基于自抗扰控制的电子节气门位置伺服系统

Electronic Throttle Position Servo System Based on Auto Disturbance Rejection Control

针对汽车电子节气门系统存在的时变及非线性问题,建立系统非线性模型,以系统的非线性及不确定性作为综合扰动,提出一种基于自抗扰控制器的节气门开度控制策略。通过扩张状态观测器观测系统综合扰动并进行补偿,将非线性不确定系统转化为积分串联型线性系统;通过非线性状态误差反馈控制率获取控制量,对节气门进行控制。仿真试验结果显示,基于自抗扰控制的节气门开度具有响应速度快、控制精度高、鲁棒性强等优点。

Aiming at the time-varying and nonlinear problems of automotive electronic throttle system,a nonlinear model of the system is established,and the throttle valve position control strategy based on auto disturbance rejection controller is proposed.The extended state observer is used to observe and compensate the integrated disturbance of the system,and the nonlinear uncertainty system is transformed into an integral series linear system.The control amount is obtained by the nonlinear state error feedback control rate to control the throttle valve.According to the simulation experimental results,the throttle valve position degree based on active disturbance rejection control has the advantages of fast response speed,high control accuracy and strong robustness.