TF function on Simulink
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Hello I am trying to create a MATLAB function on simulink that ,between others, requires the use of the 'tf' function . Problem is I can't really find a way to use the output of the 'tf' function since it's an mxarray. So when I run something like this
function y = fcn(u)
%#codegen
coder.extrinsic('tf')
g=tf([1],[1 1]);
y=0;
y=g*u;
I get this error: MATLAB expression 'mtimes' is not numeric. Block MATLAB Function (#36) While executing: none . Initializing g gives me the 'is not numeric' error so it won't help... So I was wondering if there is anyway to get it done - the scripting way, I know I can use transfer function simulink blocks etc...Thanks in advance. (I am using Matlab R2012b btw)
4 个评论
Azzi Abdelmalek
2014-2-28
编辑：Azzi Abdelmalek
2014-2-28
What do you want to do?
Manos
2014-2-28
Ryan Rizzo
2018-3-21
Hi Manos, how did you manage to solve this issue?
回答（1 个）
Rick Rosson
2014-2-28
0 个投票
Multiplication is not the same thing as convolution. This approach will not work. You need to write a function that performs continuous time convolution. The only way to do that is to approximate the solution by approximating the continuous integral as a discrete summation over a small sample size. It should be possible, but not easy or fun.
Why not just use the TF block provided by a Simulink? No sense reinventing the wheel.
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2018-3-21
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