Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.physics.relativity > #358944

Re: Sensors in Motion Launches MEMS-Based Inertial Nav System

Cross-posted to 2 groups.

Show all headers | View raw

kefischer wrote:

>>Not the magnetic. If you rotate 360° in whatever direction, the
>>orientation of the magnetic line will stay fixed. Its magnitude (Earth)
>>may vary around 0.5 gauss, but this is not an issue. (0.25 to 0.65 gauss
>>around the world)
>>
>>The accelerometer use to have a bit of drift, however, the gravity
>>direction line is again, still fixed. (the dis-alignment of the axis are
>>specified by the manufacturer)
> 
>          Moron NYM-changing TROLL, the magnetic pole is presently
> somewhere in Northwest Canada, which is a different direction for
> everybody on Earth.

:) Does not matter where it is. The point is that the position of the pole 
does not change significantly enough (to be measurable) over a time period 
of days or hours. Ie is been said, rotating your sensor 360⁰, where do you 
think it will arrive exactly (at the end of that rotation)?

>          IMU components are readily available, but are useless
> for navigation.

Too bat you know nothing about anything.

>          The US Army Air Force in WWII had a device with
> inputs from gyros, pitot tube airspeed, barometric pressure and compass
> heading, but the longer the trip, the more it could be off.

Only because of the gyros (drift), as is been said, having no natural axis 
of reference. Use a brain, big mouth.

Back to sci.physics.relativity | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Re: Sensors in Motion Launches MEMS-Based Inertial Nav System kefischer <emoneyjoe@iglou.com> - 2015-07-26 15:40 -0400
  Re: Sensors in Motion Launches MEMS-Based Inertial Nav System wobbly <wobbly@dont-email.me> - 2015-07-28 22:14 +0000

csiph-web