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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
Artykuł
Tytuł:
Assessment of disc brake vibration in rail vehicle operation on the basis of brake stand
Autorzy:
Sawczuk, Wojciech
Merkisz-Guranowska, Agnieszka
Rilo Cañás, Armando-Miguel
Powiązania:
https://bibliotekanauki.pl/articles/1841662.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
railway disc brake
brake vibration
lever mechanism
Opis:
The scientific aim of the article is to present the relationship between the vibroacoustic signals of the right and left friction pad during braking, depending on the mass distribution, as an element of the lever system. This article presents the results of tests of a railway disc brake in the scope of vibrations generated by pads in various states of wear located on both sides of the brake disc. The tests were carried out on the brake stand using the vibroacoustic method including the analysis of amplitudes and frequencies and the thermal imaging method. Special attention was paid to the analysis of the classic lever mechanism as a multimass system influencing the thermo-mechanical characteristics and vibrations of the pads on the right and left side of the brake disc. Uneven mass distribution of the system translates into uneven wear of the friction components. The scientific aim of this paper is to present the relation between vibroacoustic signals of the right and left friction pad during braking depending on the mass distribution of the lever system component.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 2; 221-230
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research to longevity brake lines on the exploitations
Исследование долговечности тормозных накладок в эксплуатации
Autorzy:
Tujrin, S.
Boyko, G.
Revin, A.
Fedotov, V.
Powiązania:
https://bibliotekanauki.pl/articles/374407.pdf
Data publikacji:
2015
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
longevity of the brake linings
vehicles
brake system
brake linings
resource of the brake lining
żywotność okładzin hamulcowych
pojazd
układ hamulcowy
okładzina hamulcowa
Opis:
Brake lines are tested for strength and durability. However, tests of strength are short-term, but tests of durability are durable, since their aim is to assess the effectiveness of the brake linings during operation. Therefore, reduction of time evaluating the durability of brake linings exploitation is urgent. The article describes the results of the research on the longevity of the brake linings of different types of vehicles based on their controllable operation and the method of accelerated estimation of the longevity of brake linings based on the operation of their analogues.
Тормозные накладки проверяют на прочность и долговечность. Но, испытания на прочность – кратковременны, а на долговечность – длительны, так как их цель заключается в оценке эффективности работы тормозных накладок в процессе эксплуатации. Поэтому сокращение времени оценки долговечности тормозных накладок в эксплуатации является актуальным. В работе приведены результаты исследований долговечности тормозных накладок различных автотранспортных средств по результатам подконтрольной эксплуатации и метод ускоренной оценки долговечности тормозных накладок по результатам эксплуатации аналога.
Źródło:
Transport Problems; 2015, 10, 2; 75-81
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evaluation of a rail disc brake braking process by using a thermal camera
Autorzy:
Sawczuk, W.
Powiązania:
https://bibliotekanauki.pl/articles/114636.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
disc brake
temperature of brake disc
camera IR
Opis:
In the rail vehicles due to the ever-increasing speed a disc brake is used as a friction brake which gradually displaces the brake-blocks. In the public transport vehicles, electrical traction units or subway; the disc break collaborates with an electrodynamic brake that limits the use of the friction brake with a simultaneous possibility of power return due to the generator character of the traction engines work. Prior to the release of brake for testing, the tests are carried out on the break positions, wherein one of the measurements is the measurement of the disc temperature by the use of thermocouples. The aim of this article is to present the use of a thermal imaging camera while testing the disc brake friction pair elements in the breaking process evaluation.
Źródło:
Measurement Automation Monitoring; 2015, 61, 6; 265-270
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laboratory Device Detecting the Magnitude of the Static Friction Coefficient of Brake Lining
Autorzy:
Hrabovský, Leopold
Hrbáč, Roman
Powiązania:
https://bibliotekanauki.pl/articles/2023972.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
friction coefficient
brake lining
dual-caliper drum brake
Opis:
The paper describes the design of laboratory equipment, which was created for verification and determination of the value of the static coefficient of friction in the contact surfaces of the brake lining and the brake drum of the drum brake with external shoes by experimental procedure. Suppliers of brake linings state values of the friction coefficients which correspond to different operating temperatures, but do not state the values of the friction coefficient of the respective brake lining with regard to the state of contamination of the contact surfaces. In practice, brake contact surfaces are exposed to moisture, dust, lubricants and oils, and these weather and operational influences significantly affect the value of the coefficient of friction. The results of laboratory tests performed with two types of brake linings (commonly used in practice) (fabric, hardened rubber) show that the coefficient of friction of a given brake lining is strongly influenced by the state of contamination of the contact surfaces.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 2; 191-197
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
The influence of the high energy brake applications on the disc brake performance : established by inertia brake dynamometer testing
Wpływ hamowania z dużą energią na hamulec tarczowy : określone poprzez badania na stanowisku dynamometrycznym do badań hamulców
Autorzy:
Dąbrowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/313510.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
hamulec tarczowy
hamowanie
SUV
disc brake
brake
Sport Utility Vehicles
Opis:
Article describes the dangers resulting in improper brake components choice and using them in an incorrect way. It shows the results of the tests conducted on the Brake Dynamometer test station on three different Sport Utility Vehicles.
