Temat: bench - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of the procedure of evaluation of the technical condition of a high-pressure common rail fuel pump using a test bed
Autorzy:: Bor, M.
Idzior, M.
Karpiuk, W.
Smolec, R.
Powiązania:: https://bibliotekanauki.pl/articles/243763.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: common rail
test bench
diagnostic
Opis:: Piston displacement pumps use in common rail fuel injection systems generates very high pressure, reaching even 300 MPa. Maintaining such a high pressure is possible thanks to very precise machining resulting in as little clearance between the piston-cylinder assemblies. Due to very high forces operating in the systems and relatively unfavourable lubrication conditions resulting from using fuel as lubricants, the pumps are subject to wear and consequently lose their operating parameters. The high cost of production of the pumps, resulting from their technological advancement, forced their manufacturers to introduce technologies for diagnosing and regenerating them. The diagnostics consists in removing the pump from the engine and having it verified using a test bed. The first stage consists of evaluating the pump’s flow at null pressure; follow by evaluation of its maximal delivery for the pressure of 100 MPa. The obtained values are compared to the values achieved by a new pump. The effect of negative evaluation on a test bed is the disassembly of the pump, verification of the condition of its parts and replacement of the damaged elements. The authors examined new and used pumps on a tested, aiming to determine the characteristics of delivery of a pump for various pressures. The objective of the research was to identify the actual points in the pump’s operation at which the delivery drops the most due to the wear. The highest difference in delivery was found to exist for the maximal compression pressure. The obtained results were analysed and the possibility of changing the pump diagnostics procedure with the use of a test bed was determined.
Źródło:: Journal of KONES; 2018, 25, 3; 65-70
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of bench press at a specified movement tempo on post-exercise testosterone and cortisol levels
Autorzy:: Studencki, Marcin
Ignatjeva, Angelina
Nitychoruk, Magdalena
Gołaś, Artur
Smółka, Wojciech
Maszczyk, Adam
Powiązania:: https://bibliotekanauki.pl/articles/1933110.pdf
Data publikacji:: 2021-11-03
Wydawca:: PPHU Projack Jacek Wąsik
Tematy:: testosterone
cortisol
movement tempo
bench press
Opis:: Body response is a key element of the periodization of any training unit. The main control systems in the human body are the nervous and endocrine systems. The study aims to examine the effect of bench press at a specified movement tempo on post-exercise blood testosterone and cortisol levels. The study involved 16 men (experience in resistance training 5.5 ± 1.3 years, aged 24 ± 2 years, body weight 86.1 ± 7.2 kg, and 1RM 125 ± 17 kg). The first stage of the test focused on determining the maximum force based on a single bench press with the highest possible external load (1RM). The second stage included the main test, i.e. bench press. The participants were asked to perform 5 sets successively, with an external load of 70% of an individual 1RM and as many repetitions as possible. The tempo of the exercise was precisely specified. The metronome was used to set a bench press tempo. The movement tempo included time under tension (TUT) 2/0/2/0. TUT means the total time of muscle tension during one repetition. The tests showed significant changes in cortisol levels recorded 30 minutes after exercise, amounting to 13.75 (±4.60) at F=9.16 and p=0.006. and 60 minutes after exercise, amounting to 11.37 (±4.17) at F=19.46 and p=0.0002. No significant statistical values were found for testosterone levels. This study brings additional evidence of the importance of hormonal responses in muscle strength training.
Źródło:: Physical Activity Review; 2021, 2, 9; 111-119
2300-5076
Pojawia się w:: Physical Activity Review
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Load capacity of the mixed bench and slab foundation. Numerical simulations and analytical calculation model
Autorzy:: Grodecki, Michał
Powiązania:: https://bibliotekanauki.pl/articles/1845166.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: bench foundation
slab foundation
load capacity
numerical modelling
Opis:: The paper presents results of a numerical investigation on load capacity of the mixed bench and slab shallow foundations (often used in the process of the modernization of the old, antique buildings, which are suffering from lack of the load capacity). The main trouble with use of existing analytical approaches is a non-unique foundation level of the bench and slab, they could even be founded on different geotechnical layers. Proposed analytical model based on Brinch Hansen (EC-7) approach could deal with such a problem. Results of 2D and 3D numerical modelling (ultimate load of the foundation) are compared to the obtained by using the proposed approach. Influence of the soil above the foundation level is also investigated. Different width to length ratios of the foundation are analyzed (from "short" to "long" foundations). Usability of the proposed analytical model in engineering practice is proved by numerical simulations; the obtained results are on the safe side with quite acceptable margin of additional safety.
Źródło:: Studia Geotechnica et Mechanica; 2021, 43, 2; 135-141
0137-6365
2083-831X
Pojawia się w:: Studia Geotechnica et Mechanica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Analiza porównawcza procedur zadawania momentu obrotowegona hamowni silnikowej
Comparative analysis of procedures for engine torque control on a test bench
Autorzy:: Pietras, D.
