Mitkov V. Substrantiation of circuit and parameters of unit for primary tillage.

3.Object is the process of operation of combined MTA which consists of the tractor, the frontal plant residues cutter and rear mounted plough as whole dynamic system. Purpose is to decrease specific fuel consumptions and increase the technical, economic and quality indicators of cutting and ploughing MTA by a substantiation of its scheme and design parameters. Methods. The choice of the scheme and parameters of cutting and plugging MTA which was realized analysis on PC the obtained mathematical dependences and was based the points of the theoretical mechanics, theories of automatic control, probability and mathematical statistics. Novelty. The technique of a substantiation of the width and speed of the combined aggregate was developed, with the help of use of partial derivatives. The mathematical model which enables to estimate the effect of the scheme and parameters of cutting and plugging MTA on the smoothness of its move in a longitudinal - vertical plane is improved. The regularities of the effectof a longitudinal profile oscillations of the soil fertility and also power of pulling, controlled and quality indicators of cutting and ploughing MTA are gained. Results. Practical recommendations for the adjustment of cutting and ploughing MTA which are introduced in an experimental farm of Southern branch NTS "IMESG" UAAN. Are developed the Kharkiv tractor plant and Tavria State Agritechnical Academy also use these practical recommendations. Brunch is the farm production.