Autor: (Z). - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Model of vehicle electric drive system
Autorzy:: Pawelski, Z.
Zdziennicki, Z.
Powiązania:: https://bibliotekanauki.pl/articles/245296.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
electric vehicle
energy storage
electric drive
driving cycle
battery model
Opis:: Models of electrical energy storage devices – a battery and a supercapacitor – as well as models of motor and a control system, were used to feature the work of a hybrid electric drive system. The models were adapted to simulate driving with a given driving cycle, in a quasi-static method, with the use of MATLAB-Simulink software. The advantage of this method is that calculations can be done quickly and results can be easily compared. A battery model enables determining voltage and charge level in relation to load current and temperature. The basic parameter of a battery is a nominal capacity. It is a measure of energy stored in the battery, which can be absorbed within discharge time, in conditions of temperature and current. The energy can be absorbed until the minimal voltage is reached in the clips. The article presents simulation of calculations lead that the described electric drive model. The model makes it possible to analyse different concepts of steering the whole system already in the initial phase. In particular, the article presents PMSM model and trajectories of selected parameters during a trapezoidal driving cycle.
Źródło:: Journal of KONES; 2017, 24, 3; 211-220
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Problemy pozyskania i transportu drewna w Bieszczadach
Problema vedenija lesnogo khozjajjstva v Beshhadakh
The problems of logging and transport of wood in Bieszczady
Autorzy:: Patalas, Z.
Powiązania:: https://bibliotekanauki.pl/articles/824479.pdf
Data publikacji:: 1971
Wydawca:: Polskie Towarzystwo Leśne
Tematy:: lesnictwo
Bieszczady
lasy
pozyskiwanie drewna
drewno
zrywka drewna
transport
srodki transportu
koszty
Źródło:: Sylwan; 1971, 115, 04
0039-7660
Pojawia się w:: Sylwan
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Znajdowanie najkrótszej drogi z wykorzystaniem algorytmów mrówkowych
The Shortest Route Search with Ant Algorithms
Autorzy:: Świątnicki, Z.
Powiązania:: https://bibliotekanauki.pl/articles/312339.pdf
Data publikacji:: 2018
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: optymalizacja długości drogi
algorytm mrówkowy
heurystyka
logistyka
transport
road length optimization
ant algorithm
heuristics
logistics
Opis:: Praca poświęcona jest problemowi znajdowania najkrótszej drogi w grafie poszukiwań. Zastosowano do tego celu algorytmy mrówkowe. Zbudowano model optymalizacyjny. Wybrano 8 różnych algorytmów mrówkowych. Przedstawiono i omówiono uzyskane wyniki optymalizacji długości drogi.
The presented research results indicate the usefulness of ant algorithms in the optimization of the road length. Admittedly, ant algorithms do not guarantee an optimal solution, but they provide a suboptimal (rational) solution. In a situation where we have limited time to solve the optimization problem, the guarantee of terminating the algorithm and obtaining a rational, acceptable solution is an attractive alternative for conducting long-term calculations and finding a little better solution.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2018, 19, 12; 998-1001
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Struktura przedsiębiorstw logistycznych
Structure of logistics enterprises
Autorzy:: Jedynak, Z.
Powiązania:: https://bibliotekanauki.pl/articles/322012.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: logistyka
usługa
transport
magazyn
zapas
logistic
service
warehouse
stock
Opis:: Celami artykułu są identyfikacja, budowa i opracowanie klasyfikacji krajowych przedsiębiorstw logistycznych, która uwzględnia zarówno ich strukturę organizacyjno-techniczną, jak i uwarunkowania branży. Zastosowana metoda badawcza to przegląd krajowej literatury przedmiotu oraz obserwacja `bezpośrednia. Realizacja przyjętego celu i tematu referatu obejmuje następujące etapy: klasyfikacja usług logistycznych, charakterystyka przedsiębiorstw logistycznych w ujęciu czynnościowym, opracowanie założeń i zasad klasyfikacji przedsiębiorstw logistycznych w ujęciu systemowym.
