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Feng Wu
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How to generate a user-defined pulse input from excel at simulink stateflow

Asked by Feng Wu
on 18 Feb 2019
Latest activity Answered by Feng Wu
on 21 Feb 2019
Hi there,
I'm using stateflow in the simulink to do some modeling work. Basically, I wanna use some pulse signal to trigger the event in certain conditions. Followings are some simple model I developed.
1.PNG
2.PNG
I wonder how can I generate a pulse based on the input of excel file, for example the figure below:
3.PNG
Thanks in advance,
Feng

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2 Answers

Answer by Mundrathi Venugopal on 19 Feb 2019

You can take a signal builder block and import the excel file into the signal builder from its options.
Your pulse input to be specified must be represented in excel as follows.
e.g. time column followed by number of data columns(i.e, number of signals) in one sheet (i.e, one group in signal builder)
time value
0 0
2 0
2 1
8 1
8 0
10 0
i.e, you specified a pulse from time 2 ~8 and elsewhere it is 0.
We can generate this pulse signal from Chart using temporal instructions also if We wanted to.

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Answer by Feng Wu
on 21 Feb 2019

Hi Mundrathi,
Thanks for answering. I tried a lot these two days. It worked in some part. But it still has some problems.
The stateflow I developed is quite simple.
4.PNG
I use the excel as input for the signal builder, and I followed your instruction.
5.PNG
However, When I run the simulation, it didn't work very well as a pulse signal. see figure below. I can't figure out why it suddenly decreases to 0 when the input still equal to 1(purple line is the pulse input,yelow line is the output based on the stateflow before).
9.PNG
However, if I setting the simple time to 0.02 seconds(the existance time of pulse is 0.02s) in the simulation options in the singal builder, then it works well.
7.PNG
8.PNG
Sorry for the long replay. It gives me some headache. Could you give some suggestions?
many thanks,
Feng

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