摘要
为了提高双离合自动变速器(DCT)在各种干扰条件下对期望液压的跟踪精度,提出了一种基于状态观测器的滑模鲁棒控制方法。首先将DCT的工作过程分为空程和滑磨两个阶段进行分析,并分别建立数学模型,然后通过设计自适应律估计出DCT不确定性,并设计了状态观测器来估计DCT活塞位移,最后提出空程和滑磨阶段的滑模鲁棒控制律,实现对DCT液压的精确控制。实验结果表明:设计的方法较模糊PID控制具有更优的性能,液压最大跟踪误差仅为10kPa,同时设计的自适应律能够快速和准确地估计出不确定性,最大估计误差仅为1kPa/s,设计的状态观测器也能够准确估计出活塞位移,最大估计误差仅为0.3×10^(-3)m,大幅提高了DCT液压的控制精度。
To improve the tracking accuracy of dual clutch automatic transmission(DCT)to the desired hydraulic pressure under various interference conditions,a sliding mode robust control method based on state observer is proposed.Firstly,the working process of DCT is divided into two stages,the air travel stage and the sliding wear stage,and the mathematical models are established respectively.Then,the uncertainty of DCT is estimated by designing an adaptive law,and the piston displacement of DCT is estimated by designing a state observer.Finally,the sliding mode robust control law in the air travel stage and the sliding wear stage is proposed to realize the accurate control of DCT hydraulic pressure.The test results show that the designed method has better performance than fuzzy PID control,and the maximum tracking error of hydraulic system is only 10kPa.Meanwhile,the designed adaptive law can estimate the uncertainty quickly and accurately,the maximum estimation error is only 1kPa/s,the designed state observer can also estimate the piston displacement accurately,and the maximum estimation error is only 0.3×10^(-3)m,which greatly improves the control precision of DCT hydraulic system.
作者
楚雪平
王晓玲
CHU Xue-ping;WANG Xiao-ling(School of Intelligent Manufacturing,He’nan Polytechnic College,He’nan Zhengzhou 450046,China;Department of Library,He’nan University of Science and Technology,He’nan Luoyang 471023,China)
出处
《机械设计与制造》
北大核心
2023年第12期19-23,29,共6页
Machinery Design & Manufacture
基金
河南省科技公关项目(202102210114)。
关键词
DCT液压控制
离合器接合
不确定性
抗干扰
自适应律
状态观测器
DCT Hydraulic Pressure Control
Clutch Engagement
Uncertainty
Anti-Interference
Adaptive Law
State Observer
