Model-based predictive regulation of an electric machine of a motor vehicle drive train

摘要

The invention concerns a processor unit (3) for model-based predictive regulation of an electric machine (8) of a drive train (7) of a motor vehicle (1),where the processor unit (3) is designed to perform an MPC algorithm (13) for model-based predictive control of an electric machine (8) of a drive train (7) of a motor vehicle (1). The MPC algorithm (13) contains a longitudinal dynamic model (14) of the drive train (7) and a cost function to be minimized (15). The cost function (15) contains as the first term an electrical energy weighted with a first weighting factor and predetermined according to the longitudinal dynamic model (14),which is supplied within a prediction horizon by a battery (9) of the drive train (7) to drive the electric machine (8). The cost function (15) shall include, as a second term, a driving time weighted by a second weighting factor and predetermined according to the longitudinal dynamic model (14), which the vehicle (1) needs in order to return the entire path predetermined within the prediction horizon. The processor unit (3) is designed to determine an input size for the electric machine (8) by running the MPC algorithm (13) depending on the first term and depending on the second term,so that the cost function is minimized.