Adaptive Roll Stabilization of Fishing Vessels

Abstract

The application of frequency adaptive anti-roll tanks on fishing vessels is well established but currently restricted to U-tube designs. This paper concerns the initial stages of a research programme to develop a more generic anti-roll system that will be applicable to a range of tank geometries, with minimal alteration to the existing tank structure. Two possible control strategies, based on continuous and intermittent fluid flow, are assessed for a U-tube tank and the potential of extending the technique to a free-surface tank with a central partition is examined. The intermittent flow scheme was found to be most effective at longer roll periods while the continuous flow scheme was heavily reliant on a low value of fluid flow resistance.

A Fuzzy Ahp and Electre Method for Selecting Stabilizing Device in Ship Industry

“…Absolutely Strong (AS) (7,9,9) Very Strong (VS) (5,7,9) Fairly Strong (FS) (3,5,7) Slightly Strong (SS) (1,3,5) Equally ( Step 1. Build pairwise comparison matrices among all the criteria.…”

“…They used different method for stabilization. Jones et al [5] developed a more generic anti-roll tanks for fishing vessels. They suggested two control strategies for stabilizing.…”

“…The fuzzy geometric means The fuzzy weights C1 (2,15,3,45,5,41) (0,06, 0,18, 0,46) C2 (1,97,3,13,5,02) (0,06, 0,16, 0,42) C3 (1,1,1,76,3,39) (0,03, 0,09, 0,28) C4 (1,43, 2,41, 4, (1,43, 2,34, 3,72) (0,04, 0,12, 0,31) The ratings of stabilizer systems according to criteria are evaluated by five experts, who are working in ship sector as managers and instructors are presented in Table 8. Table 2 is used for conversion of evaluations into fuzzy numbers.…”

Active fin control for ship stabilization system using heuristic genetic optimization

“…29 To express the mathematical model of an active fincontrolled ship roll system, the rolling motion is assumed to be a single-degree-of-freedom second-order differential equation. In general, the equation of nonlinear roll motion of a ship under the influence of random wave or wind impact can be expressed as follows 4,13,[30][31][32][33] …”

Roll Motion Stabilizing System Selection Criteria for Ships and Hybrid Fuzzy Ahp-Topsis Application

“…Jones vd. [9] bir balıkçı teknesi için yeni kontrol yöntemlerini kullanarak daha kapsamlı bir tank sistemi önermişlerdir. Marzouk ve Nayfeh [10] pasif ve aktif tank sistemleri üzerine inceleme yapmış, dengeleyici sistem olarak aktif olanı öne çıkarmışlardır.…”