Artykuł opisuje zagrożenia związane z niewłaściwym doborem komponentów hamulca oraz z użytkowania hamulców w niewłaściwy sposób. Pokazuje wyniki badań hamulców z trzech pojazdów samochodowych typu SUV wykonanych na stanowisku dynamometrycznym do badań hamulców.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 6; 601-606, CD
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mass optimizing of the brake disctolighttricycle
Autorzy:
Sokołowski, P.
Magryta, P.
Powiązania:
https://bibliotekanauki.pl/articles/117966.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
tricycle
brake disc
mass optimizing
Opis:
The article presents an optimization process of the brake disc in terms of mass and strength resistance. A model of the disc was made using three-dimensional software – Catia V5 (CAD). Model has been subjected to the parameterization process for the strength calculations. A brake disc was fixed at the location of the mounting screws and subjected to torque resulting from the braking process. As a result of calculations, a set of parameters that meet the established boundary conditions was obtained as shown in the article.
Źródło:
Applied Computer Science; 2015, 11, 2; 17-28
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New approach to brake pad wear modelling based on test stand friction-mechanical investigations
Autorzy:
Sawczuk, Wojciech
Merkisz-Guranowska, Agnieszka
Rilo Cañás, Armando-Miguel
Kołodziejski, Sławomir
Powiązania:
https://bibliotekanauki.pl/articles/2172038.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
brake pad mass wear
test stand disc brake investigations
rail vehicle disc brake
Opis:
The paper presents the results of investigations of a railway disc brake system related to the mass wear of its brake pads. The tests were carried out on a certified brake stand designed to determine the friction-mechanical characteristics of the brakes. The test stand was additionally equipped with a thermographic camera to observe the contact points of the brake pads with the disc. Particular attention was drawn to investigating the impact on the mass wear of the brake pads of such parameters of the braking process as contact surface of the brake pad with the rotor, thickness of the brake pads as the indicator of their initial wear, clamping force of the pads against the rotor, rail vehicle mass to be decelerated, and speed, at which the deceleration begins. The scientific aim of the paper is to present the relations between the mass wear of the brake pads and the quantities that characterize the braking process. A regression model was determined to estimate the wear of the brake pads based on a single braking process with the preset input quantities.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 3; 419--426
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of selected service operations on the effectiveness of brake system operation
Autorzy:
Witaszek, K.
Stanik, Z.
Filipczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/246329.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
technical testing of vehicles
braking efficiency
brake disc
brake pad
Opis:
This paper attempts to clarify what impact has selected technical maintenance tasks on the effectiveness of the braking system with special emphasis on the initial break-in period of associated components. Were conducted studies involving measurements of braking forces on a rolling station and road tests Renault Thalia of car braking during which was recorded deceleration, speed, temperature of brake discs and the force of the pressure on the brake pedal. Braking process on the rolling station was assessed with a braking efficiency ratio as a criterion. However, results collected during road tests allowed studying for more accurate of running-in process of car barking system elements. This was due to taking into account the total vehicle braking force compared with the force applied to the brake pedal. The study was performed for the discs and brake pads exhibiting a different degree of wear, with particular emphasis on the running-in elements occurring immediately after replacing brake pads. In this case, there is a noticeable loss of performance brake system, which persists after initial running in mating faces of the pad and the brake disc. This phenomenon is known from workshop car service practice, but there is a need for sensitization of staff at the Pre-reaching elements of the service operations, because operation of a vehicle with a temporarily reduced efficiency of the braking system on a public road has the potential to cause threats to the safety of road users.
Źródło:
Journal of KONES; 2016, 23, 4; 555-560
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aircraft brake temperature from a safety point of view
Autorzy:
Piľa, J.
Korba, P.
Hovanec, M.
