Simulink Test Harness Time Step Mismatch

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Richard Hopple
Richard Hopple 2017-11-27
评论： Richard Hopple 2017-12-5
Hi All.
I'm trying to create a test harness out of small model ("parent model") that calls a reference model. The parent model has the "fixed-step size (fundamental sample time)" set to '0.01' sec while the reference model has this set to '-1'. All blocks in the parent model have '-1' or 'Inf' for "Sample Time" (as best I can tell). I've checked this by displaying the sample time colors on the parent model (outside of the test harness) and by spot checking some of the blocks.
I'm running into an issue where, when I create a test harness for the parent model, the test harness's "Signal Conversion Subsystem" seems to be setting the time step 0.20 sec, & ignores the parent model's time step. I'm not sure how to get the parent model to execute at 0.01 sec when being called by the test harness. Any advice would be much appreciated.
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Young Ma
Young Ma 2017-12-5
Hi Richard,
Which version of MATLAB are you using? I tried to create a model in R2017b but could not reproduce the issue you had. I have attached the zipped models I created according to your description and the screenshots. Please feel free to use/update the model and let me know your reproduction steps and further questions.
Richard Hopple
Richard Hopple 2017-12-5
Turns out I have 1 block buried that had a default step step of 0.2 which was back propagating. Took a few days to find it.

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