How to simulate bearing resistance if I have Torque vs. Angular Velocity data to describe that resistance?

Question asked by Conor Cullinane on Feb 24, 2017

I have Torque vs. Angular Velocity data that describes the resistance of a bearing (for this purpose just consider the bearing to be two circular pieces rotating relative to each other).

I want to use that data in the Motion Analysis simulation of the bearing rotation. I have a motor where I define the angular velocity of the bearing. Now I need to define the resistance somehow so that the motor "sees" a realistic resistance to the defined motion.

I have tried using the torsional damper tool, but the options for defining the resistance are limited (Cx^e) where e can be -1,-2,-3,-4,1,2,3,4. C is defined by me. My data is fit well with a second degree polynomial.

I have also tried applying the resistance as a negative torque vs the angular velocity of the bearing. This gives me the proper results, except the magnitude is way way off, like in the millions of in-lbs.

Thx