How can I feed the outputs of a predict block back into its inputs?

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teasy 2022-1-12

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https://ww2.mathworks.cn/matlabcentral/answers/1627425-how-can-i-feed-the-outputs-of-a-predict-block-back-into-its-inputs

评论： teasy 2022-1-13

Hello all,

I would like to return the outputs of a Predict block to its input in Simulink. In the Predict block I use a neural network of type DLNetwork, which is forward directed (not recursive). As input format I use 'CT'. The network expects 5 inputs and gives 2 outputs. If I do not feed back the inputs, everything works. Here is a minimal example:

But when I feed back the inputs, I get the following error messages:

Layer 'Input': Invalid input data. Invalid size of channel dimension. Layer expects input with channel dimension size 5 but received input with size 1. Function 'Predict1/MLFB' (#1113.64.309), line 2, column 19: "deep.blocks.internal.deepNetwork({in_1}, {size(in_1)}, {class(in_1)}, coder.cons" Launch diagnostic report.
'untitled1/Predict1/MLFB' or the model referenced by it contains a block that updates persistent or state variables while computing outputs and is not supported in an algebraic loop. It is in an algebraic loop with the following blocks.

How do I manage in Simulink to return the outputs of the Predict block without getting an error?

Many thanks in advance.