Temat: dynamic positioning system

Skocz do pozycji: 1.

Tytuł:: Dynamic positioning system design for “Blue Lady”. Simulation tests
Autorzy:: Tomera, M.
Tematy:: dynamic positioning system
marine systems
ship control; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/259096.pdf Link otwiera się w nowym oknie
Opis:: The dynamical positioning system is a complex control consisting of a number of components, including: filters, observers, controllers, and propeller allocation systems. The design and preliminary analysis of operational quality of system operation are usually done based on numerical simulations performed with the aid of the mathematical model of the ship. The article presents a concept of the dynamic positioning system applied to steering the training ship Blue Lady used for training captains in the ship handling research and training centre owned by the Foundation for Safety of Navigation and Environment Protection in Ilawa/Kamionka. The simulation tests performed in the numerical environment of Matlab/Simulink have proved the usability of the designed system for steering a ship at low speed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Dynamic positioning system for a ship on harbour manoeuvringwith different observers. Experimental results
Autorzy:: Tomera, M.
Tematy:: Dynamic positioning system
Manoeuvring control
Observers
Real-time experiments; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/260483.pdf Link otwiera się w nowym oknie
Opis:: In cases when the navigational space of the manoeuvre performed by the ship is severely limited, the procedures making use of the rudder blade, propeller screw, and thrusters are very complicated. Such situations take place when the ship manoeuvres inside the harbour area and in those cases the structure of the control system is very complex. The article describes the algorithm of multivariable control of ship motion over the water surface, which makes use of the state vector consisting of 6 variables. Three of them, which are the position coordinates (x, y) measured by the DGPS system and the ship heading y measured by gyro-compass, were obtained experimentally. The three remaining variables, which are the velocities in surge u, sway v, and yaw r directions, were estimated by Kalman filter, Kalman- Bucy filter and extended Kalman filter, respectively. The control algorithms making use of these observers were examined using the training ship „Blue Lady” which was navigated on the lake Silm in Ilawa/Kamionka in the Ship Handling Research and Training Centre owned by the Foundation for Safety of Navigation and Environment Protection. The experimental results obtained using control systems with three observers were finally compared between each other.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Fractional Order Dynamic Positioning Controller
Autorzy:: Witkowska, A.
Tematy:: Marine Controllers
Dynamic Positioning Controller
Dynamic Positioning (DP)
PID Controller
Ship Control System
fractional order
Dynamic Positioning System
DP Vessel; Pokaż więcej
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Powiązania:: https://bibliotekanauki.pl/articles/117405.pdf Link otwiera się w nowym oknie
Opis:: Improving the performance of Dynamic Positioning System in such applications as station keeping, position mooring and slow speed references tracking requires improving the position and heading control precision. These goals can be achieved through the improvement of the ship control system. Fractional-order calculus is a very useful tool which extends classical, integer-order calculus and is used in contemporary modeling and control applications. Fractional-order PI?D? controller, based on the added flexibility of fractional-order operators, are capable of superior performance compared to their integer-order counterparts. This paper presents the fractional order PI?D? controller designed to maintain the ship position and heading and the results were compared with classical integer order PID controller.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Safety of Navigation During Dynamic Positioning on Mobile Water Transport Objects
Autorzy:: Gabruk, R.
Tsymbal, M.
Tematy:: Dynamic Positioning (DP)
Mobile Water Transport Objects (MWTO)
Safety of Navigation
Dynamic Positioning System (DPS)
Dynamic Positioning Safety
Environmental Factors (EF)
Failure Modes and Effects Analyses (FMEA); Pokaż więcej
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Powiązania:: https://bibliotekanauki.pl/articles/116228.pdf Link otwiera się w nowym oknie
Opis:: This paper presents an innovation methodology for quantity assessment the safety of dynamic positioning in locally confined area of technological work performance under nonlinear dynamic disturbances of environmental factors. The methodology is based on new integrated paradigm of prediction coordinated components interactions, which form dynamic positioning system. Proposed methodology implementation effect is based on the analysis of complex models that form the knowledge base. The comprehensive reserve of controllable thruster’s reactions was adopted as quantitative characteristic of dynamic positioning safety.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Position reference systems for off shore vessels
Autorzy:: Pawelski, J.
Tematy:: dynamic positioning
offshore
positioning system
data transfer
dynamiczne pozycjonowanie
system pozycjonowania
transfer danych; Pokaż więcej
Wydawca:: Polskie Stowarzyszenie Telematyki Transportu
Powiązania:: https://bibliotekanauki.pl/articles/393745.pdf Link otwiera się w nowym oknie
Opis:: Dynamic positioning (DP) system is an automatic system allowing vessel to keep position or move along predetermined track using solely own propellers and thrusters. Position reference systems provide very accurate position of vessel in relation to chosen points which is the key element of DP operations. Systems made by diff erent manufactures they have to use standardized data exchange protocols for proper communication.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Analysis of impact of ship model parameters on changes of control quality index in ship dynamic positioning system
Autorzy:: Rynkiewicz, Tacjana Niksa
Witkowska, Anna
Tematy:: backstepping
ship dynamic positioning
system’s susceptibility; Pokaż więcej
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:: https://bibliotekanauki.pl/articles/259774.pdf Link otwiera się w nowym oknie
Opis:: In this work there is presented an analysis of impact of ship model parameters on changes of control quality index in a ship dynamic positioning system designed with the use of a backstepping adaptive controller. Assessment of the impact of ship model parameters was performed on the basis of Pareto-Lorentz curves and ABC method in order to determine sets of the parameters which have either crucial, moderate or low impact on objective function. Simulation investigations were carried out with taking into account integral control quality indices.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Possibilities of improving safety and reliability of ship propulsion system during dp operations
