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Wyświetlanie 1-14 z 14
Tytuł:
Research on ride comfort performance of a metal tire
Autorzy:
Zhenglong, Z.
Bin, S.
Jiangang, L.
Zhiguang, D.
Zhongbo, H.
Powiązania:
https://bibliotekanauki.pl/articles/199852.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
metal tire
filtering method
ride comfort
extended structures
Opis:
A new type of non-inflatable metal tire is designed to prevent the flat tire caused by puncture and shrapnel penetration, and it can be used on star rovers and military or civilian wheeled vehicles. In order to study vibration damping characteristics of the new wheel, a specimen with the same size as the pneumatic tire (235/70 R16) is made for contrast tests. A filtering method is proposed to reduce impulse and random interference noise collected vibration signal. Comparative analysis of ride comfort performance is conducted by solving weighted acceleration root mean square (RMS) values. The results show that the filtering method has a good effect, and ride comfort of the metal tire is slightly worse, while it has a better grasping ability. Therefore, some extended structures have been recommended to improve the vibration damping performance.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 491-502
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability analysis of semi-active inerter-spring-damper suspensions based on time-delay
Autorzy:
Liu, Changning
Chen, Long
Zhang, Xiaoliang
Yang, Xiaofeng
Powiązania:
https://bibliotekanauki.pl/articles/2055032.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
semi-active suspension
time-delay
controllable inerter
stability
ride comfort
Opis:
To analyze the variation rule of the critical instability time-delay of the semi-active ISD suspension, a general solution was proposed and applied into two three-element-structure ISD suspensions. The dynamical response and the performance of the semi-active ISD suspension in various time-delays indicated that different structures had different suspension performance. The time-delay deteriorated the performance of all of the suspensions which were analyzed. The stability of the semi-active ISD suspension would seriously weaken with the critical time-delay. This paper provided a general solution for parameters selection in semi-active ISD suspension design to avoid the negative effect of the time-delay.
Źródło:
Journal of Theoretical and Applied Mechanics; 2020, 58, 3; 599--610
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The research of influence of additional vibration isolators system on dynamics loads of passengers
Badania wpływu zastosowania dodatkowego układu wibroizolacji na obciążenia dynamiczne przewożonych osób
Autorzy:
Borkowski, W.
Hryciów, Z.
Powiązania:
https://bibliotekanauki.pl/articles/243364.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
pojazdy
zawieszenie
drgania
komfort jazdy
vehicles
suspension
vibration
ride comfort
Opis:
In the paper chosen questions relating to improvement of ride comfort of passengers in wheeled vehicles are described. The solution consisting on use additional vibration isolation system with rubber-metal connectors are introduced. The object of researches, researches stand and measuring apparatus are described. The experimental conditions are passed as well as speed of vehicle and applied roadblocks. In the paper the examples results of experimental researches are put as well as for determinist and random excitations. The vertical accelerations of car body with vertical accelerations of additional vibration isolation system are compared. Comparisons are achieved with using standard deviations of runs and RMS of accelerations. In the paper the influence of vibration in vertical and horizontal directions are estimated. Advantages of this type of system are passed as well. Diagram of vehicle with the researches stand, researches stand in vehicle, view of roadblocks, vertical acceleration and displacement of plate towards a car body for 30 km/h, vertical accelerations and RMS of vertical accelerations, transverse accelerations for unpaved road and 20 km/h are presented in the paper.
