Enhanced feature extraction algorithms using oscillatory-mode pulsed Eddy Current techniques for aircraft structure inspection

• Autorzy: Lysenko Iuliia , Kuts Yurii , Protasov Anatoliy , Redka Mykhailo , Uchanin Valentin

Identyfikatory

DOI

10.2478/tar-2021-0013

Warianty tytułu

PL

Wykorzystanie techniki impulsowych prądów wirowych (PEC) w trybie oscylacyjnym do ulepszenia algorytmów do wyodrębnienia cech w kontroli struktury samolotu

• Języki publikacji: EN

Abstrakty

EN

A review of the existing literature shows that modern pulsed eddy current (PEC) technique for flaw detection in aircraft structure inspection is typically carried out in aperiodic mode. At the same time, the unstable characteristic points of the EC signal usually used as informative parameters can restrict the potential of this excitation mode due to significant measurement errors. This article considers an advanced PEC method of NDT based on the oscillatory mode. To obtain the conditions concerned with different modes of EC probe response oscillations, an equivalent scheme of the "testing object - EC probe" system was developed and analyzed. The frequency and attenuation coefficient of natural oscillations are proposed as the informative parameters of the probe signals. The obtained mathematical model of the probe signals allows for the dependence of proposed signal parameters on the characteristics of the testing object to be evaluated. Herein, we first develop algorithmic software for determining and analyzing the discrete amplitude and phase characteristics of PEC NDT signals based on the simulation results. The errors of the natural frequency oscillations and the attenuation coefficient determination as well as the optimal time for its determination are analyzed in order to minimize the possible errors. Next, the proposed informative parameters are experimentally investigated using a set of specimens. The obtained results confirm the possibility of the proposed methodology to enhance the inspection procedures related to the electrical conductivity and geometric parameters measurements as well as the detected defect sizing.

PL

Przegląd istniejącej literatury wskazuje, że nowoczesna technika impulsowych prądów wirowych (PEC) do wykrywania wad w inspekcji konstrukcji lotniczych jest zwykle prowadzona w trybie aperiodycznym. Przy tym, niestabilne punkty charakterystyczne w sygnale prądów wirowych, które zwykle są używane jako parametry informacyjne, mogą ograniczać potencjał tego trybu wzbudzenia ze względu na znaczne błędy pomiarowe. W niniejszym artykule rozważano zaawansowaną metodę PEC dla badań nieniszczących (NDT) opartą na trybie oscylacyjnym. W celu uzyskania warunków związanych z różnymi trybami oscylacji odpowiedzi sondy prądów wirowych, opracowano i przeanalizowano równoważny schemat układu „obiekt badany - sonda”. Jako parametry informacyjne dla sygnałów brano częstotliwość i współczynnik tłumienia drgań własnych.Tak powstały model matematyczny sygnałów pozwala na ocenęzależności proponowanych parametrów sygnałów od właściwości obiektu badanego. Najpierw na podstawie wyników symulacji opracowano algorytmiczne oprogramowanie do wyznaczania i analizy dyskretnych charakterystyk amplitudowych i fazowych sygnałów PEC NDT. Analizowano błędy wyznaczania częstotliwości drgań własnych oraz współczynnika tłumienia, a także optymalny czas jego wyznaczania w celu minimalizacji możliwych błędów. Następnie, zaproponowane parametry informacyjne badano eksperymentalnie z wykorzystaniem zestawu próbek. Otrzymane wyniki potwierdzają możliwość zastosowania proponowanej metody do usprawnienia procedur inspekcyjnych związanych z pomiarami przewodności elektrycznej, parametrów geometrycznych oraz oceny rozmiarów wykrywanych defektów.

Słowa kluczowe

EN

pulsed eddy current; natural oscillation frequency; attenuation; amplitude signal characteristics; phase signal characteristics

PL

impulsowy prąd wirowy; częstotliwość drgania naturalnego; osłabienie; amplituda sygnału fazowego; właściwości sygnału fazowego

• Wydawca: Wydawnictwa Naukowe Sieci Badawczej Łukasiewicz - Instytutu Lotnictwa
• Czasopismo: Transactions on Aerospace Research
• Rocznik: 2021
• Tom: Nr 3 (264)
• Strony: 1--16
• Opis fizyczny: Bibliogr. 34 poz., fot., rys., wzory

Twórcy

autor

Lysenko Iuliia

• Department of Non-Destructive Testing Instruments and Systems, Faculty of Instrumentation Engineering, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", 37, Prosp. Peremohy, Kyiv, Ukraine, 03056

• https://orcid.org/0000-0001-9110-6684

autor

Kuts Yurii

• Department of Non-Destructive Testing Instruments and Systems, Faculty of Instrumentation Engineering, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", 37, Prosp. Peremohy, Kyiv, Ukraine, 03056

• https://orcid.org/0000-0002-8493-9474

autor

Protasov Anatoliy

• Department of Non-Destructive Testing Instruments and Systems, Faculty of Instrumentation Engineering, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", 37, Prosp. Peremohy, Kyiv, Ukraine, 03056

• https://orcid.org/0000-0002-2965-3334

autor

Redka Mykhailo

• Department of Non-Destructive Testing Instruments and Systems, Faculty of Instrumentation Engineering, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", 37, Prosp. Peremohy, Kyiv, Ukraine, 03056

• https://orcid.org/0000-0002-0374-2208

autor

Uchanin Valentin

• Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, 5, Naukova St., Lviv, Ukraine, 79060

• https://orcid.org/0000-0001-9664-2101

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).