Jump to content

File:Gyroscopic precession 256x256.png

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

Gyroscopic_precession_256x256.png (256 × 256 pixels, file size: 16 KB, MIME type: image/png)

Summary

Description
Deutsch: Kreisel in kardanischer Aufhängung. Beschriftet für Erklärung der Kreiselmomente als direkte Folge von Coriolis-Kräften. Kann Präzession und Selbstfindung der Nordrichtung von Kreiselkompassen verdeutlichen.
English: Turnable gimbal holding gyro. Labelled to explain coriolisforces as reason of momentum generated by applying a momentum to the gyro. Suitable to explain precession as well as self-actuating orientation to north of a gyrocompass.

From inside to outside there are three axes of rotation: the hub of the wheel, the gimbal axis and the vertical pivot.

To distinguish between the two horizontal axes, rotation around the wheel hub will be called 'rolling,' and rotation around the gimbal axis will be called 'pitching.'

First, imagine that the device is rotating around the pivot axis. Then some rotation around the wheelhub is added. Imagine the gimbal axis to be locked, so that the wheel cannot pitch. The gimbal axis has sensors, that measure whether there is a torque around the gimbal axis.

The device is spinning around the vertical axis, and then some roll is added. In the picture, a section of the wheel has been named 'dm1'. When the rolling starts, section dm1 is at the perimeter of the spinning motion. Section dm1 has a lot of velocity and as it is forced closer to the center of rotation, it tends to move in the direction of the top-left arrow in the diagram (shown at 45o in the direction of rolling). Section dm2 of the wheel starts out at the center of rotation, and thus initially has zero velocity. A force would be required to increase section dm2's velocity to the velocity at the perimeter of the pivot axis' plane. If that force is not provided then section dm2's inertia will make it move in the direction of the top-right arrow. Note that both arrows point in the same direction.

The same reasoning applies for the bottom half of the wheel, but there the arrows point in the opposite direction to that of the top arrows. Combined over the entire wheel, there is a torque around the gimbal axis when some rolling is added to rotation around a vertical axis.

It is important to note that the torque arises without any delay; the response is instantaneous.
Date
Source Image created with the help of POV-ray ray-tracing software.
Author Cleonis at en.wikipedia

Licensing

w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

Original upload log

The original description page was here. All following user names refer to en.wikipedia.
  • 2007-04-03 21:20 Cleonis 256×256× (16844 bytes)
  • 2007-04-03 21:19 Cleonis 1024×1024× (56775 bytes) '''Description:''' <br/> The device depicted here is [[gimbal]] mounted. From inside to outside there are three axes of rotation: the hub of the wheel, the gimbal axis and the vertical pivot. To distinguis between the two horizontal axes, rotation aroun (version lost by MediaWiki)


Licensing

w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

3 April 2007

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current23:53, 4 July 2011Thumbnail for version as of 23:53, 4 July 2011256 × 256 (16 KB)Pyrometer

The following page uses this file:

Global file usage

The following other wikis use this file: