problem with if/else if block

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Christine 2019-9-20

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https://ww2.mathworks.cn/matlabcentral/answers/481309-problem-with-if-else-if-block

评论： Urmila Rajpurohith 2019-11-14

Hello,

I will try to be as clear as possible: I have a problem with if/else if block and maybe it comes from sampling time that I've never used before...

Here's a subsystem B:

this subsystem is inside a bigger one A

FRB and HDB are coming from outside of A, from excel spreadsheet, with sampling time 3600

Tb1 enters into B, coming from A itself, so no condition of sampling applied

Inside B I have :

when I plot TB1, it comes as it should (confronting with the plot where Tb1 is generated), but when I go into the if block:

and I plot again TB1, I have a different graph, constant as if it was "maintaining" the value for 3600s since signals HDB and FRB comes from the worksheet with this sampling time...

I know nothing about sampling time and I really don't know how to deal with that.

My excel sheet is very big and I have data every hour (3600s) that is why I put this sampling time, nowhere in my model I have put this condition but Ii think that everywhere these data will be in use, I will encounter this problem.

Thank you for any help/advice/comment

Christine