stateflow

Hi all, Here I am using "after(0.025, sec)" in statechart for generating pulse, but when it wached on scope,its generating at 0.03, why is the difference. Can any help me how to make exact at 0.025.

[Gerd]

Hi Murali,

what is the update interval of your simulink model. How did you manage to have the 0.025sec?

Gerd

[Arnaud Miege]

Also, how often does your chart update?

[Murali Mohan]

sample time provided for the model is 0.01

Answer 1

[Gerd]

Hi Murali,

using a sample time of 0.01s for your model lets you only generate pulses with a multiple of the basic sample time(0.01 / 0.02 / 0.03) If you want to generate a pulse of 0.025 you have to increase your sample time to e.g. 0.001s

Gerd

[Murali Mohan]

Thans Gerd,

I am tried with your ans, but still the same.

Pls refer stateflow example of "sf_abstemporal_basic.mdl" present in matlab. change the step time to 0.1 to 0.01 In chart "WithAbsoluteTime":make the transition as "after(0.025,sec)" Observed result is generating the pulse @0.03sec, can any one explains why? how to get the exactly at 0.025.

Let me know if any details required

[Gerd]

Murali,

please open the model.

Double click on the upper chart "With absolute Time".

Change the transition to "After(0.025,sec)".

Hit Ctrl+E. Change the fundamental sample time to 0.001.

Open the scope and open Parameter pane. Go to "History".

Deselect Limit data points to last.

Run the model and observe the result.

I did these steps and the result is Ok

[Murali Mohan]

Thanks Gerd for your reply :)