Switching algorithm to avoid attitude representation singularity

Okasha, Mohamed Elsayed Aly Abd Elaziz and Newman, Brett (2009) Switching algorithm to avoid attitude representation singularity. In: AIAA Atmospheric Flight Mechanics Conference, 10-13 August 2009, Chicago, Illinois.

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Abstract

In this paper, the singularity associated with a minimal attitude parameterization using Euler angles is avoided by a switching algorithm. This algorithm is based on describing the attitude as a function of time with two sets of Euler angle sequences that possess nonconjunctive singularities. This property exists when the singularity causing values of the relevant rotation variables associated with any two Euler angle sequences do not materialize simultaneously. For a given Euler angle set, either antisymmetric or symmetric, another Euler angle set exists such that the pair of representations possesses nonconjunctive singularities. Conditions determining when, and when not, a pair of representations possess this property are developed and analyzed. Nonconjunctive symmetric-antisymmertic and antisymmetric-antisymmetric pairs always exist. This property is exploited by a switching algorithm which facilitates motion description with a minimal parameterization not hindered by singularities. This description may possess computational savings and allow continued use of insightful variables when compared with nonminimal representations such as Euler parameters. The algorithm is numerically demonstrated and validated by several nonlinear six degree of freedom simulation tests.

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	6908/38697
Uncontrolled Keywords:	Anti-symmetric; Attitude representation; Computational savings; Continued use; Euler angles; Euler parameters; Function of time; Motion description; Simulation tests; Six degree-of-freedom; Switching algorithms
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA329 Engineering mathematics. Engineering analysis T Technology > TA Engineering (General). Civil engineering (General) > TA349 Mechanics of engineering. Applied mechanics T Technology > TJ Mechanical engineering and machinery > TJ212 Control engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Dr Mohamed Okasha
Date Deposited:	14 Oct 2014 15:58
Last Modified:	14 Oct 2014 15:58
URI:	http://irep.iium.edu.my/id/eprint/38697

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