摘要
将电动助力转向系统模型、轮胎模型以及非线性整车模型联系起来,建立完整的汽车转向动力学模型。针对EPS转向、回正、阻尼三种不同的工况,采用自适应模糊PID和PID控制算法对EPS分别进行了助力、回正、阻尼控制。仿真结果表明:所设计的助力特性比较好的解决了转向轻便性和路感的矛盾,回正控制改善了车辆低速时的回正性,抑制了车辆高速时的回正超调现象,阻尼控制能够有效的抑制路面的高频干扰,提高了汽车高速直线行驶的稳定性。
EPS and tire model,nonelinear vehicle are connected to the establishment of a complete model for steering property. For different conditions on EPS turn, aligning and damping, Power, aligning and damping control are carried out on EPS with self-adapt fuzzy PID and PID. Simulation results show that the contradiction of steering easiness and road feel is solved by the power control; the wheel returnability at low speed is improved by aligning control, with the aligning overshoot at high speed restrained ; the influence of high frequency road disturbance is attenuated by damping control,with the stability of the vehicle at high speed driving in straight line improved.
出处
《世界科技研究与发展》
CSCD
2011年第5期753-756,752,共5页
World Sci-Tech R&D
基金
重庆市科技攻关目(2009AB66021)资助项目
关键词
EPS
仿真
稳定性
回正性
EPS
simulation
stability
returnability