Powiązania:: https://bibliotekanauki.pl/articles/157162.pdf
Data publikacji:: 2010
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: hamownia silnikowa
badania silników
test bench
engine tests
Opis:: Współczesne silnikowe stanowiska hamownicze stwarzają szerokie możliwości w symulowaniu rzeczywistych warunków pracy badanych silników oraz zapewniają szerokie możliwości pomiarowe z wykorzystaniem bardzo specjalistycznego sprzętu pomiarowego. Dokładność utrzymywania przez hamulec zadanych nastaw regulacyjnych: prędkości obrotowej oraz obciążenia istotnie wpływa na wyniki realizowanych badań doświadczalnych, dla których wymagana jest duża powtarzalność i dokładność pomiarowa. W artykule przedstawiono analizę porównawczą dwóch procedur badawczych: zadawania momentu oraz zadawania przyspieszenia, stosowanych w badaniach silników na stanowisku hamowniczym z punktu widzenia ich wpływu na wskaźniki pracy silnika, zawartość składników spalin i zadymienie. Ponadto omówione zostało stanowisko badawcze, oraz system sterowania hamownią.
Strict requirements of the exhaust emission standards as well as the ongoing drive towards fuel consumption reduction, while improving performance, are the main modern development goals placed on internal combustion engines manufacturers. Addressing this task requires the use of sophisticated research instruments of high accuracy for scientific investigations and development work. Hence, a well chosen engine test bench is also very important. Modern engine test benches create significant opportunities for simulating real working conditions of the engine under investigation, and ensure the extensive measurements capabilities, using highly specialised measuring equipment. The controlling accuracy of engine dynamometer parameters (such as rotational speed and load) influences significantly the results of experimental studies carried out for which high repeatability and accuracy of measurements are required. The paper presents a comparative analysis of two test procedures: torque and acceleration control, both of which are used for engine investigations, in terms of their impact on the indices of engine operation, exhaust emissions and smoke. The engine test bench and the dynamometer control system are also discussed.
Źródło:: Pomiary Automatyka Kontrola; 2010, R. 56, nr 3, 3; 221-224
0032-4140
Pojawia się w:: Pomiary Automatyka Kontrola
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Analysis of dynamic characteristics of an experimental bench of high-pressure water fracturing assisted cutting
Autorzy:: Liu, Zhiming
Zhang, Qiang
Sun, Yuliang
Liu, Junming
Powiązania:: https://bibliotekanauki.pl/articles/2200892.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: high-pressure water fracturing
experimental bench
dynamic characteristics
Opis:: Aiming at the problem that the cutting efficiency of a drum shearer is low when mining hard coal seams, an experimental bench of high-pressure water fracturing assisted cutting is designed. Compared with normal ones, the maximum equivalent stress of the improved experimental bench is reduced by 55.38%, and the maximum total deformation is reduced by 27.23%. According to the results of dynamic response analysis, it is concluded that the experimental bench of high-pressure water fracturing assisted cutting is stable and reliable under extreme working conditions, and meets design requirements for strength and stiffness.
Źródło:: Journal of Theoretical and Applied Mechanics; 2023, 61, 2; 317--330
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The new stand for aging of biocomponents and biofuels process testing at relatively short time
Autorzy:: Dzięgielewski, W.
Kaźmierczak, U.
Kulczycki, A.
Okniński, R.
Stefanowicz, P.
Powiązania:: https://bibliotekanauki.pl/articles/949517.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: biofuels
biocomponents
ageing process
test bench
method of measuring
Opis:: In the paper, the concept of a model bench for accelerated ageing of bio-components and biofuels was presented. It is used to simulate the ageing process of biofuels and components of vegetable or animal origin, taking place during storage in the storage tanks. The construction of the bench’s essential elements and its equipment were designed and implemented in such a way as to mostly reflect actual storage conditions in large capacity tanks. An additional and unprecedented function of the bench includes the possibility to simulate the product transport conditions. Furthermore, a method of the test, with the use of simultaneously performed traditional tests on the physical and chemical properties monitored in the process of storage was presented. An analysis of the relation between values of the parameters obtained with different methods (on the model bench and under laboratory conditions) was conducted. In addition, their usefulness to assess the impact of logistic processes on the product quality was presented. In the paper, the results of the work executed within the framework of the project “Development of a prototype of the monitoring system the ageing rate and degree of bio-components and biofuels” within the Program Innovative Economy Operational Programme, Measure 1.4. “Support for goal-oriented projects” were used.
Źródło:: Journal of KONES; 2016, 23, 2; 105-112
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: A test bench setup with programmable trajectory for IMU-based dataglove development
Autorzy:: Mańkowski, T.
Tomczyński, J.
