A Python Module for System Dynamics and Controls
Here is a module I am working to make it easier for my students to use Python in my "System Dynamics" and "Feedback Control" courses:windows .exe
source .tar.gz
If you do not have authority to install one of the above files, you can place this file in your current working directory or any directory in your PYTHONPATH:
controls.py
Examples for ME 356 System Dynamics
python_examples_10_19_09.zipAn Introduction to Python for Control, System Dynamics, and Mechatronics
Bode Plot Generation
python_lowpass_demoThis is a basic demo of how to generate a Bode plot from a transfer function, using a lowpass RC filter as an example.
Step Response and Swept Sine Response of a First Order System
Systems Intro V2Introduction to step responses and system identification.
Fourier Analysis
Basic Fourier analysis example:
fourier_example
A Fourier homework assignment:
fourier_hw_example
fourier_hw1.txt (data file 1)
fourier_hw2.txt (data file 2)
Example of how to read data from text files:
data_read_example.py
Determine expressions for y(t) based on taking the FFT of the data. Data is tab delimited in 2 columns - t and y(t). Verify your expression for y(t) by plotting your expression over top of the data from the file.
Be sure to clearly label your plots and submit your code.
System Modeling/Identification Homework
System 1 - step responseSystem 2 - step response
System 1 - swept sine response
System 2 - swept sine response
Plot the step responses and swept sine responses vs. time from the data files. Find the transfer function for each system by taking the fft of the sweptsine data (generate Bode plots). Taking the step response and Bode plot together for each system, estimate the parameters for each system (come up with a transfer function model with known coefficients).
Verify your transfer functions by overlaying Bode plots from your model and the data.