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Need help with simulink

Asked by Eric Diaz on 9 Mar 2014
Latest activity Answered by Travis Adkins on 5 Dec 2017
I am completely new to simulink and don't know where to start. I would like to create an object with certain intrinsic properties (proton density, T1 and T2 relaxation times, location within a magnetic field). This object would be susceptible to excitation with RF pulses that can resonate with the object's intrinsic frequencies. After excitation the object would release electromagnetic signals over time that are detected as voltages by a receiver/receivers.
Where do I start?
I can't figure this thing out for the life of me...

  1 Comment

Eric Diaz on 10 Mar 2014
I'm not sure that this will ever get answered, but if someone with experience in simulink wants to help on a project, I can help direct what needs to get put into the simulation, as well as equations etc.
This is a personal project, not for any assignment, just fyi.
Once the project is finished, I foresee it being a contribution to the Matlab community and world.

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2 Answers

Azzi Abdelmalek
Answer by Azzi Abdelmalek
on 9 Mar 2014

What you need is to find the mathematical model representing your system. After you can simulate your model with Simulink


Eric Diaz on 11 Mar 2014
Haha...that's easy to say for someone who has been using it before. For someone who has never used it, it is very foreign. I'm sure that the learning curve is very steep, meaning easy to learn in a short time but difficult to get started. If I could have a basic setup for an object, located in 3D space, with ability to change intrinsic properties of that object. I would also need basic ability to excite and magnetize the object through main magnetic field and radiofrequency pulses. The behavior of the object would be governed by the Bloch-Torrey equations ( or
Ideally, at the end, the simulation setup would look similar to this setup ...
Azzi Abdelmalek
on 11 Mar 2014
If you have never used Simulink before, then learn how to use it, begin with simple models. After you will have an idea how to use Simulink with your project. There are many getting started video in youtube. You can also read the Matlab documentation. Your question is not precise, then you can't get a precise answer. you didn't provide the mathematical model of your system, which has nothing to do with simulink. Once we have your mathematical model, we can speak about Simulink.
Eric Diaz on 11 Mar 2014
I'm not sure what you mean that I didn't provide the mathematical model of my system. As I mentioned before, the behavior is described by the Bloch equations. How is that not providing a mathematical model?

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Answer by Travis Adkins on 5 Dec 2017

I need help with this problem for my matlab, i have no idea how to do it.


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