How to update variant subsystem in Test Sequence?

I am using Variant Subsystem in my model and it is controlled by a parameter, e.g.

variant 1 when Build_Variant ==0;

variant 2 when Build_Variant ==1;

The question is that in a single Simulink test harness with Test Sequence, is that possible to control and test the switching of two vairants for different senarios in Test Sequence?

Many thanks in advance.

Answer 1

[Rajanya]

Hi @Xiang Wang,

I understand that you want to automate the testing of your subsystems by using the ‘test sequence’ block to switch between the subsystems dynamically in a single test harness. However, to the best of my knowledge, such dynamic switching of subsystems based on a signal or parameter output is not supported in Simulink as it works with workspace variables which are modified only after the simulation ends.

As a workaround, you can try using logic and conditional blocks with the output signal of the ‘test sequence’ to activate the desired subsystems based on the state/step changes in any scenario of the ‘test sequence’ block. Although this would not be a ‘variant subsystem’ test harness but would be sufficient to test the working of all the subsystems automatically.

Please refer the following documentation for more information on ‘Variant Control Switch’ -

https://in.mathworks.com/help/releases/R2020b/simulink/ug/approaches-to-control-active-variant-choice-of-a-variant-subsystem.html#mw_c66d2c36-c2d4-4c3a-9dec-3ea9c6319ed6

Hope this helps.