1. METHOD OF JUSTIFICATION FOR PARAMETERS OF TRACTOR-IMPLEMENT UNIT WITH REGARDS TO THEIR IMPACT ON CROP PRODUCTIVITY.
- Author
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Khafizov, Camill, Nurmiev, Azat, Khafizov, Ramil, and Adigamov, Nail
- Subjects
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FARM tractors , *AGRICULTURAL equipment , *AGRICULTURAL productivity , *HARVESTING , *MATHEMATICAL models - Abstract
Topicality of the research: the value of the research is caused by the need to optimize main parameters of an agricultural tractor during its operation, taking into account their influence on the crop and the actual absence of such optimization methods. Purpose of the study: the purpose of the work is to develop an energybased mathematical model of a tractor-implement unit (later - 'unit') to identify the optimal parameters of the tractor, the width of the implement and the speed of the unit, which increase the efficiency in terms of energy costs. Research methods: the main research method is mathematical modeling based on system analysis, field experiments and computational simulations. Results of the research: the paper describes the proposed structure of the system under study, a justified criterion for optimizing the tractor parameters, and some interdependencies of the proposed energy-based mathematical model parameters. As a result of use of the theory of similarity and the organization of six-factorial experiment, dependence of the maximum pressure of a wheel of the tractor on the soil is received. It is revealed that with increase in the wheel size, the width of its profile decreases in a vertical load on the wheel, the maximum pressure of the wheel on the soil decreases. It is found that in the structure of total energy costs the major part is accounted for by the energy of the crop lost due to the impact of machinery and the optimality of the unit parameters (from 40 to 80 % depending on the type of operation, equipment used, operating conditions of units). Value: the proposed method of optimization of the main parameters of the tractor and unit will be useful in justifying the mass of the tractor and the power of its engine, both at the design stage of tractors and operations. The practical use of the research results benefits in a reduction of the total energy costs. The magnitude of reducing energy costs depends on the used tractors, agricultural machines and the conditions of their operation. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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