Wszystkie pola: propulsion systems - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Challenges of ship propulsion systems during DP operations
Autorzy:: Herdzik, I.
Powiązania:: https://bibliotekanauki.pl/articles/247849.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: propulsion system
challenge
dynamic positioning operation
safety of propulsion system
energy storage devices
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.
Źródło:: Journal of KONES; 2012, 19, 2; 211-217
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Prospective alternative propulsion systems for unmanned aerial vehicles
Autorzy:: Orkisz, M
Wołoszyn, T.
Wygonik, P
Powiązania:: https://bibliotekanauki.pl/articles/949507.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: alternative energy sources
hybrid-electric propulsion systems
fuel cells
solar cells
unmanned aerial
vehicles
Opis:: The paper presents selected issues concerning alternative power sources and propulsion systems meant for unmanned aerial vehicles (UAVs). The implementation of new propulsions in aviation is a laborious and long-term process, mostly due to safety and economical restrictions and requirements. Broadly, exploited solutions known from automotive industry may serve as a basis for development in aerospace technology, but cannot be applied without considering specific technical aspects (related to aircraft technology and flying objects physics). These aspects are mentioned in the text and some issues concerning suitability of types of aircraft are described. The paper presented contains a review of research on non-conventional propulsion systems for UAVs, conducted in Rzeszow University of Technology. Selected results of the research the fuel cell and the solar-cell UAVs and the aerial hybrid-electric drive test stand are shown in adequate pictures. The small-unmanned flying objects seem to be an accurate basis for such research. They allow reducing costs and improving safety in comparison to full-scale manned aircraft. They are also much quicker in manufacturing and easier to maintain and repair. Moreover, due to their various applications they may comprise the target market for this kind of propulsions. In particular, the issues of parallel hybrid-electric propulsions, fuel cell and solar-cell-assisted systems with appropriate examples are mentioned in the paper..
Źródło:: Journal of KONES; 2014, 21, 4; 369-374
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Resistance of idle propellers in marine multi-propeller propulsion systems
Autorzy:: Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/247530.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
high speed vessels
marine propellers
multi-propeller propulsion systems
Opis:: The configuration of a marine propulsion system is selected with regard to the maximum power resulting from its maximum design speed and displacement. The propulsion systems of high speed vessels use three or even four propellers, and each propulsion unit may be multi-engine. High speed vessels are designedfor maximum speeds, but their factual exploitation speed parameters are usually considerably lower - partial speed. In such cases particular propulsion propellers and engines need to be shut down. The idle propellers are dragged by the hull and they work in the so-called turbine work mode; they transfer torque to the shaft and generale negative thrust, i.e. additional resistance. Additional resistance contributes to reducing estimated speed of a vessel and increasing fuel consumption. What is more, torque generated on a propeller is transferred to the shaft and when friction resistance torque in shaft stuffing-boxes and bearings, transmission and, possibly, the propulsion engine is exceeded, mobile components rotate as a result, reaching considerable rotational speed values. torque and thrust on a propeller in this work mode may be estimated on the grounds of universal hydrodynamic characteristics of propellers. Universal hydrodynamic characteristics of propellers are used as reversion characteristics in evaluating the steering properties ofa vessel, and may be useful in evaluating resistance of free wheeling and locked propellers in marine multi-shaft propulsion systems. This paper presents charts of universal hydrodynamic characteristics of propellers for the full range of their rotational speed, the methodology and an example of calculating resistance of free wheeling and locked propellers for the given marine propulsion system.
Źródło:: Journal of KONES; 2010, 17, 4; 97-102
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Full-electric, hybrid and turbo-electric technologies for future aircraft propulsion systems
Autorzy:: Łukasik, B.
Wiśniowski, W.
