Failure in determining attitude and bank

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jhjeon82
Posts: 24
Joined: Mon Jan 28, 2008 3:51 pm

Failure in determining attitude and bank

Post by jhjeon82 » Mon May 12, 2008 8:12 pm

Hi,

While I'm gathering data, I confronted weird phenomena with attitude and bank data. In some cases, attitude is 180 degs and bank is 0. And heading is not a fixed value, but it's wrong. In those cases, quaternions seemed to be still correct. So I'm just suspicious that those are some kinds of failures in determining attitude, bank, and heading in algorithm, and 180 & 0 are initial values.

Below, att_cal means calculated value using quaternions, and so on. (How can I attach some codes or data?)

Thanks,

frame attitude bank heading qx qy qz qw att_cal bank_cal heading_cal squared error
30502 1.570796 0 0.123603 -0.043534 0.707986 0.04377 0.703523 1.564445838 2.991407119 -3.043903905 18.98165687
30585 1.570796 0 0.196467 -0.067455 0.724081 0.051583 0.684468 1.510448299 -2.845462263 -2.676586981 16.35473651
30504 1.570796 0 0.103638 -0.03647 0.709075 0.037914 0.703168 1.562211006 2.854860674 2.963568216 16.32950401
30505 1.570796 0 0.104406 -0.036807 0.707926 0.035463 0.704435 1.565557409 -2.856672573 -2.745572281 16.28298183
30581 1.570796 0 0.16773 -0.057746 0.723147 0.042739 0.686947 1.515351639 -2.818752648 -2.676800089 16.03979199

Birch
Posts: 1139
Joined: Thu Jan 30, 2003 5:00 am
Location: Corvallis, Oregon

Re: Failure in determining attitude and bank

Post by Birch » Mon May 12, 2008 9:48 pm

Hello,

The easiest way to attach some code is to send an email to support@naturalpoint.com, please the description of the problem that you wrote in your post.

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