REFERENCE CLUTCH TORQUE TRAJECTORY GENERATION FOR CONTROL OF A DUAL-CLUTCH TRANSMISSION USING CONTROL ALLOCATION

Abstract

Clutch-to-clutch shift control should be carried out carefully in order to ensure a fast and comfortable gearshift. To achieve the high control performance, various studies have been conducted on torque-based control of DCTs. However, research on how to determine desired torque trajectories for control is still absent even though many papers dealt with feedback control of two clutches for a DCT to generate proper clutch torques. In this paper, a novel method for generating reference clutch torque trajectory for control of DCTs using optimization-based control allocation is proposed. Actually, the suggested method plays a role as the upper-level controller to determine desired torque trajectory of each clutch in the whole DCT control while the lower-level controller performs torque tracking control considering the dynamics of clutch actuators. The effectiveness of the method is verified through various simulations based on the proven dry DCT model.