Przetwarzanie sygnałów w diagnostyce stanu narzędzia i procesu skrawania

• Autorzy: Jemielniak K.
• Języki publikacji: PL

Abstrakty

PL

W artykule przedstawiono współczesne metody przetwarzania sygnałów w układach diagnostyki stanu narzędzia i procesu skrawania (DNiPS). Omówiono przetwarzanie wstępne (np. filtrowanie, wzmacnianie, zamianę na postać cyfrową, segmentację), a następnie wyznaczenie miar sygnałów w dziedzinie czasu, częstotliwości (transformata Fouriera) lub czasu i częstotliwości (krótkookresowa transformata Fouriera, transformata falkowa, transformata Hilberta-Huanga). Uzyskanych miar sygnałów może być bardzo wiele, zwłaszcza jeśli pochodzą od różnych sygnałów (czujników), a wiele z nich nie jest związanych z monitorowanym procesem. Stąd konieczne są odpowiednie sposoby oceny stopnia ich powiązania z monitorowanym zjawiskiem. Omówiono metody oceny przydatności i selekcji miar oraz eliminacji tych miar, które dublują informacje z miar lepszych od siebie.

EN

Paper presents state of the contemporary methods of signal processing in tool and process condition monitoring systems (T/PCM). First the signal pre-processing (filtering, amplification, A/D conversion, segmentation) was described. Then there have been discussed the extraction of signal features in time domain, frequency domain (Fourier transform) or time-frequency domain (Short Time Fourier Transform, Wavelet Transform, Hilbert-Huang Transform). There are many diverse descriptors especially from different sensor signals, however many of them are not correlated with monitored process. Thus, feature relevancy evaluation is of critical importance. Methods of signal feature usability evaluation, selection and elimination of these which are doubling information contained in better ones were also presented.

Słowa kluczowe

PL

diagnostyka stanu narzędzia; diagnostyka procesu skrawania; przetwarzanie sygnałów

EN

tool and process condition monitoring; signal processing

• Wydawca: Wydawnictwo Politechniki Poznańskiej
• Czasopismo: Archiwum Technologii Maszyn i Automatyzacji
• Rocznik: 2011
• Tom: Vol. 31, nr 2
• Strony: 37--49
• Opis fizyczny: Bibliogr. 34 poz.

Twórcy

autor

Jemielniak K.

• Instytut Technik Wytwarzania Politechniki Warszawskiej

Bibliografia

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