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Wyszukujesz frazę "caterpillar" wg kryterium: Temat


Tytuł:
Special features of dynamic design of a tractor track
Autorzy:
Ivantsov, V.
Ivantsov, A.
Ivantsov, S.
Powiązania:
https://bibliotekanauki.pl/articles/244143.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ractor caterpillar
eyelets of track
caterpillar hinge
caterpillar finger
dynamic calculation
track (a caterpillar link)
Opis:
In the paper chosen problems of dynamics of caterpillar finger in an open metal seven eyelet hinge is described. A low reliability of the caterpillar chains seems to be a consequence of design proces s of agricultural tractors. For this reason, dynamic calculation of the caterpillar finger of tractor is presented. Probe is spent on tractor VT - 150 manufactures TK "VgTz" having caterpillars with seven eyelets cast track in a mode of correction of the set direction of working-class movement on plough. In the paper example results of theoretical and experimental researches is presented. Results of the study experimental of the dynamics loads in caterpillar finger of the tractor with plow have shown that it is possible his consideration as springy symmetric steel peg on two steel full tilts. Analysis of usage of the agricultural caterpillar tractors and results of calculations confirm that the dynamics calculations are more exact then previous assumptions. New recommendations to caterpillars constructors are put in order to increase tractors reliability. The frequency of caterpillar finger should be enlarged by increasing of his acerbity. In the paper, a new set of main parameters of VT — 150 caterpillar fingers is presented in comparison with nominal one.
Źródło:
Journal of KONES; 2009, 16, 1; 203-207
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Agency suspensions of a back idler on angular oscillations of a tractor with the triangular caterpillar contour
Autorzy:
Varfolomeyev, V.
Pobedin, A.
Powiązania:
https://bibliotekanauki.pl/articles/246051.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
triangular caterpillar contour
suspension
back idler
modelling
Opis:
Main route of development of an agricultural tractor construction is raise of productivity of Caterpillar at the expense of increase in working speeds and tractors and tool width. Such direction of development demands simultaneous development of running systems and suspensions of caterpillars. The analysis of possibility of application of running system with triangular Caterpillar contour in farm tractors is in-process made. The mathematical model of the Caterpillar has been developed for research conducting realised in the environment of SIMULINK. Within the limits of conducting of the analysis of a construction of running system with triangular Caterpillar contour more effective construction of a suspension of a back idler in comparison with existing suspensions has been developed. On a designed construction of a suspension the patent is gained. The spent mathematical simulation of oscillations ofa case of a tractor with various arrangements of running systems and at tractor operation on the most widespread regimes has displayed efficiency as designed circuit design of a tractor with triangular contour, and a designed construction of a suspension of a back idler. Working out of a technique of optimisation of a suspension bracket of the developed running system as a whole under concrete conditions of operation is necessary.
Źródło:
Journal of KONES; 2009, 16, 1; 507-511
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Agency of the suspension of the back idler on transport vibration of the tractor with triangular caterpillar contour
Autorzy:
Pobedin, A.
Varfolomeev, V.
Powiązania:
https://bibliotekanauki.pl/articles/244487.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
triangular caterpillar contour
suspension
back idler
modelling
Opis:
Recently leading producers of farm tractors even more often apply in running systems triangular caterpillar contour (TCC). In such running system one of the most problem knots is the back idler (BI) which is loaded by reaction from a caterpillar track and from weight of the casco having on this support. Thus the vertical component of reaction from a tension of a caterpillar track in addition loads with a tie-rod tangential force suspension bracket BI, thereby disturbing with a casco and reducing smoothness of a course of a tractor. Modelling and the analysis of dependence of affecting of vibration on a seat of the motor-man depending on applied type of a suspension bracket of a back idler are in-process executed. The analysis of parameters of smoothness of a course for the circuit design with triangular caterpillar contour and the offered suspension bracket of a back idler showed that in comparison with base configuration of a tractor of family VT On transport operations, at traffic on the soil road with the lifted tool, affectings on a seat of the operator decrease in 1,1-1,7 times in vertical and in 1.1-1.2 times in horizontal directions, at work with nominal loading, and also with Rkr=50 kN, on an eddish, provides minor alteration of smoothness of a course, the divergence of values of affecting on a seat of the operator, on the average, makes 12–19 %. In comparison with triangular caterpillar contour and "a classical" suspension bracket of a back idler, various displacement-yoke systems of a back idler, at work on transport operations, slightly influence a divergence of parameters of affecting on a seat of the operator which make 2.6 % and 4 % for vertical and horizontal affectings accordingly. At work with nominal loading on an eddish, affectings on a seat of the operator decrease in 1.7–2.7 times in vertical and in 1.4–1.8 times in horizontal directions and at work with draw-bar loading of Rkr=50 kN on an eddish, affectings on a seat of the operator decrease in 1.4–2.1 times in vertical and periodically increase on some speeds no more than by 30 % in a horizontal direction.
