Air & Space Europe最新文献

The development of the MDO approach presented in this paper is based on extensive programmes of research undertaken in the aerospace sector. Some of this work has resulted from in-house development of systems to support the creation of actual production aircraft of which references (1) and (2) are typical examples. Other studies have focused on the development of methods to support the application of MDO using a variety of optimisation approaches mainly in the conceptual or early preliminary design phases (2–6) and in the opportunities provided by large scale computing (7). The most detailed application for a realistic aircraft component was undertaken in an earlier EU funded research programme (BE95-2056) reported in references (8,9) with potential developments of this work explored in (10). However, the concept of creating a system able to fully cover the total design process and to include the concept that the teams involved are distributed has not been previously considered and is the focus for the MOB project.

One of the major problems that challenge today's aeronautics is the problem of improving flight safety. A zone of increased hazard is the aerospace in the vicinity of an airport. Here, one of aircraft accidents' causes is wake turbulence generated by aircraft. The encountering of an aircraft on take-off or landing with the vortex wake of a preceding aircraft can lead to an accident especially dangerous near the ground.

Within the frame work of Brite-Euram programme CRASURV ‘Commercial Aircraft — Design for Crash Survivability’, technology is being developed for the design of composite air frames with respect to crashworthiness. A significant part of the project consists of the design, fabrication and drop-testing of two representative composite fuselage sections, to generate the experimental data needed for the validation of new energy absorbing structural concepts, validation of simulation tools to model and analyse these structures subjected to crash loads.

Research in normal operational environments indicates that the formal requirements for the aircraft maintenance system are frequently not fully or effectively implemented in practice. This gives rise to a pervasive ‘double standard’ with no effective means of reconciling official and unofficial operational practice. A systems strategy for human-centred management in aircraft maintenance is being developed in a number of European projects, which address issues of design, planning, operational practice, monitoring, change and competence.

In this paper a brief overview of the aircraft icing problem and EURICE project structure, objectives, results and exploitation of results will be presented. The EURICE project is part of the EC Fourth Framework Programme (research and technological development programme for the years 1994–1998).

This paper provides an overview of the aeronautics sector in Greece in its present status and its perspectives in a rapidly changing environment. It briefly makes a reference to the background which is important for understanding the factors that shaped the sector's development and describes the present situation with emphasis on existing research capabilities and recent R T D activities. Furthermore, the stimulating actions of the relevant public authority responsible for research and technology in Greece are highlighted in the context of its policy to promote development of high-tech sectors.

Conventional methods of repair for metallic aircraft structures usually include the use of bolted or riveted metallic reinforcement by introducing the cutting of damaged areas, which is not suggested in aging cases, due to the reduction of strength. Although today the bonded repairs are considered more efficient than the mechanically fastened, each repair is looked-upon as tailored made for each job. However, for the industrial engineering and maintenance production line, there is a lack of appropriate technical manuals - standards and specifications to control the implementation of the repair as integrated method - from the design phase, up to application and quality assurance.