Izvestiya of Saratov University.

Mathematics. Mechanics. Informatics

ISSN 1816-9791 (Print)
ISSN 2541-9005 (Online)

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Chelnokov Y. N., Perelyaev S. E., Chelnokova L. A. An Investigation of Algorithms for Estimating the Inertial Orientation of a Moving Object. Izvestiya of Saratov University. Mathematics. Mechanics. Informatics, 2016, vol. 16, iss. 1, pp. 80-95. DOI: 10.18500/1816-9791-2016-16-1-80-95, EDN: VUSOFL

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An Investigation of Algorithms for Estimating the Inertial Orientation of a Moving Object

Chelnokov Yurii Nikolaevich, Saratov State University
Perelyaev Sergei Egororovich, "AeroSpetsProekt" Ltd.
Chelnokova Lyudmila Aleksandrovna, Institute of Precision Mechanics and Control, Russian Academy of Sciences (IPTMU RAS)

The new and known strapdown INS algorithms for high-precision estimation of the orientation parameters of a moving object (Rodrigues–Hamilton (Euler) parameters) in the inertial frame are nvestigated. The new algorithms are based upon using the classical Hamilton rotation quaternion, quaternion with zero scalar part, which is correlated to the classical rotation quaternion via the quaternion equivalent of Cayley formula, and also the new quaternion differential equation for the inertial orientation of a moving object. The newalgorithms are developed using thePicard successive approximation method. These algorithms usethe integral raw information about absolute angular motion of an object as input data. It is demonstrated that the new algorithms are superior to the known algorithms of the same order regarding accuracy and complexity.

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