Application of MATLAB in frequency characteristics Bode diagram

Frequency domain analysis in classical control theory is widely applied in automatic control system analysis.Bode diagram is an important component in the frequency domain analysis.The closed-loop system's frequency domain index is calculated based on Bode graph.Therefore,the closed-loop stability,rapidity and accuracy can be analyzed.However,there are some drawbacks using traditional hand drawing on Bode graph,i.e.,time consuming and inaccuracy.MATLAB software has a powerful computing capability and graphical function,which can fast and accurately draw a frequency characteristic curve.A case study demonstrates the drawing of the system's Bode diagram using MATLAB.It provides a great convenience for control system design and analysis.