Kaczmarek, P.
Powiązania:: https://bibliotekanauki.pl/articles/973058.pdf
Data publikacji:: 2016
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: dataglove
test bench
IMU
MARG
Universal Robots
UR3
Opis:: This paper presents a test bench created during development of an IMU-based dataglove. The system allows gathering synchronised hand phantom posture and trajectory, together with inertial sensor data for evaluation of posture recognition algorithms. The setup includes an inertial measurement system, with IMU modules designed to be mounted on human hand or a phantom, together with proper embedded firmware and PC software. The system uses a collaborative Universal Robots UR3 robot arm for generation of trajectories and as a source of ground truth data. The program used to control the robot together with a method of gathered data synchronisation are described. The test bench has been successfully used during development of a joint angles estimating algorithm.
Źródło:: Measurement Automation Monitoring; 2016, 62, 5; 178-180
2450-2855
Pojawia się w:: Measurement Automation Monitoring
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The effect of diesel fuel mixture and camelina oil ester on the process of fuel injection in traction engine
Autorzy:: Orliński, S.
Orliński, P.
Wojs, M. K.
Powiązania:: https://bibliotekanauki.pl/articles/246900.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: fuel plant
process of injection
engine test bench diesel engine
Opis:: This paper presents the results of comparative research on basic physical and chemical properties of pure diesel fuel and two types’ mixtures of Camelina oil ester (Camelina oil ester content of the mixture was 10% and 15%) and diesel fuel. Application of these mixtures has different physicochemical properties to power supply diesel engine, made it possible to detect existing differences in the injection process (pumping and spraying). The analysis of the injection process has been defined through experimental graphs of the fuel pressure in injection line and registered height of the needle injector. With the knowledge of these two fast-changing engine parameters and loadvelocity conditions, there were calculated: fuel flow speed from nozzle, range and fuel spray disintegration time and the average critical diameter of the droplets. In the final part of the article it was shown, that the fuel with different physicochemical properties has a significant impact on the injection process. There were also made a comparative assessment of the suitability test compounds for use in service.
Źródło:: Journal of KONES; 2013, 20, 1; 255-261
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Stanowisko dydaktyczne do badania procesu erozji
A didactic stand for testing the erosion process
Autorzy:: Tarasiuk, Wojciech
Panek, Izabela
Powiązania:: https://bibliotekanauki.pl/articles/271252.pdf
Data publikacji:: 2019
Wydawca:: Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
Tematy:: erozja
stanowisko badawcze
zużycie
sterilization
test bench
food raw materials
Opis:: W pracy przedstawiono projekt mobilnego stanowiska do badań procesu erozji uderzeniowej. Konstrukcja urządzenia pozwala na prowadzenie badań w zamkniętych pomieszczeniach, a niektóre czynności pomiarowe zostały zautomatyzowane. Urządzenie umożliwia ocenę wpływu kąta padania ścierniwa na intensywność zużycia erozyjnego. Parametrami, którymi można sterować, są: kąt padania strugi ścierniwa, odległość dyszy od badanej powierzchni, prędkość ścierniwa, rodzaj ścierniwa. W poniższej pracy została opisana koncepcja i zasada działania stanowiska.
The paper presents a project of a mobile stand for research on the erosion process. The construction of the device makes it possible to conduct tests in closed rooms, and some of the measurement activities have been automated. The device enables the assessment of the influence of the angle of abrasive fall on the intensity of erosion wear. Parameters that can be controlled are: the angle of incidence of the abrasive stream, the distance of the nozzle from the tested surface, the speed of the abrasive, the type of abrasive. In this paper describes the concept and principle of operation of the stand.
Źródło:: Aparatura Badawcza i Dydaktyczna; 2019, 24, 3; 212-215
2392-1765
Pojawia się w:: Aparatura Badawcza i Dydaktyczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Build Testbenches for Verification in Shift Register ICs using SystemVerilog
Autorzy:: Widianto, M.
Chasrun, H.
Lis, Robert
Powiązania:: https://bibliotekanauki.pl/articles/2134048.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: test bench
verification
shift register IC
stuck-at-faults
SystemVerilog
Opis:: A testbench is built to verify a functionality of a shift register IC (Integrated Circuit) from stuck-at-faults, stuck-at-1 as well as stuck-at-0. The testbench is supported by components, i.e., generator, interface, driver, monitor, scoreboard, environment, test, and testbench top. The IC consists of sequential logic circuits of D-type flip-flops. The faults may occur at interconnects between the circuits inside the IC. In order to examine the functionality from the faults, both the testbench and the IC are designed using SystemVerilog and simulated using Questasim simulator. Simulation results show the faults may be detected by the testbench. Moreover, the detected faults may be indicated by error statements in transcript results of the simulator.
Źródło:: International Journal of Electronics and Telecommunications; 2022, 68, 3; 619--623
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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