Powiązania:
https://bibliotekanauki.pl/articles/196528.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
brake
temperature
overheating
aircraft safety
brake cooling
hamulec
temperatura
przegrzanie
bezpieczeństwo samolotów
chłodzenie hamulców
Opis:
Safety is critical throughout all stages of aircraft operation, from air mission to ground operation. One of the most important airframe systems that influences the efficacy of ground safety is a wheel brake system. Aircraft ground speed deceleration requires the dissipation of kinetic energy, which depends on aircraft weight and speed. Significant levels of aircraft kinetic energy must be dissipated in the form of heat energy. The brakes of heavy aircraft are especially prone to overheating during landing and taxiing on the ground. The aim of this paper is to focus on the dangers caused by aircraft brakes when overheating and ways in which to eliminate brake overheating problems from a safety perspective.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2017, 94; 175-186
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Results from laboratory tests of new electric brake prototype
Autorzy:
Grygorcewicz, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/241562.pdf
Data publikacji:
2019
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
laboratory test
electric brake
braking process
Opis:
The main idea of this article was to compare the results of new design electric brake to the older version of hydraulic brake in laboratory tests. The energy of braking should be very similar due to the same mass of the airplane. That is why the laboratory tests of both brakes were took place in the same stand. Of course, the parameters were similar but not at all. The main idea was to create the solution, which could be used in vehicle like airplane. The electric brakes could replace traditional hydraulic brake solution. The results could be interesting for every researcher who is interested in brakes. Other important idea of this article was to describe the tests of new electric brake prototype. The purpose of the tests was to check designing of electric brakes. The electric brake prototype should ensure sufficient efficiency, safety, reliability and durability during braking, which is required in certification processes and is particularly important when researching innovative solutions. It was really important to verify the design and check the parameters. Of course, there is really important to remember that in every new type of the prototype solutions there are many pros and cons, which are typical only for considered design. Nowadays every electric brake design is different because there is a lot of new concept.
Źródło:
Journal of KONES; 2019, 26, 3; 47-52
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of frictional properties of the disc brake working elements in order to increase efficiency of brake systems of the rolling stock
Ocenka frikcionnykh svojjstv rabochikh ehlementov diskovogo tormoza s celju povyshenija ehffektivnosti tormoznykh sistem podvizhnogo sostava
Autorzy:
Pogrebnova, N.
Powiązania:
https://bibliotekanauki.pl/articles/793495.pdf
Data publikacji:
2012
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
friction brake
disk brake
brake system
frictional property
rolling stock
working element
molecular-mechanical theory
theoretical research
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature distribution in a brake disc with variable contact pressure
Autorzy:
Topczewska, K.
Powiązania:
https://bibliotekanauki.pl/articles/134744.pdf
Data publikacji:
2016
Wydawca:
ADVSEO
Tematy:
braking
frictional heating
temperature
brake disc
Opis:
The aim of this study was to investigate the influence of the time of pressure increase during single braking on the temperature in a brake disc. The case of linear pressure increase from zero to nominal value in the initial stage of braking and maintaining this value to standstill was considered. The time distribution of the sliding velocity of frictional elements was determined from the differential equation of motion with the initial condition. Based on the time distributions of pressure and sliding velocity, the intensity of the frictional heat flux, which affects on the disc surface, was determined. Spatio-temporal distribution of the temperature in a brake disc was found from analytical solution of the heat conduction boundary–value problem for semi–space heated on the outer surface heat flux with known a priori intensity. The numerical analysis conducted allowed to determine engineering equation, which describes relation between maximum temperature and the time of pressure increase.
Źródło:
Technical Issues; 2016, 1; 90-95
2392-3954
Pojawia się w:
Technical Issues
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Specific features of automobile brake linings
Špecifiká skúšok brzydových obložení automobilov
Autorzy:
Hlavňa, V.
Powiązania:
https://bibliotekanauki.pl/articles/263701.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
braking
brake linings
laboratory testing
Opis:
Braking of road vehicles can be characterized as an active - either wanted or unwanted reduction of the force necessary for maintaining the required speed, decreasing the speed, stopping or keeping the vehicle at a standstill. During braking the vehicle loses the acquired motion energy which is most frequently transformed (in case of wanted braking) in the brake system of the vehicle into useless heat released to the environment. Brake force can be defined as the force acting against the motion of a vehicle which is, in case of wanted braking produced by the vehicle braking system. In case of wanted braking we usually begin with the equilibrium equation of vehicle forces. The paper deals with objective findings and assessment of possible causes leading to the braking system failure paying special attention to the brake lining. The user can approach the brake lining failure from two points of view: being aware or unaware of it. Laboratory tests can be used to objectively assess characteristics of brake linings. Both operational and laboratory test are performed to detect characteristics of brake lining materials. Apart from theoretical considerations, the paper also contains results of experiments performed with different brake lining materials used for trucks and passenger automobiles.
Źródło:
Archiwum Motoryzacji; 2013, 2; 21-33, 137-149
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł

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