In Simmechanics, Should the body sensor give zero (angular) velocity or not if a body frame is used?

Hi,

I have a simmechanics model and I am using a body sensor to record the angular velocity of a long rod.

the rod is rotate around 2 axes but it can not rotate along its longitudinal axes.

What I need is to have two nonzero angular velocity and a zero angular velocities. So I tried to sense the angular velocity relative to the body frame (rather than global frame). But still all the three angular velocities are nonzero!

Thanks,

[Ryan G]

What type of joint are you using? You can usually sense from the joint directly.

Also, SimMechanics 2G has been out for a year or two now. I would suggest using that if you have access.