How to implement a simulink model to perform Matrix multiplication ?

Question

Shravankumar P 2014-8-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/145331-how-to-implement-a-simulink-model-to-perform-matrix-multiplication

评论： Satheesh Appukuttan 2019-12-10

 A =
     8     1     6
     3     5     7
     4     9     2
>> B=magic(3)
B =
     8     1     6
     3     5     7
     4     9     2
>> C=A*B
C =
    91    67    67
    67    91    67
    67    67    91
How to model this.

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Answer 1

Christopher Berry 2014-8-7

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https://ww2.mathworks.cn/matlabcentral/answers/145331-how-to-implement-a-simulink-model-to-perform-matrix-multiplication#answer_147808

Matrix multiplication in Simulink is almost as easy as it is in MATLAB itself. See the block diagram below:

Select a Constant block for your matrix and use magic(3) as the "Constant Value". Then, select a Product bock to perform the multiplication. This Product block performs both element multiplication .* as well as matrix * multiplication, so you will have to select which one you would like from the "Multiplication" drop down inside the block parameters.

Then, use the To Workspace block to output your result to the Workspace so you can check it.

Just note that unlike MATLAB, Simulink always has a built notion of time, so this setup will calculate C = A*A at every timestep, so select an appropriate step size/simulation time to avoid wasted computations!

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Satheesh Appukuttan 2019-12-10

Similar to this question. I would like to perform a element wise multiplication 2 matrices. for example

say I have MxN and Nx1 matrix. I would like to implement using one product block by shifting input data. that way I will be using only one multiplier. How do I shift the data in simulink,so that element wise multiplication can be done by single product block with 2 scalar inputs.

For eg: [ 2 3 ] [ 1 = 2+6

2]

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