自适应与迭代学习复合控制的电液位置系统的研究

Composite Adaptive and Iterative Learning Control of Electro-hydraulic Position System

电液伺服系统具有高阶性、非线性、时变性的特点,而且运行过程中还将受到温度变化等因素的干扰,所以常规的PID控制方法难以取得令人满意的效果。为了使电液伺服系统拥有较好的控制效果,提出一种将自适应与迭代学习控制相结合的控制策略,应用于电液伺服系统的位置控制中。应用位置作为反馈,采用开闭环PI的控制策略,以及自校正的控制原理设计控制器,最后运用MATLAB来对其进行仿真。仿真结果表明,该控制策略能够提高系统的控制精度,提升系统的响应速度,提高其收敛与鲁棒性能。

Characteristics of the electro-hydraulic servo system has high order,nonlinear,time-varying,and operation process will be affected by temperature changes and other factors.So the conventional PID control method is difficult to obtain satisfac-tory effect.In order to make the electro hydraulic servo system has good control effect,this paper proposes an adaptive control strategy combined with iterative learning control,position control for electro-hydraulic servo system.Application of position as feedback,the control strategy of open closed loop PI,and self correcting control principle to design the controller,finally using MATLAB to the simulation.