摘要
对电动助力转向控制系统的综合控制策略进行了理论分析,依据控制时机选择控制模式来确定目标转矩,从而实现转向控制.为改善汽车转向轻便性和路感,设计了在无角度传感器的情况下以转向盘转矩为控制目标的电动助力转向系统.在分析电动助力转向系统数学模型的基础上,建立了基于Simulink的电动助力转向系统仿真模型,进行了仿真分析.仿真结果表明:所设计的电动助力转向系统,在改善转向轻便性和路感的同时,控制性能不受系统参数变化的影响,具有稳定的转向盘转矩特性;目标转矩的控制采用PID调节器,应用力矩传感器检测转矩和电机作用转矩来估算转向盘角度,不同的转向盘角度采用不同的助力比,更符合驾驶员的驾驶习惯,使转矩调节更平稳.
To improve the steering easiness and road feel of vehicle, an electric power steering （EPS） system with the steering torque as the control target is developed. A Simulink based simulation model is built for the vehicle EPS system on the basis of the analysis of the mathematical model of the EPS system. The simulation results show that the developed EPS system improves the steering easiness and road feel, at the same time, the control performance of the system does not change with the parameters of the system, in different angle use different assist ratio by torque sensor and motor assist torque calculating steering angle and has stable steering torque characteristic.
出处
《重庆工学院学报（自然科学版）》
2009年第4期15-19,共5页
Journal of Chongqing Institute of Technology
基金
重庆三祥汽车电控系统有限公司研究项目
关键词
电动助力转向
控制策略
转矩直接控制
角度传感器
electric power steering
control strategy
steering wheel torque control
angle sensor
