PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników
Powiadomienia systemowe
  • Sesja wygasła!

Znaleziono wyników: 6

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  sailing vessels
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available Evolutionary multi–objective weather routing of sailboats
Sobecka Ewa, Szłapczyński Rafał, Życzkowski Marcin
Polish Maritime Research
|
2020
|
nr 3
130--139
EN
The paper presents a multi-objective method, which optimises the route of a sailboat. The presented method makes use of an evolutionary multi-objective (EMO) algorithm, which performs the optimisation according to three objective functions: total passage time, a sum of all course alterations made during the voyage and the average angle of heel. The last two of the objective functions reflect the navigator’s and passenger’s comfort, which may decrease with multiple turns or when experiencing an excessive heel angle for a long time. The optimisation process takes into account static bathymetry-related constraints as well as dynamic constraints related to the sailboat’s safety in changing wind and wave conditions. The method makes use of all of the above and finally returns an approximated Pareto set containing non-dominated solutions to the optimisation problem. The developed method has been implemented as a simulation application. The paper includes selected simulation results followed by their discussion.
2
Content available Multi-objective weather routing of sailboats considering wave resistance
Życzkowski M., Krata P., Szłapczyński R.
Polish Maritime Research
|
2018
|
nr 1
4--12
EN
The article presents a method to determine the route of a sailing vessel with the aid of deterministic algorithms. The method assumes that the area in which the route is to be determined is limited and the basic input data comprise the wind vector and the speed characteristic of the vessel. Compared to previous works of the authors, the present article additionally takes into account the effect of sea waves with the resultant resistance increase on the vessel speed. This approach brings the proposed model closer to real behaviour of a sailing vessel. The result returned by the method is the sailing route, optimised based on the multi-criteria objective function. Along with the time criterion, this function also takes into account comfort of voyage and the number of performed turns. The developed method has been implemented as simulation application SaillingAssistance and experimentally verified.
3
Content available Sailing vessel routing considering safety zone and penalty time for altering course
Życzkowski M.
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
|
2017
|
Vol. 11, no. 2
235--240
EN
In this paper we introduce new model for simulation sea vessel routing. Besides a vessel types (polar diagram) and weather forecast, travel security and the number of maneuvers are considered. Based on these data both the minimal travelling costs and the minimal processing time are found for different vessels and different routes. To test our model the applications SailingAssistance wad improved. The obtained results shows that we can obtain quite acceptable results.
4
Content available Multi-objective weather routing of sailing vessels
Życzkowski M., Szłapczyński R.
Polish Maritime Research
|
2017
|
nr 4
10--17
EN
The paper presents a multi-objective deterministic method of weather routing for sailing vessels. Depending on a particular purpose of sailboat weather routing, the presented method makes it possible to customize the criteria and constraints so as to fit a particular user’s needs. Apart from a typical shortest time criterion, safety and comfort can also be taken into account. Additionally, the method supports dynamic weather data: in its present version short-term, mid-term and long-term term weather forecasts are used during optimization process. In the paper the multi-objective optimization problem is first defined and analysed. Following this, the proposed method solving this problem is described in detail. The method has been implemented as an online SailAssistance application. Some representative examples solutions are presented, emphasizing the effects of applying different criteria or different values of customized parameters.
5
Content available remote Mikrosieć okrętowa dla jednostek z napędem żaglowym
Gwóźdź M., Krystkowiak M., Gulczyński A.
Przegląd Elektrotechniczny
|
2014
|
R. 90, nr 12
56--58
PL
W artykule przedstawiono koncepcję mikrosieci okrętowej DC-AC dla jednostek żaglowych integrującej kilka lokalnych generatorów energii, na które składają się: generator zespolony z napędem pomocniczym jednostki, generatory napędzane turbinami wodną i wiatrową oraz współpracujący z panelem fotowoltaicznym. Zakłada się, że projektowane rozwiązanie systemu zasilania charakteryzować się będzie wysokim stopniem automatyzacji oraz znaczną niezawodnością pracy. Autorzy rozpatrują również możliwość zastosowania w charakterze napędu pomocniczego jednostki wolnobieżnego silnika elektrycznego PMSM napędzającego pędniki (śruby okrętowe) pracujące w układzie przeciwbieżnym. W artykule przedstawiono strukturę sieci oraz scharakteryzowano niektóre rozwiązania szczegółowe zastosowane dla jej realizacji.
EN
The article presents the concept of a ship DC-AC microgrid designed for sailing units and integrating several local power generators in the form of: a generator combined with auxiliary drive of the ship, generators powered by wind and water turbines and a generator using photovoltaic panel. The proposed solution is characterized by a high degree of automation of operations and significant reliability of work. The authors also examine the possibility of using as an auxiliary drive unit low-speed PMSM driving thrusters (screw propellers) working in an opposite mode. The paper presents the structure of network and characterizes some of specific solutions used for its implementation.
6
Content available remote Effect of Aqua Kem Green chemicals on technological effectiveness of gasification of plant biomass
Dębowski M., Zieliński M., Kluk A., Chomański Ł.
Environment Protection Engineering
|
2011
|
Vol. 37, nr 3
129-136
EN
Development of sailing tourism is contributes to degradation of the natural environment, waters of lakes and rivers in particular. Wastewaters produced on sailboats and yachts and deposited in their chemical toilets are usually discharged directly to aquifers, with a minor part being discharged to collectors for these are located in a few ports only. Thus, it seems indispensable to develop a complex system of collection and neutralization of such wastewaters. It is, however, a difficult process for it requires solving both logistic and technological problems. One of the technological problems may involve adopting an optimum method for neutralization of the wastewaters that usually contain chemical agents for the removal of unpleasant odours, e.g. Aqua Kem Green type. A solution to this problem may be co-gasification of wastewaters from sailboats with plant biomass in the fermentation process in a biogas works.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.