Model Predictive Control in Simulink with Arduino TCLab

[oussamasadki]

Thanks, this was very informative, i am really into learning control theory, i have already worked on a project about MPC applied to a boost converter in MATLAB and I compared it with PID. I hoped to face the problem of duty cycle (control signal) that exceeds the logical limits {0, 1} but it hasn't happened so that to apply the constraint MPC.
I started to dive more into the predictive control specifically DMC but find it rather a bit tough to understand the complex mathematical modeling and algorithms.
Please what would you advise me to do, continue learning MPC first then move to other approaches of predictive control ..?.
Thanks.

[pnachtwey]

You mention minimizing the error but you don't mention why MPC is different from normal closed loop control.
The big difference is that MPC has no controller gains. There is no need for Ki, Kp, Kd etc. The control output is found by minimizing error between the model and the plant between the estimated response using the model and the desired response or set point..
Where does the model come from?
How long should be the time horizon? This is not covered but it is very important.
What happens if your plant has a dead time? The time horizon must be extended beyond the dead time but how far?

[CamiloGonzalez-dbfp]

Dear John : I recently purchased the arduino TCLab with a Arduino Leonardo model from AMAZON (I'm from Chile south-america), all the archives from the pid files works fine, but the MPC files, specifically from the first order folder doesnt run the simulation, it appears the following simulation errors: For Windows:
Open device manager, select "Ports (COM & LPT)"
Look for COM port of Arduino such as COM4
For MacOS:
Open terminal and type: ls /dev/*.
Search for /dev/tty.usbmodem* or /dev/tty.usbserial*. The port number is *.
For Linux
Open terminal and type: ls /dev/tty*
Search for /dev/ttyUSB* or /dev/ttyACM*. The port number is *.
Pacer: Average idle real time per major time step = 0.243975 sec
An error occurred while running the simulation and the simulation was terminated
Caused by:
Error due to multiple causes.
The first input argument of the "mpc" command must be an LTI object or a structure of models and offsets.
Error evaluating MATLAB function in MATLAB Function'


sometimes in the Matlab command windows appears:
Specify port (e.g. COM4 for Windows or /dev/ttyUSB0 for Linux):


I don't know how to solved and I have the most recent MATLAB version (2019b), please help me it means a lot to me .

[sowibrahima]

Nice video sir. is that possible with 2 parameters (temperature and humidity) at the same time. thank you