Reprezentacja wiedzy w komputerowo wspomaganym systemie identyfikacji obszaru zagrożenia dla operatora w siłowni okrętowej.

• Autorzy: Podsiadło A. , Tarełko W.

Warianty tytułu

EN

Knowledge representation in computer-aided system for hazard zone identification for operators of ship power plants.

• Języki publikacji: PL

Abstrakty

PL

W artykule przedstawiono metodę rozwiązania decyzyjnego problemu identyfikacji elementów obszaru zagrożenia dla operatora w siłowni okrętowej z wykorzystaniem tzw. modelu bazowego nazywanego reprezentacją wiedzy. W tym celu sformułowano problem decyzyjny, zaprezentowano algorytm jego rozwiązania oraz uczestników procesu rozwiązania problemu (ekspert, projektant systemu, komputer) i ich zadania. Do budowy modelu bazowego wykorzystano dwa sposoby reprezentacji wiedzy o procesie identyfikacji elementów obszaru zagrożenia: reprezentację logiczną w postaci relacyjnej bazy wiedzy oraz reprezentację strukturalną w postaci grafów.

EN

Ship power plants have to accomplish requirements of future users, i.e. a machinery crew. As a rule, these requirements are formulated in the form of a set of ship power plant properties that are realized at various stages of the product life-cycle. These properties of ship power plants are 'built-in' at the development stage of a design process. In order to achieve the desired levels of the selected properties, designers should take into account many various design principles. One of the general design principles is 'design for safety'. It means that the ship power plant has to meet requirements of the safety. One of the possible solutions for increasing the operator's safety is to build a computer-aided system supporting design process of safe ship power plants. Such a system is being developed in Gdynia Maritime University. This paper deals with the computer-aided system for hazard zone identification in ship power plants. In every procedure involving identification actions, we could observe that one of the typical multiple recurrent activities is an act of deciding. It is obvious that such an activity should be preceded by appropriate actions preparing this decision. For enabling an appropriate course of these actions, we should constitute an appropriate framework, for example in the form of a decisions-making system. In our approach, all decision-making problems are solved by means of a base model called knowledge representation. The base model uses the following ways of knowledge representation concerning the process of hazard zone identification: - logical representation in the form of the relative knowledge base, - structural representation in the form of the graphs. Both kinds of the mentioned knowledge are stored in the knowledge base of the computer-aided system for hazard zone identification in ship power plants. Realization of a decision-making process for hazard zone identification requires the development of an appropriate procedure. This procedure is realized in such a way that a system user, using the knowledge base and taking the internal and external restrictions into account, determines its stages by attributing the special comparative values worked out. In this way, the user makes a decision concerning the degree of hazard for operators within the identified hazard zone. Thus, this decision-making procedure consists of carrying out the selection of dangerous or harmful factors and their values (input variable values), which could trigger off any consequences for operators (output variable values). Based on these determined values, the system should calculate a value of an index expressing influence of dangerous and harmful factors on hazards for operators. In depend on the received value, the system proposes a proper strategy of safety design for the selected hazard situation element, for instance: - withdrawing operators to more safe places by means of replacing a machinery component together with operations to be involved, - decreasing hazards for operators by selecting suitable design features of machinery components which can reduce influence of dangerous and harmful factors, - remaining the considered design solution without any changes. An algorithm of generating solution for the hazard zone identification task in a ship power plant completes the description of the knowledge representation in computer-aided system for hazard zone identification for operators of ship power plants.

Słowa kluczowe

PL

siłownia okrętowa; operator; obszar zagrożenia; model decyzyjny; system wspomagany komputerowo; reprezentacja wiedzy; baza wiedzy

EN

ship power plants; operator; hazard zone; decision-making system; computer-aided system; knowledge representation; knowledge base

• Wydawca: Komitet Budowy Maszyn PAN
• Czasopismo: Zagadnienia Eksploatacji Maszyn
• Rocznik: 2007
• Tom: Vol. 42, nr 1
• Strony: 157--171
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Podsiadło A.

autor

Tarełko W.

• Akademia Morska w Gdyni, Katedra Podstaw Techniki, ul. Morska 81-87, 81-225 Gdynia, tel. [phone], fax [phone],

Bibliografia

• [1] Podsiadło A., Tarełko W.: Modelling and developing a decision-making process of hazard zone identification in ship power plants. International Journal of Pressure Vessels and Piping. 2006. No. 83. pp.287-298.
• [2] Podsiadło A., Tarełko W.: Modelling a decision-making process of hazard zone identification in ship power plants. Proceedings of European Safety & Reliability Conference (ESREL 2005). Advances in Safety and Reliability. A.A. Balkema Publishers. 27-30 June 2005. Gdansk. Vol. 2, pp. 1585-1592.
• [3] Bubnicki Z.: Wstęp do systemów eksperckich. PWN. Warszawa 1990.
• [4] Suh N.P.: The Principles of Design. Oxford University Press. Oxford 1990.