Źródło:
Journal of KONES; 2011, 18, 1; 447-452
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the packing of two copies of a caterpillar in its third power
Autorzy:
Germain, Christian
Kheddouci, Hamamache
Powiązania:
https://bibliotekanauki.pl/articles/743385.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
packing
placement
permutation
power of tree
caterpillar
Opis:
H. Kheddouci, J.F. Saclé and M. Woźniak conjectured in 2000 that if a tree T is not a star, then there is an edge-disjoint placement of T into its third power.In this paper, we prove the conjecture for caterpillars.
Źródło:
Discussiones Mathematicae Graph Theory; 2003, 23, 1; 105-115
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radio number for some thorn graphs
Autorzy:
Marinescu-Ghemeci, Ruxandra
Powiązania:
https://bibliotekanauki.pl/articles/744574.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
multilevel distance labeling
radio number
caterpillar
diameter
Opis:
For a graph G and any two vertices u and v in G, let d(u,v) denote the distance between u and v and let diam(G) be the diameter of G. A multilevel distance labeling (or radio labeling) for G is a function f that assigns to each vertex of G a positive integer such that for any two distinct vertices u and v, d(u,v) + |f(u) - f(v)| ≥ diam(G) + 1. The largest integer in the range of f is called the span of f and is denoted span(f). The radio number of G, denoted rn(G), is the minimum span of any radio labeling for G. A thorn graph is a graph obtained from a given graph by attaching new terminal vertices to the vertices of the initial graph. In this paper the radio numbers for two classes of thorn graphs are determined: the caterpillar obtained from the path Pₙ by attaching a new terminal vertex to each non-terminal vertex and the thorn star $S_{n,k}$ obtained from the star Sₙ by attaching k new terminal vertices to each terminal vertex of the star.
Źródło:
Discussiones Mathematicae Graph Theory; 2010, 30, 2; 201-222
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new suspension system of an autonomous caterpillar platform
Autorzy:
Jurkiewicz, A.
Nabagło, T.
Kowal, J
Apostoł, M.
Powiązania:
https://bibliotekanauki.pl/articles/279782.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
caterpillar platform
test stand
logarithmic spring
simulation
ADAMS
Opis:
The article contains results of a conceptual work and research which develops a semi-active suspension of the 2S1 caterpillar platform. The results are collected on designed and built test stands and used in three alternative models of the platform suspension system. The first one is based on the existing construction of the platform. The other two have been modernized by using new solutions in the tracked vehicles suspension technology associated with a torsional spring element. The authors assumed simulation conditions for straight line driving while the model overcomes an obstacle in one track. The results of simulations are compared and analyzed to improve parameters of the vehicle suspension.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 4; 857-867
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The research of the dynamic load of the power train of the caterpillar tractor Chetra 6C-315
Autorzy:
Shekhovtsov, V.
Sokolov-Dobrev, N.
Shevtchuk, V.
Liashenko, E.
