This paper presents an approach developed to quantify the chaotic behavior for the characterization of electromechanical systems. A technique named Signal Analysis based on Chaos using Density of Maxima (SAC-DM) is presented. This technique uses a simple peak counting algorithm in the time domain of the current signal to detect faults. To demonstrate the potential of SAC-DM, an experiment is presented where a small BLDC motor at different speeds, with a regular and an unbalanced propeller. The results demonstrated that the SAC-DM was able to detect the speed of the BLDC motor in 99.16% of the cases, and to identify the unbalanced system in 99.79% of the cases, when the speed is at 50%.

A novel technique named Signal Analysis based on Chaos using Density of Maxima (SAC-DM) is presented to analyze Brushless Direct Current (BLDC) motors behavior. These motors are vastly used in electric vehicles, especially in Drones. The proposed approach is compared with the traditional Fast-Fourier Transform (FFT) and the experiments analyzing a BLDC motor of a drone demonstrates similar results but computationally simpler than that. The main contribution of this technique is the possibility to analyze signals in time domain, instead of the frequency domain. It is possible to identify working and faulty behavior with less computational resources than the traditional approach.

The Information Systems have great importance to support the processes of any business, establishing control in the operations and aiding in the decision making. Within this scope, this study aims to contribute with the assumption that the craftman entrepreneur should use information systems to have more control over his activities. Thus, the objective is to diagnose the knowledge about information systems in the professional reality of the craftman entrepreneurs of the state of Paraíba. As for the methodological strategy, questionnaires were applied to craftman who were present at the XXIII Craft Fair of Paraíba. The research made it possible to verify that most artisans do not have the qualification to use digital media, a digital education is required, it is also essential to provide means for access to information and tools that assist in the management of projects, even if in a simplified way , improving thus, the performance of the daily activities of these artisans.