Powiązania:: https://bibliotekanauki.pl/articles/243487.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: full electric
turbo-electric
hybrid systems
distributed propulsion systems
Opis:: Recently a huge progress in the field of electrical machines makes them more available for aviation. Assuming a big leap forward of electric technology in the near future, many research institutes around the World examine a revolutionary propulsion system which employs electrical machines. This idea can be a perfect response to a drastically growing air traffic and its demands about emission and fuel consumption reduction. There are already manufactured full electric, ultralight airplanes, which show that the technology is promising and future-proof. What is more it seems to be a key enabler for the development of the other technology that will influence the future of aircraft design and will allow introducing completely new airplane architectures. That is why Institute of Aviation in collaboration with The Ohio State University conducts investigation and analysis on feasibility of using such systems for aircraft propulsion. For this task a completely new tool based on Numerical Propulsion System Simulation (NPSS) environment is being developed. It will enable to analyse the electric devices conjugated with turbine engine as a whole propulsion system in the matter of its performance characteristics. The purpose of this paper is to present some of the most promising ideas and already accomplished analysis of different kinds of architectures. The analysis and optimization of the system, as well as cost effectiveness will be presented.
Źródło:: Journal of KONES; 2016, 23, 4; 305-310
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Monitoring system of extreme loadings of propulsion system’s foundation : design assumptions
Autorzy:: Kyzioł, L.
Murawski, L.
Powiązania:: https://bibliotekanauki.pl/articles/242588.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine structural health monitoring
propulsion system diagnostic
marine engines’ foundations
underwater explosion
ship grounding
optical time-domain reflectometer
Fibre Bragg Grating
Opis:: Project of on-line diagnostic (monitoring) system of marine propulsion system working parameters is the authors' general target. Proper propulsion system’s foundation is one of the most important parameters for its reliable operation. Different types of quasi-static loadings and dynamic excitations can be observed during ships exploitation. Presented research has been limited to extreme loadings. Underwater explosions or ship groundings are considered examples of extreme foundation loadings. Analysis of the physical parameters of the extreme forces has been presented in the first part of the paper. Water pressure spatial and non-spatial (time) distribution during underwater explosion has been analysed as an example. Short overview of the dynamic mathematical models of underwater explosions is presented. Time function of vibrations acceleration of ship construction is important design assumption of planned Structural Health Monitoring (SHM) system. Propulsion system's foundation loading measurements should take into account general ship hull deformation (in the aft part of the ship) as well as reactions changes of main engine and shaft line bearings. Ship hull deformation should be monitored as quasi-continuous measurements, along whole propulsion system. Optical Time-Domain Reflectometer method (OTDR) is planned for hull deformation monitoring. Propulsion system bearings' reactions are a source of local foundation pads' strain changes. Fibre Bragg Grating (FBG) sensors are the best for that kind of measurements, in authors opinion. Both techniques (OTDR and FBG) have been shortly described in the paper. Scheme of monitoring system of marine propulsion systems foundation's loadings are proposed in the end of the article.
Źródło:: Journal of KONES; 2013, 20, 1; 155-162
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Advanced batteries and supercapacitors for electric vehicle propulsion systems with kinetic energy recovery
Autorzy:: Juda, Z.
Powiązania:: https://bibliotekanauki.pl/articles/247243.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: lithium-titanate battery
regenerative braking
supercapacitor
electric vehicle
Opis:: For city and neighbourhood people transport, electric driven vehicle with advanced energy storage and electronic control system could be competitive for conventional transportation means. Advanced energy storage and full utilization of regenerative braking system leads to significant energy saving. Regenerative braking is particularly important in city traffic, where a lot of acceleration/braking cycles occur. Replacement of internal combustion engines driven cars with electric vehicles give various benefits: decrease of transport sector impact on climate warming by CO2 emission reduction and general human health condition increase by elimination of toxic exhaust gases components emission by passenger cars. Particular interest of EV research is focused on lithium based batteries and supercapacitors. Nano-Lithium-Titanate battery could be fully recharged in a very short time and current peaks have no damage impact on the battery. Such batteries have high Cycle Life value (25000) and long life calendar (20 years).Fast charging systems should be equipped with energy converter built inside charging station. The converter has to be based on intelligent control system, for charging parameters setting (stable voltage, charging current, charging time) for different electric vehicles. To estimating charge/discharge characteristic and regenerative braking effectiveness, a simulation in MATLAB environment has been performed based on factory parameters. Graphical simulations results are presented in the paper.
Źródło:: Journal of KONES; 2011, 18, 4; 165-171
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: The influence of shaft line alignment accuracy on the operational reliability of marine propulsion systems
Autorzy:: Murawski, L.