Powiązania:
https://bibliotekanauki.pl/articles/244457.pdf
Data publikacji:
2011
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dynamic load
power train
dynamic model
torsional vibration
caterpillar tractor
Opis:
The paper describes the developed dynamic model of the caterpiller's power transmission. Its advantage is the integrated dimensional model of caterpillar propeller. Animated motion modelling provides the formation and transfer of kinematic and dynamic disturbances from caterpillar chassis, causing the greatest loadings of the power circuit sections. The principle of power transmission mathematical model’s differential equations forming is described. Result of the model's computational research is a set of oscillograms of the drive wheel’s torque changing for different operating modes. The values of power transmission masses' natural frequencies are obtained. The research of the nature of transmission sections' dynamic loading by torsional vibrations, that arise and spread on the shafting, when the linked track rewinds, is carried out. The diagrams show that local maximums of dynamic coefficients characterize the regimes with high hook load. The increase of torques for these sections happens because of approximation of the peculiar frequency of the system and the frequency of one of the harmonic components of stimulating actions. At this peak, value of the oscillation belongs to the masses, the partial frequencies of which are closest to the frequencies to the stimulation actions. Dynamic load of such sections is quite high. The material of these sections often gets fatigue damage, which can lead to breakdown. The analysis of the diagrams, made for basic operation speeds between 1,0 – 5,5 m/sec showed, that maximal peak values of dynamic coefficients appear on sections between 10 and 59 masses in the transmission. Maximal dynamic load of these sections appear at hook load from 0 to 40 kN.
Źródło:
Journal of KONES; 2011, 18, 1; 535-546
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving the Consistency and Continuity of MODIS 8 Day Leaf Area Index Products
Autorzy:
Kandasamy, S.
Neveux, P.
Verger, A.
Buis, S.
Weiss, M.
Baret, F.
Powiązania:
https://bibliotekanauki.pl/articles/227345.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
iterative caterpillar singular spectrum analysis
MODIS
LAI
gap-filling
smoothing
Opis:
Time Series Analysis of Leaf Area Index (LAI) is vital to the understanding of global vegetation dynamics. The LAI time series derived from satellite observations are usually not complete and noisy due to cloud contamination and uncertainties in the retrieval techniques. In this paper, the continuity and consistency of the MODIS 8 day LAI products are improved using a method based on Caterpillar Singular Spectrum Analysis. The proposed method is compared with other standard methods: Savitzky-Golay filter, Empirical Mode Decomposition, Low Pass filtering and Asymmetric Gaussian fitting. The experiment demonstrates the smoothing and gapfilling ability of the developed method, which is more robust across the biomes both in terms of root mean square error metrics and bias metrics as compared to the standard methods.
Źródło:
International Journal of Electronics and Telecommunications; 2012, 58, 2; 141-146
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pine processionary caterpillar, Thaumetopoea pityocampa Denis and Schiffermuller, 1775 contact as a health risk for dogs
Autorzy:
Kaszak, I.
Planellas, M.
Dworecka-Kaszak, B.
Powiązania:
https://bibliotekanauki.pl/articles/6451.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
pine processionary moth
caterpillar
Thaumetopoea pityocampa
health risk
dog
lepidopterism
Opis:
Pine processionary, Thaumetopoea pityocampa Denis and Schiffermüller, 1775 is a moth that belongs to the order of insects Lepidoptera, and family Notodontidae. The larvae of pine processionary moth are the main pest of pines all over the world, but mainly in Mediterranean region. The contact with pine processionary caterpillar (lepidopterism) can produce a strong inflammatory reaction on skin and mucous membranes. Other findings include hyperthermia, tachypnoea, respiratory distress, cyanosis and tongue oedema, labial angioedema, ptyalism, bilateral submandibular lymphadenomegaly, conjunctivitis and severe tongue necrosis. Tough, few veterinary cases have been published. Also in Poland pine processionary moth (Thaumetopoea pinivora) is present, especially near the Baltic coast and can be a possible health risk for both humans and animals (especially dogs). The aim of this article is to increase knowledge about the clinical manifestations of pine processionary caterpillar contact, which may be useful for diagnosis of this dangerous disease.
Źródło:
Annals of Parasitology; 2015, 61, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The computational research of the dynamic load of the power train sites of the caterpillar tractor
Rasčetnye issledovaniâ dinamičeskoj nagryžennosti učastkov silovoj peredači guseničnogo traktora
Autorzy:
Shehovtsov, V.
Sokolov-Dobrev, N.
Shevtchuk, V. P.
Ljashenko, M. V.
Kalmikov, A.
