5 documents found, page 1 of 1
Systematic review of predictive maintenance practices in the manufacturing sector
Benhanifia, Abdeldjalil; Cheikh, Zied Ben; Oliveira, Paulo Moura; Valente, Antonio; Lima, JoséPredictive maintenance (PDM) is emerging as a strong transformative tool within Industry 4.0, enabling significant improvements in the sustainability and efficiency of manufacturing processes. This in-depth literature review, which follows the PRISMA 2020 framework, examines how PDM is being implemented in several areas of the manufacturing industry, focusing on how it is taking advantage of technological advan...
High-resolution portable bluetooth module for ECG and EMG acquisition
Luiz, Luiz E.; Soares, Salviano; Valente, Antonio; Barroso, João; Leitão, Paulo; Teixeira, João PauloPortable ECG/sEMG acquisition systems for telemedicine often lack application flexibility (e.g., limited configurability, signal validation) and efficient wireless data handling. A modular biosignal acquisition system with up to 8 channels, 24-bit resolution and configurable sampling (1–4 kHz) is proposed, featuring per-channel gain/source adjustments, internal MUX-based reference drive, and visual electrode in...
Nonlinear control of mecanum-wheeled robots applying H∞controller
Chellal, Arezki Abderrahim; Braun, João A.; Lima, José; Gonçalves, José; Valente, Antonio; Costa, PauloMecanum wheeled mobile robots have become relevant due to their excellent maneuverability, enabling omnidirectional motion in constrained environments as a requirement in industrial automation, logistics, and service robotics. This paper addresses a low-level controller based on the H-Infinity (H-infinity) control method for a four-wheel Mecanum mobile robot. The proposed controller ensures stability and perfor...
Digital sound processing using arduino and MATLAB
Silva, Sergio; Soares, Salviano; Valente, Antonio; Marcelino, Sylvain T.Over the last decade, impelled by the huge open source software community support, the low cost Arduino platform presents itself as an alternative for digital sound processing. Although Arduino is generally used for small applications for the artistic and maker community, its built-in Analog to digital converter can be used for sound capturing, processing and reproduction. Equipped with a powerful AVR 8 bit RIS...
A escrita espelhada como manifestação do pensamento pré-operatório.
Valente, AntonioEsta comunicação foi apresentada, originariamente, no I Congresso Brasileiro Piagentino, realizado no Rio de Janeiro em setembro de 1980. Desde a época em que foi escrita, não realizamos outras investigações sobre o assunto. A razão de publicá-la tem, inclusive, a intenção de permitir que outros pesquisadores, por venturas interessados no tema, prossigam as investigações neste sentido.