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Improved maximum likelihood estimation for nonlinear continuous-discrete system and its application to aircraft flight data compatibility checking

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4 Author(s)
Li Naihong ; Harbin Inst. of Technol., China ; Wu Yaohua ; Yang Di ; Hu Xiaoguang

Evans-Goodwin et al. (1985) presented a maximum likelihood algorithm for nonlinear continuous-discrete systems. Accounting for both the process and measurement noises, its filtering process is often numerical unstable and the calculation of sensitivities by using the finite-difference method needs to select the size of perturbation, these limit its validity in practical application. This paper gives a improved maximum likelihood method; an algorithm is given to determine the best perturbation. At the same time, a fast triangular formulation of square-root filter is used to replace the conventional one or the so called stabilized extended Kalman filter to improve the numerical stability of the algorithm given. A practical application to compatibility checking of flight test data indicate that the improved ML algorithm is more efficient.<>

Published in:

TENCON '93. Proceedings. Computer, Communication, Control and Power Engineering.1993 IEEE Region 10 Conference on  (Volume:4 )

Date of Conference:

19-21 Oct. 1993

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