- #1
JTC
- 100
- 6
Hi,
Forgive me for this trivial question. I am confused.
Let's say I have a gyroscopic device in which the rotor is set to spin at a prescribed angular velocity.
Next, put it on an ocean surface in which the ocean waves induce a precession.
These two rotations, then induce a moment (induce a nutation), M (I name this torque, because my question is about this).
Power is the angular velocity times the moment.
Now suppose I set up the equations -- and input the precession and spin -- and get a system in which I compute the angular velocity corresponding to the nutation.
So how do engineers calculate power. It seems I can calculate the induced angular velocity or the induced angular moment (one or the other), but now do we calculate the power: I have one or the other, but not both.
In other words, in my naive understanding, I can generate an angular velocity. If I restrain the angular velocity, I can get an induced moment. But if it is free to rotate, how does one compute the power?
I must be missing a big step.
Forgive me for this trivial question. I am confused.
Let's say I have a gyroscopic device in which the rotor is set to spin at a prescribed angular velocity.
Next, put it on an ocean surface in which the ocean waves induce a precession.
These two rotations, then induce a moment (induce a nutation), M (I name this torque, because my question is about this).
Power is the angular velocity times the moment.
Now suppose I set up the equations -- and input the precession and spin -- and get a system in which I compute the angular velocity corresponding to the nutation.
So how do engineers calculate power. It seems I can calculate the induced angular velocity or the induced angular moment (one or the other), but now do we calculate the power: I have one or the other, but not both.
In other words, in my naive understanding, I can generate an angular velocity. If I restrain the angular velocity, I can get an induced moment. But if it is free to rotate, how does one compute the power?
I must be missing a big step.