考虑耦合特性的CVT协同控制算法研究  

A Study on CVT Cooperative Control Algorithm with Consideration of Coupling Characteristics

作　　者：郝允志[1] 孙冬野[2] 周黔[1] 林毓培[2] 

机构地区：[1]西南大学,重庆市智能传动与控制工程实验室,重庆400715 [2]重庆大学,机械传动国家重点实验室,重庆400030

出　　处：《汽车工程》2016年第11期1376-1381,共6页Automotive Engineering

基　　金：中央高校基本科研业务费(XDJK2014B046和SWU112005)资助

摘　　要：根据CVT速比控制和夹紧力控制之间的耦合特性,在需要快速调节速比的瞬态工况,通过暂时适当增大夹紧力的方法来提高速比变化率。利用实验获得的稳态速比控制表和速比变化率经验公式,采用开环-闭环复合控制模型设计了速比、速比变化率和夹紧力的协同控制算法。实验结果表明,协同控制算法在保证夹紧力可靠性和各工况速比控制性能一致性的前提下,使速比调节时间缩短20%~40%。According to the coupling characteristics between the speed ratio control and clamping-force control of a continuously variable transmission,the ratio changing rate is raised by temporarily increasing clamping-force under the transient conditions when rapidly adjusting ratio is required. Base on the control table of steady ratio and the empirical formulas of ratio changing rate,a cooperative control algorithm for speed ratio,ratio changing rate and clamping-force is worked out by using an open loop / closed loop compound control model. Experimental results show that with cooperative control algorithm,the ratio adjusting time is shortened by20 % ~ 40 % while ensuring the reliability of clamping force and the consistency of ratio control performance in different working conditions.

关 键 词：无级变速器 速比 夹紧力 耦合特性 协同控制 

分 类 号：U463.2[机械工程—车辆工程]