W pracy opisano wybrane zagadnienia dotyczące poprawy komfortu jazdy osób przewożonych w pojazdach samochodowych. Przedstawiono rozwiązanie polegające na zastosowaniu dodatkowego układu izolacji drgań zbudowane w oparciu o łączniki gumowo-metalowe. Opisano obiekt badań, stanowisko badawcze oraz zastosowaną aparaturę pomiarową. Podano również warunki prowadzenia badań eksperymentalnych, a w tym prędkości jazdy oraz stosowane przeszkody. W pracy zamieszczono przykładowe wyniki badań eksperymentalnych, otrzymanych zarówno dla wymuszeń deterministycznych oraz wymuszeń o charakterze losowym. Porównano przebiegi przyspieszeń pionowych nadwozia pojazdu z przyspieszeniami pionowymi dodatkowego układu wibroizolacji. Porównania dokonano przy wykorzystaniu odchyleń standardowych zarejestrowanych przebiegów oraz wartości skutecznych przyspieszeń. W pracy oceniono również wpływ drgań w kierunku pionowym, wzdłużnym i poprzecznym na komfort jazdy. Podano także korzyści wynikające ze stosowania tego typu układu. Schemat pojazdu ze stanowiskiem badawczym, stanowisko badawcze w pojeździe, widok przeszkody, przyspieszenia pionowe i przemieszczenie płyty względem nadwozia dla 30 km/h, przyspieszenia pionowe dla drogi nieutwardzonej i 20 km/h, wartości skuteczne przyspieszeń pionowych dla drogi nieutwardzonej i prędkości 20km/h, przyspieszenia w kierunku poprzecznym dla drogi nieutwardzonej i prędkości 20km/h są prezentowane w artykule.
Źródło:
Journal of KONES; 2007, 14, 3; 101-108
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Using an Inerter on the Performance of Vehicle Active Suspension
Autorzy:
Alshabatat, Nabeel
Shaqarin, Tamir
Powiązania:
https://bibliotekanauki.pl/articles/2201718.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
inerter
active suspension
nonlinear quarter-car model
ride comfort
feedback linearization
Opis:
This paper investigates the effect of employing an inerter on the performance of active suspension systems. A quarter-car model with cubic-nonlinear spring is considered. The inerter is installed in parallel with the primary suspension spring and damper. First, feedback linearization (FBL) is used to linearize the mathematical model. Then the linear quadratic regulator (LQR) is adopted to control the suspension system. The proposed design is ride comfort-oriented and considers structural constraints. Numerical simulations are executed for passive systems with different values of inertance. Results show that employing an inerter to the passive suspension can improve the ride comfort performance by more than 32%. Employing an inerter to active suspension systems can also improve the ride comfort and reduce actuator force significantly. The actuator force can be reduced by 25%. However, the results also show that the uncaring selection of the inerter can dramatically degrade the performance of the suspension system.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 3; 331--339
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The vehicle ride comfort increase at the expense of semiactive suspension system
Autorzy:
Podzorov, A.
Prytkov, V.
Cherkashina, E.
Liashenko, M.
Powiązania:
https://bibliotekanauki.pl/articles/244491.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
vehicle
semi-active suspension
ride comfort
shock absorber
pneumatic spring
multidimensional model
Opis:
The problem of control by a semi-active suspension for increase a ride comfort of a vehicle is considered. On an example of multidimensional mathematical model of the bus, an efficiency of a semi-active suspension with controllable shock absorbers and pneumatic springs is analyzed. Results of computer simulation of movement of the bus with a semi-active suspension on road with a stochastic profile are presented. Calculations have been executed in the program of modelling of dynamics of systems solid and elastic bodies - FRUND. As conclusions it is possible to notice that the semiactive suspension with controlled under offered laws elastic and damper elements allows to depress considerably dynamic ability to loading spring vehicle parts, thereby, raising its stroke ride comfort, without deterioration of parameters influencing stability and movement roadability. Results of numerical experiment and offered laws of controlling can form a basis for creation structurally concerning simple semiactive suspension systems a not demanding for work of a significant amount of power. The semiactive suspension with controlled under offered laws elastic and damper elements allows depressing considerably dynamic ability to loading spring vehicle parts, thereby, raising its stroke ride comfort, without deterioration of parameters influencing stability and movement roadability.
Źródło:
Journal of KONES; 2011, 18, 1; 463-470
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frequency analysis of vertical vibrations acting on a baby transported in a child car seat
Autorzy:
Więckowski, D.
