To the Issue of Control Resonant Oscillations of a Vibrating Machine with Two Self-synchronizing Inertial Exciters

Abstract

In the present work, the features of dynamics of a vibration machine with two self-synchronizing vibration exciters of the asynchronous type under conditions of a variable arrangement of technological load on the machine’s working body are considered. A model of the vibration machine dynamics is presented, which takes into account the interaction of the mechanical part of the oscillating system with non-ideal vibration exciters and possible changes in the mass and position of the technological load on its working body. Based on the numerical simulation, the amplitude-frequency characteristics of the vibration machine model, as well as the speed and mutual phases of rotation of the vibration exciters debalances depending on the power supply frequency of the driving motors at different positions of technological load are investigated. It is shown that the shift of the technological load center of mass from the structural axis of symmetry of the machine leads to a change in the resonant frequencies, as well as to a change in the mutual phasing of the debalances and the system’s oscillations modes near the resonant frequencies. The influence of the direction of the weight’s center of mass displacement on the mutual phasing of the debalances rotation is established. The results obtained can be used in developing resonant vibrating machine’s control systems to establish the corrective values ​​of the power supply frequency of vibration exciters in the event of an uncontrolled displacement of the technological load.