Design of Mathematical Model of Main Working Parts of Grain Combine Harvester

Abstract

In order to improve the working efficiency of the grain combine harvester, this paper decomposes the harvester into three parts: the power system, the walking system and the operating system. The paper determines the matching relationship between engine power and driving speed, corn harvesting speed, peeling speed and threshing speed. This paper determines the mathematical model of the main working parts by establishing a matching relationship. Based on the mathematical model, this paper designs the harvester simulation model by using Matlab and simulink software tools. In this paper, the effects of engine power simulation parameters on the speed, threshing and harvesting speed of the harvester in the mathematical model are studied. The results show that the harvester power increases, the walking speed of the harvester increases, the harvesting speed increases, the speed of corn peeling and threshing increases, and the loss of corn in threshing and clearing increases. The mathematical model of the harvester is very high and belongs to the large inertia system.