Powiązania:
https://bibliotekanauki.pl/articles/244973.pdf
Data publikacji:
2013
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
baby in a car seat
vibration impact
ride comfort
human body vibration
Opis:
The biggest dangers that may result from human exposure to vibrations caused by vehicle movement occur in automotive transport [6]. The vibrations experienced during vehicle ride may cause a variety of pathological symptoms arising in people. The adverse health effects may also include reduced motion control, blurred vision, or impairment of the ability of free communication, memory processes, or perception [6]. The paper covers the impact of vertical vibrations on a baby riding in a safety seat in a car, with addressing in particular the dangers caused by mechanical vibrations to children in transport facilities. Two options were considered, with the safety seat being installed on either the front or rear car seat. Experimental road tests were carried out with using a dummy representing the baby. The lack of research work on this issue has been emphasised. For the sake of maximum safety, babies should be transported in safety seats. The type approval tests of child safety seats are chiefly focused on the evaluation of protection from harmful collision effects, according to UN ECE Regulation No. 44 [S13]. Regrettably, they do not include tests to determine the influence of vibrations, especially those occurring during “normal” ride, on the child’s body.
Źródło:
Journal of KONES; 2013, 20, 1; 359-366
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and Simulation of a Vehicle Suspension with Variable Damping versus the Excitation Frequency
Autorzy:
Suciu, C. V.
Tobiishi, T.
Mouri, R.
Powiązania:
https://bibliotekanauki.pl/articles/308449.pdf
Data publikacji:
2012
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
optimal damping and stiffness
ride comfort
transfer function of the human body
Opis:
In this work, three types of vehicle suspensions were considered and modeled as follows: oil damper mounted in parallel with a compression helical spring, for which a Kelvin-Voigt model, consisted of a dashpot and an elastic element connected in parallel is considered; colloidal damper without attached compression helical spring, for which a Maxwell model, consisted of a dashpot and an elastic element connected in series is considered; and colloidal damper mounted in parallel with a compression helical spring, for which a standard linear model, consisted of a Maxwell unit connected in parallel with an elastic element is considered. Firstly, the vibration transmissibility from the rough road to the vehicle's body for all these suspensions was determined under the constraint that damping varies versus the excitation frequency. Then, the optimal damping and stiffness ratios were decided in order to minimize the transmissibility of vibration from the rough pavement to the vehicle's body.
Źródło:
Journal of Telecommunications and Information Technology; 2012, 1; 83-89
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combined control of hydropneumatic springs of the vehicle
Autorzy:
Liashenko, M.
Podzorov, A.
Shekhovtsov, V.
Prytkov, V.
Cherkashina, E.
Powiązania:
https://bibliotekanauki.pl/articles/247202.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
controlled suspension system
ride comfort
hydropneumatic spring
road tests
spatial mathematical model
vehicle
Opis:
The article is devoted to research of a vehicle ride comfort, equipped the suspension system with combined control of springing and damping elements. The spatial mathematical model of a vehicle which meets the requirements of adequacy to real object was developed. The results of the computer simulation of movement of the vehicle with controllable and passive suspension systems on stochastic microprofile are presented. It can be concluded that the spatial multi-mass model is satisfactory close to a real object and can be used for further calculations. Having analyzed simulation results we can state significant increase of ride comfort of a vehicle equipped with a controlled suspension system. Decrease of vertical acceleration of a cabin in a place where a driver sits amounted to 40% in average that can be considered as a limit value for this type of controlled suspension systems. It can be noted that a suspension system with combined control of springing and damping elements can be considered as rather effective in terms of decreasing load of vehicle spring-mounted parts that along with low power consumption makes it rather competitive. The shown research results and control laws for springing and damping elements can be used as a basis for development of relatively simple controlled suspension systems.
