Starting control of wet DCT vehicle considering clutch friction performance attenuation

doi:10.11835/j.issn.1000-582X.2022.118

Home > Archive>Volume 47, Issue 5, 2024 >57-66. DOI:10.11835/j.issn.1000-582X.2022.118

Starting control of wet DCT vehicle considering clutch friction performance attenuation
DOI:
                        10.11835/j.issn.1000-582X.2022.118
                    
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                        RAO KunRAO Kun
State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, P. R. China
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HU MinghuiHU Minghui
State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, P. R. China
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QIN DatongQIN Datong
State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, P. R. China
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Affiliation:State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, P. R. China
Clc Number:U463.212
Fund Project:Supported by National Natural Science Foundation of China (52072053), and Special Fund for Technology Innovation and Application Development of Chongqing Municipality (cstc2019jscx-zdztzxX0047).

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Abstract:

A dynamic model of the starting process for a wet dual clutch transmission (DCT) vehicle, reflecting changes in clutch friction coefficient and the attenuation of clutch performance, is established. Taking minimum jerk intensity, friction work and starting sliding time as optimization objectives, the optimal transmission torque of the clutch during the vehicle starting process is determined by using the linear quadratic regulator (LQR). To address the impact of clutch performance attenuation and the variation of clutch friction coefficient with the sliding velocity on clutch pressure control, a nonlinear robust control strategy for clutch pressure is proposed. This strategy is designed to track the optimal transmission torque obtained by LQR. Results show that the proposed strategy can effectively track the optimal transmission torque even under changes in clutch friction coefficient, with an average tracking error of about 0.02 N·m. In comparison with the PID control strategy, it exhibits a more accurate control effect and greater robustness.

Key words:wet dual clutch transmission;starting;attenuation of friction performance;robust control

Reference

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饶坤,胡明辉,秦大同.考虑离合器摩擦性能衰减的湿式DCT车辆起步控制研究[J].重庆大学学报,2024,47(5):57~66

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Received:February 28,2022
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Online: June 11,2024
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