Dynamic Positioning Capability Assessment Based on Optimal Thrust Allocation

IF 2 3区工程技术 Q2 ENGINEERING, MARINE

Polish Maritime Research Pub Date : 2023-06-01 DOI:10.2478/pomr-2023-0019

A. Piekło, A. Witkowska, T. Zubowicz

引用次数: 0

Abstract

Abstract The article presents an efficient method of optimal thrust allocation over the actuators in a dynamically positioned ship, according to the DNV-ST-0111 standard, Level 1. The optimisation task is approximated to a convex problem with linear constraints and mathematically formulated as quadratic programming. The case study is being used to illustrate the use of the proposed approach in assessing the DP capability of a rescue ship. The quadratic programming-based approach applied for dynamic positioning capability assessment allows for fast calculations to qualitatively compare different ship designs. In comparison with the DNV tool, it gives 100% successful validation for a ship with azimuth thrusters and a pessimistic solution for a ship equipped with propellers with rudders. Therefore, it can be safely applied at an early design stage.

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基于最优推力分配的动态定位能力评估

摘要根据DNV-ST-0111一级标准，提出了一种动态定位船舶各执行机构推力优化分配的有效方法。优化任务近似为具有线性约束的凸问题，在数学上表示为二次规划。案例研究被用来说明在评估救援船的DP能力时所提出的方法的使用。基于二次规划的动态定位能力评估方法可以快速计算并对不同船舶设计进行定性比较。与DNV工具相比，该工具对带有方位推进器的船舶进行了100%的成功验证，而对带有方向舵的螺旋桨船舶则给出了悲观的解决方案。因此，它可以安全地应用于早期设计阶段。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polish Maritime Research 工程技术-工程：海洋

CiteScore

3.70

自引率

45.00%

发文量

审稿时长

>12 weeks

期刊介绍： The scope of the journal covers selected issues related to all phases of product lifecycle and corresponding technologies for offshore floating and fixed structures and their components. All researchers are invited to submit their original papers for peer review and publications related to methods of the design; production and manufacturing; maintenance and operational processes of such technical items as: all types of vessels and their equipment, fixed and floating offshore units and their components, autonomous underwater vehicle (AUV) and remotely operated vehicle (ROV). We welcome submissions from these fields in the following technical topics: ship hydrodynamics: buoyancy and stability; ship resistance and propulsion, etc., structural integrity of ship and offshore unit structures: materials; welding; fatigue and fracture, etc., marine equipment: ship and offshore unit power plants: overboarding equipment; etc.