Powiązania:: https://bibliotekanauki.pl/articles/241911.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: shaft line alignment
marine propulsion systems
propulsion system's bearings damages
operating parameters of the power transmission system
Opis:: The paper presents a method of identification parameters of shaft line alignment and its influence on operational reliability of marine propulsion system. The discussion about shaft line parameters (bearings' reactions, bending moment and shear forces acting on crankshaft or gear box, and stresses distribution in the shaft line) which has an influence on marine propulsion system reliability was presented. Proper shaft line alignment is often a problem for repair shipyards, for aged ships without sufficient documentation. Some data can be draw by measurements; e.g. shaft line dimensions or intermediate bearings' reactions. Other data (stern tube bearing load, real axis of shaft line) have to be determined on the base of calculations. Author proposed combined experimental-analytical method for identified and optimization (correction) some existing parameters and checking power transmission system’s foundation. Specialised software (based on Finite Element Method) has been developed for shaft line alignment calculations. Main novelties of the software are elastic supports (model of bearings – boundary conditions) of the shaft line, continuous support as a model of stern tube bearing and influence coefficients calculations. An example analysis with discussion has been performed for cargo ships with medium-speed main engine. Multi-variant computations supported by measurements of the ships’ shaft line have been carried out. Changes in shaft line alignment have been proposed in order to increase reliability of propulsion system.
Źródło:: Journal of KONES; 2016, 23, 1; 247-254
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Influence of environmental, ergonomic factors and properties of operators on the reliability of ships propulsion systems
Autorzy:: Frąckowiak, W.
Powiązania:: https://bibliotekanauki.pl/articles/247900.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: propulsion system
operator
reliability
analysis
operator functions
Performance Shaping Factor
Opis:: Analyzing the systems in terms of reliability, we often treat them as the technical objects only, omitting human interaction or assuming that operator has constant characteristics. This significantly distorts the results obtained in this way, since human is a part of the system with special properties that can change together with the predisposition of the operator and the conditions under which he operates. These attributes may have a major influence on the reliability of the systems. Therefore, analysis of systems reliability should include a reliability of operator and its properties. In this paper presented the antropotechnical reliability structure based on selected installation, which is a part of ships propulsion system. Also operator’s functions were defined and the analysis of human reliability, taking into account various properties of the operator and the external conditions, were performed. Then, there is assessed the influence of operator and environmental factors on the value of the entire system reliability. The study used the reliability data of the container ship propulsion system equipped with low-speed piston engine, fixed pitch propeller and auxiliary installations. These data were obtained from studies of expert judgments (Brandowski A., Frąckowiak W. et al.) in the years 2007–2009. For HRA (human reliability analysis), HEART technique (Human Error Assessment and Reduction Technique) was used, together with the human unreliability values and correction factors developed by the authors of this method. Study results illustrate influence of environmental, ergonomic factors and the properties of the operator on the reliability of the antropotechnical systems. The studies were subjected exemplification on fuel treatment installation as a part of ships propulsion systems.
Źródło:: Journal of KONES; 2012, 19, 2; 145-151
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Application possibilities of electric driven propulsion of multi-mode ships
Autorzy:: Herdzik, J.
Powiązania:: https://bibliotekanauki.pl/articles/246217.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: ships propulsion
electric propulsion
multi-mode ships
propulsion systems
Opis:: The ship propulsion solution based on unconventional thrusters driven by electric motors is most often applied for the multi-mode ships. These ships ought to have dynamic positioning system. It forces an application of a few thrusters (most often four, seldom more up to eight). Records from a number of multi-mode ships show amean load of less than 40% of maximum load on the propulsion system. In other side the demand for electric energy of ship industrial part is large, more often than for the propulsion part. In that case the diesel-electric propulsion system application may be economical, because the electric energy generation for all ship's purposes makes possible the main engines work on the optimum loads on lowest specific fuel consumption and allows them a long-term work on heavy fuels. For multi-mode ships like cable ships, suppliers, drilling vessels are convenient an application of unconventional thrusters with direct electric propulsion as well, especially for dynamic positioning systems. The efficiency of the thrusters is a predominant factor for the successful and economical operation. Forecasted development and rise of quantity of diesel-electric propulsion (it means with electrical transmission) would cause increased interest of unconventional thrusters. Ultimately they may revolutionize ship propulsion systems.
