ANALYTICAL FEASIBILITY STUDY OF THE AUTOMATIC CONTROL SYSTEM OF TILLAGE DEPTH

Abstract

The authors have carried out analytical studies on the development and rationalization of a system for automatic controlling the depth of tillage, a block diagram and an algorithm for a linear positional control system, as well as off ered a design scheme to develop a control algorithm. A mathematical model describing the control object that regulates the tillage depth has been determined, provided that the motion trajectory of the moving parts of the driving links and the actuator rods of the automatic system controlling the tillage depth is perfectly traced. A structural diagram of a linear system of positional control of the soil tillage depth has been developed, which is a mechanism for adjusting the support wheel with an acting disturbance on the control object, changing the distance between the O axis of the wheel rotation of the tillage machine power tool and the rotation axis of the support wheels of a soil cultivation machine. A design scheme to develop a control algorithm for changing the tillage depth has been obtained. To determine the required accuracy and modes of using hardware in various phase states of the soil layer, a basic set of hardware was identifi ed and analyzed to ensure that it meets the requirements for controlling the tillage depth of the working elements. They include a sensor for determining the penetration depth of the working element; microcontroller (setting and control of regulated force impact on the soil, i.e. vertical movement of the electric cylinder rod); electric cylinders (linear actuators). To test the developed algorithms for the functioning of the automatic control system for adjusting the travel depth of the working elements for presowing soil cultivation, it is necessary to conduct experimental studies in laboratory and production conditions.