optimization and onera

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Aerodynamic and Aero-Acoustic Optimization of Modern Tilt-Rotor Blades Within the ADYN Project

Among the funded projects that aim at developing a new concept of tilt-rotors, the pre-competitive ADYN project (Advanced European tilt-rotor for Dynamics and Noise) has the objective to study the dynamic and acoustic problems of the ERICA concept proposed by AGUSTA. This paper presents the work package 3 (WP3) of...

Tags: Optimization, ONERA

White papers 2004-09-09

On the Refinement of Discretization for Optimal Control Problems

In the frame of future launcher design studies, this paper gives possible improvements of tools and methods for trajectory optimization. Trajectory optimization of reusable launch vehicle RLV is a very complex task calling for a versatile tool, which should be able to address - either simultaneously or separately - ascent...

Tags: ONERA, Ascent, Optimization, Tool, Productivity

White papers 2004-06-24

Experimental Validation of Composite Material Structure Optimization by Genetic Algorithm

This paper presents in detail the optimization strategy as well as experimental results obtained on stacking sequence optimization of composite plates and blade models subjected to combined loads with respect to ply continuity. Experiments also shown that some numerical and manufacturing problems can occur, and suggest improvements which will have...

Tags: ONERA, Algorithm, Optimization, Manufacturing

White papers 2004-06-22

Multi-Disciplinary Optimization of a Supersonic Transport Aircraft Wing Planform

A Multi-Disciplinary Analysis and Optimization MDAO system for the evaluation and optimization of the performance of a High-Speed Civil Transport Aircraft has been developed at ONERA within the context of the CISAP project. This paper first describes the MDO system implemented at ONERA. This MDO system is constructed by coupling...

Tags: ONERA, Optimization, Aircraft, Model Driven Architecture, Ooa/Ood/Oop, Software Development, Software/Web Development

White papers 2004-04-26

Tasks for Improvement in Ground Vibration Testing of Large Aircraft

This paper gives the industrial requirements for ground vibration tests GVT on large aircraft, firstly taking into account technical difficulties due to the high modal density in the very low-frequency range and secondly time reduction of such tests. Considering the finite element model to be treated, two optimizations can be...

Tags: Aircraft, Aerospace & Defense, Manufacturing, ONERA, Optimization

White papers 2001-08-21

Additional Resources

Storm warning: the Dassault Rafale is poised to become Europe's premier fighter-bomber.(Cover Story)

France's Rafale is the most capable aircraft of the three new-generation fighters developed in Europe over the last two decades. Although the Dassault Rafale, Eurofighter Typhoon, and Saab Gripen are all currently being developed as multirole aircraft, only in the case of the...

Articles 2005-06-01

France pursues optical stealth program.(EUROPEAN REPORT)(Brief Article)

On November 7, France's military-procurement agency awarded a $27-million contract to EADS for the design, production, and operation of the Moyen Aeroporte de Mesures Optroniques MAMO airborne test platform airborne optronic measurement facility. The main purpose of the program is to conduct exact...

Articles 2004-01-01

Bigger, faster, more: demand for heavy duty computing power is perpetually increasing, but computer manufacturers disagree about the way the hunger will be satisfied in the future. (Computing).

THE world's fastest supercomputer, capable of more than 12 trillion calculations per second (12 teraflops), is being installed by the US Energy Department to simulate the explosions of nuclear bombs. The nuclear test ban moratorium is forcing the pace in high performance...

Articles 2000-09-01

A quarter-wavelength antenna with superposed square patches.

This article proposes a method whereby the cross-sectional area of microstrip antennas using superposed square patches is decreased while the bandwidth is increased. The quarter-wavelength antenna principle is applied, however, the short circuits are located between two square superposed elements. The structure is completely metallic...

Articles 1998-06-01