Checking values with Simulink

Hello, i'm working with the Fault-Tolerant Fuel Control System and i want to check when the fuel-ratio value goes down to 0 and check if it remains in this state for 1 second (on continuos time). How i can do it with Simulink blocks?

Thanks

[Walter Roberson]

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Answer 1

[Ryan G]

You could use something like this reset timer on the File Exchange. The input would be the fuel ratio using a compare to 0 block set to compare when greater than 0. You can then compare the output to see when it is greater than 1.

Answer 2

[Fabio]

Thank you very much. This is exactly what I was looking for.