Leonid Buhtoyarov

Voronezh State University of Forestry and Technologies Named after G.F. Morozov

The article analyzes the designs of various types of cultivators, which are used to remove unwanted herbaceous and tree-shrub vegetation. Cultivators with disk, rotary, milling and tine working bodies are considered. It is shown that quite a lot of material resources are spent on carrying out agro technical care for valuable forest crops. It is not...

An important technological operation in the care of forest crops is mechanized cutting of branches of unwanted vegetation. The working bodies used for cutting differ in design and energy costs for the cutting process. It is necessary to develop a methodology and conduct experimental studies of the process of cutting branches to select the working b...

The article proposes a method for quantitative assessment of the degree of conservation of the forest environment in clear felling during the operation of multi-operational machines, which uses a generalized mathematical model of schemes for the development of felling areas with strips parallel and perpendicular to the logging mustache. The relevan...

In the work for the study, a laboratory experiment was carried out using the developed stand for studying the opener of a forest seeder when interacting with the soil using an Arduino to find the optimal installation parameters on the unit. The experimental results of the study on the movement of the opener of a forest seeder along the laboratory c...

This work evaluates the tests of a 2 class tractor (integrated packaging LTZ -155) with front, rear, and combined aggregation, with the possibility of combining operations in the cultivation of row crops and forest plantations by using combined aggregates with forestry and agricultural vehicles with front and rear hinges. An assessment of the perfo...

Currently, the reforestation process has a number of disadvantages, such as the need to use manual labor during the distribution and planting of seedlings; mechanisms for planting seedlings are often equipped with tractors as traction means. The creation of furrows and the preparation of the soil immediately before planting affects the energy consu...

Modern unmanned aerial vehicles (UAV) can be effectively used for aerial sowing of forests. A feature of aerial sowing is the possibility of rapid reforestation at low costs, which is extremely important in the current environmental situation. The purpose of this study is to develop a set of sowing devices intended for use with UAVs. For this, the...

Brush cutters are used in forestry for the care of forest plantations in operations for cutting unwanted tree and shrub vegetation (TSV). Rotors can be used as working bodies. The rotor we are considering is a flywheel, on the outer sides of which the blades are hinged. When cutting DKR with blades, a cutting moment arises, which is transmitted thr...

The issues of studying the impact interaction of seeds with the soil environment by the method of discrete elements are considered. The main parameters of the used virtual stand are described and a brief description of the interaction model is given. As a result of the study, the depth of penetration of the seed, its displacement in the horizontal...

Simulation modeling allows researching a mechanism consisting of many links interacting with each other according to complex laws. In order not to write a model for each node of the investigated mechanism, it is advisable to use ready-made blocks of the Simulink application. To simplify the process of creating blocks responsible for the links of th...

Every year in all countries of the world there are natural disasters, including forest fires. Quality wood is lost. Today the problem is dealt with both by research teams and production companies. The article presents one of the methods for studying the throwing process and adjusting the adequacy of simulation models. The creation of an electromech...

To remove unwanted tree and shrub vegetation, it is necessary to use mechanized implements aggregated with traction means - tractors. The power consumption of the drive of these tools depends on their mass and the principles of the cutting process. Currently, mulchers, which are designed to grind felling residues with a diameter of tens of centimet...

The analytical modeling of multi-link mechanisms with a large number of degrees of freedom is a difficult task, therefore, it is advisable to use a simulation model Since it is planned to use a flexible working body on an area overgrown with vegetation, this will require a significant number of elements and, as a result, it will be very difficult t...

The interaction of resiliently fixed tillage tools and obstacles is investigated using computer applications that simulate the dynamics of motion of 3D models, created in CAD. The design of a virtual bench and a dynamometer block, implemented in CAD SolidWorks and an application for modeling the movement dynamics SolidWorks Motion, is described. Th...

