摘要
针对传统汽车转向系统建模仿真方法精度不高的问题,在深入研究二自由度整车动力学模型和轮胎模型的基础上,设计开发了一套基于双伺服电机加载的电动助力转向器(EPS)硬件在环仿真试验平台.EPS总成输入端可以选择方向盘手动加载或伺服电机自动加载,输出端则根据整车动力学模型和轮胎模型在当前方向盘转角及实车运行参数下的求解结果,由输出端伺服电机动态模拟实际汽车转向阻力矩,并通过检测关键信号指导调试与检验EPS系统性能.实际应用表明,该试验平台实时性、可靠性好,仿真试验精度高,能对EPS关键性能参数进行准确把握,非常适合于EPS系统的研发、测试及性能评价.
A two degrees-of-freedom vehicle dynamic and a tyre model were discussed to overcome the low precision of the traditional vehicle steering system modeling and simulation. Then an electric power steering system（EPS） hardware-in-loop simulation test platform using two servo motors was developed. EPS steering angle can be input by either hand or input servo motor, while the output servo motor can dynamically simulate the real vehicle steering resistance torque according to the solutions of vehicle dynamic and tyre model under current steering angle and realvehicle operating parameters. Thus the EPS can be evaluated and debugged by detecting and checking critical signals. Test results show that the simulation test platform has good real-time and reliable character istic as well as high simulation precision, and can correctly catch the critical EPS performance parameters, so it is very suitable for developing, testing and evaluating EPS.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2009年第10期1931-1934,1944,共5页
Journal of Zhejiang University：Engineering Science
基金
浙江省重大科技攻关资助项目(2004C11025)
关键词
电动助力转向器
硬件在环
伺服电机
electric power steering system （EPS）
hardware in loop
servo motor
