scholarly journals Kinematic scheme of manipulator for the removal of unwanted trees and shrubs in plan of the row of railways

2015 ◽  
Vol 5 (3) ◽  
pp. 228-233
Author(s):  
Платонова ◽  
Marina Platonova ◽  
Драпалюк ◽  
Mikhail Drapalyuk ◽  
Платонов ◽  
...  
Keyword(s):  
Kinematic Scheme ◽  
Process Technology ◽  
Railway Network ◽  
Trees And Shrubs ◽  
Base Vehicle

This article discusses the layout of manipulators designed to move the working body according to a given process technology, taking into account the appropriateness of their use, which is caused by the type of the base vehicle, the type of unwanted vegetation and especially its growth, in terms of terrain and profile strip of tap railways. The question of the layout of the manipulator to allow movement of the base vehicle both on public roads and railway network, taking into account the established restrictions on the dimensions of movement.

The mathematical model of the interaction of the rotary of the working body with trees and shrubs, and stumps

2016 ◽  
Author(s):  
А.А. Платонов ◽  
М.А. Платонова
Keyword(s):  
Higher Plants ◽  
Contact Point ◽  
Interaction Model ◽  
Negative Consequences ◽  
Railway Network ◽  
Actual Problem ◽  
Railway Infrastructure ◽  
Input Parameters ◽  
The Mathematical Model ◽  
Trees And Shrubs

В настоящее время по сети железных дорог России продолжает оставаться актуальной проблема удаления нежелательной древесно-кустарниковой растительности с полосы отвода. Неоспоримые отрицательные последствия наличия нежелательной растительности на объектах инфраструктуры железных дорог вызывают необходимость проведения мероприятий по предупреждению появления и искоренению высших растений с целью обеспечения бесперебойности и безопасности перевозочного процесса в целом. С учетом этого в 2014 г. в рамках исследования кинематики и динамики малозвенных механизмов лесных машин моделировалось взаимодействие роторного рабочего органа, управляемого манипуляторной установкой, с нежелательной древесно-кустарниковой растительностью и пнями. В работе показано, что при математическом моделировании манипулятор рассматривался как сложная система, обладающая большим количеством параметров и погруженная при этом в среду с целой совокупностью параметров, не являющихся частью разрабатываемой системы. На основе анализа рабочего процесса удаления нежелательной древесно-кустарниковой растительности были определены кинематические характеристики перспективных схем манипуляторов, в частности, аналитические зависимости максимального и минимального радиусов рабочей зоны от ряда входных параметров, а также получен ряд графических зависимостей. При составлении обобщенной динамической модели взаимодействия роторного рабочего органа с порослью и пнями установлена аналитическая зависимость отклонения точки контакта поросли под воздействием резца ротора в направлении его вращения от ряда входных параметров. Сделан вывод о перспективах проведенных аналитических исследований, позволяющих получить ряд важнейших практических рекомендаций не только для рассмотренной системы манипулятора и роторного рабочего органа, но и для целой системы машин, обладающих определенными общими свойствами. At present, the Russian railway network continues to be the actual problem of removing unwanted trees and shrubs from the strip withdrawal. The undeniable negative consequences the presence of unwanted vegetation on the objects of the railway infrastructure is the need for measures to prevent and eradicate the appearance of higher plants in order to ensure for uninterruptible and secure of the transportation process as a whole. With this in mind, in 2014 in a study of kinematics and dynamics few detailed mechanisms of forest machines modeled the interaction of the working body of the rotor controlled manipulator, with unwanted trees and shrubs, and stumps. The work shows that at mathematical modeling the manipulator considered by as a complicated system with a large number of parameters and at the same time immersed in an environment with a whole set of parameters that are not part of the developed system. Based on the analysis the workflow removing unwanted trees and shrubs have been identified kinematic characteristics of promising schemes of manipulators, in particular analytical dependences of the maximum and minimum radii of the working area from a number of input parameters, and obtained a number of graphic dependences. In compiling the generalized dynamic interaction model rotary working body with shoots and the stumps installed analytical dependence of the deviation of the contact point shoots under the influence of the cutter in the direction of rotor rotation from a number of input parameters. The conclusion is made about the prospects of conducted analytical studies to obtain a number of important practical guidance not only for the consideration of the rotary arm and the working body, but also for the whole system of machines that have certain common properties.

