Temat: vehicle vibration - Katalog OPAC zbiorów

Skocz do pozycji: 1.

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

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Skocz do pozycji: 2.

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

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Skocz do pozycji: 3.

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

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Skocz do pozycji: 4.

Tytuł:: Simulating researches of impact reaction of vehicle on subgrade in identification possibility aspect
Badania symulacyjne udarowego oddziaływania pojazdu na podłoże w aspekcie możliwości jego rozpoznawania
Autorzy:: Jackowski, J.
Hryciów, Z.
Powiązania:: https://bibliotekanauki.pl/articles/241607.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
pojazd kołowy
rozpoznanie
modelowanie
wheeled vehicle
identification
modelling
vibration
drgania
Opis:: In the paper chosen questions relating to the impact reaction of vehicle on subgrade caused by its movement over road unevenness were described. The problems of vehicles identification during armed conflicts and realizing tasks in frames of peacekeeping missions are introduced. The algorithm of vehicle identification process on the basis of subgrade vibrations caused by its movement was proposed. The model of analysed fragment of road surface worked out using the finite elements method (FEM) was described. The parameters characterizing separate layers of the road were passed. The method of construction loading by the pressure of wheels on road surface was passed as well as the general characteristics of analysed wheeled vehicles. The example results of simulating researches were put - the courses of accelerations and velocity of chosen point surface. The method of detection of number vehicle axles on the basis of ground vibration using time - frequency distribution was described. The basic dependences of Wagner -Ville distribution were passed as well. In the paper the examples results of identification of vehicles with differing mass and number of axels were put.
W pracy opisano wybrane zagadnienia dotyczące udarowego oddziaływania pojazdu na podłoże wywołane jego ruchem po nierównościach drogi. Przedstawiono problematykę zdalnego rozpoznania pojazdów w czasie konfliktów zbrojnych i realizacji zadań w ramach misji pokojowych. Zaproponowano algorytm procesu rozpoznawania pojazdu na podstawie drgań podłoża wywołanych jego ruchem. Opisano model analizowanego fragmentu nawierzchni drogi opracowany przy wykorzystaniu metody elementów skończonych (MES). Podano parametry charakteryzujące poszczególne warstwy drogi. Podano sposób obciążania konstrukcji siłami nacisku kół na nawierzchnię drogi, a także ogólną charakterystykę analizowanych pojazdów kołowych. Zamieszczono przykładowe wyniki badań symulacyjnych - przebiegi przyspieszeń i prędkości wybranego punktu nawierzchni. Opisano metodę detekcji liczby osi jezdnych samochodu na podstawie drgań gruntu wykorzystującą rozkłady czasowo-częstotliwościowe. Podano także podstawowe zależności rozkładu Wagnera-Ville'a. W pracy zamieszczono również przykładowe wyniki rozpoznania pojazdów różniących się masą oraz liczbą osi.
Źródło:: Journal of KONES; 2007, 14, 1; 219-226
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

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

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