simscape/simelectronics stepper motor model not compatible with fuzzy logic controller?

hi all, i have a project where im supposed to compare fuzzy and pid controllers for wind turbine yaw movement. Stepper motors are appropriate for this purpose but i cant seem to use the simscape stepper model ( elec_controlled_stepper.mdl) with fuzzy controller. It outputs model error and tons of errors for every block. I want to use the controller just to compute the number of pulses at the driver input that correspond to angle degrees. Some of the errors are: Input data dependency violation due to action subsystems. See Subsystem Examples in the Simulink library for valid and invalid examples of action subsystems. Input ports (Action) of 'simstepper/Fuzzy Logic Controller/FIS Wizard/Defuzzification1/Action: One' are involved in the loop* ( this error comes for every fuzzy controller block)

[K E]

While I don't know the answer to your question, perhaps this FEX submission may help. Wish there was more Simscape traffic here to help you.

Answer 1

[Guy Rouleau]

As the error says... I recommend looking at the Subsystems Examples.

More specificaly, give a look as "sl_subsys_semantics.mdl". You will see many examples and one of them should be representative of your situation.

Based on your comments, it looks like you have an Enabled/Triggered/Fcn-call subsystem in a loop. To give a chance to the Simulink engine to resolve the system, you will need to add a delay in the loop.

Answer 2

[giorgis]

i finally switched to a simpowersystems stepper motor model and it works fine, thanx for the answers though