Ecole Nationale de l'Aviation Civile
Toutes les publications de l'ENAC en direct.
All ENAC publications.
The wide catalogue of planners enables mission-planning solutions to be tailored to assumptions made on the environment and user needs. However, in robotics, the execution of plans and policies created by these planners is not always straightforward, because autonomous robots deployed in open and dynamic environments undergo fluctuating environmental conditions, partial information, and uncertain execution times. On top of bare engineering issues, planner integration and usability requires reliable and verifiable execution frameworks. We propose AMPLIFIED, a complete toolchain to plan and execute in complex environments, with the goal to assess the quality of the...
<div><p>We study nearly Sasakian statistical manifolds endowed with dual affine connections satisfying a gauge equation. We derive algebraic characterizations of the nearly Sasakian condition and examine their implications for statistical submanifolds and submersions. We also introduce an algebraic curvature tensor naturally associated with the induced product and establish a Bianchi-type identity for this tensor.</p></div>
We address sparse approximation problems. We propose an original continuous-optimization formulation and build on such a formulation to develop a method to obtain near-optimal global solutions.
<div><p>Air Traffic Flow Management (ATFM) tactical measures, such as imposing acceptance rates and calculated take-off times, rely on information sharing and collaboration across Air Traffic Control sectors. In decentralized systems, such as those in Southeast Asia, this collaboration poses significant challenges, often limiting tactical measures to implementation within individual Flight Information Regions (FIRs). This paper presents the development of simulation capabilities to analyze such decentralized ATFM systems, where FIRs operate independently. We propose a comprehensive suite of mathematical models and algorithmic frameworks specifically designed for...
Le projet IPaTRo (« Paradigme d’interaction pour la robotique de téléprésence »), a pour objectif de concevoir, mettre en œuvre et évaluer des systèmes de téléopération de robots de téléprésence déployés chez les familles d’enfants hospitalisés, afin de renforcer le lien entre les enfants et leurs familles et de réduire le sentiment d’isolement. Ce projet s’appuie sur une application concrète dans le Centre Hospitalier Universitaire de Toulouse, qui rencontre actuellement certaines difficultés en matière d’interface et de matériel. Afin de pallier les limites du robot actuellement utilisé et en nous appuyant sur la base du Turtlebot 4, nous avons conçu un robot respectant...
Cet article explore comment répondre à la question : “Qu’est-ce qu’une technique d’interaction?” par une vision des techniques d’interaction comme des essences techniques appartenant à des lignées. Dans cette approche, l’évolution technique est considérée comme issue d’interactions entre des opérations d’invention et des possibilités d’évolution de schèmes techniques doués d’un fonction- nement propre. L’article explore les hypothèses des deux côtés. Il présente d’une part les dimensions possibles de ces opérations créatives, à travers des interviews de programmeurs et une expéri- mentation menée sur le codage de la fonction de transfert dans les techniques de pointage...
Positioning solutions based on global navigation satellite systems remain vulnerable to local multipath and non-line-of-sight conditions, a challenge for autonomous systems that must operate reliably across diverse environments. To support context-aware navigation, we quantify pseudorange multipath effects across four environmental settings: canyon, urban, trees, and open sky. Given a known receiver position, the range-free double difference (RFDD) can be used to isolate multipath errors. We propose a refinement accounting for clock biases in a commercial off-the-shelf receiver, which otherwise distort geometric range estimates-a key input to the RFDD. Applying our method...
<div><p>SupaeroMoon is a student club founded in 2023 at ISAE-SUPAERO, an aerospace-engineering school in Toulouse, France. This contribution outlines the challenges facing new student projects, our past work, and future plans. Planetary robotics are evolving rapidly in multiple domains, opening new opportunities but challenging educational institutions to keep up. While recent projects focus more on crewed missions to the Moon and beyond, the need for robots and robot-human teaming remains undisputed. This motivated the creation of the student team SupaeroMoon, focusing on in-situ 3D-printable and modular robotics. SupaeroMoon was the sole French team to participate in...
Future liquid rocket engines tasked to propel space launchers are expected to satisfy new industry needs. Chiefly among them, reusability. Vertically landing a rocket stage requires re-lightable and high-performance engines, capable of working across wide ranges of thrust. Such deep-throttlable engines may need to work at both super-and subcritical chamber pressures (above and below the critical pressures of the injected propellants). The formation of two separate liquid and vapor phases in the subcritical cases may influence the thermoacoustic stability of the engine. A Large Eddy Simulation (LES) model capable of simulating both sub-and supercritical load points is...
La programmation d’interfaces graphiques (GUIs) repose encore essentiellement sur l’utilisation de boîtes à outils de programmation mettant à disposition différents composants interactifs (widgets). Néanmoins, modifier les comportements prédéfinis de ces compo- sants comme ajouter des signifiants, des feedbacks ou des feedfor- wards est difficile et nécessite d’avoir accès au code source ou de trouver des moyens de contournement. Face à ce problème, nous proposons Bridget, une bibliothèque TypeScript facilitant la modifi- cation des comportements de ces composants interactifs. Pour cela, Bridget permet de décrire des comportements interactifs puis de les attacher aux...