Źródło:: Journal of KONES; 2010, 17, 1; 163-168
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Application possibilities of electric driven propulsion of multi-mode ships
Autorzy:: Herdzik, J.
Powiązania:: https://bibliotekanauki.pl/articles/247580.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: ships propulsion
electric propulsion
multi-mode ships
propulsion systems
Opis:: The ship propulsion solution based on unconventional thrusters driven by electric motor s is most often applied for the multi-mode ships. These ships ought to have dynamic positioning system. It forces an application of a few thrusters (most often four, seldom more up to eight). Records from a number of multi-mode ships show a mean load of less than 40% of maximum load on the propulsion system. In other side the demand for electric energy of ship industrial part is large, more often than for the propulsion part. In that case the diesel-electric propulsion system application may be economical, because the electric energy generation for all ship 's purposes makes possible the main engines work on the optimum loads on lowest specific fuel consumption and allows them a long-term work on heavy fuels. For multi-mode ships like cable ships, suppliers, drilling vessels are convenient an application of unconventional thrusters with direct electric propulsion as well, especially for dynamic positioning systems. The efficiency of the thrusters is a predominant factor for the successful and economical operation. Forecasted development and rise of quantity of diesel-electric propulsion (it means with electrical transmission) would cause increased interest of unconventional thrusters. Ultimately they may revolutionize ship propulsion systems.
Źródło:: Journal of KONES; 2010, 17, 4; 177-183
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Proposals and possibilities of unconventional thrusters applications for ship propulsion
Propozycje i możliwości zastosowan aktywnych pędników do napędu statków
Autorzy:: Herdzik, J.
Powiązania:: https://bibliotekanauki.pl/articles/245726.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: napęd statków
pędniki aktywne
układy napędowe
ships propulsion
unconventional thrusters
propulsion systems
Opis:: Unconventional thrusters have enhanced possibilities of direction oriented thrust generating, owing to the fact they are finding application as propulsion of chosen ships. On account on demand of navigational safety assuring (tugs, double-endedferńes, special ships, chosen cruise liners) or dynamic positioning (cable ships, suppliers, drilling vessels) the ship propulsion solution based on unconventional thrusters. That part of marine propulsion market was dominated by them. Unconventional thrusters allow possibilities of other applications like auxiliary propulsion (or emergency), bow or aft thrusters, antiheeling equipment. It is quested possibilities for other applications. By the way developing with aggressive promotion of that propulsion system advantages and presentation of theirs applications on still increasing quantity of ships, it is created an atmosphere that it is necessary tofollow this way that no return to association - modern and safe ship is a ship equipped as a minimum with auxiliary unconventional propulsion system. In a practice, ships equipped with this propulsion system, give a crew a enhanced comfort of work ditring manoeuvring and even from that reason they are pleasant seen by ship crew. It must be seen these thrusters have excellent future. The efficiency drop is about 6-8% in comparison with conventional propulsion system and increasing fuel consumption, but this is the only one disadvantage. Forecasted development and rise of diesel-electric propulsion systems quantity would cause increased interest of unconventional thrusters. Ultimately they may revolutionize ship propulsion systems.
