How can I hold an impulse value for a given time period using Simulink?

Hi

I am doing some research using Simulink, and want to hold an impulse value for a given time period.

For example, if the input is an impulse at t = 10, that is,

x(t) = 1 (10 <= t <= 10.02), 0 (elsewhere),

then my desired output is the following:

y(t) = 1 (10 <= t <= 15), 0 (elsewhere).

In other words, I want to hold the impulse value (1) for five more seconds.

How can I do this?

Thanks in advance. :)

Answer 1

[Azzi Abdelmalek]

Use a zoh block with sample time set to 5

[Hancheol]

Hi Azzi Thanks for your answer. ;) You're right. I tried a simulation in which I had created an impulse, added a zoh, and got a successful result. But when I try this to my situation, it does not work. In my case the impulse (input) comes from an 'edge detector' block, and I'm wondering if this affects the results...

[Azzi Abdelmalek]

I think it's not a good solution, because the zoh block will hold during 5s the first value, if it's the high value of your pulse (suppose 1), then the zoh will hold the value 1 during 5s, and if it's 0, then 0 will be hold). We should find another solution