Simscape resolver model variation

I am presently using the simscape resolver model ( https://uk.mathworks.com/help/physmod/sps/ref/resolver.html ) and as part of a larger model is functionally well.

I am interested in system impact due to disturbances and one such disturbance to consider is the orthogality. If I was to implement a pure mathematical model of a resolver in simulink (or excel, python, vhdl - all done), the inclusion of an orthogonal error is reletively trivial to include.

Since I am after using a multi-domain model, the electrical resolver model provides additional benefits (impedances when presented with a short) but I am unable to vary the sin/cos alignment. The resolver is also an encrypted model (*.sscp).

is there any recomendations with regards to mimicing an orthoronality error

Best regards,

Answer 1

[Joel Van Sickel]

Hello Jonathan,

a simple way to attempt to imlement this might be to inject a delay on the sensing side (to just one of the signals, thereby phase shifting them). This assumes you at some point have a Simulink based controller. However, this would be a fixed delay by default, and not ideally mimic a true sensor issue which would change based on frequency. You could scale the delay by frequency to adjust for this.

A more ideal solution, but taking much more effort, would be to generate a custom simscape model. This would give you access to modify the alignment of the sensor and keep the multi-domain aspect of it. If you think it is easier, you could implement the model in simulink and link it to simscape with controlled sources.

Here is wher to start with the Simscape language if you want to take this approach: https://www.mathworks.com/help/physmod/simscape/getting-started-with-simscape-language.html

If this is high priority, MathWorks does offer consulting services that could help you build a custom block.

Regards,

Joel