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http://dx.doi.org/10.7837/kosomes.2013.19.5.552

An Algorithm for Optimized Accuracy Calculation of Hull Block Assembly  

Noh, Jac-Kyou (Department of Naval Architecture, Kunsan National University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.19, no.5, 2013 , pp. 552-560 More about this Journal
Abstract
In this paper, an optimization algorithm for the block assembly accuracy control assessment is proposed with consideration for the current block assembly process and accuracy control procedure used in the shipbuilding site. The objective function of the proposed algorithm consists of root mean square error of the distances between design and measured data of the other control points with respect to a specific point of the whole control points. The control points are divided into two groups: points on the control line and the other points. The grouped data are used as criteria for determining the combination of 6 degrees of freedom in the registration process when constituting constraints and calculating objective function. The optimization algorithm is developed by using combination of the sampling method and the point to point relation based modified ICP algorithm which has an allowable error check procedure that makes sure that error between design and measured point is under allowable error. According to the results from the application of the proposed algorithm with the design and measured data of two blocks data which are verified and validated by an expert in the shipbuilding site, it implies that the choice of whole control points as target points for the accuracy calculation shows better results than that of the control points on the control line as target points for the accuracy of the calculation and the best optimized result can be acquired from the accuracy calculation with a fixed point on the control line as the reference point of the registration.
Keywords
Ship Block; Block Assembly; Accuracy Calculation; Control Line; ICP(Iterative Closest Point);
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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