摘要
介绍了新型机械电子无级变速器(EM-CVT)的结构特点和工作原理,建立了速比、夹紧力和调速电机数学模型,研究了EM-CVT速比控制策略。针对无级变速器常规PID速比控制算法的不足,对其进行了改进,并在Matlab/Simulink环境下建立的EM-CVT速比模型中,对改进PID速比控制算法进行了仿真分析。仿真中,EMCVT的目标速比呈阶跃变化以模拟汽车大速比变化率(大偏差)和零速比变化率(小偏差)等极端情况。结果显示改进PID速比控制算法具有良好的控制性能,实际速比能有效避免振荡、滞后和超调,准确快速地跟随目标速比。
Structural characteristics and working principle of the novel Electro-Mechanical Continuously Variable Transmission （EM-CVT） are introduced. Mathematical models of speed ratio, clamping force and adjustable-speed motor are established and EM-CVT speed ratio control strategy is researched. Aiming at the shortcoming of general PID ratio control algorithm for electro- mechanical continuously variable transmission,the conventional PID speed ratio control algorithm is improved and a novel PID speed ratio control algorithm is simulated and analyzed in EM-CVT computer model which is established in Matlab/Simulink. The target speed ratio of EM-CVT sim- ulate high speed ratio change rate （large deviation） and zero speed ratio change rate （ little devi- ation） by varying step. The results prove that the improved PID speed ratio control algorithm possesses good control performance and the actual ratio avoids shock, hysteresis and overshoot efficiently.
出处
《机床与液压》
北大核心
2013年第24期6-13,共8页
Machine Tool & Hydraulics
基金
Natural Science Foundation Project of China NSFC(51275549)
Scientific and Technological Planning Project of Chongqing CSTC(cstc2012gg-yyjsB60002)
The Key Laboratory of Manufacture and Test Techniques for Automobile Parts(Chongqing University of Technology),Ministry of Education.(2010KLMT01)
关键词
机械电子无级变速器
速比控制
PID
electro-mechanical continuously variable transmission, speed ratio control, PID
