Mitigation of torque signal fluctuations in wear rig using digital filters and motor alternatives

Abstract

In current modern industries, maximizing the lifespan and efficiency of machines is of a great importance to companies. A key factor in doing this is by understanding how different material influence the wear and performance on the machines. This is very important for Comminution Reimagined Sweden (CRS) since they work with machines that will experience change of material depending on where their machines are placed. To understand the effect of the material interactions, a torque sensor is used to gather data. That data is later on used for energy calculations. As of now, the torque signal is fluctuating in amplitude suspiciously much and this report investigates methods for reducing these torque fluctuations for CRS wear rigs, using digital filters and alternative motors as solutions. By analyzing frequencies and identifying the sources of these fluctuations, more precise solutions can be discovered. Various motors and digital filters are compared, to try and find a suitable solution to these fluctuations. The result of these studies indicates that a more suitable motor and digital filter in combination could significantly reduce the torque fluctuations. No real test have been done where a new motor and digital filter have been implemented and tested. The study therefore aims to provide a guidance for CRS on how future implementations can enhance the reliability of the torque signal.