摘要:为实现电动车制动过程中能量的回馈,提高能量使用效率,同时改善制动情况下的ABS防抱死制动系统安全性能,研究了一种基于再生制动调制方式下的防抱死控制系统。制动过程,将模糊PI控制方法应用于单闭环速度调制,实现不同反馈条件下的PI参数自整定;设计模糊控制器实现对半桥与全桥两种PWM调制方式的分配,以达到制动力矩的非恒定控制,实现了有效的防抱死功能。实验结果证明,制动过程中回路能够对蓄电池反充电;制动力矩相对平稳且非恒定,电动车在不同条件路面行驶时,防抱死性能良好。 关键词:电动车;再生制动;防抱死系统;模糊PI控制器;脉宽调制
Abstract: In order to realize the energy feedback in the brake process of electrical vehicles to improve the efficiency of energy use, while the safety performance of the antilocked brake system (ABS) could be ameliorated, a new ABS based on regenerative brake PWM modes was analyzed. In the brake process, selftuning of PI parameters was realized through the application of FuzzyPI control method in the single closedloop speed modulation. To achieve the distribution of halfbridge and fullbridge PWM modes, another Fuzzy controller, which resulted in the non continuous control of braking torque and was implemented to achieve the effective antilocked function, was designed. Experimental results indicated that the antilocked and regenerative brake system , which was available despite of different road surface conditions, could charge the battery in return and brake torque turned out to be noncontinuous and relatively stable. Key words: electric vehicles; regenerative brake; antilocked brake system; FuzzyPI controller; pulse width modulation (PWM)
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