Interacting with a Simulink Model from a Matlab Script 

In case it is helpful, here are all my Matlab videos in a single playlist ru-vid.com/group/PLxdnSsBqCrrEU0dLSrTcl0-w9cVYKMTaF. You can support this channel via Patreon at www.patreon.com/christopherwlum or by clicking the 'THANKS' button underneath the video. Please let me know what you think in the comments. Thanks for watching!

for those who are using R2021b some tweaks are to be made as described below 11:42 you will see an extra variable (probably named ans) in your workspace once 'sim('PendulumModel.slx')' command is executed. 13:55 Now after that when you create an outport(yout) in simulink and run the code, you wont see any other variable getting added to your workspace. that is because the 'yout' variable will be created under the variable that was previously generated(probably named ans). Due to this you wont get the output you are expecting, to get the appropriate output just change code line, at 15:17 thetasignal = yout.getElement('theta'); to thetasingal = ans.yout.getElement('theta'); also to check the yout variable in command prompt , 14:05 type 'ans.yout'+enter 19:31 to get signal dimensions go to debug ------> information overlays ------->signals------->signal dimensions 23:58 'simX' & 30:38 'logsout' is similar variable to 'yout'. Change the code in similar way.

Your tutorials are long, but the clarity after watching them is amazing. Thank you for putting these efforts for us.

Scripting being the superior interface to GUI-based systems, this is a helpful resource.

Learned Simulink a while ago, glad there's a thorough video to help explain again different features.

I have been searching for this for the last 4hrs. Thanks a lot God

i cant thank you enough. I was stucked at a problem for so long. Your video has helped me solve it.

Thank you. I have nothing else to describe how thankful i am 🥺

This video clears up a lot about interfacing MatLAB and Simulink.

Very helpful video. Gave me a much better understanding of using MATLAB to interact with a Simulink model

AE501: This video had exactly what I needed to output data from Simulink. I also never knew you could run a Simulink model from a Matlab script! Knowing that in undergrad would've have helped a lot. Thanks again for a great Simulink reference.

Many thanks for your work! If I would find this tutorial earlier it would have saved me tons of time spent figuring things out myself. Still, this was extremely helpful, thanks to concise and clear way that you present information. Looking forward to learn more from your excellent tutorials.

AMAZING VIDEO. Everything is so clear, no confusion whatsoever. Thank you so much.

My very basic to complex doubts ...all are sorted thanku for such great video.....

Excellent pedagogy. Thankyou Prof. Lum

Your explanation is so good! Thanks.

Thanks! It's really great to see the depth of Simulink/Matlab package

The most helpful Matlab&Simulink instruction I have even seen. Thanks a lot!

Man, you are Incredible!!!

Thank you for this clear and helpful tutorial

Had a bit of trouble defining a function on Simulink recently. This gives me hope!! Thank you for the great content.

Another great video! Starting to understand the true ability that Simulink has!

A lot of powerful tools/commands! Thank you for the tutorial, Dr. Lum.

Sir,superb description and the way you presented is simply excellent....Expect more from you sir

Very in-depth.

AE 512: good refresher on Simulink!

I was lost until I found you. Thank you very much for the great content.

very good turorial, easy to understand. Thank you!

This is brilliant, thank you very very much.

It's such an amazing job❤ My gratitude and appreciation for you🙏🙏

God bless you again bro!

This is excellent. Well done

Simulink seems to be a super powerful tool!

AE501. Great Video. I had actually never really used Simulink and I was thinking whether this was possible during the last video. I think you did a great job describing how to utilize it. Thanks for the vid!

This video is very helpful.

Great Tutorial Easy to Watch thank you

Very informational, thanks for the tutorial!

So helpful...thank you so much!!

Very interesting and helpful tutorial.

Amazing lecture. Detailed and well put together. Thank you!

Great help Professor!

Very useful information.

Very useful!! Thank you.

AE 501. Great refresher video. I used Simulink a lot in my aero undergrad but I haven't used it quite as much post grad so this was super helpful shaking the rustiness of the bones. I was curious though how you were able to get the labels on the scope plots, I didn't see any options to label the title/give an x or ylabel. You could probably output the data to matlab and then plot from there (spoilers for the next video ha!) but I just wanted to know if the use of scope was limited or not. Thanks again!

Thank you. A great resource.

I like how you can create your own torque function and model it in simulink.

Cleaner method in defining inputs/outputs. Much more comfortable reading data on a matlab script than a Simulink model at the moment.

Thanks for the video! Dealer's choice on how you go about moving information between Simulink and Matlab

Very useful. Thanks!

very helpful thanks

Although at 15:27 he shows you how to extract the time signal from the structure (which is nice to learn how to extract any signal from a structure), every simulation will always give you the time vector for the whole thing in the variable *tout* , which you don't need to define because the model will output it by default for you. That *t* that he defined is already *tout* if you wanted to use it. You can see in the variables section that they will both end having the same dimensions, a vector of 903 elements.

excellent and very informative. please create a video on function-call subsystem & execution order.

AE501: Very thorough tutorial. Provides instruction on multiple different ways to get data from Simulink to Matlab and vis-à-vis. I think I prefer your 45 minute videos to the 70+ minute videos, especially for foreign concepts.

AA 516 : Great video, really helped me to get started on HW 3.

Thank you Chris, it was really a nice video. Very well explained. I would like to know few more things about the interaction between matlab script and Simulink. What I want to do is, I want to execute an optimization code which measures the Simulink output continuously over time and under certain conditions it optimizes the input signal and applies the modified input to the simulink while it is still running. Is it possible to do that? In case it is possible I would like to request you to make a video on this. Thank you.