Autorzy:: Herdzik, I.
Tematy:: propulsion system
dynamic positioning operation
reliability
safety
propulsion system solutions; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/247846.pdf Link otwiera się w nowym oknie
Opis:: Improving safety and reliability of ship propulsion system during dynamic positioning (DP) operations of multipurpose vessels is an essential advantage. It may be such possibilities obtained by application the considered solutions of propulsion systems and all other elements of energetic system. The minimum requirements were determined by creating the regulations of dynamic positioning systems and their levels. Applying the solutions, which were exceeded the limits of basic requirements, allows to increase the safety and reliability levels with a low rise the investment costs. Many marine companies try to invent so low cost solutions. An example analysed in the paper is the Wartsila LCC system. The applications of more complicated solutions in comparison to required duplicated systems are expensive. The cheaper solution is an investing in the development of automatics configurations (for those systems it was applied the triple and quadruple configurations) which in transient or emergency conditions may obtain the time delay making possible a support of industry part work and DP systems. In emergency situation, after the loss of position by DP system, the power management system allow the safe break of work the industry part and return to work after elimination the critical condition.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Challenges of ship propulsion systems during DP operations
Autorzy:: Herdzik, I.
Tematy:: propulsion system
challenge
dynamic positioning operation
safety of propulsion system
energy storage devices; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/247849.pdf Link otwiera się w nowym oknie
Opis:: Ship propulsion configurations with dynamic positioning systems are commonly used as diesel-electric. In particular, situations for ship transfer on longer distances may be used conventional mechanical propulsion system with controllable pitch propeller. Combination of mechanical and electric propulsion system called hybrid propulsion is met as well, where the thrusters of DP systems are driven through the gear by mechanical engine or electric motor independent or both. For the sake of the necessity of limitation of total installed power on the ship may occurred problems with power distribution between the ship propulsion and industry part. It will especially concern those situations when we need to keep power supply to the industry part and there is a necessity to increase the power delivered to ship propulsion part for the purpose of keeping the ship position or heading. The primary task of power management system (PMS) is blackout prevention in ship energetic network and so power distribution to overcome critical conditions of it. Temporarily it may occur the worsening of positioning operation accuracy without any critical situations of industry part. The possibility of momentary overloading of energetic network is primary condition of safety. The critical duration of overloading is one minute. This is indispensable time for increasing the accessible power in the energetic system through switching on the next genset to work. It is a necessity of quick analysis in critical conditions to value what key-actions ought to do in the aim of overcoming emergency situations. The next one is a usage of energy storage devices. It is possible through AC/DC conversion. It was tried to find solutions of equalization the load of gensets to the ship electric energy demand.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: SLAM – Based Approach to Dynamic Ship Positioning
Autorzy:: Wróbel, K. A.
Tematy:: Dynamic Ship Positioning
Simultaneous Localization and Mapping (SLAM)
Dynamic Positioning (DP)
Reference System
SLAM Method
SLAM Post-Processing
Doppler Velocity Log (DVL)
Hydroacoustics; Pokaż więcej
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Powiązania:: https://bibliotekanauki.pl/articles/116689.pdf Link otwiera się w nowym oknie
Opis:: Dynamically positioned vessels, used by offshore industry, use not only satellite navigation but also different positioning systems, often referred to as ‘reference’ systems. Most of them use multiple technical devices located outside the vessel which creates some problems with their accessibility and performance. In this paper, a basic concept of reference system independent from any external device is presented, basing on hydroacoustics and Simultaneous Localization and Mapping (SLAM) method. Theoretical analysis of its operability is also performed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Problemy rozdziału wektora sterującego między pędniki w systemach dynamicznego pozycjonowania statków
Problems of steering vector allocation to thrusters in ships dynamic positioning systems
Autorzy:: Herdzik, J.
Tematy:: napęd statku
pędniki okrętowe
dynamiczne pozycjonowanie statków
dokładność pozycjonowania
propulsion system
ship propellers
dynamic positioning ships systems
positioning accuracy; Pokaż więcej
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Powiązania:: https://bibliotekanauki.pl/articles/312055.pdf Link otwiera się w nowym oknie
Opis:: W referacie przedstawiono problemy rozdziału wektora sterującego między dostępne pędniki układu napędowego i pozycjonowania przy spełnieniu określonych ograniczeń. Konieczne jest spełnienie warunku minimalnej sumarycznej mocy wymaganej z pędników, co pozwala na uzyskanie minimum zużycia paliwa. Analiza komplikuje się ze zwiększeniem liczby pędników w układzie pozycjonowania, ich rozmieszczeniem oraz dostępnością. Odpowiednie oprogramowanie systemów sterowania umożliwia uzyskanie wymaganej dokładności pozycjonowania lub utrzymania kursu, co jest warunkiem podstawowym na statkach specjalistycznych z systemami dynamicznego pozycjonowania klasy 2 i 3.
Paper discussed the problems of steering vector allocation to thrusters in ship's dynamic positioning systems to the demanded quality of station keeping taking into account the required limitations. The main challenge is minimum of delivered power that allows to get the minimum of total fuel consumption. The analysis is complicated due to increasing the number of thrusters, their allocation and accessibility. The software of dynamic positioning systems ought to allow the keeping of required position or heading what is a basic condition for DPS class 2 and 3.
Dostawca treści:: Biblioteka Nauki

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