveness of the PID controller is tested on the power train simulation model designed on AMESim and simulation results show a good shift quality.Furthermore the real time reliability is validated based on RCP experiment.