Hi ahmed,
To obtain a transfer function from a Simulink model, follow these summarized steps:
- Design your system in Simulink accurately using the appropriate blocks.
- Linearize your system using MATLAB functions such as linearize('YourSimulinkModel') to get a linear model approximation.
- Convert the linear model to a transfer function using MATLAB's tf function, like [num,den] = tfdata(sys,'v'), where sys is your linearized system.
- Create a script to plot the root locus for various parameters using the obtained transfer function coefficients (num and den) with commands like sys_tf = tf(num,den); rlocus(sys_tf).
Hope this helps.
