Citation

Peng J, He H, Liu W, Guo H. ScientificWorldJournal 2015; 2015: 584075.

Affiliation

School of Mechanical and Automotive Engineering, Liaocheng University, Liaocheng Shandong 252000, China.

Copyright

(Copyright © 2015, ScientificWorld, Ltd.)

DOI

10.1155/2015/584075

PMID

26236772

PMCID

PMC4506827

Abstract

This paper provides a hierarchical control strategy for cooperative braking system of an electric vehicle with separated driven axles. Two layers are defined: the top layer is used to optimize the braking stability based on two sliding mode control strategies, namely, the interaxle control mode and signal-axle control strategies; the interaxle control strategy generates the ideal braking force distribution in general braking condition, and the single-axle control strategy can ensure braking safety in emergency braking condition; the bottom layer is used to maximize the regenerative braking energy recovery efficiency with a reallocated braking torque strategy; the reallocated braking torque strategy can recovery braking energy as much as possible in the premise of meeting battery charging power. The simulation results show that the proposed hierarchical control strategy is reasonable and can adapt to different typical road surfaces and load cases; the vehicle braking stability and safety can be guaranteed; furthermore, the regenerative braking energy recovery efficiency can be improved.

Language: en