本文阐述了偏转线圈随动系统低速抖动产生的基本物理缘由,具体分析了随动系统的各个有关因素,从而认为非线性因素摩擦对低速抖动的形成及影响起着主要的作用。并根据低速抖动产生的基本原理和影响因素探讨了在生产和实践中如何减弱以至基本消除低速抖动现象。同时总结了某雷达产品偏转线圈随动系统中齿轮减速箱生产和装配的一些经验教训。 This paper describes the basic physical causes of low-speed jitter of the yoke system and analyzes the relevant factors of the servo system in detail. Therefore, it is considered that the friction of nonlinear factors plays a major role in the formation and influence of low-speed jitter. According to the basic principles and influencing factors of low-speed jitter, how to reduce and even eliminate low-speed jitter in production and practice is discussed. At the same time, some lessons learned from the production and assembly of the gearbox in a radar product deflection coil servo system are summarized.