The core of this study is the development of an effective upper level controller based on the optimal control allocation, to which previous studies have not paid adequate attention. The developed control structure is divided into two stages: the upper level control that governs the procedure to determine the most suitable torque trajectories of the clutches and engine, and the lower level control that manages the strategy for each actuator controller to track the given torque trajectories. In this paper, a new approach to the control strategies is implemented through interpreting the DCT powertrain as an over-actuated system that possesses actuator redundancy. DCT powertrains require sophisticated control of two clutch actuators and the engine throttle to achieve good shift performances, i.e. This study develops control strategies for the gear shift of dual-clutch transmissions (DCTs) using optimal control allocation.
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