# Questions tagged [gyroscopes]

A spinning wheel or disc in which the axis of rotation is free to assume any orientation by itself. When rotating, the orientation of this axis is unaffected by tilting or rotation of the mounting, according to the conservation of angular momentum. These devices are used for measuring or maintaining orientation and angular velocity.

304 questions
Filter by
Sorted by
Tagged with
74 views

### How to understand gyroscopes by using vectors?

I’ve seen plenty of videos explaining how gyroscopes work, but almost non of them why they are constrained to work in such way. From seeing only angular momentum vectors, how could one predict ...
102 views

### Is it possible to reproduce tennis racket theorem instability with a gymbal under earth gravitational field?

The tennis racket theorem (whose effect is also known as Dzhanibekov effect), states that the rotational motion around the intermediate principal axis is not stable (that is, any small disturbance ...
• 60
27 views

### Can a translational torque cause a change in rotational angular momentum? gyroscope example

Please confirm if my understanding is correct: The example of a gyroscope suspended from a pivot is a case in which translational torque causes a change in the direction of rotational angular momentum:...
35 views

### Spinning top stabilisation for a type of aircraft/drone

Spinning tops use gyroscopic precession to be able to stay upright whilst spinning. Would it be possible to use this phenomena to create a flying craft that would be stabilised by gravity and the ...
170 views

### What happens if we prevent gyroscope to precess?

If we apply some torque to spinning wheel in a vacuumed space in body frame y axis, wheel try to precess due to gyroscopic effect but it will be prevented by obstacles as seen from picture, what will ...
1 vote
168 views

### Torque applying on both rotating and non-rotating object

In rod reference frame: origin is center of the rod, pitching axis is coinciding with the rod external torque is applied in rolling axis If a torque is applied to non-rotating object(the rod and the ...
1 vote
130 views

### In gyroscopic effect of a quadcopter, why does precession cause torque, not vice versa?

I don't know if the header corresponds to my actual quest but i will explain. In quadcopter dynamic equations of Newton-Euler formation that I have encountered in all academic publications, torque ...
1 vote
77 views

### When looking at Gyroscopes, does precession only occur if a force is applied perpendicular to the axis of rotation? or can it be a parallel force?

I am trying to simplify gyroscopic precession for PPL Helicopter students and in the process confused myself. Many texts define it as processing a force 90 degrees when the force is applied 'parallel ...
• 13
536 views

### Do gyroscopes still work inside event horizon?

Imagine a gyroscope falls into the event horizon of a supermassive black hole, what would happen to the gyroscope? will it remains in the same position before it falls into the event horizon?
• 13.1k
512 views

### When the gyro moves down, does it spin faster?

First, I have a gyro, $\omega$ is its angular velocity Then, I simple it to When it moves down, there is Gravity does work differently for A and B. Therefore, the angular velocity should be ...
• 351
72 views

### Moment of Inertia of a gyroscope

I saw that the moment of inertia could be calculated for bodies as the addition of the sum of their parts, so I was wondering if it could be calculated for the gyroscope that is pictured below I was ...
• 27
4k views

### Spinning gyroscope loses weight?

I ran two tests with a toy gyroscope spinning on a weighing scale that is accurate to $1$mg. The scale was reset to zero before the tests. The gyroscope was flipped over between test $1$ and test $2$. ...
• 5,955
23 views

### Why does a bullet precess in the opposite direction from gyroscope diagrams? [duplicate]

I am reposting this because it was not resolved when I first posted. Bullet spin causes a bullet to become a gyroscope. Specifically, bullets have their center of pressure in front of their center of ...
1 vote
167 views

### Conservation of Angular momentum for an irregular body rotating about three axes

I am having trouble understanding how conservation of momentum can be used to calculate final angular velocity for a body rotating in multiple axis with an asymmetrical MoI. Suppose a satellite is ...
24 views

### Two speeds of precession without nutation

I understand mathematically that when you look for solutions to the equations of motion of a spinning symmetric top with a constant inclination angle $\theta$, you get a quadratic equation with two ...
57 views

### Do gyroscopes show peculiar behavior during eclipses? [closed]

I'm curious about pendulums and their behavior during a solar eclipse. I also wonder about gyroscopes and if their behavior during stellar events has been observed. I wonder about the both of them, ...
11 views

### Angular Velocity measured by a UGV on a curved path is equivalent to Angular velocity of UGV on a straight path

Pre-Condition An FOG IMU is mounted on a high speed Autonomous Vehicle to track linear acceleration and angular velocity of the vehicle under dynamic conditions, Here FOG Z axis (accelerometer + ...
37 views

### Conservation of Angular Momentum, why does person rotate only one way?

As seen from the video that i linked, when the wheel is spinning then he doesnt rotate, but as soon as he flips the wheel he will start to rotate. Why he doesn't rotate both counter and anticlock wise?...
• 43
72 views

### Choice of axis in analysis of gyroscopic precession

In many demonstrations of analysis of gyroscopic precession, the analysis goes on by choosing two axes, one about which angular momentum is calculated, another about which torque of gravity is ...
• 427
36 views

### How do I compute the bounds of random walk for a given ellapsed time?

I am trying to model random walk of a gyro, given some manufacturer specifications of maximum random walk in units of degrees per root-hour. My first step was to generate white noise with a standard ...
• 133
22 views

• 544
69 views

### Will the inner gimbal continue to rotate if no friction?

The picture shows a gyroscope with a rotating disk. Adding a force to the outer gimbal from a certain direction causes the inner gimbal (plus the disk with bearings) to rotate as well. When the force ...
1 vote