A direct multiple shooting method to improve vehicle handling and stability for four hub-wheel-drive electric vehicle during regenerative braking
| Autor: | Ziqi Zhan, Jiawang Yong, Nenglian Feng |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Energy recovery business.product_category Computer science 020209 energy Mechanical Engineering Wheel drive Stability (learning theory) Aerospace Engineering 02 engineering and technology Automotive engineering Direct multiple shooting method 020901 industrial engineering & automation Regenerative brake Automobile handling Electric vehicle 0202 electrical engineering electronic engineering information engineering business |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 234:1047-1056 |
| ISSN: | 2041-2991 0954-4070 |
| DOI: | 10.1177/0954407019867510 |
| Popis: | Regenerative braking is an important technology to improve fuel economy for electric vehicles. Apart from improving energy recovery efficiency and vehicle stability, the arithmetic speed of the algorithm is also essential for an automotive-qualified micro control units. This paper presents a direct multiple shooting method–based algorithm to achieve multiple objectives for four hub-wheel-drive electric vehicle during mild braking situations. Mathematical models of the system are generated for numerical simulations in MATLAB, including a vehicle dynamics model, a modified tire model, a single-point preview driver model, and a regenerative braking motor efficiency map. With the limitation of hard constraint and minimization of adjustment rate in cost function, optimization tends to be accomplished by distribution of braking torque in front and rear wheels. Furthermore, the control strategy has been realized using a direct multiple shooting method to convert the nonlinear optimal control problem to a nonlinear programming problem, which will be settled by adopting a sequential quadratic programming method in each subintervals. The effectiveness and adaptation of the control strategy for four hub-wheel-drive electric vehicle has been evaluated by conducting many simulations during mild braking situations, and the simulation results also demonstrated that the direct multiple shooting–based strategy exhibits a better performance than that of proportional-integral-based or nonlinear model predictive control–based controller. |
| Databáze: | OpenAIRE |
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