Parametric identification of discontinuous nonlinearities

Jategaonkar, RV (1985) Parametric identification of discontinuous nonlinearities. In: Identification and system parameter estimation 1985, 3-7 July 1985, Identification and system parameter estimation 1985.

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Abstract

The present paper proposes a technique to identify systems with discontinuous nonlinearities. A well-established maximum likelihood estimation method has been suitably extended for this purpose. The technique enjoys the desired properties of consistency, efficiency, and unbiased estimates associated with the maximum likelihood estimation. The estimation method has been illustrated using a second-order dynamic system which incorporates specific nonlinear elements viz.: hysteresis and deadband plus saturation. Effects of additive noise on the parameter estimates have also been presented. Practical utility of the technique has been demonstrated in identifying from flight test data the discontinuous nonlinear effects in the control surface actuator system of an aircraft. (Author)

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Nonlinearity;Identification;Maximum likelihood estimation;Eficiency;Atuators;Hysteresis;Dynamical systems;Additives;Flight testing;Dynamic control surfaces;utilities;parameter estimation;presses;noise; aircraft; dynamical systems;nonlenear systems;parameter identification.
Subjects: MATHEMATICAL AND COMPUTER SCIENCES > Cybernetics, Artificial Intelligence and Robotics
Division/Department: Flight Mechanics and Control Division
Depositing User: M/S ICAST NAL
Date Deposited: 11 Oct 2006
Last Modified: 24 May 2010 09:51
URI: http://nal-ir.nal.res.in/id/eprint/2938

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