Źródło:
Journal of KONES; 2011, 18, 4; 229-234
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania poziomu komfortu wibracyjnego w wybranych tramwajach
Research of vibration discomfort in selected trams
Autorzy:
Król, S.
Szczygieł, J.
Powiązania:
https://bibliotekanauki.pl/articles/256194.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
dyskomfort wibracyjny
drgania
tramwaj
transport miejski
komfort jazdy
vibration discomfort
vibration
tram
transport city
ride comfort
Opis:
W niniejszym artykule autorzy przedstawiają wyniki badań przeprowadzonych w wybranych tramwajach Krakowskiej Komunikacji Miejskiej. Badaniem objęto dwa typy tramwajów: 105Na i NGT6. Badania miały na celu oszacowanie poziomu dyskomfortu wibracyjnego w losowo wybranych pojazdach. Badania zostały zrealizowane na torowiskach śródmiejskich Krakowa o znacznym stopniu zużycia eksploatacyjnego. Na podstawie zarejestrowanych sygnałów przyspieszeń drgań zostały obliczone współczynniki r.m.s, PCT.
The article presents the results of Cracow trams comfort tests. The 105Na and NGT6 trams were the subject of tests. The evaluating of vibration comfort level was the aim of tests. The tests were carried out on old Cracow tram tracks. On the bases of the vibration acceleration signals, the r.m.s. index and Pct index were calculated.
Źródło:
Problemy Eksploatacji; 2009, 2; 99-108
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ride comfort for various passenger positions in a railway vehicle - simulation study
Symulacyjne badania komfortu jazdy dla różnych położeń pasażera w pojeździe szynowym
Autorzy:
Kardas-Cinal, E.
Powiązania:
https://bibliotekanauki.pl/articles/224251.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pojazd szynowy
komfort jazdy
pasażer
pozycja pasażera
symulacje numeryczne
railway vehicle
ride comfort
passenger position
track condition
Opis:
The paper presents the analysis of ride comfort of a railway vehicle based on the results of numerical simulations for a model of a passenger car moving along a tangent track with random geometrie irregularities. The lateral and vertical rms accelerations in 1/3 octave frequency bands as wen as the weighted rms accelerations are calculated at several positions within the car body for two track sections with different track condition and for various vehicle velocities. The obtained accelerations are compared with the comfort and decreased fatigue boundaries according to the ISO 2631-1 and PN-91/S-04100 standards.
W pracy przedstawiono analizę komfortu jazdy pasażera pojazdu szynowego na podstawie wyników symulacji numerycznych dla modelu wagonu pasażerskiego poruszającego po torze prostym i sztywnym o losowych nierównościach geometrycznych. Wyznaczono poprzeczne i pionowe przyspieszenia skuteczne w pasmach tercjowych oraz odpowiadające im przyspieszenia ważone dla różnych położeń pasażera wewnątrz nadwozia pojazdu. Badania przeprowadzono dla dwóch odcinków toru o różnym stanie utrzymania oraz dla różnych prędkości jazdy. Otrzymane przyspieszenia porównano z wartościami granicznymi określonymi w normach ISO 2631-1 i PN-91/S-04100.
Źródło:
Archives of Transport; 2010, 22, 2; 189-199
0866-9546
2300-8830
Pojawia się w:
Archives of Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis on the influence of suspended equipment on the ride comfort in railway vehicles
Autorzy:
Dumitriu, M.
Powiązania:
https://bibliotekanauki.pl/articles/139507.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
railway vehicle
flexible carbody
suspended equipment
bending vibrations
ride comfort
pojazd szynowy
elastyczna karoseria
zawieszenie
drgania giętne
komfort jazdy
Opis:
To study the impact of suspended equipment on the ride comfort in a railway vehicle, a rigid flexible general model of such a vehicle is required. The numerical simulations is based on two different models, derived from the general model of the vehicle, namely a reference model of a vehicle with no equipment, and another model with six suspended elements of equipment mounted in various positions along the carbody. The objective of this paper arises from the observation that the literature does not contain any study that highlights the change in the ride comfort resulting exclusively due to the influence of equipment. The influence of the suspended equipment on the ride comfort is determined by comparing the ride comfort indices calculated in the carbody reference points, at the centre and above the two bogies, for a model with six elements of equipment and a model of the vehicle with no equipment.
