Stability control for distributed drive electric vehicles based on in wheel motor/hydraulic brake system
                                          WU Ke jia1, WU Yi wan1, LI Fan2, CHEN Zheng qiang1
(1.School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, China; 2.State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China)

Abstract: Aiming at solving the problem of the stability control of distributed electric vehicles under high speed driving conditions, this paper studied the reference model of distributed drive electric vehicle, fuzzy PI control, vehicle dynamics planning, coordinated control strategy of motor/hydraulic system, optimal control distribution method and so on. Moreover, the control strategies of electro hydraulic stability of distributed drive electric vehicles were summarized and a vehicle stability control system based on the cooperative control of hub motor/hydraulic brake system was proposed. In addition, the dynamics model of distributed drive electric vehicle was established using Carsim and the cooperative control strategy of motor/hydraulic was designed by Simulink. And then the sinusoidal stagnation steering test was carried out on the CarSim/Simulink co simulation platform. The results indicate that vehicles without control or only with motor control unable to maintain stability under extreme conditions, while the steering stability of the vehicle can be ensured with the cooperative control of motor/hydraulic brake system.

Key words: stability control; cooperative control; control distribution; hub motor; hydraulic brake system