一种基于制动强度的制动力分配策略研究

一种基于制动强度的制动力分配策略被提出,该策略可以使混合动力汽车在制动的过程中既能保证制动的稳定性又能最大限度的回收能量。首先在汽车制动动力学和相关法规的基础上,保证汽车稳定的前提下,确定了前、后轴制动力的分配区域。其次,在考虑电机特性等多种约束条件下,根据制动强度确定出最佳的制动力分配曲线,以使能量回收的效率最高。最后,将所提出的算法运用在MATLAB的电动汽车仿真软件中,在四种典型城市公路循环工况下进行了仿真,并且将实验结果与电动汽车仿真软件中原有的算法进行了比较,结果显示,该控制策略在保证汽车制动稳定的前提下,能够使汽车在制动过程中回收更多的能量。

A braking force distribution strategy based on braking strength

In this paper, a braking force distribution strategy based on braking strength is proposed, which could improve the braking stability and at the same time maximize the energy recovery as well. Firstly, to determine the distribution area of the front and rear axle braking forces. we analyse the vehicle braking dynamics model and the relevant laws and regulations under the premise of ensuring the stability of the vehicle, Secondly, the optimal braking force distribution curve is determined base on the braking strength according to the characteristics of the motor and other constraints, which makes the energy recovery efficiency. Finally, the proposed algorithm is applied to the MATLAB"s electric vehicle simulation software, and the simulation is carried out under the four typical urban road cycle conditions, And the experimental results are compared with the original algorithm which is in the electric vehicle simulation software, The results show that the control strategy proposed in this paper can make the automobile recycle more energy in the braking process under the premise of ensuring the vehicle braking stability.