USING LINEAR ANALYSIS IN MATLAB FOR MEP 1422/1522 (MATLAB V7, R14) Dr. Nik Rumzi Nik Idris Dept. of Energy Conversion Fakulti Kejuruteraan Elektrik Universiti Teknologi Malaysia

Say, we need to obtain Bode plot of this TF: Which can be constructed using SIMULINK blocks: Fakulti Kejuruteraan Elektrik

We can to put dummy blocks so that we can define the input-output points Fakulti Kejuruteraan Elektrik

Right click the input point and select Linearization Points  Input Point Fakulti Kejuruteraan Elektrik

Right click the output point and select Linearization Points  Output Point Fakulti Kejuruteraan Elektrik

Start the Linear Analysis: Tools  Control Design  Linear Analysis Fakulti Kejuruteraan Elektrik

Start the Linear Analysis: Tools  Control Design  Linear Analysis Fakulti Kejuruteraan Elektrik

Select the Bode response plot and Linearize Model Fakulti Kejuruteraan Elektrik

Select the Bode response plot and Linearize Model Fakulti Kejuruteraan Elektrik

Try to place input point at several different input points. For each points, obtain the Bode plot Fakulti Kejuruteraan Elektrik

The Bode plots of the 3 different input points: Fakulti Kejuruteraan Elektrik

Open-loop and close-loop plots Crossover frequency approximates close–loop bandwidth Fakulti Kejuruteraan Elektrik

Contain a zero and a pole at origin DC gain can be adjusted independently from location of zero Transfer function PI controller Fakulti Kejuruteraan Elektrik

PI controller Fakulti Kejuruteraan Elektrik