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《Journal of Mechanical Transmission》 2012-05
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Research on the Speed Ratio Control for the EM-CVT based on the Improved PID Algorithm

Jiang Qiang1,2 Liu Hongyi1 Yang Xinhua2 Cheng Yue2(1 School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110004,China)(2 Chongqing Automobile Institute,Chongqing University of Technology,Chongqing 400054,China)  
Electromechanical control CVT(EM-CVT) is a new type of continuously variable transmission(CVT),and its speed ratio follow error quality is an important parameter validated the performance of vehicle.In order to study the dynamical matching technology between EM-CVT and engine under the running state of vehicle,the special character of two working models is obtained by engine experiment,according to the mechanism of the EM-CVT,the relation between vehicle speed and speed ratio is theoretically analyzed.Based on the basic theory of PID control,the improved PID control algorithm is proposed for the speed ratio control of the EM-CVT,and experimental verification is made.The experimental results show that there is a significant effect on the system with this algorithm.
【Fund】: 国家中小企业创新基金(09C26222113202);; 汽车零部件制造及检测技术教育部重点实验室开放基金项目(2010KLMT01)
【CateGory Index】: U463.212
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