PARAMETER IDENTIFICATION FOR SOME LINEAR SYSTEMS WITH FRACTIONAL BROWNIAN MOTION
T. E. Duncan** B. Pasik-Duncan***
Department of Mathematics, University of Kansas, Lawrence, KS 66045, USA
** duncan@math.ukans.edu
*** bozenna@math.ukans.edu
A parameter identification problem is formulated and solved for a multidimensional parameter of a stochastic system where the parameter appears in the drift term of a stochastic differential equation that has the Brownian motion replaced by a fractional Brownian motion with the Hurst parameter in (0.5,1). These latter fractional Brownian motions seem to be useful models for many physical phenomena where Brownian motion is not appropriate. A different stochastic calculus is required for these processes because they are not semimartingales. A family of estimates is given that arises from a formal application of a least squares algorithm. The strong consistency of the family of estimates is verified.
Keywords: Parameter identification, Fractional Brownian motion, Linear stochastic systems, Estimation
Session slot T-Mo-M03: Mathematical Methods in Adaptive Control/Area code 3b : Adaptive Control and Tuning

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