The article presents a new comprehensive three-level concept for evaluating design decisions for performing processing operations on incomplete logging, which is distinguished by the ability to simultaneously predict energy costs, technical and economic results, and forestry and environmental consequences for the forest environment. To implement th...

Harvesters are state-of-the-art high-performance forestry machines that carry out a series of continuous operations, such as felling, pruning, and so on. During the alignment process of the harvester head to capture the trunk, the operator requires a large number of observations, judgments and multiple operations, which leads to loss of time and fu...

When caring for forest crops, it is necessary to prune the branches. Cutting of top branches is carried out in nurseries, removal of shrubs - on clearings, the formation of crowns - in forest shelterbelts. It is difficult for the operator to simultaneously control several hydraulic cylinders and maintain the required position of the working body. I...

A brief review of the methods used to simulate the interaction of soil-tillage tool is given. The EDEM Academic program was used to practically test the possibilities of using the discrete element method (DEM). A brief description of the physical models of this application used to simulate the interaction of the soil-tillage tool is given. To evalu...

There are significant tilts of the working body, clamping, hitting an insurmountable obstacle when the machine is working in the forest, due to the unevenness of the soil, stumps, and fallen trees. Therefore, circular saws and cutters often fail. Flexible working body is able to deviate from insurmountable obstacles, which increases the reliability...

The patterns of interaction between tillage tools and obstacles in forest soils (stumps, roots, stones) are important for the development of specialized forestry tools. They largely determine the type of a tool, tool geometry and modes of operation. In this study, the process of overcoming obstacles with a tillage tool using the method of multibody...

The method of calculation of specific power consumption of the process of cross sawing of wood with fan feed of chain cutting body proposed in the article is a complement to the theory of cutting. The mathematical model developed on its basis allows predicting reliably the energy efficiency of the chainsaw depending on the natural and industrial co...

When cleaning cutting, pruning of branches of roadside trees and shelter belt contour cutters are widely used, cutters is designed for total horizontal, vertical and oblique trimming crowns. These devices are hinged or removable ones and aggregated with wheeled tractors of traction class 0.6 to 1.4 kN, widespread in forestry. Improving the design o...

The theoretical analysis of dynamic phenomena in transmission tracked forest machine is much more difficult in the absence of experimental data on the effects of the input characteristic of the machine. The most characteristic species in the transmission effects that arise under real operating conditions allow to evaluate the results of experimenta...

The authors offer an automated drive design based on stepper motor which is mounted directly on the hydraulic control valve with manual control. This approach eliminates rework most of the hydraulic system, which significantly reduces the cost and the complexity of the process of modernization. When the drive was planning to use the medium-aided de...

Presented multifactor optimization for studying the simultaneous effect of several factors to find the optimal combination of factors that enable to accumulate as much energy per operating cycle of the mechanism of rotation of the manipulator column while reducing pressure spikes and fluctuations of the load when changing modes. On the basis of pre...

This paper offers a model of loading of the transmission elements at controlled curvilinear motion of the tracked timber harvesting machine. This model is based on evaluation of the effect of the external and internal factors on the loading of the tracked machine transmission. The main loads in the transmission result from the external action of th...

The research of multilink mechanism on the example of propulsor track harvester ЛЗ-5 was made. Propulsor of track harvester (CH) is a multilink mechanism, as it consists of track tracks, including a large number of tracks hingedly connected to each other. For research, we selected the program UM Tracked Vehicles, as it is most appropriate for the t...

Analytical description of the interaction between the tracks with soil is quite difficult, although to date the physical and mechanical properties of soils are fairly well understood. However, the application of the laws of soil mechanics to describe the interaction of track with soil is not acceptable because of loading dynamism of soil with eleme...

The analysis of the study of the dynamics of hydraulic drive of forest manipulators shows that work processes of column rotation mechanisms are accompanied by large dyna-mic loads that cause sudden changes of fluid pressure in the start-up and braking modes. The most effective are energy efficient hydro-pneumatic actuators of manipulator column tha...