Rok 2023

• DYNAMIC POSITIONING CAPABILITY ASSESSMENT BASED ON OPTIMAL THRUST ALLOCATION

  Publikacja

  • A. Rymarczyk (dawniej: A. Piekło)
  • A. Witkowska
  • T. Zubowicz

  - Polish Maritime Research - Rok 2023

  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....

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• Identification of ship’s hull mathematical model with numerical methods

  Publikacja

  • A. Rymarczyk (dawniej: A. Piekło)
  • P. Hoffmann
  • A. Witkowska
  • T. Zubowicz

  - Rok 2023

  The modern maritime industry is moving toward the development of technology that will allow for full or partial autonomy of ship operation. This innovation places high demands on ship performance prediction techniques at the design stage. The researchwork presented in the article is related to the design stage of the ship and concerns methods for prognosis and evaluation of the specific operational condition of the ship, namely...

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Rok 2022

• Dynamic Positioning Capability Assessment for Ship Design Purposes

  Publikacja

  • A. Rymarczyk (dawniej: A. Piekło)
  • A. Witkowska
  • T. Zubowicz

  - Rok 2022

  The article focuses on solving a problem of optimal thrust distribution over the actuators in a ship Dynamic Positioning, according to DNV-ST-0111 standard, Level 1. The classic Quadratic Programming approach is combined with the numerical solusion used to handle the propeller with the rudder constraints in the optimization task and the influence between thrusters and skeg. It is presented as an efficient method of minimizing the...

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• Power efficient thrust allocation algorithms in design of dynamically positioned ships

  Publikacja

  • A. Rymarczyk (dawniej: A. Piekło)
  • A. Witkowska
  • T. Zubowicz

  - Rok 2022

  Assessment of power consumption on a Dynamically Positioned (DP) ship in the early design stage can assist crucial design choices. The study presents a comparison between two algorithms of optimal thrust allocation in a propulsion system for an over-actuated DP ship. Applied algorithms were Quadratic Programming (QP) and Non- dominated Sorting Genetic Algorithm II (NSGAII). Based on both approaches, tools were developed for ship...

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