Powiązania:
https://bibliotekanauki.pl/articles/263705.pdf
Data publikacji:
2013
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
dynamic load
power train
dynamic model
torsional vibration
caterpillar tractor
Opis:
The paper describes the developed dynamic model of the caterpiller’s power transmission. Its advantage is the integrated dimensional model of caterpillar propeller. Animated motion modeling provides the formation and transfer of kinematic and dynamic disturbances from caterpillar chassis, causing the greatest loadings of the power circuit sections. The principle of power transmission mathematical model’s differential equations forming is described. result of the model’s computational research is a set oscillograms of the drive wheel’s torque changing for different operating modes. The values of power transmission masses’ natural frequencies are obtained. The research of the nature of transmission sections’ dynamic loading by torsional vibrations, that arise and spread on the shafting, when the linked track rewinds, is carried out.
Źródło:
Archiwum Motoryzacji; 2013, 2; 79-91, 195-208
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decreasing of dynamic loading of tractor’s powertrain by means of change of reactive element torsional stiffness
Autorzy:
Kalmikov, A. V.
Sokolov-Dobrev, N. S.
Shekhovtsov, V. V.
Ljashenko, M. V.
Potapov, P. V.
Powiązania:
https://bibliotekanauki.pl/articles/242814.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
dynamic load
power train
dynamic model
torsional vibration
caterpillar tractor
Opis:
This article describes original method proposed by authors that provides decreasing of dynamic loading of tractor’s powertrain by means of change of reactive element torsional stiffness. In tracked vehicles one of the most loaded elements is final drive unit which loaded by high dynamic modes. In tractor Chetra 6C-315, final drive is epicyclic where stopped element is ring gear. Authors propose using of strictly resilient (5 degrees in forward-backward direction) mount of ring gear instead of stiffening. Design study of installation between hub and gear ring that connects drum and crown gear, of the resilient metal plates pack was performed. This pack is kind of elastic coupling. Resilient packets of coupling sustain loads and smooth over peak dynamic loads and after elastic deformation of these packets rigid coupling between hub and coupling crown is provided at contact surfaces of skewed stops of hub and crown. To analyse efficiency of proposed method of dynamic loadings decreasing of powertrain elements three-dimensional model of powertrain was created in “Universal Mechanism”. In addition, solid model of caterpillar mover was created in the same software for analysis of influence on powertrain loadings of complex of kinematic and dynamic factors influencing forming of torque on driving sprockets. This article presents results of modelling of loading processes in powertrains elements with elastic coupling and without it during longitudinal motion at various speeds and in turns with various radii. Results show that elements dynamic loading at high loading dynamic modes in case of installed coupling is decreased by 20-30%.
Źródło:
Journal of KONES; 2015, 22, 1; 127-134
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Podwodny eksplorator gąsienicowy
Underwater caterpillar explorator
Autorzy:
Filipek, P.
Kamiński, T.
Wiązowski, J.
Czajka, B.
Powiązania:
https://bibliotekanauki.pl/articles/313738.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
pojazd podwodny
eksplorator gąsienicowy
zdalne sterowanie
underwater vehicle
caterpillar explorator
remote control
Opis:
W artykule przedstawiono proces projektowania i budowy zdalnie sterowanego gąsienicowego łazika do eksploracji podwodnej. Dokonano niezbędnych obliczeń i oszacowano listę wymaganych podzespołów. W dalszej części przedstawiono szczegółowo zamodelowany projekt 3D oraz układ elektroniczny eksploratora. Kolejne rozdziały opisują model rzeczywisty pojazdu i przeprowadzone testy.
The paper shows a process of designing and constructing a remotely controlled caterpillar jeep for underwater exploration. All required calculations were made. A list of required units was estimated. Then, a detailed 3D project and an electronic circuit of the explorator were shown. Further chapters describe an actual model of the vehicle and prosecuted tests.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 6; 673-677, CD
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transportowy pojazd gąsienicowy o zwiększonym prześwicie
Transport vehicle caterpillar with higher ground-vehicle clearance
Autorzy:
Filipek, P.
Filipiuk, G.
Goławski, S.
Ptaszyński, D.
