Simulink bloc to check if a condition is true during a period of time
41 views (last 30 days)
Show older comments
Hi everyone, I wish to thank you for your time. I need to create a Simulink block: the input of the block is x, the output is outp. the simulation time is 10 steps (the unit I use to express time is the step of the simulation time, not seconds or minutes). The Simulink block does the following: if (x<0.9 during 5 steps of simulation time) then outp=1; Although it looks very easy but I have no idea on how to check the time condition. Any help is welcome. Thank you very much.
0 Comments
Answers (2)
Babak
on 7 May 2013
You can use a "Weighted Sample Time" block to know what's the sampling time and an "If" block to create a condition.
If you only care about counting the sampling times passed, you can also use a "Counter Free-Running" block that starts counting from 0 as soon as the simulation starts.
When you open the Simulink Library Browser, search for these three blocks' names and use them to make your model.
1 Comment
Babak
on 8 May 2013
in the weighted sample time, you can chose Ts only (or 1/Ts only) and u don't need an input. Output is not dependent on the input because the output is either Ts only (or 1/Ts only). But if you want to add something to Ts or multiply or divide,... you can use other options and it does the operation for you. Ts is the sampling time. I don't thin you need weighted sample time.. a counter works good enough for your case.
See Also
Categories
Find more on Sources in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!