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Wet dual clutch launching adaptive control considering service time
Ke Ma,Dongye Sun,Guanlong Sun,Dongyang Wang 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.6
In this study, an adaptive control strategy named, “front-end optimization + back-end compensation,” is proposed to address the wet dual-clutch transmission start-up problem, while considering the effect of service time on the degradation of friction characteristics. First, the effect of service time on friction characteristics is investigated experimentally. Subsequently, the friction coefficient is estimated using a dual extended Kalman filter, and the optimal motion and control trajectory for the launching process are obtained using the pseudospectral method. Finally, a back-end compensator is designed. The effectiveness of the strategy is verified using the MATLAB/Simulink platform and a vehicle test. The results show that compared with the minimum principle method, the pseudo-spectral method shows less jerk and friction loss with a comparable launching time. The control law is adjusted based on the estimated friction coefficient, which ensures a good start-up. Moreover, the back-end compensator can track the reference trajectory well with parameter perturbation.