• 한국기계기술학회지
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• 제13권2호
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• pp.9-19
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• 2011

Most real world design evaluation and risk-based decision support combine quantitative and qualitative (linguistic) variables. Decision making based on conventional mathematics that combines qualitative and quantitative concepts always exhibit difficulty in modelling actual problems. The successful selection process for choosing a design/procurement proposal is based on a high degree of technical integrity, safety levels and low costs in construction, corrective measures, maintenance, operation, inspection and preventive measures. In this paper, a design decision support framework using a composite structure methodology grounded in approximate reasoning approach and evidential reasoning method is suggested for design evaluation of machinery space of a ship engine room at the initial stages. An illustrative example is used to demonstrate the application of the proposed framework.

• 한국가스학회지
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• 제10권3호
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• pp.1-6
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• 2006

본 연구는 석탄을 가스화한 저발열량 합성가스 연료의 가스엔진과 소형가스발전기로의 적용가능성을 보여준다. 석탄을 가스화한 저발열량 합성가스를 가스엔진의 연료로 사용하기 위해 상용 LPG엔진을 부분적으로 변경하였다. 석탄가스화 연료에 적합한 연료공급시스템 -공기유량조절 오리피스, 가스믹서, 기화기, 예열히터, 레귤레이터, 연료탱크-이 집중적으로 변경되었다. 엔진 운전 결과에서 비록 석탄가스화 연료의 엔진 출력이 LPG연료에 비해 다소 떨어지지만 석탄가스화 연료를 사용하는 엔진이 공회전 조건에서부터 교축밸브를 완전 개방한 전부하조건까지 잘 운전됨을 보여주었다. 또한 본 연구에서 개발된 가스엔진발전기는 다양한 부하에서도 잘 작동됨을 보여주었다.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2006년 창립20주년기념 정기학술대회 및 국제워크샵
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• pp.277-280
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• 2006

Most real world design evaluation and risk-based decision support combine quantitative and qualitative (linguistic) variables. Decision-making based on conventional mathematics that combines qualitative and quantitative concepts always exhibit difficulty in modelling actual problems. The successful selection process for choosing a design/procurement proposal is based on a high degree of technical integrity, safety levels and low costs in construction, corrective measures, maintenance, operation, inspection and preventive measures. However, the objectives of maximising the degree of technical performance, maximising the safety levels and minimising the costs incurred are usually in conflict, and the evaluation of the technical performance, safety and costs is always associated with uncertainties, especially for a novel system at the initial concept design stage. In this paper, a design-decision support framework using a composite structure methodology grounded in approximate reasoning approach and evidential reasoning method is suggested for design evaluation of machinery space of a ship engine room at the initial stages. It is a Multiple Attribute Decision-Making (MADM) or Multiple Criteria Decision Making (MCDM) framework, which provides a juxtaposition of cost, safety and technical performance of a system during evaluation to assist decision makers in selecting the winning design/procurement proposal that best satisfies the requirement in hand. An illustrative example is used to demonstrate the application of the proposed framework.