多组离合器参与的换挡过程混合建模与仿真.pdfVIP

农业机械学报 2007 年 3 月 第 38 卷第 3 期 多组离合器参与的换挡过程混合建模与仿真普 张迎军周志立张明柱 E摘要】 在分析多组离合器参与的自动变速器换挡过程特点的基础上，指出该换挡过程是由连续系统与离散 系统组成的混合系统，进而提出基于键合图理论的连续系统和基于有限状态机的离散系统的换挡过程混合建模方 法。在 Matlab/Simulink 和 Matlab/Stateflow 平台上建立了包含多种状态的东方红 1302R 型橡胶履带拖拉机液压 机械无级变速器的换挡过程仿真模型，仿真结果表明该建模方法能很好地模拟自动变速器换挡过程中离合器的动 态行为，并通过仿真分析了其对换挡品质的影响。 关键词:自动变速器换挡混合建模仿真键合固有限状态机 中图分类号: S219. 032. 1 文献标识码:A Hybrid Modeling and Simulation of Shifting Process Involving Multi-group Clutches 1 Z Zhang Yingjun Zhou Zhi1F Zhang Mingzhu (1. Wuhan University 0/ Technology 2. Henan University 0/ Science and Technology) Abstract The characteristics of automatic transmission shifting process invo1ving multi-group clutches were studied and it was pointed out that the shifting process was a hybrid system including a continuous system and a discrete system. A hybrid modeling method , based on the continuous system under bond graph theory and the discrete system under finite state machine (FSM) , was deve1oped. A mode1 for shifting process of hydro-mechanica1 transmission (HMT) equipped in the Dongfanghong 1302R rubber craw1er tractor was established based on the p1atforms of Matlab/Simu1ink and Mat1ab/Stateflow. The simu1ation results showed that this hybrid system was rather effective for simu1ating a dynamic behavior of clutches in shifting process and its influence on the shift quality was ana1yzed through simu1ation , which served as an effective too1 for the design of clutch contro1 strategy in the shifting process. Key words Automatic transm