Short Communication: Determining the average attitude of a rigid body

Three-dimensional angular kinematics exist on the surface of a unit hypersphere, therefore the average attitude cannot always be accurately computed by averaging Cardan angles. This study derives and evaluates a method for determining average body attitude, by exploiting the singular value decomposition of the average of a set of attitude matrices. To test the method 1000 criterion attitudes were determined, and for each attitude 10 noisy attitude matrices generated. The new method and the averaging of Cardan angles extracted from the 10 noisy attitude matrices were evaluated for their ability to estimate the criterion attitude. At low attitude variance the two approaches provided equivalent results, but with increasing attitude variance levels the new procedure was superior. The method provides superior estimates of average attitude compared with averaging Cardan angles, by accounting for the geometric distribution of rigid body attitudes on the surface of a unit hypersphere.

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Work Title Short Communication: Determining the average attitude of a rigid body
Access
Open Access
Creators
  1. John H. Challis
Keyword
  1. Orientation
  2. Averaging
  3. Hypersphere
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Journal of Biomechanics
Publication Date December 20, 2019
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.jbiomech.2019.109492
Deposited July 24, 2022

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Version 1
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  • Created
  • Added Challis_AngleAverage_JournalOfBiomechanics.pdf
  • Added Creator John H. Challis
  • Published

Version 2
published

  • Created
  • Updated Work Title Show Changes
    Work Title
    • Short Communication
    • Determining the average attitude of a rigid body
  • Deleted Challis_AngleAverage_JournalOfBiomechanics.pdf
  • Added Challis_AngleAverage_JournalOfBiomechanics.pdf
  • Published
  • Updated Work Title, Keyword, Subtitle, and 1 more Show Changes
    Work Title
    • Determining the average attitude of a rigid body
    • Short Communication: Determining the average attitude of a rigid body
    Keyword
    • Orientation, Averaging, Hypersphere
    Subtitle
    • Determining the average attitude of a rigid body
    Publication Date
    • 2020-01-02
    • 2019-12-20