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Insight into Frequency-Domain Extrapolations of Least-Squares-Based Curve Fitting Algorithms
- Source :
- IECON
- Publication Year :
- 2021
- Publisher :
- IEEE, 2021.
-
Abstract
- Many efforts have been made in order to identify state-space models of the black-box devices from their terminal admittance/impedance frequency responses. However, the band of the available admittance/impedance frequency responses is some-times relatively narrow, from which some out-of-band critical modes of interest can thus not be intuitively observed. In order to overcome this limitation, the vector fitting (VF) algorithm is used in this paper to identify some out-of-band critical modes of an artificially created rational function. On its basis, the sensitivity index which depicts the effect of the partial fraction term on the in-band fitting error is derived in order to explain the VF’s extrapolation behavior, and its effectiveness is verified on the cases where out-of-band modes of different numbers coexist.
- Subjects :
- vector fitting
Technology
Admittance
Science & Technology
EQUIVALENT
Extrapolation
extrapolation
Engineering, Electrical & Electronic
Rational function
Partial fraction decomposition
out-of-band modes
Least squares
sensitivity index
Automation & Control Systems
Engineering
Frequency domain
Engineering, Industrial
Curve fitting
Band-limited frequency responses
Sensitivity (control systems)
Algorithm
Mathematics
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- IECON
- Accession number :
- edsair.doi.dedup.....8357296885f3bd3c27c3cfb86e996770