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Wyświetlanie 1-15 z 23
Tytuł:
Concept of a system for remote vibration measurement in electric vehicles driven by rotaring body motors
Autorzy:
Syroka, Zenon
Powiązania:
https://bibliotekanauki.pl/articles/2133932.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
vibration
electric vehicle
vibration measurement
Opis:
The article proposes a vibration measurement system for electric vehicles powered by motors with rotating housing. The motors were designed and patented by the author. The presented solution is characterized by low cost, high reliability and minimal power consumption. Block diagrams of the designed system were presented and described in detail.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2022, 25(1); 77--85
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of vibration transfer characteristics of vehicle suspension system employing inerter
Autorzy:
Shen, Y.
Chen, L.
Liu, Y.
Zhang, X.
Powiązania:
https://bibliotekanauki.pl/articles/281766.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
vehicle
suspension
inerter
vibration analysis
Opis:
In this paper, the force transfer mechanism of three mechanical elements “inerter, spring and damper” is analyzed based on the “force-current” analogy theory. The vibration isolation performance of the two types of simple three-element vehicle suspensions S1 (inerter is in parallel with damper) and S2 (inerter is in series with damper) are studied. The dual-mass system model of the suspensions is built by means of using the mechanical impedance method. The influence of parameters variation on vibration transfer characteristics is also investigated.
Źródło:
Journal of Theoretical and Applied Mechanics; 2017, 55, 4; 1245-1256
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of stiffness of engine suspension cushions in an all-terrain vehicle on its transverse displacement
Autorzy:
Gardyński, L.
Caban, J.
Droździel, P.
Powiązania:
https://bibliotekanauki.pl/articles/347796.pdf
Data publikacji:
2015
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
machinery diagnostics
engine vibration
rubber vibration isolation
military all-terrain vehicle
Opis:
The article presents the results of experimental research carried out for different types of diesel engine suspension cushions (plate connectors) in two all-terrain cars. The study was performed using three types of engines in three combustion engines operating conditions. The analyzed parameters were transverse displacement engine vibrations caused during various engine operating conditions between the engine and body of the vehicle. The results of the tests of different types of plate connectors for engine suspension can be useful when designing propulsion systems for military vehicles and military utility all-terrain cars, or as shown by the author [4,5] to modernize the existing military vehicles. Vibrations transmitted to the body chassis can also have a significant impact on the operation of the vehicle mounted equipment and weaponry.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2015, 2; 95-102
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of vertical vibrations affecting a child transported in a child seat during a car passing over the release speed bump
Autorzy:
Frej, Damian Paweł
Zuska, Andrzej
Cadge, Karin
Powiązania:
https://bibliotekanauki.pl/articles/263571.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
vehicle safety
vibrations
child seat
vibration comfort
Opis:
The article presents the results of research on the assessment of vibrational comfort of children carried in child seats. The work analyzes the impact of the child's mass and the speed of the car passing through the speed bump on the level of vibration to which the passenger (child) transported in the child seat mounted on the rear seat of the car is exposed. The tested car seats were installed in a passenger car using the ISOfix base. During the tests, the measured values were the acceleration of the seat child seat, the backrest of the child seat, the rear seat of the car and the child seat ISOfix base. As part of the research, car drive through the speed bump were carried out at different car speeds and with different mass simulating the mass of a child. The test results were analyzed in order to determine the magnitude of vibrations generated during car drive through the speed bump. Based on the results obtained, the level of vibrational comfort of a child trip in a child seat was assessed.
Źródło:
Archiwum Motoryzacji; 2019, 86, 4; 111-125
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on structure and directional distribution of vibration generated by engine in the location where vibrations penetrate the human organism
Badania struktury i rozkładu kierunkowego drgań pochodzących od silnika w miejscach wnikania do ciała kierowcy
Autorzy:
Burdzik, R.
Powiązania:
https://bibliotekanauki.pl/articles/329178.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
vibration propagation
vibration structure
car vehicle
propagacja drgań
struktura drgań
pojazd samochodowy
Opis:
The paper presents the results of investigation on directional distribution of vibration generated by engine. The vibration are strongly correlated to comfort and safety of driving. The results of the research enable analyzing the vibration propagation from engine to human body. The structures and directional distribution of the vibrations have been registered in the location where vibrations penetrate the human organism.
W artykule przedstawiono wyniki badań kierunkowego rozkładu drgań generowanych przez silnik pojazdu na postoju. Komfort i bezpieczeństwo jazdy są ściśle powiązane z drganiami pojazdu. Uzyskane wyniki badań umożliwiają precyzyjną analizę propagacji drgań od silnika do organizmu człowieka. Drgania rejestrowano w 3 osiach w miejscach konstrukcyjnych, w których drgania przenoszone są na ciało człowieka.
