A new concept of vibration

The article reviews the technical solution applied to these machines which are currently in use worldwide. Special attention is paid to the new concept of a cutter drum powertrain system, where the permanent magnet technology motors are proposed. Placing them inside the cutting drum results in improved dynamic performance of the mining process, as well as the possibility of modular configuration depending on the required operating condition. The authors analysed the dynamics of mining in continuous miner machines, where the adverse impact of vibrations during this process was noticed. The reason for this problem is the occurrence of resonance frequencies in the structure of the machine, which significantly shortens its life time. In previous publications, approaches based on avoiding resonance and adjusted shape modes to reduce displacement of cutter drum were presented. One of the ways to achieve this effect is to control cutter drum’s angular velocity. It allows thinking about a new concept of vibration-control system based on smooth speed change of the cutter drum or/and the angular speed of the boom