Pędniki aktywne posiadają zwiększone możliwości wytwarzania ukierunkowanej siły naporu, dzięki temu znajdują zastosowanie do napędu wybranych jednostek morskich. Ze względu na wymagania zapewnienia bezpieczeństwa żeglugi (holowniki portowo-redowe, promy pasażerskie używane do przepraw, jednostki specjalistyczne, niektóre duże statki pasażerskie tzw. cruise liners) lub pozycjonowania jednostek (kablowce, suppliery, jednostki wiertnicze) zalecane jest rozwiązanie napędu głównego statku w oparciu o pędniki aktywne. Ta część rynku została przez nie zdominowana. Dają one również możliwości innych zastosowań np. jako napęd awaryjny (pomocniczy), stery strumieniowe, urządzenia przeciwprzechyłowe. Poszukuje się ich możliwości dalszych zastosowań. Przy okazji występując z agresywną reklamą zalet tej formy napędu oraz prezentacją ich zastosowań na coraz większej liczbie statków, wytwarza się atmosferę, że należy podążać tą drogą, że nie ma odwrotu od skojarzenia: nowoczesny i bezpieczny statek to statek wyposażony chociaż w pomocniczy napęd z użyciem pędników aktywnych. W praktyce, jednostki wyposażone w tą formę napędu dają zwiększony komfort pracy podczas manewrowania i z tego chociażby powodu są mile widziane przez załogi statków. Należy zauważyć, że są to pędniki mające przyszłość. Niedostatek sprawności w porównaniu z tradycyjnym napędem jest rzędu 6-8%, co powoduje odpowiednio zwiększone zużycie paliwa, ale jest to jedyna podstawowa wada. Przewidywany rozwój i wzrost liczebności napędów diesel-elektrycznych (z tzw. przekładnią elektryczną) spowoduje zwiększone zainteresowanie pędnikami aktywnymi. Docelowo mogą one zrewolucjonizować napędy statków.
Źródło:: Journal of KONES; 2009, 16, 4; 155-162
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: Problems of units selection of propulsion system for small unmanned tactical vehicle
Problemy doboru zespołów układu napędowego do małego taktycznego pojazdu bezzałogowego
Autorzy:: Polak, F.
Walentynowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/242792.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: pojazdy bezzałogowe
hybrydowe zespoły napędowe
dobór zespołów
unmanned vehicle
hybrid propulsion systems
unit's selection
Opis:: The battlefield was changed during many years and the weapon was developed also. Unmanned vehicles are one of the new kinds of weapon. They have different mass, executed tasks and the scope of autonomy. Their hybrid propulsion system increase traction proprieties of these vehicles considerably. The concept of the hybrid drive for the small unmanned vehicle was the main goal of the work. It was made assumptions, that the vehicle will have the mass approximately 1 ton, running on six wheels with the speed up to 60 km/h. The vehicle will have the combustion engine power 25 kW as the basic source of energy, Energy will be accumulated in batteries the mass 48kg and specific power 2667 W/kg. The single electric engine will propel six wheels of the vehicle. Four rare and front wheel will by steered. Units of propulsion system were selected with using the computer program ADVISER2004, and traction effort versus vehicle speed was determined on the base of the movement equations of the vehicle. The drive of the vehicle in unsteady condition was simulated using the program ADVISER2004 accord to the tests of ECE, FTP and 1015. It was affirmed that the vehicle with the chosen propulsion system could move with the speed more then 60 km/h on the asphalt roadway and below 50 km/h on the sandy road. It can to surmount the slopes 60%. Fuel consumption is circa 4 l/100 km in simulated drive test with the limitation of the maximum speed up to 60 km/h. The run range was circa 12 km as the electric vehicle.
Pole walki zmieniało się na przestrzeni wielu lat tak samo jak środki walki. Jednym z tych środków są pojazdy bezzałogowe. Różnią się one masą, wykonywanymi zadaniami oraz stopniem autonomii. Wyposażenie ich w hybrydowe układy napędowe znacznie zwiększa ich właściwości trakcyjne. Celem pracy było opracowanie koncepcji napędu hybrydowego do małego pojazdu bezzałogowego. Założono, że będzie to pojazd o masie ok. 1 tony, poruszający się na kołach z prędkością do 60km/h. Podstawowym źródłem napędu będzie silnika spalinowy o mocy 25 kW, a energia będzie gromadzona w akumulatorach o masie 48 kg i mocy właściwej 2667 kW/kg. Pojedynczy silnik elektryczny będzie napędzał sześć kół pojazdu za pomocą wałów napędowych, w tym cztery koła kierowane. Zespoły układu napędowego dobrano przy wykorzystaniu programu komputerowego ADVISER2004, a charakterystyki trakcyjne wyznaczono w oparciu o równania ruchu pojazdu. Za pomocą programu ADVISER2004 symulowano jazdę pojazdu w stanach nieustalonych zgodnie z testami ECE, FTP i 1015. Stwierdzono, że pojazd z dobranym układem może poruszać się z prędkością ponad 60 km/h pod drodze asfaltowej i poniżej 50km/h po drodze piaszczystej, pokonywać wzniesienia powyżej 60% przy zużyciu paliwa około 4 l/100 km podczas symulowanej jazdy wg uwzględnianych testów przy ograniczeniu maksymalnej prędkości do 60 km/h. Zasięg jazdy przy napędzie elektrycznym wynosił ok. 12km.
