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Reliability Investigation of NDE Systems by Modular Analysis of Recorded Data

  • During the second European-American Workshop on NDE Reliability, September 99 in Boulder, the term NDE reliability was defined as the degree that an NDT system is capable of achieving its purpose regarding detection, characterization and false calls. The most common – but also most expensive - way to determine this degree of capability in e.g. defect detection is to make just a performance demonstration using realistic test samples and to count the correct detections and false calls. For a more efficient way of reliability evaluation we propose to decompose the system into main modules e.g. according to the reliability formula set up on the first workshop: into f(IC) – a function of IC the intrinsic capability, determined by the physics and the technique of the NDE method representing an ideal upper bound of the reliability and g(AP) – a function of AP the industrial application factor like surface state or limited access to a component in general diminishing the ideal capability andDuring the second European-American Workshop on NDE Reliability, September 99 in Boulder, the term NDE reliability was defined as the degree that an NDT system is capable of achieving its purpose regarding detection, characterization and false calls. The most common – but also most expensive - way to determine this degree of capability in e.g. defect detection is to make just a performance demonstration using realistic test samples and to count the correct detections and false calls. For a more efficient way of reliability evaluation we propose to decompose the system into main modules e.g. according to the reliability formula set up on the first workshop: into f(IC) – a function of IC the intrinsic capability, determined by the physics and the technique of the NDE method representing an ideal upper bound of the reliability and g(AP) – a function of AP the industrial application factor like surface state or limited access to a component in general diminishing the ideal capability and finally h(HF) the function of the human factor which is in general also diminishing the ideal capability. The workshop proposed a rather plain mathematical shape for the formula R = f(IC) – g(AP) – h(HF) which should be considered merely as a “philosophical” expression but not as exact mathematical formula to be applied for evaluation of e.g. POD data. We propose to decompose the NDE system into modules in terms of functions of IC, AP and HF if appropriate or additional ones if necessary and then to analyze the mutual relationships of the terms via fault tree analysis. Finally the total reliability of the system is composed of the reliability of the subsystems via the rules of statistical systems theory. First trials for this approach of data analysis will be presented via examples from NDE systems in the aerospace industry.zeige mehrzeige weniger

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Metadaten
Autor*innen:Christina Müller, Mstislav Elagin, Martina Rosenthal, Bernhard Redmer, Uwe Ewert, Lloyd Schafer, P.-Th. Wilrich
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Proceedings of the 8th ECNDT
Jahr der Erstveröffentlichung:2002
Herausgeber (Institution):Asociación Española de Ensayos no Destructivos
Verlag:European Federation for Non-Destructive Testing
Verlagsort:Barcelona
Jahrgang/Band:8
Erste Seite:1(?)
Letzte Seite:14(?)
Veranstaltung:8th ECNDT
Veranstaltungsort:Barcelona, Spain
Beginndatum der Veranstaltung:2002-06-17
Enddatum der Veranstaltung:2002-06-21
URL:http://www.ndt.net/article/ecndt02/428/428.htm
Bemerkung:
Geburtsname von Rosenthal, Martina: Scharmach, M. -  Birth name of Rosenthal, Martina: Scharmach, M.
Verfügbarkeit des Dokuments:Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
Bibliotheksstandort:Sonderstandort: Publica-Schrank
Datum der Freischaltung:19.02.2016
Referierte Publikation:Nein
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