MATLAB: How to create a custom damper component on Simscape

Question

I am trying to create a custom damper for a Quarter of Vehicle Simscape model on Simulink. I am currently using a Force Source and connecting my force signal by means of a Simulink to PS converter. The problem is that I need the deflection velocity calculated by the same model in order to produce a certain damping force. Hence, I run into a Algebraic Loop issue, which I have not been able to resolve.

I would like to create a custom damper if possible, which I could just connect in place of a regular damper on Simscape.

Thank you for the help!!

Answer 1

I assume you have something like this:

https://picasaweb.google.com/lh/photo/-wyO717K8a1EwQIJJ8Khaw?feat=directlink

Going in and out of Simulink causes the algebraic loop. Instead try using the PS Look-up Table (1D) as in:

https://picasaweb.google.com/lh/photo/teP1V1uUT2UhoPbKMRB5Tw?feat=directlink

Using physical signals and staying within the Simscape network will avoid algebraic loop and should get rid of your problem. Make sure to use data in m/s and N for the PS Look-up table.

HTH,

Arnaud