Microstructural characterization of sol-gel coating on PET films

1994 ◽  
Vol 52 ◽  
pp. 886-887
Author(s):  
R. T. Chen ◽  
R.A. Norwood
Keyword(s):  
Ion Beam ◽  
Sol Gel ◽  
Industrial Applications ◽  
Hard Coatings ◽  
Nanometer Scale ◽  
Ion Beam Sputtering ◽  
Process Technology ◽  
Refractive Index Measurement ◽  
Organically Modified ◽  
Pet Films

Sol-gel processing has been used to control the structure of a material on a nanometer scale in preparing advanced ceramics and glasses. Film coating using the sol-gel process was also found to be a viable process technology in applications such as optical, porous, antireflection and hard coatings. In this study, organically modified silicate (Ormosil) coatings are applied to PET films for various industrial applications. Sol-gel materials are known to exhibit nanometer scale structures which havepreviously been characterized by small-angle X-ray scattering (SAXS), neutron scattering and light scattering. Imaging of the ultrafine sol-gel structures has also been performed using an ultrahigh resolution replica/TEM technique. The objective of this study was to evaluate the ultrafine structures inthe sol gel coatings using a direct imaging technique: atomic force microscopy (AFM). In addition, correlation of microstructures with processing parameters, coating density and other physical properties will be discussed.The materials evaluated are organically modified silicate coatings on PET film substrates. Refractive index measurement by the prism coupling method was used to assess density of the sol-gel coating.AFM imaging was performed on a Nanoscope III AFM (by Digital Instruments) using constant force mode. Solgel coating samples coated with a thin layer of Ft (by ion beam sputtering) were also examined by STM in order to confirm the structures observed in the contact type AFM. In addition, to compare the previous results, sol-gel powder samples were also prepared by ultrasonication followed by Pt/Au shadowing and examined using a JEOL 100CX TEM.

Manchoukuo Completes Strategic Railway Network

1937 ◽  
Vol 6 (7) ◽  
pp. 79-80
Author(s):  
J. R. S.
Keyword(s):  
Railway Network

Жизненное состояние древесных насаждений в условиях города Актобе (Казахстан)

2017 ◽  
Vol 7 (4) ◽  
pp. 51-55
Author(s):  
S. A. Abiev ◽  
S. A. Aipeisova ◽  
N. A. Utarbaeva
Keyword(s):  
Urban Area ◽  
Woody Plants ◽  
Health State ◽  
Urban Habitats ◽  
Resistant Species ◽  
Vital State ◽  
Ulmus Laevis ◽  
Urban Conditions ◽  
The City ◽  
Trees And Shrubs

<p>The purpose of our work is to assess the health state of woody plants growing in different habitats of the city of Aktobe. We have studied the health state of arboreal and shrubby plants growing in various urban habitats; the survey was conducted during 2016-2017 by route-visual method. We performed the analysis of species diversity, abundance and density in urban area. The assessment of health state of the trees was made according to V.A. Alekseev. From your data and literature review we established that such species as Ulmus pinnato-ramosa, Acer negundo, Populus tremula, Populus nigra, and Syringa vulgaris have strong winter resistnce in the territory of Aktobe; we registered that only their apex buds and emds of the shoots were frozen in severe winters. The medium-resistant speices include Ulmus laevis and Acer platonoides. They are less plastic and suffer from late spring and early autumn frosts. The Amorpha fruticosa, Vitis vinifera, and Parthenocissus guinguefolia could be considered as the non-resistant species, since they usually freeze up to the snow cover line. The analysis of the vital state made it possible to assess the resistance to urban conditions of the majority of trees and shrubs registered in urban habitats of Aktobe. According to the preliminary data, the origin of the plant and its winter resistance are of main importance when introducing new species to urban area.</p>

Sign in / Sign up

Export Citation Format

Share Document