Modeling of oscillatory system coulter - soil

This article presents the results of theoretical studies of the effect of fluctuations on the quality of planting flax seeds. Sustainable operation of a designed executive subsystem is determined by the method of structural studies of the dynamic state of their interaction. The method is based on the known position that the nonstation- ary oscillations of parametric systems are non-trivial solutions of the variational system with the center corre- sponding to particular solutions of systems. This method involves the determination of the areas of external relations of the frequency and natural vibration frequencies to ensure their sustainable operation. To improve the stability of the stroke depth of working bodies, on the basis of the methodology of the analysis and synthesis of the executive subsystems of agricultural machines with frequency control of their workflow, identified common patterns of dynamic teamwork of subsystems that provide a limited steady pace energy supply. The conducted research lead to the conclusion that under the existing structure of a coulter group the frequency of free oscillations k is equal to 3 с-1. And in the range of ω λ - 1-4 Hz resonance phenomena occur in the subsystems of stroke depth. This greatly disturbed the uniformity of their stroke, which is evident from the uniform distribution of seeds on depth К с. As can be seen, it is unrealistic to reduce the natural oscillation frequency k or ω 0 of coulter and uneconomical as well (fuel consumption will increase because of too much coulter weight). The most effective way is to increase the natural frequency of the vibrational system by increasing the stiffness of the spring and to reduce the incidence ω λ of external loads, in particular to use dynamic frequency limiters. Therefore, reducing the impact of external loads can be achieved by connecting two coulters on the same link, thereby in- creasing the weight of the oscillating system (the opener). Increasing the stiffness of the spring has led to an in- crease in the frequency of free oscillations k, and to increase of the uniformity of the distribution on the seed depth К с. But this raises the problem of coulters retention at a given depth, it is proposed to apply skilike coulter stroke limiters.