Great video

Helpful content!

AE501: Great intro to getting matlab to talk to simulink. I was using R2020b and had some trouble getting "yout" to work correctly like your video. Had to go to model settings -> data import/export -> "uncheck" single simulation output and all worked perfectly. I guess mathworks must have modified that between 2016b and now.

You are the best teacher that I have ever found for Control Theory, I wish I knew you when I was taking my control systems course at university and yeah... you just got a new subscriber. ;)

AE501: Very helpful explanation of using MATLAB script with Simulink!

very good explaination i would like to know if it possible to creat a block containing loss formulas of an induction motor to perform a modelisation

Your tutorials are far better than the stuff from Mathworks. Thank your very much!

AA 516: This video made a previously daunting task really easy to understand and follow, I'm excited to learn more about Simulink modeling!

Good video.

AE501- The level of detail and why the methods are done each way is very helpful. Taking the viewer from novice to beginner quickly. More useful tools in the toolbox for Simulink! Thank you Chris!

Sir its just really really helpful...... 🌹🌹🌹

Thank you for the tutorial! Can i extract the data from simulink, for example in this tutorial theta and theta dot, use them as inputs for a matlab script and feed the output back to the simulink model. My question basically is: is it possible to use the "x" state data while its being updated in the array at every time step?

great stuff

can any one please help on this messages No appropriate method, property, or field 'values' for class 'Simulink.SimulationData.Signal'. Error in Matlabscriptwithsimulinkmodel (line 24) theta = thetaSignal.values.Data;

Dear sir , Hello, First of all thank you for your videos I hope you can help me with my issue, i am working with matlab simulink and matlab script and i need to bring some data from work space to simulink model and for the script code i must run the model first because there is signals i need it for the code to work correctly so i need to run the model and simulink in the same time (sorry i know its confusing). My issue is when i use the from workspace block i get the following error Error using FAULTMMC (line 4) Invalid variable specified as workspace input in 'MMCV/From Workspace'. The variable is either a matrix or is a Simulink.SimulationData.Dataset object with an element containing matrix data. The matrix data must be a real, double, have two dimensions, and at least two columns. The first column must contain time values and the remaining columns the data values. Matrix values cannot be Inf or NaN

Do you have video show Matlab/Simulink co-simulation. For example: If the Matlab runs a scenario from 0 to 10 sec at time-step t0. At each t0 Matlab-time-step, Matlab generates data D that needs to be sent in the Simulink model. The Simulink model is also runs from 0 to 10 sec, but 1) it runs at t1 Simulink-time-step, 2) at each t0 time-interval it gets D data from Matlab, 3) it outputs data, called outData (initial outData=0) at each t2 time-interval. So both Matlab code and Simulink model run together to finish from 0 to 10 seconds. In addition, the Simulink model needs to use all the D data from beginning to the latest one in order to run at each t1 Simulink-time-step.

a nice presentation: T_in=t_in.*(t_in=10);

Sir, thank you for the video! How would I input a structure into a simulink model for a matlab function block?

This is so informative, Going from timeseries and a structural timeseries. I am assuming the array mode has same or different extraction rules as well. I have a brushless DC 3 phase model. I have broken it down into components. Trying to get data parameters from a real motor for the mask block. Motor and control board -- Real Hardware -- How do I step this hardware to get a system Identification from this hardware, building a transfer function similar to your DE pend equation by creating and testing Matlab script files and extracting data from the Simulink model and the real hardware model from via stepping and putting a scope on the output of the model possible creating a bode plot. Maybe using a network analyzer to capture magnitude and phase. Signal source in and Capture wave forms out. Motor Drive hardware is controlled via microcontroller. Sending commands sends the motor to position. I am thinking we would bypass the microcontroller and step after the micro giving us the analog real time version of the model. Mto avoid

This video was so helpful I liked *and* commented on it. I don't do that often.

Sir if I want to vary the constant block with multiple value how can I do?

The your value is in 903x1 double instead of 1x1 DataSet May i ask why ?PLs

Thank you!

You really deserve much more likes!!!!!!!

Can you guide to use simulink clock time as input parameter of MATLAB function block ?

Thank you for the detailed video Dr. Lum. I came to realise many new things that MATLAB could do. However, I would like to know that is there any way to run the system with a vector type input.

Great video on showing how to return and use information from a Simulink model

Cool!

This is brilliant, thank you.

Great Video!! Very good explanaitions, very good speed an great examples!!

I noticed in the θ vs time graph, why is θ NOT oscillating around 0?

Why there is no library(blocks) present in simulink library browser ???

AA516 Very helpful for my homework! thank you!

AE501: Very helpful video, I am re-watching it to try and understand the relationship between the out command an the variable yout. After adding the element to Simulink and trying to run in Matlab, I am still getting an error for the variable yout, which was not added to the workspace. Any help would be apprecieated. -Natalia Ermolaeva

Great tutorial. Very helpful. Thanks.

do You have an example of discrete LPV system in simulnik, or can you help me to do itn please?

Good vid

Thank you professor for your help .l am student from ethiopia ,tigray

awesome how much automation can be put into these models, seems like future work can be done very efficiently

why my value for yout isnot 1*1 but is 903*1 size ?

HI, If I have an EOM as 4mu''+15cu'+3ku=12cz' where m=mass, c=damping & k=stiffness, u =response, and z=input displacement if z=Zsin(omg*t), Z=amplitude of input, then how I will give input to simulink?

Thank you for your kind help. It saves more time.

Thanks for the great video. This was very helpful and well laid out!

For some reason the out1 sink didn’t send data to my workspace.

Thanks Sir, greetings from Brazil.