线性随动系统总是认为系统中各环节都工作在线性区域。如何确定这个线性区是本文讨论的主要课题。若能正确选择各环节线性工作区域,既能保证系统动态品质好又能保证各环节结构简单。本文重点讨论了前置放大器的线性区域确定。前置放大器的输入端信号u_ ∑(t)是由控制作用信号、控制作用补偿信号、速度和加速度负反馈信号、扰动力矩误差补偿信号代数和构成的。u_ ∑(t)是确定前置放大器线性区域主要依据。另外,本文还提出了系统中其它各环节线性区大小确定依据。并给出计算实例。 本文可供随动系统线路设计人员及有关专业师生参考。 Linear servo system always believes that all aspects of the system are working in the linear region. How to determine this linear region is the main topic of this article. If we can correctly select the linear work area of ​​each link, we can ensure the dynamic quality of the system is good and the structure of each link is simple. This article focuses on the linearization of preamplifiers. Preamplifier input signal u_ Σ (t) is controlled by the role of the signal, the control of the role of compensation signals, speed and acceleration of the negative feedback signal, disturbance torque error compensation signal algebra and composition. u_ Σ (t) is the main basis for determining the linearity of the preamplifier. In addition, this article also proposed the linearity of other areas in the system to determine the size of the basis. And give the calculation example. This article is available for follow-up system line designer and relevant professional teachers and students reference.