首先对非线性PID方法的基础元件——跟踪微分器进行了改进，以提高其性能。
Tracking differentiator as an elementary unit for nonlinear PID technology is improved so that it can yield better differential signal.
自抗绕控制器由三部分组成：跟踪微分器、扩张状态观测器和非线性状态误差反馈控制律。
The auto-disturbance rejection controller is composed of three parts: tracking-differentiator, extended state observer and nonlinear state error feedback control law.
文章基于非线性跟踪微分器、非线性度变换以及PID校正的思想，构造了一种新的非线性PID控制结构。
This paper proposes a new nonlinear PID model of valve controller based on nonlinear tracking-differentiator, nonlinear norm and PID adjustor.
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