电动助力转向系统随动特性仿真

电动助力转向系统（Electric Power Steering，EPS）必须随时根据驾驶员的操作，提供渐进随动的转向助力动作，所以系统必须有很高的跟踪性和很好的稳定性．在对EPS的工作原理和力学模型分析的基础上，建立EPS系统仿真模型，设计出一种模糊自适应PID（Proportion—Integral—Derivative）控制器，有效地改善了传统PID控制器的不足．通过仿真表明，这种模糊自适应PID控制器与传统PID控制器相比，具有更好的跟踪性和稳定性．

Fuzzy adaptive PID control study on servo property for electric-powered steering systems

The electric-powered steering （EPS） system provides progressive servo actions according to driver operations. As such, the system should possess high tracking property and good stability. Based on the EPS working principles and mechanical model analysis, the EPS system simulation model is established. By designing a fuzzy adaptive PID controller, the deficiency of traditional PID controllers is effectively improved. To this end, it is indicated from simulation that, compared with traditional PID controller, the fuzzy adaptive PID controller possesses higher tracking property and stability.