Źródło:
Diagnostyka; 2013, 14, 2; 57-61
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pregnant women when riding in a motor car – selected issues
Autorzy:
Więckowski, D.
Jaśkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/906240.pdf
Data publikacji:
2014
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
pregnant woman
motor vehicle
vibration impact
passive safety
Opis:
The issue of passive safety of pregnant women travelling by car has been discussed. The pregnant woman’s body has been considered as a complex dynamic system subject to various impacts that take place during a car ride. In the field of motorization, much attention is paid (and rightly so) to the issue of safety of pregnant women travelling by car in consideration of road accidents. Motor vehicle accidents are the most important cause of death of pregnant women, according to data published by the National Highway Traffic Safety Administration (NHTSA). In the USA, about 130 000 pregnant women being in the second half of their pregnancy are annually involved in motor vehicle accidents. In this paper, some example solutions have been presented that are to improve the passive safety of riding in a motor car, including those proposed to minimize the injuries that may be sustained in result of an accident. The issue of the possible negative effects of a road accident or collision on a pregnant woman has also been raised. The application of virtual techniques has been discussed and examples of modelling a pregnant woman have been shown. Some research results concerning the deceleration values that might be dangerous for pregnant women have been given, with reference having been made to statistical data on fatal accidents.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 39 (111); 169-174
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods of verification of main transmission gear boxes on test bench using vibration measurement
Autorzy:
Walentynowicz, J.
Trawiński, G.
Wieczorek, M.
Polak, F.
Boruta, G.
Powiązania:
https://bibliotekanauki.pl/articles/247281.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
multi wheeled vehicle
transmission gearbox
vibration measures
test stand
Opis:
The methodology of research and the inspection of the main transmission gearboxes of multi axles armoured vehicle ROSOMAK under operating conditions are described in this article. Tests are carried out on the bench to allow force transmission changes to the extent similar to the loads that occur during vehicle operation. Transmission gear boxes are driven by an internal combustion engine 359 through a reducer (standard engine gearbox). This reducer increase torque and decrease shaft speed similar to condition in the vehicle. On the other side of the transmission, multiplying gearbox coupled with a brake dynamometer were placed. It increases speed according to requirements of the work field of the dynamometer W-230. The combustion engine made possible to measure vibration of transmission gearboxes under the high torque. The torque is greater than obtainable by using electric motors. The value of the inertia moment loading axle shaft was determined using a simplified kinematic diagram. During the tests, vibration were measured at selected points of the housing using different methods of attachment of vibration transducers. First, the screw for assembling the vibration sensor was glued to the hull of gearbox. Second, the sensor was connected with gearbox by permanent magnets. Third, the sensor was used as a hand probe. The results of vibration measured by these methods were compared. Temperature of the gearbox was also measured by using thermocouples and thermovision methods. Selected results are presented and analysed of vibration transmission and its temperature at selected working conditions.
Źródło:
Journal of KONES; 2013, 20, 4; 471-478
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of vibrations of gasoline and diesel vehicles as a function of their engine sizes
Autorzy:
Łoza, Łukasz
Wróbel, Radosław
Sitnik, Lech
Powiązania:
https://bibliotekanauki.pl/articles/133959.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
vehicle
vibration
engine
Fourier
vibrometer
pojazd
drgania
silnik
wibrometr
Opis:
This paper presents a study of vibrations appearing in a vehicle in the process of its operation. The authors describe the primary source of the vibrations and their propagation in the entire structure. The observations were performed on the passenger cars with various gasoline and diesel engines. The aim was to examine the level of damping factor in the different locations in the car, precisely specified for the purpose of this studies. The secondary goal was to develop an effective method of obtaining and analyzing signals generated during the engine operation. The chosen instrument was Laser Doppler Vibrometer (LDV), which is used as the non-intrusive measurement utensil to detect velocity variations in designated places. The signals are gathered and collected as group of sinusoidal characteristics in the time domain. In order to achieve specific information about every component of the original signal, the authors apply Fast Fourier Transform (FFT) as the analyzing method. It allows to distinct the basic sinusoidal characteristics in the frequency domain through the spectral analysis. Based on the results, the authors are able to distinguish the dominant modes from the complex signal and indicate their impact on the car.
Źródło:
Combustion Engines; 2019, 58, 3; 20-23
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A unit to recover energy from a drivers seat vibration in a motor vehicle
Autorzy:
Rode, H.
Korzybski, W.