The aim of the paper is to identify, design and develop of the classification national logistics enterprises, which takes into account both their technical and organizational structure as well as the conditions of the industry. The research method used is a review of the national literature and direct observation. The realization of the aim and theme of the paper includes the following steps: classification of logistics services; characteristics of the logistics enterprises in terms of functional; development objectives and principles of the classification of the logistics enterprises in terms of system.
Źródło:: Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2015, 82; 89-99
1641-3466
Pojawia się w:: Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: FEM temperature evaluation of model braking test in comparison to selected laboratory test
Autorzy:: Skorupka, Z.
Powiązania:: https://bibliotekanauki.pl/articles/247287.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
air transport
simulation
friction materials
model braking
Opis:: Friction pair tests or model brake tests are one of the trials done in order to evaluate friction pair materials usefulness in full-scale brakes. Such tests are both time consuming and expensive, so most of the manufacturers want to reduce them as much as possible by using numerical simulations for both time and costs savings. It is not possible to eliminate laboratory tests entirely because of the safety regulations requirements. Without regulatory compliance, no brake material can be used in consumer products such as cars or airplanes. Nowadays most of the FEM programs are capable of simulate braking (friction) process in many of its aspects. Accuracy of calculations varies according to complexity of the model and phenomena taken into account. One of the interesting aspects of braking is the friction temperature generation especially due to its destructive impact on the vehicle brakes. Laboratory evaluation of the temperature can be performed in limited spectrum because of inaccessibility of the friction area. FEM calculations can help to determine temperature changes and temperature value during process. It also helps to determine temperature induced damaging conditions for the friction material or the whole brake design. In this paper author compares FEM of friction temperature calculations and laboratory test performed in Landing Gear Laboratory of Institute of Aviation in Warsaw where author works on daily basis. FEM simulation was created in order to resemble mentioned friction material test and to create model of the geometry of the tested material including test stand parts. All of the calculations were performed using COMSOL MULTIPHISICS software.
Źródło:: Journal of KONES; 2015, 22, 3; 213-219
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Technical and legal determinants of energy conversion in electric vehicle equipped with energy recovery system
Autorzy:: Juda, Z.
Powiązania:: https://bibliotekanauki.pl/articles/247926.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
regenerative braking
energy conversion
Opis:: Regenerative braking in electric or hybrid driven vehicles is now commonly used feature. Development of technologies of electrical machines, secondary energy sources, power electronics and control systems allows for more efficient using of this attribute. Regenerative braking system converts the kinetic energy of moving vehicles on this form of energy that you can store in a secondary source of energy. The most common form of energy after conversion is electricity, easy to store in batteries or supercapacitors. There also are known systems with storage of mechanical energy (high-speed flywheels with composite rotors). Drive systems with optional regenerative braking should take into account a number of aspects influencing the process. It is very important to maintain the stability of the vehicle movement during braking. Another important aspect is the cooperation of regenerative braking system with conventional, mechanical brake system of the vehicle driven by a single axis. Sizing of the electrical machine (or machines) is associated with the needs of the propulsion of the vehicle, which limits the amount of absorbed energy in the initial stage of braking. Individual elements of the system energy conversion efficiency chain complexity affect the energetic results of this process. On the energy, efficiency of the process of braking energy recovery affects string conversion efficiency in the individual components of the system. Regenerative braking is the important factor, which could improve electric vehicle market chances, particularly in the city or neighbourhood personal transport. The article contains a description of the technical and legal circumstances of the process of regenerative braking and energy aspects of this process.
Źródło:: Journal of KONES; 2016, 23, 4; 193-199
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The influence of jet links' parameters on the stress loading of tractor's power train sites
Autorzy:: Godzhaev, Z.