Źródło:: Journal of KONES; 2007, 14, 4; 343-350
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 13.

Tytuł:: Future weapon systems for all electric combat vehicles
Przyszłe uzbrojenie zelektryfikowanego wozu bojowego
Autorzy:: Walentynowicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/950088.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
wozy bojowe
hybrydowe układy napędowe
combat vehicles
hybrid propulsion systems
tracked vehicles
wheeled vehicles
Opis:: W referacie przedstawiono podstawowe problemy związane z zastosowaniem dział elektromagnetycznych w wozach bojowych przyszłości. Działa takie umożliwiają uzyskiwanie dużo większej prędkości wylotowej pocisków w porównaniu z klasycznymi działami prochowymi przy mniejszej ilości materiału energetycznego (paliwa, prochu). Dlatego stosowane mogą być pociski o mniejszej masie. Można załadować także większą liczbę pocisków na pokład pojazdu. Mniejszy jest także ślad cieplny pojazdu podczas strzału. Jednak zastosowanie dział magnetycznych wymaga rozwiązania jeszcze wielu problemów technologicznych związanych z wytwarzaniem impulsów energii elektrycznej o dużej mocy, trwałości, dokładności oraz niezawodności luf, przepływu energii wewnątrz pojazdu oraz oddziaływania pola magnetycznego na ludzi i sprzęt wewnątrz i na zewnątrz pojazdu. Działa elektromagnetyczne są przewidywane jako główne uzbrojenie przyszłościowe wozów bojowych. Działa elektromagnetyczne będą stanowiły bardzo ważny element przyszłego, w pełni zelektryfikowanego pojazdu bojowego, znanego jako "All Electric Combat Vehicle". Problemy do rozwiązania, to zwiększenia mocy wytwarzanej energii, przesyłania energii, trwałości i stabilności parametrów luf oraz doskonalenia konstrukcji pocisków. Należy sądzić, że istotne zalety tych dział spowodują, że będą one mogły stać się podstawowym uzbrojeniem wozów bojowych przyszłości.
Basic problems connected with using of electromagnetic cannons in the future fighting vehicles were introduced in the report. Such cannons make possible getting a lot of larger escape speed of bullets in the comparison with classic powder cannons using smaller quantity of the energetic material (fuel, powder). That is why applied can be bullets about the smaller mass. It is possible to load larger number of such bullets on the vehicle board also. The thermal signature of the vehicle is smaller during the shot also. However application electromagnetic guns requires still solution many technological problems connected with production of the impulses of electric energy about large power, achievement high level of durability, exactitude and the reliability of barrels, the flow of energy vehicle and the influence of the magnetic field on the staff and equipment inside and outside the vehicle. Electromagnetic guns are anticipated as main future armament of combatant vehicles. They will be all-important element of future, entirely electrified vehicle, known as "All Electric Combat Vehicle". Challenges soluble are enhancement of the power of produced energy, transmission of energy, durability and the stability of parameters of barrels and improvements of missile design. Essential advantages of these guns will cause that they will be able to become the basic armament of future combat vehicles.
Źródło:: Journal of KONES; 2007, 14, 1; 357-364
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 14.

Tytuł:: Statistical evaluation of propriety of measurements of ship’s movement parameters
Autorzy:: Charchalis, A.
Polanowski, S.
