摘要
基于Simulink建立了用于分析电动助力转向系统特性的非线性汽车动力学模型。针对转向系统转向轻便性、高速行驶稳定性和回正性的多重目标,制订了包括助力、补偿、回正和阻尼的控制策略。根据方向盘检测转矩和转角制定死区控制,并在此基础上制定了综合控制策略。进行了Simulink仿真分析。结果表明,所设计的综合控制策略在满足转向轻便性和路感要求的同时,可以解决低速回正慢、高速回正超调的问题,在防止电机频繁启动的基础上,可以改善汽车高速行驶稳定性。
A non-linear model used for analysis of EPS was established in Simulink. In order to improve the steering efforts, high speed stability and return ability of the steering wheel, the combination control strategies including assistance control strategy, return control strategy, damping control strate- gy and compensation control strategy were built based on dead zone control. The simulation results validate that the combination control strategies could achieve the request of steering efforts and steering feeling, and it also greatly enhances the return ability. Furthermore, the handling and stability were improved at high speeds with the motor not being started frequently.
出处
《重庆理工大学学报（自然科学）》
CAS
2012年第3期1-7,共7页
Journal of Chongqing University of Technology：Natural Science
基金
重庆市自然科学基金重点资助项目(CSTC
2006BA6017)
关键词
汽车
电动助力转向
建模
控制策略
vehicle
electric power steering
modeling
control strategy
