The forecast of the AGV battery discharging via the machine learning methods

Abstract

We reviewed the existing and currently used approach in processing the residual charge of an AGV battery. The method of setting up the experiment for collecting the historical data for an AGV Formica 1 of the AIUT company was proposed and implemented. The collected properties of the time series were analyzed and the algorithm for the necessary data pre-processing was selected. This algorithm includes padding any the suppression spontaneous peaks, the recovery of any lost data and data normalization.The collected data for the AGVs were also analyzed using the correlation analysis methods (Pearson, Spearman and Kendall correlations). These determined the parameters on which the AGV battery discharge depends. A battery discharge prediction approach that is based on the quasi-stochastic signal's probabilistic characteristics is suggested.A Multiparameter ANN model using a time window was developed. The dependence of the forecast error on the length of the time window was also investigated. The optimal parameters of the ANN were selected experimentally. The mean absolute percentage error for the AGV short-term forecast of a battery discharging was less than 1%. For the other parameters on which it depends, the AGV battery discharging was less than 9%. All of the studies were conducted within the framework of the "Automated Guided Vehicles integrated with Collaborative Robots for Smart Industry Perspective" project.