Powiązania:
https://bibliotekanauki.pl/articles/246793.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
energy recuperation
energy recovery
vibration energy
motor vehicle
driver's seat
Opis:
Combustion engines drive motor vehicles, which are commonly used, and their efficiency does not exceed forty per cent. It is hard to accept such a waste of energy nowadays when there is less and less fossil fuel and the ecological norms are being tightened. That is why hybrid power transmission systems and systems for energy recuperation - especially kinetic, so far being lost – are becoming more popular. One of such solutions is a unit to recover energy from a driver's seat vibration in a motor vehicle. It allows changing the kinetic energy of the vibrating seat into the electric one. Such a unit is installed under the driver's seat and supports the gaseous shock absorber. The unit consists of two toothed bars, coupled by two pairs of gear wheels, which drive the alternating current generator rotor. The rotor is joined with a driving shaft by one-way centrifugal clutches. One bar drives the rotor while the seat moves down and the other - while the seat moves up. The rotor is equipped with permanent magnets, which, by rotation, induce the power in the stator's winding. The generated power goes through the voltage stabilizing and rectification systems (4.75-5.25 V) and charges four batteries connected to USB output. The obtained electric energy may be used to supply other electronic devices, e.g. mobile phones. The unit will be installed in a farm tractor. The research checking the unit's effectiveness will be carried out in the near future.
Źródło:
Journal of KONES; 2012, 19, 3; 391-394
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibration transmissibility behaviour of high order biodynamic models used in vehicle seat design
Autorzy:
Behari, N.
Noga, M.
Powiązania:
https://bibliotekanauki.pl/articles/241548.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
vehicle seat
biodynamic model of higher order
vibration transmissibility
mechanical impedance
Opis:
The effects of vibration transmissibility using high order biodynamic models of four, five and seven degrees of freedom that can replicate a human body exposed to vibration transmissibility while driving was investigated to identify resonant frequencies associated with injury. It was found that these models address vehicle seat deformities and represent the body hop motion when driving. The five degree of freedom models provided the best results to approximate resonant frequencies associated with the legs, lower torso, spine and whole body vibration at the seat person interface, while the driver's hands were on the steering and was supported with a backrest. The four degree of freedom model excluding the backrest was able to replicate experimental data and a sensitivity analysis of the stiffness and damping parameters indicated that this model was more robust compared to the others, and could predict whole body vibration to accommodate for intra subject variability. Non-linear damping and stiffness properties were noticed for acceleration magnitudes greater than 1g root mean square (rms) and for high order models, which provide greater anatomical description to predict injury in contrast to simple models that have large lumped masses to represent the upper and lower torso. In addition, biodynamic models greater than seven degrees of freedom can be utilised with non-linear stiffness and damping techniques to predict vibration and impedance behaviour for greater number of body ligaments applied to old seats or retrofit seat design applications.
Źródło:
Journal of KONES; 2016, 23, 3; 33-40
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tire and Engine Sources Contribution to Vehicle Interior Noise and Vibration Exposure Levels
Autorzy:
Abouel-Seoud, Shawki
Powiązania:
https://bibliotekanauki.pl/articles/178006.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
vibro-acoustic
interior vibration
interior noise
tire-road interaction
vehicle engine
Opis:
The main objective of the research presented in this paper is to enhance driver-passengers Comfort of a vehicle that in turn leads to better vehicle safety and stability. The focus was put on studying the interior vibration and noise contributions originated from tire-road and engine-transmission subsystems, due to their significant impact on the dynamic performance of the vehicle. The noise and vibration measurements were recorded at the driver’s head position and on the driver legs room. Furthermore, the influence of different tire types and road surface textures on the vehicle interior noise and vibration were considered. The results indicate that the widely used conventional engine mounts and tires in commercial vehicles cannot fulfill the conflicting requirements for the best isolation concerning both road surface and engine-transmission induced excitations. The values of driver’s head position sound pressure level and floor vibration acceleration broadband averages originate for engine-transmission are lower than that for tire-road interaction. Furthermore, the values of RMS, crest factor, kurtosis and IRI for the vehicle waveform were estimated for vehicle speeds, tire types and road surface textures. Moreover, the percentage contribution for both interior noise and vibration originated from tire-road interaction is higher than the one from vehicle engine-transmission system in all the vehicle speed range, tire type and road surface texture considered.
Źródło:
Archives of Acoustics; 2019, 44, 2; 201-214
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of the influence of lateral suspension parameters on the ride quality of railway vehicles
Autorzy:
Dumitriu, M.
