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Block assembly planning in shipbuilding using case-based reasoning
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DOI：10.1016/j.eswa.2005.11.013.png)
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Abstract
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A process planning system using case-based reasoning (CBR) is developed for block assembly in shipbuilding. A block assembly planning problem is modeled as a constraint satisfaction problem where the precedence relations between operations are considered constraints. In order to find similar cases, we propose two similarity coefficients for finding similar cases and for finding similar relations. Due to the limited number of operation types, the process planning system first matches the parts of the problem and those of the case-based on their roles in the assembly, and then it matches the relations related to the matched part-pairs. The parts involved in more operations are considered first. The process planning system is applied to simple examples for verification and comparison. An interface system is also developed for extracting information from CAD model, for preparing data for process planning, and for visually verifying the assembly sequence. (C) 2005 Elsevier Ltd. All rights reserved.
Keywords:
block assembly
process plan
case-based reasoning
similarity coefficient
constraint satisfaction problem
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