Źródło:
Archive of Mechanical Engineering; 2018, LXV, 4; 477-496
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influences of Carbody Vertical Flexibility on Ride Comfort of Railway Vehicles
Autorzy:
Dumitriu, M.
Cruceanu, C.
Powiązania:
https://bibliotekanauki.pl/articles/139631.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
railway vehicle
vertical vibrations
carbody flexibility
ride comfort
comfort index
pojazd szynowy
wibracje pionowe
elastyczność nadwozia
komfort jazdy
wskaźnik komfortu
Opis:
The article investigates the influence of the carbody vertical flexibility on the ride comfort of the railway vehicles. The ride comfort is evaluated via the comfort index calculated in three reference points of the carbody. The results of the numerical simulations bring attention to the importance of the carbody symmetrical vertical bending upon the dynamic response of the vehicle, mainly at high velocities. Another conclusion is that the ride comfort can be significantly affected as a function of the symmetrical bending frequency of the carbody. Similarly, there are improvement possibilities for the ride comfort when the best selection of the stiffness in the longitudinal traction system between the carbody and bogie and the vertical suspension damping is made.
Źródło:
Archive of Mechanical Engineering; 2017, LXIV, 2; 219-238
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vehicle suspension system modelling and simulation in the SolidWorks software environment with motion analysis applications
Autorzy:
Melnychuk, S.
Vitiuk, I.
Bovsunivskyi, I.
Beherskyi, D.
Kubrak, Y.
Powiązania:
https://bibliotekanauki.pl/articles/196708.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
stability
ride comfort
testing methodology
vehicle suspension
cushioning
roll
vibration frequency
stabilność
komfort jazdy
metodologia badawcza
zawieszenie pojazdu
amortyzacja
rolka
częstotliwość drgań
Opis:
An N1 vehicle model is created, which allows for changing suspension parameters and conditions of experimental performance. A methodology of computer testing performance for vehicle ride comfort and stability service properties’ characterization in a virtual environment is proposed. Vehicle suspension system modelling and simulation are performed. The results of the N1 vehicle suspension system from full-scale laboratory and road tests are given.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2017, 97; 117-130
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neural network based feedback linearization control of a servo-hydraulic vehicle suspension system
Autorzy:
Pedro, J. O.
Dahunsi, O. A.
Powiązania:
https://bibliotekanauki.pl/articles/907825.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
sieć neuronowa
sterowanie bezpośrednie
sterowanie ze sprzężeniem zwrotnym
regulacja PID
komfort jazdy
układ zawieszenia
neural networks
direct adaptive control
feedback linearization control
PID control
ride comfort
suspension system
servo-hydraulics
Opis:
This paper presents the design of a neural network based feedback linearization (NNFBL) controller for a two degree-offreedom (DOF), quarter-car, servo-hydraulic vehicle suspension system. The main objective of the direct adaptive NNFBL controller is to improve the system's ride comfort and handling quality. A feedforward, multi-layer perceptron (MLP) neural network (NN) model that is well suited for control by discrete input-output linearization (NNIOL) is developed using input-output data sets obtained from mathematical model simulation. The NN model is trained using the Levenberg- Marquardt optimization algorithm. The proposed controller is compared with a constant-gain PID controller (based on the Ziegler-Nichols tuning method) during suspension travel setpoint tracking in the presence of deterministic road disturbance. Simulation results demonstrate the superior performance of the proposed direct adaptive NNFBL controller over the generic PID controller in rejecting the deterministic road disturbance. This superior performance is achieved at a much lower control cost within the stipulated constraints.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2011, 21, 1; 137-147
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-14 z 14

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