Confirm a in signal for a specific time i.e. 5 seconds

Hello,

I need a simulink block that check if a timedependent signal is true for 5 seconds. But I have no idea how I can realised that. I would very much appreciate for any suggestion/help.

Peter

PS: Another, not so urgent, problem is delaying a timedependent signal for a specific time. What is the most robust method? So far I have used the Unit Delay block.

Answer 1

[Fangjun Jiang]

You can use an "Integrator" block for it. If the signal is false (low), re-set the integrator. If the signal is true (high), integrator the signal. Once the integration is larger than 5, you get the check to be true. Otherwise, it's false.

For delay, use the "Transport Delay" block from Simulink->Continuous library.