Abstract
An optimal control concept is proposed regarding gear shift operations of automatic transmission systems being part of a complete power train. The optimization is carried through by a dynamic programming approach with a performance measure including passenger comfort and control expenditure. The gear synchronization appears as a constraint at the end of the process. A control law is derived analytically by minimizing the performance measure over each process stage. Simulation results show a significant improvement in terms of gear shift comfort for different driving load cases. Furthermore the shift time and the frictional losses in the shift elements can be reduced by applying the proposed control.
