基于PID参数模糊自适应的汽车EPS助力特性研究

在分析电动助力转向（EPS）系统结构及动力学特性基础上,构建了系统动力学模型和仿真模型.根据助力电机目标电流决策设计了助力特性曲线,同时采用自适应模糊PID控制策略对电动机目标电流进行闭环跟踪控制.通过对比仿真结果中目标电流响应速度、跟踪性等转向参数表明：该控制策略能够提高电动转向控制系统响应性、跟踪性能,使得汽车具有更好的转向性和操作稳定性.

Study on Control Performance Based on Fuzzy Self-adaptive PID Controller for Automotive EPS system

In order to improve the vehicles steering performance, the Electrical Power Steering （EPS） System simulation is modeled and simulated through analyzing the structure and dynamics performance of EPS system. The assisting characteristics curve is designed according to the assisting principle. PID-Fuzzy control strategy is adopted for the closed- loop tracking control of objective current in the motor. By comparing the stimulation outputs on steering characteristics such as the response speed of the target current, yaw rate and so on, the simulation result shows that： the designed controller makes the EPS system have a better performance in the trace, it can improve the steering characteristics and stability on vehicle.