COUNTER WEIGHT 1

[swcaddesigner]

Calling on hard-core mechanical engineers. I am an ME but this is above me.

I have a rotating structure A that rotates at a slow 1 rpm. Attached to one end via a turn-table bearing I have structure B.

I do not want B to rotate and cannot fix it to any thing external. There will be a very small force wanting it to rock slightly which I do not want. How can I hold it stationary? A friend mentioned a Coriolis effect
or a flywheel with a motor attached to keep B stationary.

Any thoughts would be most appreciated.

 

[FeX32]

Here is another idea if you want.

You can use an off center mass, say on a flywheel or something, that is proportionally controlled by a simple feedback from the bearing between the 2 parts. This way you can tune the P so that it is always perfectly center and not moving.
I have a feeling passive solutions to this problem will lead to errors for sure.
And since you were considering a gyro in the beginning it means you have no problem putting a little motor on it.


Fe (IronX32)

 

[MikeMech]

If you can get power to A, install an appropriately sensitive tilt sensor that controls an appropriately sized motorized flywheel or similar that will produce an offsetting torque. A simple linear feedback loop.

If there is no power available, a heavy weight hanging straight down and rigidly connected to A would be good.

If the bearing seized, A is going to spin no matter what you do unless you install a very low strength shear pin or the like between A and the bearing. You have not said what the consequences are if A does start to rotate.