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Articles 1 - 9 of 9

Full-Text Articles in Engineering

Control Applications: Driving Control Research?, Raúl Ordóñez Nov 2000

Control Applications: Driving Control Research?, Raúl Ordóñez

Raúl Ordóñez

No abstract provided.


A New Autonomous Underwater Vehicle For Imaging Research, C. Roman, O. Pizarro, R. Eustice, H. Singh Aug 2000

A New Autonomous Underwater Vehicle For Imaging Research, C. Roman, O. Pizarro, R. Eustice, H. Singh

Christopher N. Roman

Currently, unmanned underwater vehicles either tend to be cumbersome and complex to run, or operationally simple, but not quite suitable platforms for deep water imaging. This paper presents an alternative design in the form of a new low cost and easier to use autonomous underwater vehicle (AUV) for imaging research. The objective of the vehicle is to serve as a readily available and operationally simple tool that allows rapid testing of imaging algorithms in areas such as photomosaicking, 3D image reconstruction from a single camera, image based navigation, and multi-sensor fusion of bathymetry and optical data. These are all current ...


Modeling For E-Service Creation, Cécile Péraire, Derek Coleman Jun 2000

Modeling For E-Service Creation, Cécile Péraire, Derek Coleman

Cécile Péraire

No abstract provided.


Advances In Fusion Of High Resolution Underwater Optical And Acoustic Data, H. Singh, C. Roman, L. Whitcomb, D. Yoerger Apr 2000

Advances In Fusion Of High Resolution Underwater Optical And Acoustic Data, H. Singh, C. Roman, L. Whitcomb, D. Yoerger

Christopher N. Roman

We report efforts to merge data from the complementary modalities of optical and acoustic sensing for obtaining more accurate representations of the seafloor. We show that the principal obstacles to merging the acoustic and optical imaging modalities are the distortions inherent to each modality. The construction of geometrically accurate photomosaics is dominated by incremental errors arising as individual images are scaled and warped to form the photomosaic. For microbathymetric mapping, principal errors arise from sensor position and orientation calibration parameters that affect our ability to construct maps from sonar data that are commensurate with sensor and navigation resolution. We show ...


Modeling E-Service Based Systems, Cécile Péraire Mar 2000

Modeling E-Service Based Systems, Cécile Péraire

Cécile Péraire

No abstract provided.


Commande Vectorielle Indirecte D'Un Moteur À Induction Par Logique Floue, Boukhemis Chetate , Aissa Kheldoun Dec 1999

Commande Vectorielle Indirecte D'Un Moteur À Induction Par Logique Floue, Boukhemis Chetate , Aissa Kheldoun

Boukhemis Chetate

La commande vectorielle indirecte est actuellement la technique la plus utilisée pour contrôler la vitesse (ou la position) des actionneurs électriques à courant alternatif. Malheureusement les paramètres de la machine changent en raison de l'échauffement de ses parties ou à cause de l'interaction avec le mécanisme entraîné. Le présent travail, est consacré à l'application de la logique floue, d'une part, pour régler et adapter la constante de temps rotorique du moteur découplé par la technique à champ orienté et, d'autre part, en vue d'améliorer les performances correspondantes en cas de changement du moment d ...


Double, Triple, And Tetra-Brachial Flame Structures, Wei-Hsin Chen Dec 1999

Double, Triple, And Tetra-Brachial Flame Structures, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.


Combustion Hysteresis And Vaporization Interaction Of, Wei-Hsin Chen Dec 1999

Combustion Hysteresis And Vaporization Interaction Of, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.


Partially Premixed Flame Structure And Stability Of Twin Droplets In Flows, Wei-Hsin Chen Dec 1999

Partially Premixed Flame Structure And Stability Of Twin Droplets In Flows, Wei-Hsin Chen

Wei-Hsin Chen

No abstract provided.