Powiązania:: https://bibliotekanauki.pl/articles/244090.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
caterpillar transport
power train
dynamic stress loading
mathematical model
results of researches
Opis:: In the article are described the results of calculation researches of influence of ruggedness of fastening to aframe in cross-section and longitudinal planes of case parts of a power chain of a caterpillar, and also ruggedness of communication with aframe in the same planes of a combustion engine on dynamic stress loading of sites of a power train during movement with different speeds. Except the specified ruggedness of fastening, this dynamic loading depends on parameters of shifting jerks which take place in a power shafting owing to non-uniformity of action of the basic operational loadings - oscillations oftraction resistance, cross-section and axial vibrations of a framework of a tractor on a suspender, rewinds of a Caterpillar chain, non-uniformity of rotation of a shaft of the engine. Researches have shown that at the expense of steering of ruggedness of fastening to an engine bed and case parts of transmission it is possible to essentially lower dynamic stress loading of separate sites of transmission in movement modes when details of these sites are loaded as much as possible. The circuit solution is offered for realization in a fastening design to a frame of the case of transmission of caterpillars of VT family which will allow to lower stress loading of transmission details on certain speeds of movement.
Źródło:: Journal of KONES; 2009, 16, 1; 145-156
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Total current measurement interrupts detection method in automotive bulbs circuits
Autorzy:: Sobczyk, Z.
Powiązania:: https://bibliotekanauki.pl/articles/244445.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
automotive lights
bulbs
network failures
interruptions identification method
Opis:: Identification of interruption in automotive bulbs circuits by total current measurement method seems very attractive. This method allows on application the least length and weight wires in automotive electric network. These savings have special meaning in mass production. Due to less connections number increases reliability, too. Basing on electrical schematic general diagram has been described total current measurement interrupts detection method in automotive bulbs circuits. It has been pointed at sensibility on supply voltage value changes range of this method. It has been described bulbs’ main properties. As an analysis example has been chosen the most exacting from the possibilities of total current measurement method indicator lamp circuit. Besides supply voltage change, there are not equal load resistances in this circuit. This causes different bulbs' electric current values. It has been computed failure detector’s electric current values at minimal and maximal voltage in vehicle network. It has been analyzed proper working circuit likewise interruptions in bulbs' 21 [W] and 5 [W] circuits. It has been found that at accepted establishments correct and univocal interruption detection in 21 [W] bulbs is possible in full range of changes supply voltage. Detection of interruption in 5 [W] bulbs is possible only in part of range of changes supply voltage.
Źródło:: Journal of KONES; 2011, 18, 1; 579-584
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Dependability of machine system - usable characteristics
Autorzy:: Smalko, Z.
Powiązania:: https://bibliotekanauki.pl/articles/950093.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: dependability
machine system
transport
Opis:: The subject of this paper deals with dependability of machine systems base on selected usable characteristics. In the subsystem man-machine and environment, determined tasks are carried out. The sequence of activity is following: man handles machine, which in turn makes the environment deliver desired reaction, e.g. processing or transportation. A machine and desired reaction of environment will recognize the positive effect of above activities as carrying out of set task. It is also of utmost importance that the man and machine's impact on environment is efficient and harmless. Therefore the selection of an adequate machine and its operator to carry out the given task is crucial. The circumstances considered as undesired for task implementation are identified as hazard to man and machine. Within the endangered man - machine and environment subsystem, we can distinguish following phases in the machine degradation process: worthy, partially worthy, partially unworthy, critically unworthy and totally unworthy. The selection of adequate means towards achieving set goals is considered important, and, subsequently, the description of selected machine and human (as operator and decision maker) attributes has been undertaken. The basic attributes of man and machine complex are: adequacy, dependability, safety, durability and effectiveness. Adequacy, described as common machine property, turns out to be a collection of four attributes: functionality, configurability, coverage, and programmability. Reliability, on closer inspection, as a combined property of man -machine complex, is described by four attributes: reliability, redundancy, faultlessness and availability. Safety, as a man - machine - environment property is described by a collection of five attributes: protectionability, hazardousness, harmlessness, safeguardability and deleteriousness. Durability as a machine property can be described by five attributes: strength, refractoriness, maintainability, supportability and serviceability. Effectiveness as a man - machine system property is described by four attributes: efficiency, capability, economically and managementability. It is acceptable to assume that the attributes mentioned above can be of use when selecting machines for outdoor exploitation and facilitating of selected tasks. Particular significance is in the relations between basic attributes of the man - machine - environment subsystem, namely: dependability is the starting point for safety and effectiveness, durability assures dependability, safety and effectiveness, adequacy guarantees a successful outcome of all named attributes of man - machine system.
