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  • 1
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    Direct inversion of rigid-body rotational dynamics (1990)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The global linearization (inversion) of rigid-body rotational dynamics is reviewed, and representations in terms of quaternions and direction cosines are compared. Certain properties common to quaternions and direction cosines that make their use preferable to Euler angles and that simplify the inversion procedure are described. Applications of the inversion procedure for state estimation and attitude control are discussed. To avoid complexities caused by aerodynamics, an example of direct inversion for linear feedback control of spacecraft attitude is given.
    Keywords: CYBERNETICS
    Format: text
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  • 2
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    Filtering and smoothing techniques for parameter estimation (1976)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: In this paper filtering and smoothing criteria for maximum-likelihood parameter estimation are described and compared. It is shown that the parameter estimate using the smoothing criterion may be obtained independently of the smoothed state estimate. Monte Carlo test results are presented comparing the efficiency of the estimation procedures.
    Keywords: CYBERNETICS
    Type: Annual Asilomar Conference on Circuits, Systems, and Computers; Nov 03, 1975 - Nov 05, 1975; Pacific Grove, CA
    Format: text
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    NASA TECHNICAL REPORTS
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