利用遗传算法识别汽车轮胎魔术公式参数

摘要

汽车轮胎动力学模型的准确度对汽车运动仿真的精度影响很大.汽车轮胎魔术公式是一种精度较高的轮胎模型. 利用遗传算法的非线性优化特点,对汽车轮胎纯滑移魔术公式参数进行识别,并讨论算法参数对参数识别的影响.识别结果,纵向力和侧向力的相对残差在5%左右,回正力矩的相对残差在10%左右.%The accuracy of vehicle tire dynamic model has great effect on precision of vehicle motion simulation. The Magic Formula of vehicle tire is a high-accuracy tire model. The authors make use of the feature of the nonlinear op-timization of the genetic algorithm, identify the pure slip parameters of the Magic Formula for vehicle tires, and dis-cuss the effect of genetic algorithm parameters on the accuracy of the parameter identification. The identification re-sults are that the relative errors of the longitudinal force and lateral force are about 5%, and the relative error of aligning moment is about 10%.