How can i mutiply variable in simulink

i got a problem with the equation: t*y(t)''+4y(t)'+2y(t)=4 How can i mutiply y(t)'' by variable 't' in simulink? Gain is not working with 't' \

Answer 1

[Azzi Abdelmalek]

Use a clock block to get the time t

[Nguyen]

t is not the time, t is a variable(like x). Can you help?

[Azzi Abdelmalek]

How did you realize y''(t) in simulink?

[Nguyen]

with two integrator. x*y(x)''+4y(x)'+2y(x)=4.

[Azzi Abdelmalek]

That means x represents time

[Azzi Abdelmalek]

even x does not represent time, use a clock to get your variable value

[Nguyen]

ok, thanks.