CAJ | 학술논문

为了提高电动汽车在复杂路面情况下的加速能力和稳定性，提出了一种基于动态路面最优滑转率估计的驱动防滑控制策略并进行了仿真研究。首先从车辆－地面系统模型入手，分析了路面参数估计的数学原理并给出了单一路面下的最优滑转率判别条件，进而将多种路面交叠的情况下的最优滑转率参数估计问题转化为高、低附着路面相互切换的统一问题进行了深入分析，引入高估门限λmax 与低估门限λmin 设计了最优滑转率的动态估计方法。基于动态路面的参数估计建立了相应的驱动防滑控制策略。仿真结果表明：所提出的参数估计方法和控制策略显著提高了电动汽车的加速能力，且在路面条件突变的情况下也能有效抑制驱动轮的过度滑转，改善了整车的行驶稳定性。
위료제고전동기차재복잡로면정황하적가속능력화은정성，제출료일충기우동태로면최우활전솔고계적구동방활공제책략병진행료방진연구。수선종차량－지면계통모형입수，분석료로면삼수고계적수학원리병급출료단일로면하적최우활전솔판별조건，진이장다충로면교첩적정황하적최우활전솔삼수고계문제전화위고、저부착로면상호절환적통일문제진행료심입분석，인입고고문한λmax 여저고문한λmin 설계료최우활전솔적동태고계방법。기우동태로면적삼수고계건립료상응적구동방활공제책략。방진결과표명：소제출적삼수고계방법화공제책략현저제고료전동기차적가속능력，차재로면조건돌변적정황하야능유효억제구동륜적과도활전，개선료정차적행사은정성。
An acceleration slip regulation strategy based on optimal slip ratio dynamic estimation and its simulation study were presented to improve the accelerating ability and stability for electric vehicles under complicated road conditions. Firstly, the mathematical principle of road parameter estimation was analyzed using the vehicle?road sys?tem model, through which the judgment condition of optimal slip ratio under a single road condition was proposed. Then the estimation problem of optimal slip ratio under complicated road conditions was analyzed by transforming it into a uniform problem of the switch between high and low ground adhesion coefficients. Furthermore, the dynamic estimation method of optimal slip ratio is acquired by introducing overestimated thresholdλmax and underestimated thresholdλmin . Finally, the corresponding acceleration slip regulation strategy is established based on estimating dy?namic road parameters. Simulation results indicate that the proposed estimation method and control strategy can im?prove the accelerating ability of extended range electric vehicles observably and can also prevent the excessive slip of driving wheel effectively and improve vehicle's stability while the road condition changes suddenly.