Źródło:: Journal of KONES; 2007, 14, 2; 433-439
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Variability of bedload transport rate during flood flows in the Zagozdzonka River
Zmiennosc natezenia ruchu rumowiska wleczonego w czasie wezbran w rzece Zagozdzonce
Autorzy:: Popek, Z
Powiązania:: https://bibliotekanauki.pl/articles/81529.pdf
Data publikacji:: 2010
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: variability
bed load
transport
flood flow
Zagozdzonka River
lowland river
small river
Opis:: The paper presents the measurement results of bedload sediment transport during the flood flows observed in the Zagożdżonka River. The point for measuring the bedload transport, equipped with sediment catcher, devices for continuous measurements, and automated data recording, was localized above the Czarna gauge station in catchment studied by the Department of Hydraulic Engineering and Environmental Restoration, Warsaw University of Life Sciences – SGGW. The results of bedload transport measurements during one of the flood flow waves were compared to those calculated by using the Bagnold’s formula. To determine the critical bed-shear stress, the Author’s formula resulting from laboratory experiments, was used. Calculated variability of bedload transport rate during analyzed flood flow wave apparently differed from that directly measured. Nevertheless, mass of bedload achieved from calculations was lower by 6% than that from measurements, which can be considered as good result consistence.
W pracy przedstawiono wyniki pomiarów transportu rumowiska wleczonego w czasie siedmiu wezbrań obserwowanych w rzece Zagożdżonce. Do pomiaru wleczenia wykorzystano łapacz rumowiska wyposażony w aparaturę do ciągłego pomiaru i automatycznej rejestracji masy zatrzymanego w nim rumowiska. Na podstawie parametrów hydraulicznych zarejestrowanych podczas przepływu jednej z analizowanych fal wezbraniowych obliczono wartości chwilowe jednostkowego natężenia ruchu rumowiska wleczonego. W obliczeniach wykorzystano formułę Bagnolda, przy czym naprężenia graniczne określono według formuły autora, ustalonej na podstawie badań laboratoryjnych. Zmierzone chwilowe wartości natężenia wleczenia oraz całkowitą masę rumowiska wleczonego porównano z wartościami obliczonymi.
Źródło:: Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 69-77
0208-5771
Pojawia się w:: Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Proces przygotowania do transportu maszyn podstawowych na własnym podwoziu pomiędzy odkrywkami na przykładzie KWB "Konin" SA
Logistic preparation of mining machines transport on their own undercarriage between open pits in Konin Lignite Mine
Autorzy:: Jagodziński, Z.
Powiązania:: https://bibliotekanauki.pl/articles/349793.pdf
Data publikacji:: 2010
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: transport
górnictwo odkrywkowe
węgiel brunatny
maszyny podstawowe
opencast mining
lignite
mining machines
Opis:: Artykuł porusza problemy i zagadnienia konieczne do rozwiązania podczas organizowania transportu maszyn podstawowych na własnym podwoziu od strony technicznej oraz formalno prawnej. KWB "Konin" SA posiada największe doświadczenia w dziedzinie realizacji tego typu operacji ze względu na fakt wykonania największej liczby transportów maszyn podstawowych w porównaniu do innych kopalń węgla brunatnego w Polsce. W artykule przedstawiono sposób postępowania podczas logistycznego przygotowania całej operacji zarówno pod kątem przygotowania technicznego maszyn jak i załatwienia spraw formalno-prawnych.
