局部高放系统是用高阶导数组成的反馈回路抑制干扰,非线性及变参数的影响,从而使低阶导数和位置反馈回路的性能得到改进,局部高放回路增益易调高。文中讨论了允许无穷增益的条件,结合机电装置有干摩擦的控制对象讨论了用局部高放系统抑制干摩擦的影响。最小速度限和精度及与增益的关系,文中给出了实际例子。 Local high-end system is the high-order derivative of the feedback loop to suppress the interference, nonlinear and variable parameters, so that low-order derivatives and position feedback loop performance is improved, local high-dropout gain easy to adjust. In this paper, the conditions for allowing infinite gain are discussed. The effect of suppressing local dry friction with a local high-level system is discussed in combination with the controlled object with electromechanical device having dry friction. The minimum speed limit and accuracy and the relationship with the gain, the article gives the actual example.