Abstract
In this paper the existence of a polynomial approximation of input-output maps for distributed systems is proved. The result is achieved for a class of mappings uniformly continuous with respect to a suitable topology on bounded sets of input space. The causality structure is preserved in the approximating polynomial. As an example of the theory, the distributed linear perturbed system is considered.
Similar content being viewed by others
References
A. V. Balakrishnan.Applied Functional Analysis, Springer-Verlag, New York (1976).
A. Bertuzzi, A. Gandolfi and A. Germani. A Weierstrass-like theorem for real separable Hilbert spaces, Rept. 79–40 Istituto di Automatica-CSSCCA, Rome, December 1979;J. Approximation Th., to appear.
R. W. Brockett. Volterra series and geometric control theory,Automatica 12, 167–176 (1976).
C. Bruni, G. Di Pillo and G. Koch. On the mathematical models of bilinear systems,Ricerche di Automatica 2, 11–26 (1971).
P. G. Gallman and K. S. Narendra. Representation of nonlinear systems via the Stone-Weierstrass theorem,Automatica 12, 619–622 (1976).
A. Germani and P. Sen. White noise solutions for a class of distributed feedback systems with multiplicative noise,Ricerche di Automatica 10, 38–65, 1979 (also Rept. 79–28 Istituto di Automatica-CSSCCA, Rome, July 1979).
E. G. Gilbert. Volterra series and the response of nonlinear differential systems,Trans. Conf. on Inf. Sci. and Systems, Johns Hopkins University, March 1976.
J. L. Kelley.General Topology, Springer-Verlag, New York (1955).
C. Lesiak and A. J. Krener. The existence and uniqueness of Volterra Series for nonlinear systems,IEEE Trans. AC 23, 1090–1095 (1978).
L. A. Lusternik and V. J. Sobolev.Elements of Functional Analysis, Hindustan Publishing Corpn. Delhi (1974).
G. Palm and T. Poggio. The Volterra representation and the Wiener expansion: validity and pitfalls,SIAM J. Appl. Math. 33, 195–216 (1977).
W. A. Porter, T. M. Clark and R. M. DeSantis. Causality structure and the Weierstrass theorem,J. Math. Anal. Appl. 52, 351–363 (1975).
W. A. Porter. The common causality structure of multilinear maps and their multipower forms,J. Math. Anal. Appl. 57, 667–675 (1977).
W. A. Porter. Approximation by Bernstein Systems,Math. Systems Theory 11, 259–274 (1978).
R. Saeks.Resolution Space, Operators and Systems, Lecture Notes, Springer-Verlag, New York (1973).
V. V. Sazonov. A remark on characteristic functionals,Teor. Veroj. i Prim. 3, 201–205 (1958).
V. Volterra.Theory of Functionals and of Integral and Integro-Differential Equations, Dover, New York (1930).
N. Wiener.Nonlinear Problems in Random Theory, John Wiley, New York (1958).
Author information
Authors and Affiliations
Additional information
This work was supported by CNR (National Research Council).
Rights and permissions
About this article
Cite this article
Bertuzzi, A., Gandolfi, A. & Germani, A. Causal polynomial approximation for input-output maps on Hilbert spaces. Math. Systems Theory 14, 339–352 (1981). https://doi.org/10.1007/BF01752405
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01752405