Principles of research of soil ped deformation at interaction with machine working element

Abstract

Working elements of machines constantly or pulsewise interact with some of objects in raw materials with a difficult configuration (a root or tuber crops, vegetables, fruit, grain, soil peds) when performing technological operations in agricultural production. Expression of mechanical system by mathematical functions is needed to describe analytical such interaction. However, there are no universal methods of the description of various surfaces limited by quantity of ratios, except for spherical, cylindrical or ellipsoidal. The authors established the principles of research of deformation behavior of elements of mechanical systems described by a set of variable parameters. Physical model of the soil consisting of spherical peds was usd for this purpose. The authors gave the principles of numerical research of deformation behavior of a spherical soil ped under the influence of a disk working element of the soil-cultivating tool at change of a high number of parameters. Research of systems of analytical models of the second order with variable coefficients in partial derivatives with a set of input and output parameters can be effectively realized by numerical methods with use of the special varargin and varargout functions. Besides, theoretical value of deformation of the soil ped can be determined by numerical methods of MatLab system with use of the developed software. It is necessary to compare the limit value of deformation of the soil ped defined in laboratory conditions with theoretical one and to establish required kinematic and design data of a disk working element and the soil-cultivating tool.

Keywords

• сельхозмашины
• механическая система
• дисковый рабочий орган
• аналитическая модель
• множество переменных параметров
• agricultural machines
• mechanical system
• disk working element
• analytical model
• variable parameter set