Nyquist criterion is the most important stability criterion in the classical control theory,but it is not suitable for the same order closed-loop system.At the same time,because the basic link style is incomplete,the meaning of the open-loop transfer function is easy to be misinterpreted and inconvenient to use,the beginners have difficulty in learning and understanding the automatic control principle.Some concepts and expressions of frequency domain method were sorted out,and the basic links and control systems were completely classified.The concept of loop transfer function was proposed to solve the problems of easy misunderstanding and inconvenient use of the meaning of open loop transfer function.The micro inertia link intervention method was introduced to solve the problem of stability judgment for the same order closed-loop system.The loop transfer function,micro inertia link intervention method,substitution of giant inertia link and micro damping oscillation link greatly simplifies the analysis of system characteristics,thereby improving the frequency domain analysis method and its knowledge system.
关键词
基本环节/环路传递函数/微惯性环节/巨惯性环节/微阻尼振荡环节
Key words
basic links/loop transfer function/micro inertial link/giant inertia link/micro damping oscillation link
维普
万方数据