FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups 
 ProfileProfile   PreferencesPreferences   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Forum index » Science and Technology » Physics
3D motion of an Object
Post new topic   Reply to topic Page 1 of 1 [1 Post] View previous topic :: View next topic
Author Message
science forum beginner

Joined: 07 Jul 2006
Posts: 1

PostPosted: Fri Jul 07, 2006 7:56 pm    Post subject: 3D motion of an Object Reply with quote

Hope this might be the right place to ask and is not to stupid a question

I am going to need to reconstruct the relative movement of an object in 3D
global space
I will have recorded samples of the linear accelerations and rotational
rates of the object based around its local orthogonal axis at a reasonable
sample period
I will have for-aft (Gx), left-right(Gy) and up-down (Gz) linear
accelerations together with Pitch rate (around y axis), Roll rate (around x
axis) and Yaw rate (around z axis) every 1 mSec with all axis relative to
the object.

The object is free to rotate or move in any axis

If the object was not free to rotate (so that its local axis stayed aligned
with a global axis) then I know I could integrate the linear accelerations
in each axis to get a velocity in each axis and then integrate again to get
a position in each axis, therefore being able to track the linear motion.

I also know that I could integrate each rotational rate about an axis to get
an angle of rotation about that axis and thus track the rotational movement.

Where I come completely unstuck is how to bring the two together when the
object can both rotate and move.
i.e. as the object rotates, its local axis becomes misaligned with the
global axis, so how do I track the position in a fixed reference space.

I have searched around on the internet, and seen some quite in depth
articles on dynamics but I find them impossible to follow.
Would appreciate some help and maybe some simple to follow equations or


Back to top

Back to top
Display posts from previous:   
Post new topic   Reply to topic Page 1 of 1 [1 Post] View previous topic :: View next topic
The time now is Fri Mar 22, 2019 4:11 am | All times are GMT
Forum index » Science and Technology » Physics
Jump to:  

Similar Topics
Topic Author Forum Replies Last Post
No new posts Is there a way to write out the process of the cumulative... Michael11 Math 1 Wed Jul 19, 2006 7:16 am
No new posts Relative motion from individual motion kenseto Relativity 79 Mon Jul 17, 2006 10:16 am
No new posts Brownian motion, covariance Ken Honda Math 1 Sun Jul 16, 2006 8:48 pm
No new posts Perpetual Motion Machines Rich1191 Physics 36 Fri Jun 23, 2006 2:01 am
No new posts Time dilation mirrors perpendicular to motion Zinc Potterman Relativity 20 Wed Jun 21, 2006 10:43 am

Copyright © 2004-2005 DeniX Solutions SRL
Other DeniX Solutions sites: Electronics forum |  Medicine forum |  Unix/Linux blog |  Unix/Linux documentation |  Unix/Linux forums  |  send newsletters

Powered by phpBB © 2001, 2005 phpBB Group
[ Time: 0.0112s ][ Queries: 16 (0.0023s) ][ GZIP on - Debug on ]