Improving the Quality of Magnetic Signature Reproduction by Increasing Flexibility of Multi-Dipole Model Structure and Enriching Measurement Information
| Autor: | Tomasz A. Rutkowski, Jaroslaw Tarnawski, Adam Cichocki, Mirosław Wołoszyn, K. Buszman |
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| Rok vydání: | 2020 |
| Předmět: |
General Computer Science
Computer science Magnetometer 02 engineering and technology magnetic fields 01 natural sciences Dipole model law.invention Quality (physics) Marine vehicles Position (vector) law curve fitting 0103 physical sciences 0202 electrical engineering electronic engineering information engineering General Materials Science 010302 applied physics Magnetic moment electromagnetic modelling 020208 electrical & electronic engineering General Engineering Ellipsoid model checking Dipole Noise Ferromagnetism lcsh:Electrical engineering. Electronics. Nuclear engineering computational electromagnetics lcsh:TK1-9971 Algorithm |
| Zdroj: | IEEE Access, Vol 8, Pp 190448-190462 (2020) |
| ISSN: | 2169-3536 |
| DOI: | 10.1109/access.2020.3031740 |
| Popis: | The paper presents the construction of a multi-dipole model that allows reproducing magnetic signatures of ferromagnetic objects. The virtual object used in the paper is an ellipsoid, which is the source of synthetic data. To make the situation more realistic, noise is added to the synthetic data. Two significant improvements compared to previous work are presented. Three-axial magnetometers are introduced instead of uniaxial magnetometers. However, a more important change is the modification of the model structure that allows placing dipoles on the entire plane, e.g. object's deck. The multi-dipole model consists of an a priori assumed number of permanent and induced single-dipole models. Each single dipole is described by three magnetic moments and, depending on the applied approach, one or two dipole position parameters. The non-linear least-squares optimization method is used to determine model parameters. To assess the quality of magnetic signature reproduction, qualitative and quantitative forms are used. The final quality assessment is based on differences between the reference fields and the fields determined from the multi-dipole model. The applied modifications bring significant improvement, however, only their combined application allows to restore magnetic signatures with good quality for directions other than for which the data were available. |
| Databáze: | OpenAIRE |
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