Guaranteed parameter estimation in nonlinear dynamic systems using improved bounding techniques
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Accepted version
Author(s)
Paulen, R
Villanueva, M
Fikar, M
Chachuat, B
Type
Conference Paper
Abstract
This paper is concerned with guaranteed parameter estimation in nonlinear dynamic systems in a context of bounded measurement error. The problem consists of finding - or approximating as closely as possible - the set of all possible parameter values such that the predicted outputs match the corresponding measurements within prescribed error bounds. An exhaustive search procedure is applied, whereby the parameter set is successively partitioned into smaller boxes and exclusion tests are performed to eliminate some of these boxes, until a prespecified threshold on the approximation level is met. Exclusion tests rely on the ability to bound the solution set of the dynamic system for a given parameter subset and the tightness of these bounds is therefore paramount. Equally important is the time required to compute the bounds, thereby defining a trade-off. It is the objective of this paper to investigate this trade-off by comparing various bounding techniques based on interval arithmetic, Taylor model arithmetic and ellipsoidal calculus. When applied to a simple case study, ellipsoidal and Taylor model approaches are found to reduce the number of iterations significantly compared to interval analysis, yet the overall computational time is only reduced for tight approximation levels due to the computational overhead. © 2013 EUCA.
Date Issued
2013-12-01
Date Acceptance
2013-01-01
Citation
2013 European Control Conference, ECC 2013, 2013, pp.4514-4519
ISBN
9783033039629
Publisher
IEEE
Start Page
4514
End Page
4519
Journal / Book Title
2013 European Control Conference, ECC 2013
Copyright Statement
© 2013 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Grant Number
EP/J006572/1
Source
2013 European Control Conference (ECC)
Publication Status
Published
Start Date
2013-07-17
Finish Date
2013-07-19
Coverage Spatial
Zurich, Switzerland