The article presents the results of experimental studies of the micro landform of the cutting area surface as a source of perturbing continuous oscillations of the sprung and unsprung masses of the logging machine. The substantiation of the expediency of studying the microprofile of forest support surfaces in the framework of this work is presented. The characteristic of the objects of the experimental study of the micro landform is given. A new measuring complex and the procedure for measuring geometric parameters of irregularities and slopes of the forest support surface of vehicles were proposed. The justification of the number of measurements in the planning of the experiment is given. As a result of data processing after approximation, normalized correlation functions and their approximation coefficients for the studied types of forest growing conditions were obtained. The obtained curves of normalized correlation functions have a decreasing character, which indicates the presence of a strong correlation on a small section of the length and differ in the steepness of the decline and the distance of the correlation, which varies from 1.8 to 11.6 m for different sections. The obtained approximation coefficients quantitatively characterize the perturbing effect of the irregularities of the natural surfaces of cutting areas of various types of forest growing conditions on the movement of logging machines.
Flexible manipulators are a promising executive tool in various technological complexes. In the process of collecting fruits, they can, in addition to their main task of delivering working bodies to the object of labor, also perform the functions of flexible guides. For the use of flexible manipulators in agriculture, namely in the operations of harvesting apples, developments are needed that are relatively cheap to manufacture in comparison with other flexible manipulators. To analyze the efficiency of apple picking using a flexible manipulator, a series of tests was carried out. As part of the tests, the process of picking apples was simulated using a flexible manipulator. The number of apples harvested for branches of various geometries was estimated. Within the framework of the discussion, the prospects of introducing a flexible manipulator in super-intensive gardens in Russia were assessed.
The paper provides a comparative analysis of the structure of energy consumption and production in the countries of the European Union and Russia. It is shown that Russia is a promising country for the effective development and implementation of renewable energy sources. A block diagram of a charging station for electric vehicles, which will be powered by photovoltaic panels, is proposed. Unclaimed electricity in this case can be sold to the external network or smooth the load curve of the nearest transformer substation.
In our country, at thermal and nuclear power plants, tower cooling towers built in 1960-1975 are still in operation. At the same time, the construction of new facilities and the modernization of existing installations requires a high-quality mathematical study of technical solutions. As part of the work, it is proposed to simulate the operation of a tower cooling tower, subject to additional forced air supply. Using the equations of heat and material balance for the cooling tower, a mathematical model of the operation of the cooling tower was developed in Microsoft Excel. The modelling of the operation of the cooling tower in the design conditions of the city of Yoshkar-Ola, as well as when installing additional fans of various capacities, has been carried out.
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