i want to know the way of using the neural nets as a block in simulink, i've used them as matlab functions and s-functions simply writing the code, but i wonder if i can use the already matlab /simulink integrated apps of neural networks in more specific "online" applications like control loops where i have an error to be optimized which is in most of the cases not related to the inputs or the outputs of the neural network.
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http://fr.mathworks.com/help/nnet/ref/gensim.html
might be your answer if i have understood your question
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hello, Salah! It's interesting question, I had simulated neural networks for the need of flux observer for electric drives with direct torque control as a part of my diploma. It was almost 10 years ago and unfortunately all my models are gone. But, maybe, the manual below will be helpful for you. Best wishes!
http://staff.ttu.ee/~jmajak/Neural_networks_basics_.pdf
Thank you @Fabrice Clerot @Alexander Pugachev but i think you didn't understand my question, i want to use a simulink block (neural network) that learns "online " , when i start the simulation it starts to learn and its results have a pivotal effect on my control loop , at first it learns then when the error reach a very small amount the teacher disconnects ( the teacher:any other control strategy) and the simulink block (neural network) takes the lead, i've already made one but with the simplest neural networks and learning algorithms for which i'm not very satisfied and i wonder if i can use the already built up matlab algorithms for neural networks for that they are faster and more efficient, i hope i made it clearer now.
You can use neural network control blocks in simulink itself or otherwise can find some custom neural network simulink blocks in Matlab Central.
@Anirudh Nath thank you so there are no other ways than coding every algorithm from scratch !
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sorry for the misunderstanding ; i never tested that but you may find something down this link
http://www.mathworks.com/matlabcentral/answers/101260-is-it-possible-to-use-simulink-to-train-a-neural-network
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thank you very much @Fabrice Cierot your answer is quite valuable.
Hello, Salah! Yes, there was an obvious misunderstanding. Actually, when I trained the ann I used the block "to workspace" to transmit some data from Simulink. A short survey of internet works shows that this is still a popular way to train ann. But in this article (available for free) the 'online learning' ann is utilized. It's written a little about it, but nevertheless... Good luck with this!
http://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=2228&context=faculty_work
thank you @Alexander Pugachev for your contribution i'll check it right away.
You can use the GENSIM command from the Neural Network Toolbox to export the network to Simulink and simulate it
Thanks @khadija El hamidi Gensim is used to generate a simulink block after neural network creation in workspace and after adaptation or training, my quest is for the usage of neural networks on-line.
Hi Salah,
I have the same Problem with you, did you find any good solution for online Training using simulink? I am working on NARMA L2 Controller, but I don't understand how to train this controller with two subnetworks (y-f)/g = u.( I have y and u and need to find function f and g)
If anyone can help, I will appreciate it.
Hao
Hello
Not in online training applications, Gensim will generate a simulink model but after training, meaning that all the optimal weights have been found and fixed.
Salah Eddine Ghamri
I also dealing with ann control in simulink. I have trained my data and obtained some results but i need to apply trained network into my simulink block diagram for feedback control of the system transfer function. If you have knowledge about that please let me know. Thank you
Şaban Ulus You have the weights and the topology of your Neural network. You should now reproduce the matrix multiplications with weights from inputs till the output. This is long method if your model is simple. IF you used the newnet function of matlab you can then generate a simulink model after training using Gensim function. It is the same thing after all but Gensim is hustle los.
Salah Eddine Ghamri thank you for your valuable info , i will try it but i need it to apply in simulink like a PID feedback system
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