基于分层模糊优化的湿式多片离合器起步控制研究

Study of Wet Multi-plate Clutch Starting Control based on Hierarchical Fuzzy Optimization

针对湿式多片离合器的控制原理和起步结合过程,在充分考虑起步冲击度和滑磨功的基础上,分析了起步过程,选取了各起步过程的控制参数。继而提出了离合器起步占空比分层模糊优化控制策略,即首先分析起步意图,其次对占空比进行初始控制,最后对占空比进行优化。在此控制策略的基础上设计了分层模糊优化的控制模型和算法。经过整车仿真,并与其他控制策略对比,结果显示该策略能有效识别驾驶员起步意图,提高湿式离合器的起步平顺性,并能降低冲击度和滑磨功。

According to the control theory of wet multi - plate clutch and starting process, taking full account of starting impact and sliding friction works, the starting process is analyzed and the control parameters of each starting process are selected. And then the hierarchical fuzzy optimization control strategy of clutch engagement occupation - empty ratio is proposed, which means the first analysis of starting intention, followed by initial occupation - empty ra- tio control, and finally to optimize occupation - empty ratio. Based on the control strategy, the control model and algo- rithm of hierarchical fuzzy optimization is designed. After vehicle simulation and compare with other control strategies, the results show that the strategy can effectively identify the driver＇ s starting intention, improve the smoothness of the wet clutch and reduce the starting impact and sliding friction works.