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Publications

Publications by José Miguel Almeida

2022

Feedfirst: Intelligent monitoring system for indoor aquaculture tanks

Authors
Teixeira, B; Lima, AP; Pinho, C; Viegas, D; Dias, N; Silva, H; Almeida, J;

Publication
2022 OCEANS HAMPTON ROADS

Abstract
The Feedfirst Intelligent Monitoring System is a novel tool for intelligent monitoring of fish nurseries in aquaculture scenarios, mainly focusing on monitoring three essential items: water quality control, biomass estimation, and automated feeding. The system is based on machine vision techniques for fish larvae population size detection, and larvae biomass estimation is monitored through size measurement. We also show that the perception-actuation loop in automated fish tanks can be closed by using the vision system output to influence feeding procedures. The proposed solution was tested in a real tank in an aquaculture setting with real-time performance and logging capabilities.

2022

Unmanned Aerial Vehicle for Wind-Turbine Inspection. Next Step: Offshore

Authors
Dias, A; Almeida, J; Oliveira, A; Santos, T; Martins, A; Silva, E;

Publication
2022 OCEANS HAMPTON ROADS

Abstract
Offshore wind turbine application has been widespread in the last years, with an estimation that in 2030 will reach a total capacity of 234GW. Offshore wind farms introduce advantages in terms of environmental impact (noise, impact on birds, disrupted landscapes) and energy production (34% onshore and 43% offshore). Still, they also introduce scientific challenges in developing methodologies that allow wind farm inspection (preventive maintenance) safety for humans. This paper presents a UAV approach for autonomous inspection of inland windturbine and describes the field tests in Penela, Portugal. From the state-of-the-art available wind turbine inspection, in 2015, we carried out the first autonomous inspection with a UAV. The inspection of wind blades offshore is an ongoing project; therefore, the paper also presents the preliminary results with a simulation environment to validate the 3D LiDAR and the inspection procedure with new challenges effects: floating platform, wind gusts, and unknown initial blade position.

1997

A hybrid feedback control system for a nonholonomic car-like vehicle

Authors
Almeida, J; Pereira, FL; Sousa, JB;

Publication
1997 IEEE INTERNATIONAL CONFERENCE ON ROBOTICS AND AUTOMATION - PROCEEDINGS, VOLS 1-4

Abstract
This paper addresses the design of a hybrid feedback control system enabling a car-like, rectangular vehicle to perform a tight L-shaped turn maneuver, This case constitutes an effort towards the definition of a general purpose methodology for hybrid feedback control synthesis. The design effort encompasses the synthesis of a set of modalities and mechanisms to detect relevant events enabling the overall motion coordination so that a global goal is attempted, Simulations of the implemented controller have shown a strong robustness with respect lo modeling uncertainty and execution errors.

2006

Simultaneous Control, Navigation and Target Tracking for Robotic Formations

Authors
Almeida, JM; Martins, A; da Silva, EP; Lobo Pereira, FM;

Publication
2006 IEEE International Conference on Multisensor Fusion and Integration for Intelligent Systems, Heidelberg, Germany, September 3-6, 2006

Abstract

2007

A Real Time Vision System for Autonomous Systems: Characterization during a Middle Size Match

Authors
Silva, H; Almeida, JM; Lima, L; Martins, A; da Silva, EP;

Publication
RoboCup 2007: Robot Soccer World Cup XI, July 9-10, 2007, Atlanta, GA, USA

Abstract

1997

On the design of a hybrid feedback control system for a nonholonomic car-like vehicle

Authors
Almeida, J; Pereira, FL; Sousa, JB;

Publication
ECC 1997 - European Control Conference

Abstract
This paper addresses the design of a hybrid feedback control system enabling a car-like, rectangular vehicle to perform a tight L-shaped turn maneuver. This case constitutes an effort towards the definition of a general purpose methodology for hybrid feedback control synthesis. The design effort encompasses the synthesis of a set of modalities and mechanisms to detect relevant events enabling the overall motion coordination so that a global goal is attempted. Simulations of the implemented controller have shown a strong robustness with respect to modeling uncertainty and execution errors.

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