A commercial vehicle shifting process control method considering load variation interference

Abstract

The present invention is applicable to the technical field of vehicle transmission control, and provides a commercial vehicle shifting process control method considering load change interference. The method regards the change of vehicle dynamics load in the shifting process of the commercial vehicle electric drive system as a disturbance variable, and designs a disturbance observer to observe the disturbance variable; takes the optimal synchronization time in the shifting process as a performance target indicator, and uses the state equation with disturbance observation value as the constraint condition of the optimization problem, thereby reducing the shifting power time and reducing the influence of vehicle load change on the shifting process; solves the constrained finite time domain optimization control problem of the shifting synchronization process based on the Pontryagin minimum principle, obtains the analytical solution of the optimal control law and the optimal number of cycles, reduces the calculation difficulty of the optimization problem, and improves the real-time performance of the online solution.

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