2nd International E-Conference on Engineering, Technology and Management - ICETM 2020
Author(s) : Dzanko Hajradinovic, Ivana Kovacic, Miodrag Zukovic
A vibro-impact system driven by an DC electric motor is analyzed. The vibro-impact system is consisting of a crank-slider mechanism and one oscillator attached to it. Oscillator can impact in a fixed wall. The impact model has been assumed as inelastic, causing the change of velocity in sign and intensity by the restitution factor. Mathematical model which describes this system is a coupled system of second order nonlinear differential equations. The aim is to determine the influence of the stall torque on the motion of the oscillator. The system of differential equations is solved numerically. The results of the analysis are summarized in diagrams which are showing the relationship between the stall torque and the maximum amplitude of the oscillator movement, and the average value of excitation frequency of the electric motor. Frequency response diagram is also formed. Based on the diagrams regions of impact and non-impact solutions are distinguished, and regions with multiple solutions. For four different values of the stall torque displacement diagrams and the excitation versus time diagrams are shown.