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3 Polish Maritime Research

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Analysis of hazard to operator during design process of safe ship power plant

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Kowalewski T. , Podsiadlo A. , Tarelko W.

Polish Maritime Research

2010

tom 17

nr 4

This paper presents comparison of two methods for assessment of hazards to ship power plant operator, used in the preliminary stage of ship power plant design process: the matrix method and that based on fuzzy logic. And, it reports this way results of realization of the research projects [1, 2] financed by Polish Ministry of Science and Higher Education.The assessment of hazard to ship power plant operator, carried out at preliminary design stages meets certain difficulties resulting from that information connected with his safety are scarce or associated with high uncertainty. Therefore fuzzy logic was decided to be used to safety assesment. It was found out that at preliminary design stages application of the fuzzy-logic-based assessment yielded better results as compared with the classic matrix method

A mathod for determining the decision variables of hazardous zone identification system for ship power plant operator

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Kaminski P. , Podsiadlo A. , Tarelko W.

nr 3

n this paper a method is presented of determining – on the basis of information available in the preliminary phase of ship power plant design – the set of hazardous and noxious factors for the operator, as well as of converting them into the set of input variables to a hazardous zone identification system. Basing on the choice of values ofdetermined decision variables, the system’s user is able to determine potential hazardous zones for the ship power plant operator. Conversions of the determined factors into the set of the system’s input variables were performed by using the knowledge achieved from the side of experts in ship power plant designing and operating

Application of fuzzy inference to assessment of degree of hazard to ship power plant operator

100%

Kowalewski T. , Podsiadlo A. , Tarelko W.

nr 3

This paper presents application of fuzzy logic to assessment of degree of hazard to ship power plant operator. For the assessment a system of computer-aided identification of hazardous zone within ship power plant, was used. The system’s variables representing the subject-matter knowledge in safety design area were transformed into fuzzy sets by means of appropriate linguistic variables and membership functions. The assessing of safety level of operator with the use of fuzzy inference was performed by means of an expert system programmed in the PROLOG LPA language