Publications

Publications by CRAS

2011

Experiment@Portugal

Authors
Restivo, MT; Alves, JC; Cardoso, A;

Publication
iJEP

Abstract

2011

REFLECT: Rendering FPGAs to Multi-core Embedded Computing

Authors
Cardoso, JMP; Diniz, PC; Petrov, Z; Bertels, K; Hübner, M; van Someren, H; Gonçalves, F; de Coutinho, JGF; Constantinides, GA; Olivier, B; Luk, W; Becker, J; Kuzmanov, G; Thoma, F; Braun, L; Kühnle, M; Nane, R; Sima, VM; Krátký, K; Alves, JC; Ferreira, JC;

Publication
Reconfigurable Computing

Abstract

2011

Experiment@Portugal

Authors
Restivo, MT; Alves, JC; Cardoso, A;

Publication
International Journal of Engineering Pedagogy (iJEP) - Int. J. Eng. Ped.

Abstract

2011

Custom FPGA-based micro-architecture for streaming computing

Authors
Alves, JC; Diniz, PC;

Publication
Proceedings of the 2011 7th Southern Conference on Programmable Logic, SPL 2011

Abstract
This paper describes a micro-architecture for a custom programmable FPGA-based processor, with direct support for streaming and vector computations relying on custom cache memory storage. The processor combines a custom data-path with several parallel data ports for accessing operands in streaming mode thus efficiently supporting nested looping constructs found in high-level languages while mitigating the impact on external memory bandwidth. The architecture leverages the strided access patterns of streaming data access using a microcoded sequencer with multi-dimensional nested looping capability. We present synthesis results for the main components of the architecture on a Xilinx's Virtex-4 FPGA device. The results reveal the architecture to be extremely flexible and consume few FPGA resources. © 2011 IEEE.

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2011

Fault Tolerant Depth Control of the MARES AUV

Authors
Ferreira, B; Matos, A; Cruz, N;

Publication
Challenges and Paradigms in Applied Robust Control

Abstract

2011

TriMARES - a Hybrid AUV/ROV for Dam Inspection

Authors
Cruz, NA; Matos, AC; Almeida, RM; Ferreira, BM; Abreu, N;

Publication
OCEANS 2011

Abstract
This paper describes the full development process of TriMARES, a hybrid AUV/ROV designed to fulfil the requirements of a consortium for the inspection and periodic monitoring of a large dam reservoir. The demand of robotic systems for underwater operations is growing exponentially and there are many scenarios for which the commercial solutions are not adequate. Such was the case with TriMARES, where it was possible to take advantage of previous designs to achieve a custom solution in a short time. We describe the initial requirements for the underwater system, we present the main solutions adopted for the vehicle subsystems, and we provide some data from the first in-water tests, performed only 6 months after the beginning of the project.

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