摘要
针对装配有湿式双离合器自动变速器车辆的换档问题,制定了分阶段换档策略,建立了换档动力学模型,结合换档品质评价指标,选定冲击度和滑摩功作为二次型性能指标函数,利用最优控制理论,得到换档过程中各个阶段的离合器压力最优控制轨迹,实现了换档过程中离合器压力的最优控制,并进行了实车换档试验,以验证换档最优控制的有效性。试验结果表明,换档过程中,滑摩功和冲击度得到了合理有效的平衡,换档最优控制能够满足汽车换档过程的平顺性和快捷性要求,使车辆具有良好的换档品质。
In order to improve the gearshift quality of vehicles equipped with wet dual-clutch automatic transmission,the gearshift strategy for different stages of gearshift process was proposed and a dynamic model of gearshift process was established.Optimal control trajectory of clutch pressure at every gearshift stage was obtained by optimal control algorithm in which longitudinal jerk and friction work were chosen to form quadratic performance index function,and the optimal control of clutch pressure in the gearshift process was realized by using optimal control trajectories.In order to verify the validity of optimal gearshift control,real vehicle gearshift tests were conducted,which showed that jerk and friction work could be well equilibrated,and the optimal gearshift control could meet the requirements of ride and rapidness in the gearshift process.This study can provide an effective gearshift control strategy for wet dual-clutch automatic transmission.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2011年第6期152-156,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
"863"国家高技术研究发展计划项目(2006AA110109)
关键词
离合器
变速器
最优化
换档控制
离合器压力控制
clutches
transmission
optimization
gearshift control
clutch pressure control