Powiązania:
https://bibliotekanauki.pl/articles/280158.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
railway vehicle
ride quality
lateral suspension
vibration behaviour
R.M.S. acceleration
Opis:
This paper deals with the influence of parameters of the lateral suspension on the ride quality of railway vehicles during running on a track with lateral deviations, compared to the designing geometry. The ride quality is evaluated at speed 200 km/h, based on lateral accelerations in three reference points of the vehicle carbody. The values corresponding to these accelerations are derived from numerical simulations on a non-linear model of the vehicle with 21 degrees of freedom. The results thus obtained validate a series of features in vibrational behaviour of the railway vehicle and the possibility to improve the ride quality by the best possible selection of the suspension parameters.
Źródło:
Journal of Theoretical and Applied Mechanics; 2016, 54, 4; 1231-1243
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibration isolators test bench
Autorzy:
Pobedin, A.
Kosov, O.
Shekhovtsov, K.
Powiązania:
https://bibliotekanauki.pl/articles/244493.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
vibration isolator
test bench
vehicle cabin
suspension
testing
elastic and damping characteristic
Opis:
The description of the scheme and design of the test bench for testing vibration isolators intended for use in the vehicle's cabin suspension. Test bench construction allows to implement a wide range of loadings on vibration isolator of the vehicle cabin, to investigate the impact of the loading's arm changing and to perform analysis of the vibration isolator’s elastic and damping characteristics changing impact on cushioning quality. Variant of the test bench construction modernization, which can allow applying typical exploitation loads, which include vertical and lateral components, is described. We propose a scheme of forced oscillations excitation system on the test bench by cam-eccentric mechanism. It includes a DC motor with stepless frequency regulation and with cams of different shape on its shaft, which affect the contact surface of the test bench's vertical H-beam of a rocker arm. We also propose a scheme of forced oscillations excitation system on the test bench by inertial exciter. It includes a DC motor with stepless frequency regulation with inertial vibration exciter on its shaft, which consists of a mass, placed eccentrically relative to the shaft axis. There are two variants of the test bench scheme – with the forced oscillations excitation device and without it.
Źródło:
Journal of KONES; 2011, 18, 1; 457-462
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A proposal for a mobile system of vehicle and rail track diagnostics
Autorzy:
Komorski, Paweł
Kominowski, Julian
Motyl, Mateusz
Powiązania:
https://bibliotekanauki.pl/articles/2203880.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
vehicle
rail track
diagnostics
vibration measurements
pojazd
tor kolejowy
diagnostyka
pomiary drgań
Opis:
The proper technical condition of a vehicle and rail track in operation is a key aspect in terms of safety and travel comfort. This issue is of particular importance for operators and managers of rolling stock and rail infrastructure. Currently, many diagnostic systems have been developed to monitor the technical condition of selected vehicle systems or rail track from the viewpoints of both the vehicle and track. This article proposes the use of vibration signals in selected quantitative and qualitative analyses as the main diagnostic parameter. For this purpose, over a dozen vibration measurements were carried out during the normal operation of a freight wagon as part of a so-called passive experiment. Measurement points were located on the axle boxes of the wheelsets. The proposed research methodology served as a basis for comparative analyses of the selected operational cases that were investigated. The most important conclusion from the study is that it is possible to monitor the technical condition of vehicles and tracks in real time on the basis of measurements of vibration accelerations at the vehicle level. This directly increases the service life of rolling stock and optimises operating costs by changing the maintenance strategy to one that takes into account the idea of modern on-board technical diagnostics. Another important aspect is the possibility of the varied use of the proposed measurement system, depending on the purpose of the research, which is also associated with the diagnostician’s experience in processing vibroacoustic signals and the utilization of simple or complex quantitative and qualitative analyses.
Źródło:
Transport Problems; 2022, 17, 2; 45--56
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical investigation of the influence of aerodynamic forces and wheel dynamic loads of a vehicle subjected to kinematic excitations
Autorzy:
Makowski, Michał
Grzesikiewicz, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/127659.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
magneto-rheological damper
vehicle
control algorithm
vibration
tłumik magnetoreologiczny
pojazd
algorytm sterowania
drgania
Opis:
This paper presents the investigations of vibrations of a vehicle equipped with controlled magneto-rheological (MR) dampers and aerodynamic elements. A scaled sports vehicle model was developed to conduct this research. The tests were carried out with kinematic excitation resulting from road roughness and motion at a variable speed. During the airflow, the aerodynamic elements forces and moments on the test body. Vehicle vibrations are limited by the means of MR controlled dampers. The damping force is determined on the basis of an algorithm, where various strategies for determining forces in MR damper have been adopted. Two criteria were considered for assessing the effectiveness of the control algorithm - minimising vertical acceleration and changes in wheel normal reactions on road surface. This paper presents the results of those studies.
Źródło:
Vibrations in Physical Systems; 2019, 30, 2; 1-8
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
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