Abstract:In design of the new generation continuously variable transmission (CVT), torque transmitted by clutch can’t be directly acquired through sensors.Here, to shorten oil charging process and avoid metal belt damage caused by torque impact during clutch engagement, the model predictive control algorithm for robustness of clutch actuator was proposed.The robust controller for clutch oil charging and friction-sliding stages was constructed based on the robust control Lyapunov function (RCLF).The RCLF prediction model was adopted to replace the traditional proportional control method, and compensate the problem of insufficient oil charging time existing in the traditional control.A CVT start control system was established, and clutch cylinder pressure engagement speed and impact degree were taken as the evaluation indicators to measure the whole vehicle start performance.Finally, the vehicle start performance simulation and actual vehicle tests with different throttle opening levels were completed using traditional and RCLF control methods.Test results showed that compared with the traditional clutch starting control method, the clutch cylinder pressure based on RCLF can complete oil charging process at objective time instant, and the whole vehicle start impact degree is reduced, so the control effect of the proposed RCLF is superior to that of the traditional control.
韩玲 1,刘鸿祥 1,赵聪聪 2,曹越,赵颖慧 3. 基于鲁棒控制Lyapunov函数的CVT离合器起步非线性控制研究[J]. 振动与冲击, 2019, 38(21): 210-215.
HAN Ling 1 LIU Hongxiang 1 ZHAO Congcong 2 CAO Yue1 ZHAO Huiying 3. Nonlinear control of CVT start clutch based on robust control Lyapunov function. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(21): 210-215.
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