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International Journal of Automotive Technology > Volume 18(4); 2017 > Article
International Journal of Automotive Technology 2017;18(4): 685-698.
doi: https://doi.org/10.1007/s12239-017-0068-7
TORQUE CONTROL ALLOCATION BASED ON CONSTRAINED OPTIMIZATION WITH REGENERATIVE BRAKING FOR ELECTRIC VEHICLES
Yang Zhao, Weiwen Deng, Jian Wu, Rui He
Jilin University
ABSTRACT
This paper proposes a constrained optimization-based torque control allocation method aimed to improve energy efficiency, and thus, driving range for electric vehicles. In the proposed method, the cost function is defined not only to achieve desired yaw moment for vehicle handling and stability, but also to minimize power losses for energy efficiency. The particular attention is paid to the power losses due to tire slips both longitudinally and laterally. The constraints are also set based on thorough investigation on various causes of power disppation such that the torque is allocated with restraint to use regenerative braking in its maximum capacity. The proposed control allocation method has been tested and verified to be effective on energy efficiency improvement through both simulation and experiment under various driving maneuvers.
Key Words: Electric vehicle, Control allocation, Tire slip power, Optimal regenerative braking
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