Powiązania:
https://bibliotekanauki.pl/articles/312118.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
pojazd gąsienicowy
prześwit pojazdu
układ jezdny
vehicle caterpillar
vehicle clearance
traction system
Opis:
W artykule przedstawiono proces projektowania i budowy zdalnie sterowanego transportowego pojazdu gąsienicowego o zwiększonym prześwicie. Wykonano model 3D pojazdu oraz sporządzono obliczenia zapotrzebowania na siłę i moment napędowy. Zaprojektowany i wykonany został także układ elektroniczny i oprogramowanie sterowników. Wykonano rzeczywisty pojazd i przeprowadzono testy, które pojazd pozytywnie zaliczył.
The paper shows a process of designing and constructing a remotely controlled transport caterpillar vehicle with a higher ground-vehicle clearance. It also includes a 3D model of the vehicle and calculations of required force and momentum. Electronics and drivers' software were also designed and wrought. An actual vehicle was built and tested. The tests had a positive result.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 6; 652-657, CD
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of jet links' parameters on the stress loading of tractor's power train sites
Autorzy:
Godzhaev, Z.
Powiązania:
https://bibliotekanauki.pl/articles/244090.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
caterpillar transport
power train
dynamic stress loading
mathematical model
results of researches
Opis:
In the article are described the results of calculation researches of influence of ruggedness of fastening to aframe in cross-section and longitudinal planes of case parts of a power chain of a caterpillar, and also ruggedness of communication with aframe in the same planes of a combustion engine on dynamic stress loading of sites of a power train during movement with different speeds. Except the specified ruggedness of fastening, this dynamic loading depends on parameters of shifting jerks which take place in a power shafting owing to non-uniformity of action of the basic operational loadings - oscillations oftraction resistance, cross-section and axial vibrations of a framework of a tractor on a suspender, rewinds of a Caterpillar chain, non-uniformity of rotation of a shaft of the engine. Researches have shown that at the expense of steering of ruggedness of fastening to an engine bed and case parts of transmission it is possible to essentially lower dynamic stress loading of separate sites of transmission in movement modes when details of these sites are loaded as much as possible. The circuit solution is offered for realization in a fastening design to a frame of the case of transmission of caterpillars of VT family which will allow to lower stress loading of transmission details on certain speeds of movement.
Źródło:
Journal of KONES; 2009, 16, 1; 145-156
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and analysis of a novel concept-based unmanned aerial vehicle with ground traversing capability
Autorzy:
Kumar, Ramanuj
Gour, Surjeet S.
Pandey, Anish
Kumar, Shrestha
Mohan, Abhijeet
Shashwat, Pratik
Sahoo, Ashok K.
Powiązania:
https://bibliotekanauki.pl/articles/2105984.pdf
Data publikacji:
2022
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
unmanned aerial vehicle
unmanned ground vehicle
rough terrain
quadcopter
caterpillar wheel
kinematic analysis
Opis:
Unmanned aerial vehicle (UAV) is a typical aircraft that is operated remotely by a human operator or autonomously by an on-board microcontroller. The UAV typically carries offensive ordnance, target designators, sensors or electronic transmitters designed for one or more applications. Such application can be in the field of defence surveillance, border patrol, search, bomb disposals, logistics and so forth. These UAVs are also being used in some other areas, such as medical purposes including for medicine delivery, rescue operations, agricultural applications and so on. However, these UAVs can only fly in the sky, and they cannot travel on the ground for other applications. Therefore, in this paper, we design and present the novel concept-based UAV, which can also travel on the ground and rough terrain as an unmanned ground vehicle (UGV). This means that according to our requirement, we can use this as a quadcopter and caterpillar wheel–based UGV using a single remote control unit. Further, the current study also briefly discusses the two-dimensional (2D) and three-dimensional (3D) SolidWorks models of the novel concept-based combined vehicle (UAV + UGV), together with a physical model of a combined vehicle (UAV + UGV) and its various components. Moreover, the kinematic analysis of a combined vehicle (UAV + UGV) has been studied, and the motion controlling kinematic equations have been derived. Then, the real-time aerial and ground motions and orientations and control-based experimental results of a combined vehicle (UAV + UGV) are presented to demonstrate the robustness and effectiveness of the proposed vehicle.
Źródło:
Acta Mechanica et Automatica; 2022, 16, 3; 169--179
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł

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