The invention provides an electro-hydraulic composite braking torque compensation method based on fuzzy control, and belongs to the field of new energy vehicle control. The method mainly comprises the steps that firstly, the braking strength and the required total braking torque are solved; solving a required hydraulic braking torque and a required motor regenerative braking torque; calculating a difference value between the required hydraulic braking torque and the actual hydraulic braking torque, and calculating a difference value between the required total braking torque and the actual total braking torque; and a fuzzy control algorithm is adopted to obtain the change relation of the reserved available motor braking torque and the braking strength within a certain range, a dynamic coordination coefficient is adjusted, the motor compensation torque is output, and the final motor braking torque is controlled. According to the method, the braking hysteresis effect of the hydraulic braking system is improved, the stable braking process is achieved, the braking smoothness and safety are improved, meanwhile, braking energy is recycled, and the braking economical efficiency is improved.
本发明提供了一种基于模糊控制的电液复合制动转矩补偿方法,属于新能源车辆控制领域。主要包括:首先求解制动强度和需求总制动力矩;求解需求液压制动力矩和需求电机再生制动力矩;计算需求液压制动力矩和实际液压制动力矩差值,计算需求总制动力矩和实际总制动力矩差值,将其叠加到转矩补偿模块进行“电机制动力可变”的电液制动力矩协调控制:采用模糊控制算法得到预留的可用电机制动力矩与制动强度在一定范围内变化关系,调整动态协调系数,输出的电机补偿转矩,控制最终的电机制动力矩。该方法,改善了液压制动系统的制动迟滞效应,实现平稳的制动过程,提升制动平顺性和安全性的同时,兼顾制动能量的回收,提升了制动经济性。
Electro-hydraulic composite braking torque compensation method based on fuzzy control
一种基于模糊控制的电液复合制动转矩补偿方法
26.07.2024
Patent
Elektronische Ressource
Chinesisch
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