Title: Dual-clutch coordinating hill-start control strategy based on pseudospectral method

Authors: Kegang Zhao; Haolong Zhong; Yanwei Liu; Jie Ye; Maoyu Mai

Addresses: National Local Engineering Laboratory of Automobile Parts Technology, South China University of Technology, Guangzhou, 510000, China ' National Local Engineering Laboratory of Automobile Parts Technology, South China University of Technology, Guangzhou, 510000, China ' School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, 510000, China ' School of Mechatronic Engineering and Automation, Foshan University, Foshan, Guangdong Province, 528000, China ' National Local Engineering Laboratory of Automobile Parts Technology, South China University of Technology, Guangzhou, 510000, China

Abstract: An optimal framework for dual-clutch coordinating starting is presented to balance the friction work of two clutches. Based on the dual-clutch coordinating starting dynamics model, optimal equation is formulated in which the weighting of the friction work, square of the jerk, and square of the control variables are considered as the optimisation objectives, and the engine torque and clutch-torque change rate are considered as the control variables. The Legendre pseudospectral method is suitable to be used to solve complex nonlinear problems and it is adopted for transforming the optimal control problem into a nonlinear programming problem, and the sequential quadratic programming method is employed for solving the integral term constraint problem with a state variable. Using a dual-clutch transmission car as prototype, optimal trajectories for starting in different working conditions are obtained. Experiments performed on a dual-clutch coordinating starting bench test verify the effectiveness of proposed optimal control strategy.

Keywords: vehicle engineering; dual-clutch transmission; coordinating hill-start; pseudo-spectral method; optimisation strategy.

DOI: 10.1504/IJVP.2022.125941

International Journal of Vehicle Performance, 2022 Vol.8 No.4, pp.351 - 370

Received: 02 Mar 2021
Accepted: 09 May 2021
Published online: 04 Oct 2022 *

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