Abstract
This work extends the applicability of variable structure observers designed for nonlinear systems in two ways. First, it is proved that these observers using a boundary-layer scheme can be applied to system models described by Ito differential equations, resulting in almost sure and mean square exponential estimation error. Second, the use of variable structure observers is extended to nonlinear measurement models containing disturbance effects. Also, a novel approach for obtaining the required parameters in the observer design is provided. Finally, two examples are given to illustrate the application and favorable convergence properties of these generalizations.
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References
D. Bestle and M. Zeitz, “Canonical form observer design for nonlinear time-variable systems,”Int. J. Control, vol. 38, pp. 419–431, 1983.
A. Isidori,Nonlinear Control Systems: An Introduction. Springer-Verlag: Berlin, 1985.
A.J. Krever and W. Respondek, “Nonlinear observer with linearizable error dynamics,”SIAM J. Control Optim., vol. 23, pp. 197–216, 1985.
B.L. Walcott and S.H. Zak, “State observation of nonlinear uncertain dynamical systems,”IEEE Trans. Autom. Contr., vol. 32, pp. 166–170, 1987.
B.L. Walcott, M.J. Corless, and S.H. Zak, “Comparative study of non-linear state-observation technique,”Int. J. Control, vol. 45, pp. 2109–2132, 1987.
W. Baumann and R. Rugh, “Feedback control of non-linear systems by extended linearization,”IEEE Trans. Autom. Contr., vol. 31, pp. 40–47, 1986.
F.E. Thau, “Observing the state of non-linear dynamic systems,”Int. J. Control, vol. 18, pp. 471–479, 1973.
S.R. Kou, D.L. Elliot, and T.J. Tarn, “Exponential observer for nonlinear dynamic systems,”Inform. Control, vol. 29, pp. 204–216, 1975.
M. Vidyasagar, “On the stabilization of nonlinear systems using state detection,”IEEE Trans. Autom. Control, vol. 25, pp. 504–509, 1980.
E. Yaz, “Design of observers for non-linear time-varying systems,”Int. J. Syst. Sci., vol. 19, pp. 583–587, 1988.
T.W. Martin and E. Yaz, “Generalization of a disturbance minimization scheme,” inProc. 8th ACC, Atlanta, GA, 1989, pp. 2580–2585.
E. Yaz and A. Azemi, “Lyapunov-based nonlinear observer design for stochastic systems,” inProc. 29th IEEE Conference on Decision and Control, Honolulu, HI, vol. 1, pp. 218–219, 1990.
E.A. Misawa and J.K. Hedrick, “Nonlinear observers—a state-of-the-art survey,”J. Dynam. Syst. Meas. Cont., vol. 111, pp. 344–352, 1989.
T.C. Gard,Introduction to Stochastic Differential Equations. Marcel Dekker: New York, 1988.
M. Zakai, “On the ultimate boundedness of moments associated with solution of stochastic differential equations,”SIAM J. Control, vol. 5, pp. 588–593, 1967.
A. Ben Israel and T.N.E., Greville,Generalized Inverse Theory and Applications. New York: Wiley, 1974.
A. Ohara and T. Kitamori, “Geometric structures of stable state feedback systems,” inProc. 29th IEEE Conference on Decision and Control, Honolulu, HI, vol. 3, pp. 2494–2499, 1900.
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Yaz, E., Azemi, A. Sliding mode observers for nonlinear models with unbounded noise and measurement uncertainties. Dynamics and Control 3, 217–235 (1993). https://doi.org/10.1007/BF01972697
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DOI: https://doi.org/10.1007/BF01972697