Physics-based dimension reduction strategies for online torque optimization in electrified vehicles

A torque optimization method for an electrified vehicle having an electrified powertrain including three electric motors a, b, and c and an additional torque generating system, the torque optimization system comprising:

• receiving, by a control system and from a set of sensors, a set of operating parameters of the electrified vehicle;
• determining, by the control system, a torque relationship between electric motors b and c;
• solving, by the control system, a three-dimensional (3D) optimization problem for the electrified powertrain, the 3D optimization problem defining torques generatable by one of electric motors b and c, electric motor a, and the additional torque generating system;
• determining, by the control system, torque commands for the three electric motors a, b, and c and the torque generating system based on the solving of the 3D optimization problem, the determined torque relationship, and the set of operating parameters;
• and
• controlling, by the control system, the electrified powertrain based on the determined torque commands.