四驱汽车I曲线复合制动力分配策略研究
Research on I-Curve Compound Braking Force Distribution Strategy of Four-Wheel Drive Vehicle
张行 1郝慧荣 1李玉龙 2张慧杰1
作者信息
- 1. 内蒙古工业大学能源与动力工程学院,内蒙古 呼和浩特 010000
- 2. 解放军96901部队,北京 100000
- 折叠
摘要
以四驱汽车的I曲线制动力分配作为研究对象,提出了I曲线复合制动力分配策略,对中低制动强度和高制动强度两种不同的工况分别制定了不同的控制策略.在中低制动强度下利用Simscape对固定比值前后轴制动力分配和基于I曲线的制动力分配的效果进行对比.得出固定比值分配制动力在汽车运动过程中容易发生车轮抱死,不能够充分利用路面附着条件;根据I曲线进行制动力分配时,制动力分配更加合理,制动距离相对固定比值减少18%以上.验证了所提出的复合制动策略的合理性.
Abstract
Taking the I-curve braking force distribution of four-wheel drive vehicle as the research object,the I-curve composite braking force distribution strategy is proposed,and different control strategies are formulated for medium and low braking strength and high braking strength.Simscapewas used to compare the braking force distribution of the front and rear axles with a fixed ratio and the braking force distribution based on I curve under medium and low braking strength.It is concluded that the fixed ratio distribution braking force is prone to wheel locking in the process of vehicle movement,which cannot make full use of the road adhesion conditions.When braking force distribution is carried out according to curve I,the braking force distribution is more reasonable,and the braking distance is reduced by more than 18%relative to the fixed ratio.The rationality of the proposed compound braking strategy is verified.
关键词
制动系统/制动力分配/Simscape仿真/I曲线Key words
Brake System/Braking Force Distribution/Simscape Simulation/I Curve引用本文复制引用
基金项目
内蒙古自然基金项目(2020LH05015)
内蒙古高校科研项目(NJZY20076)
出版年
2024
NETL
NSTL
万方数据