Powiązania:: https://bibliotekanauki.pl/articles/244984.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: diagnostics
vessel’s propulsion systems
ship propulsion characteristics for ships with fixed propeller modelling
determination of power characteristics
Opis:: The paper presents some problems of carrying out measurements of energetic characteristics and vessel’s performance in the conditions of sea examinations. As the object of propulsion characteristic determination was selected the ship with fixed pitch propeller. In order to formulate models of power characteristics, in first, known physical aspect were taken and subsequently statistic theory was implemented. Models of propulsion performance were built basing on two theoretical methods of determination of required shaft power and torque at a hub, as the function of propeller’s revolutionary speed and sailing condition represented by dimensionless coefficients. Model number one, based on Silukov method presents function with variable power index, of shaft power in domain of revolutionary speed. The second one presents model of torque variations, based on Silovic – Fancev method. For verification of models were taken presented in available bibliography, results of researches of ship’s propulsion systems [6]. We also discuss the manner of reducing the results of measurements to the standard conditions. We present the way of preparing propulsion characteristics and the analysis of examination uncertainty for the measurement of torque. Statistical analysis of deviation of results, using three models, proposed in the paper. As a result of analysis, one point from primary data set was rejected due to its unreliability, what was resulting with higher adequacy of characteristics.
Źródło:: Journal of KONES; 2016, 23, 1; 83-89
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 15.

Tytuł:: The development of specialized ships propulsion systems with the aim of improving their manoeuvring ability in the aspect of navigation safety
Rozwój układów napędowych specjalistycznych statków w celu podniesienia ich zdolności manewrowych w aspekcie bezpieczeństwa żeglugi
Autorzy:: Herdzik, J.
Powiązania:: https://bibliotekanauki.pl/articles/243414.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: statek specjalistyczny
układ napędowy
pędnik
zdolności manewrowe
bezpieczeństwo żeglugi
specialized ship
ship propulsion system
thruster
manoeuvring ability
navigation safety
Opis:: The paper presents the development of specialized ship's propulsion system during last twenty years. It was shown some applied solutions of propulsion systems and what aims were achieved: improving of manoeuvring ability, the achievement ofpropulsion system's high efficiency in very large range from the idling to full load and the increasing of navigation safety. Ship propulsion systems are more often applied, especially for ships which operate on the sea in special ways and need: ship positioning, very high manoeuvring abilities, other ships services, self manoeuvring even for cruise ships. These propulsion systems are not needed applying the steering gears. These functions: steering and propulsion do thrusters, which in these cases are built in twin systems. It ensures possibilities of ship's propulsion (motion) keeping, even in case of failure in one propulsion system. For reason of sea traffic increasing, especially on sea area, when this traffic needs co-ordination (VTS stations), ship equipped in modern propulsion system should ensure greater navigation safety for herself and should decrease collision risk for other ships situated on this sea area. The usage high-performance and efficiency active powerplants is a key for the enlargement of the safety of sea shipping.
W artykule przedstawiono rozwój układów napędowych specjalistycznych statków w okresie ostatnich dwudziestu lat. Podano stosowane rozwiązania oraz jakie cele udało się osiągnąć: zwiększenie zdolności manewrowych jednostek, uzyskanie wysokiej sprawności układów napędowych w szerokim zakresie obciążeń od biegu jałowego do obciążenia nominalnego oraz podniesienie bezpieczeństwa żeglugi. Układy napędowe z nowoczesnymi pędnikami są coraz powszechniej stosowane, szczególnie dla statków, które uprawiają nietypowążeglugę i wymagają: pozycjonowania jednostki, wysokich zdolności manewrowych, obsługi innych statków, samodzielnego manewrowania nawet w przypadku dużych statków pasażerskich. Układy te nie wymagają stosowania tradycyjnych maszyn sterowych. Funkcje sterowania i napędu jednostki spełniają pędniki, które z tego powodu budowane są minimum w układach podwójnych. W związku ze zwiększaniem się ruchu morskiego, szczególnie na akwenach, na których ruch ten wymaga koordynacji (stacji kierowania ruchem), statek posiadający nowoczesny układ napędowy będzie w stanie zapewnić bezpiecznążeglugę dla siebie i zmniejszyć zagrożenie kolizyjne w stosunku do wszystkich jednostek znajdujących się na danym akwenie. Stosowanie wysokosprawnych pędników aktywnych jest kluczem do zwiększenia bezpieczeństwa żeglugi.
Źródło:: Journal of KONES; 2007, 14, 3; 211-218
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "propulsion systems" wg kryterium: Wszystkie pola

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język