I want to make a simulation model of the given function. Can you help me ??

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Shiv Nileshkumar Matliwala
评论： Shiv Nileshkumar Matliwala 2022-9-15
function y = fcn(u,t)
t_span = 10
y = u(t_span-t) ;
%input u = sin-wave
Here, this is the matlab function inside the matlab function block in simulink. Now as an input I have given sine wave with simulation time as a parameter not external signal as time. But now i want to use the time 't' inside the equation like given above inside the function equation. Then how can i define time 't' and use it inside the equation ??

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回答（1 个）

Walter Roberson
Walter Roberson 2022-9-13
If t is simulation time, then it will likely be non-integer, and you would be trying to index by a non-integer.
If u were the sine function instead of being a signal, then
sin(t_span - t) = -sin(t - t_span)
which is negative of sin with a delay. It would probably be easier to take a sine wave generator and put it through a delay of t_span and then take the negative of the delayed signal -- which are all things you can do without using a MATLAB Function Block.
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