The article discusses the problems and issues necessary to resolve during organization of the mining machinery's transport on their own undercarriage from a technical and legal point of view. Konin Lignite Mine has the most experience in conducting this type of operations due to the fact that a lot more transports of machines have been conducted than in any other lignite mine in Poland. The article demonstrates how to cope with the logistical preparation of the entire operation, both for the preparation of the equipment and the settlement of formal and legal matters.
Źródło:: Górnictwo i Geoinżynieria; 2010, 34, 4; 237-247
1732-6702
Pojawia się w:: Górnictwo i Geoinżynieria
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Wymagania w transporcie towarów niebezpiecznych oraz rola i miejsce doradcy do spraw bezpieczeństwa
Requirements for transportation of dangerous goods and tasks of safety advisers
Autorzy:: Mirowski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/234888.pdf
Data publikacji:: 2018
Wydawca:: Wojskowy Instytut Techniczny Uzbrojenia
Tematy:: przewóz
towary niebezpieczne
klasy towarów niebezpiecznych
ADR
umowa europejska
przewóz drogowy
doradca
transport
dangerous goods
classes of dangerous goods
European agreement
road transportation
adviser
Opis:: W artykule przedstawiono wymagania i obowiązki osób funkcyjnych odpowiedzialnych za przewóz, pakowanie, załadunek, napełnianie lub rozładunek, w tym szczególnie rolę i zadania doradcy do spraw bezpieczeństwa w transporcie towarów niebezpiecznych. Na bezpieczny i bezkolizyjny przewóz materiałów niebezpiecznych ma wpływ wiele czynników. Przepisy jedynie ogólnie określają wymagania dotyczące przygotowania dokumentacji przewozowej i oznakowania pojazdów do przewozu. Opisano najczęściej występujące uchybienia dotyczące zarówno dokumentacji, wyposażenia jak i oznakowania pojazdów. Artykuł dotyczy głównie przewozu transportem drogowym.
The paper dwells on qualifications and obligations needed for persons responsible for transportation, packing, loading, filling or unloading of goods, concerning especially the importance and tasks of advisers on transportation safety of dangerous goods. Many factors influence the safe and smooth transport of dangerous articles. Regulations specify only general requirements for preparing documentation of shipment and marking the vehicle for carriage. The paper describes some faults which happen most often with documentation, marking, equipment and accessories of vehicles. The paper deals mainly with the road transport.
Źródło:: Problemy Techniki Uzbrojenia; 2018, 47, 145; 83-104
1230-3801
Pojawia się w:: Problemy Techniki Uzbrojenia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: ABS system use impact on braking torque in aviation brake
Autorzy:: Skorupka, Z.
Powiązania:: https://bibliotekanauki.pl/articles/245882.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
motor vehicle
brake
brake design
brake tests
ABS tests
Anti-Lock system
Opis:: ABS (Anti-Locking) systems improve performance and safety of the braking systems. Use of ABS is now factory standard in both commercial and military aviation. ABS system in its origin was designed in order to prevent wheels from slipping and locking on the low friction surfaces such as ice. By preventing wheel, locking ABS system helps in not losing control over the vehicle during difficult braking conditions. In Aviation ABS, systems were introduced quite early as mechanical systems but their common usage is connected with computer and electronic systems development in 1970’s. In aircraft, ABS systems are responsible for safety of braking by preventing phenomena described above and for preventing landing with engaged brakes what is common in military and in big commercial aviation. In modern aviation ABS systems use is both safety and economical feature resulting in visible profits during airplane lifetime. Other question is efficiency of the process i.e. braking torque value. Braking torque is the most important parameter of brake from exploitation point of view. It is directly connected with braking distance as well with amount of force needed to achieve assumed braking parameters for the mechanical vehicle. Stability of braking torque is important in order to get optimized characteristics of the braking process itself. Most of the brake characteristics and efficiency calculations were based on assumption that braking torque should be stable during braking process. In this paper author would like to investigate ABS use impact on braking torque, which by definition is not stable in anti-lock equipped systems. Author will base on literature sources as well as on results of laboratory tests made during development of ABS system for 2700 kg take off mass airplane made in Landing Gear Laboratory of Warsaw Institute of Aviation in which author works on daily basis.
