Calculate vector norm in Simulink?

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Joshua
Joshua el 8 de Abr. de 2013
Comentada: Steven Crews el 21 de Abr. de 2021
Is there a block that finds the norm of a vector in simulink? I haven't found the equivalent to norm(v) from MATLAB.
Thanks!

Respuesta aceptada

Jon
Jon el 8 de Abr. de 2013
You can use the dot product block (with the same vector wired to both inputs) followed by a square root. Both are under the Math Operations library. I think the previously suggested abs block computes the absolute values of each element of the input vector.

Más respuestas (4)

Youssef  Khmou
Youssef Khmou el 8 de Abr. de 2013
hi, it does exist, its called "abs" , open Simulink library and go to :"Math operations" block , its the first on the list, with notation u : ABS
  2 comentarios
Jon
Jon el 8 de Abr. de 2013
As noted in my alternative answer, I don't this this gives you what you want. As far as I can tell abs gives the element wise absolute values, not the norm
Steven Crews
Steven Crews el 21 de Abr. de 2021
Agreed. This is not the correct answer.

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Joshua
Joshua el 8 de Abr. de 2013
Thanks!

Youssef  Khmou
Youssef Khmou el 8 de Abr. de 2013
hi, if the first answer does not work, you can use other ways, like :
1) go to " User Defined Functions" in Simulink Block .
2) choose "f(u)" FCN, add it to your file , right click on it you will find the default value :
sin(u(1)*exp(2.3*(-u(2))))
change it to
"norm(u)"
  4 comentarios
Jon
Jon el 9 de Abr. de 2013
I couldn't find and "Embeded function" Do you mean the Interpreted MATLAB Fcn under User Defined Functions? The Interpreted MATLAB Fcn works, but I would guess that the dot product block, followed by the sqrt block is faster, because it doesn't need to be interpreted.
Youssef  Khmou
Youssef Khmou el 9 de Abr. de 2013
yes the Fcn component...

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DEBASISH MISHRA
DEBASISH MISHRA el 9 de Ag. de 2019
Hi,
You may direct use matrix 1-norms from dsp tool box.
Thanks

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