2) Fuzzy Control: Braking force distribution in EVs with regeneration is influenced by many factors, and many parameters are constantly changing, so recycling strategy is difficult
to be expressed. The fuzzy logic control strategy for EV braking force distribution can be easily demonstrated by the influence of different factors. Therefore, the fuzzy control theory is applied to the EV braking force distribution. The fuzzy control strategy of the EV braking force distribution structure is shown in Fig. 8; the three inputs are the EV front-wheel braking force, speed, and battery charge state [state of charge (SOC)] [12]. In the fuzzy control system, the input variables include the front braking force, the SOC, and the EV speed. The output
variable is the ratio which is proportional to the regenerative braking force taking in the front braking force. Front braking force: the driver braking requirements are concerned with the
driving safety. The value of the braking force represents the braking distance and time the driver requires.We prefer the concourse of speed to be low, middle, and high, and the universe
of discourse is [0, 2000]. The membership functions are