Źródło:: Journal of KONES; 2014, 21, 1; 259-265
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Introduction to the theory of hazards
Autorzy:: Smalko, Z.
Powiązania:: https://bibliotekanauki.pl/articles/247104.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
antropotechnical system
risk
hazard
Opis:: The paper outlines the theory of risks occurring during the use of the antropotechnical type systems. In the presented approach a logical theory of mathematical principles of reliability and man - machine systems theories have been used. Unreliability and failure of the man - machine system depends on the circumstances in which it is located for which four states is possible to identify: natural environment, environment technosphere type state, man psychological state, device technical state. It was pointed out that into the phenomenological reality type surroundings where antropotechnical type systems is operating, potential damages and in their follows as inefficient damages and losses are possible, results processing both energy and information into the useful and awaiting results. It consists of a variety of factors forcing undesirable changes in the antropotechnical type system. The destruction process of the antropotechnical type system under operation results external forces treatment from the environment, including technosphere type of infrastructure and internal forces of destructive processes, as well as any control errors generated by the human (e.g.: device operator, decision maker). The possible sequence of cause undesirable consequences inevitably resulted in the creation is presented as follows: 1. primary causes type of adverse events - they are internal and/ or external factors and failure to enforce human from original reliability, 2. secondary causes type effect - they are damages and losses and the consequences of legal and financial nature. The primary causes type results with damage to the device, the inefficient operator ending destruction and degradation of environment. It has been accepting that risky procedure is based on taken responsibility for any damages or losses, taken danger possible events of any project under consideration, as well as any results which are not known in advance. The risky decision is when we are taken any decision under uncertainty conditions and possible hazards whose consequences to be feared. It was pointed out also that in certain circumstances, dynamic assessment of acceptable level of risk is based on estimation the ability the expected remaining time to hazardous events. It was suggested that the theory of risk in practice forms the scientific basis for engineering safety as a separate discipline of technical sciences.
Źródło:: Journal of KONES; 2011, 18, 4; 457-462
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Braking moment comparison and analysis for various brake designs using results from sample and full scale friction material tests
Autorzy:: Skorupka, Z.
Powiązania:: https://bibliotekanauki.pl/articles/242444.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
motor vehicle
brake
brake design
brake tests
full scale tests
model tests
friction material
Opis:: Brake is one of the most important safety feature in every mechanical vehicle from bikes to airplanes. Brakes have to be designed in order to meet safety, reliability, efficiency and economical requirements. One has to remember that not only design of brake is important but also friction material used in its construction. Without proper materials, brakes are not able to generate proper braking moment. Braking moment is the most important parameter of brake from operation point of view. It is directly connected to braking distance as well with amount of force needed to achieve assumed braking parameters for the mechanical vehicle. Stability of braking moment is important in order to get optimized characteristics of the braking process itself. Most of the brake characteristics and efficiency calculations base on assumption that braking moment should be stable during braking process. During years of tests made on full scale brakes and friction material sample tests, author observed that real braking moment curve is not stable during braking process. This phenomenon is likely to affect braking efficiency and in result slightly change braking distance. In this paper author would like to address this issue by showing brake moment curves made for different brakes and friction materials. Tests, which were author’s base for paper contents, were made using full scale brake testing and friction material sample testing. All of the tests described in the paper were performed in Landing Gear Laboratory of Warsaw Institute of Aviation in which author works on daily basis
Źródło:: Journal of KONES; 2013, 20, 1; 303-308
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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