Vertical Oscillation Model of Sowing Machine Combined with Fertilization for Soybean

This study presents the result of building the vertical oscillation model of the conjugate machine (sowing machine combined with fertilization for soybean (G4B2 machine) and tractor). The fluctuations of special points on the conjugate machine are described graphically through numerical methods by Matlab software when the parameters of the stimulus function change, in two cases: the continuous stimulating function and the single stimulating function cosine form. The tractor has a four-link hinge knuckle at the back, when working in the free state, the G4B2 machine oscillation affected by tractor oscillation is very small. The point near the wheel of the G4B2 machine has a smaller amplitude of oscillation than the remote point.It is necessary to decrease the feeding speed when combining the machine through the rough ground with large amplitude (h0 > 0.15m) and small steps (S0 < 1.0m).