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Bleeding in engines is essential to mitigate the unmatched air massflow between low and High Pressure (HP) compressors at low speed settings, thus avoiding unstable operation due to surge and phenomena. However, by emerging the More Electric Aircraft (MEA) the engine is equipped with electrical machines on both high and Low Pressure (LP) spools which enables transfer of power electrically from one spool to another and hence provides the opportunity to operate engine core components closer to their optimum design point at off-design conditions. At lower power setting of the engine, HPC speed can be increased by taking power from LP shaft and feeding it to HP shaft which can lead to the removal of the bleeding system which in turn reduces weight and fuel consumption and help to overcome engine instability issues. Fuel consumption can be decreased by decreasing inconsistent thrust with the aircraft mission for flight and ground idle settings.

Pilots in fighter aircraft can be subjected to high temperatures during ground operating phases in hot climate conditions, especially if APU mode is not available. A Cooling Generation System (CGS) used with a protective thermal garment for fighter aircraft pilots has been developed that allows cooling of the pilot in the cockpit. The unit is designed to operate under worst case conditions and requires only that the pilot plugs in upon entering the cockpit. A liquid circulates inside the garment that covers the pilot’s torso, arms and head (area under the helmet). The temperatures are defined to guarantee the user’s comfort. The pilot can adjust the power delivered by the CGS, i.e. the temperature of the circulating fluid, up to a maximum cooling capacity of 400 W. The CGS design is based on a small variable speed compressor with a brushless motor, which is the outcome of a dedicated development, and a custom-made evaporator and condenser for maximum efficiency and minimum volume.

Model Based Safety techniques have been developed for a number of years, though the models have not been customised to help address the safety considerations/ actions at each refinement level. The work performed in the MISSA Project looked at defining the content of “safety models” for each of the refinement levels. A modelling approach has been defined that provides support for the initial functional hazard analysis, then for the systems architectural definition level and finally for the systems implementation level. The Aircraft functional model is used to apportion qualitative and quantitative requirements, the systems architectural level is used to perform a preliminary systems safety analysis to demonstrate that a system architecture can satisfy qualitative and quantitative requirements.

The Flexible Assembly Cell for Aeronautical Industry (FACAI) is described. The cell was developed in order to take advantage of the benefit of hard automation while retaining the flexibility of the manual assembly system it replaces. A description of both the generic equipment, selected to be non-specific to both the process and the assemblies intended to be built, is provided. In addition, all specific hardware, including end-effectors and fastener distribution systems are described, along with the rationale for their choice. The reasons for the modular design are explained. The means by which the flexibility goal was achieved are outlined. The demonstrated ability of the cell to install a wide range of fasteners (solid rivets, lockbolts, Hilocks) without the need for manual reconfiguration is detailed. The means by which both the quality and safety goals were attained are explained.

In the frame of the development of the European EVA Suit, a complete trade-off was conducted to select the lower torso architecture. This study, performed under an ESA contract, included a formal trade-off dealing with all cost and programmatic impacts together with a technical assessment based on man rated underwater evaluations and analysis. The candidate architectures were: the European baseline including 2 hip and 2 thigh bearings, the Russian like soft ORLAN-DMA, a soft lower torso including 2 thigh bearings and another soft one including 2 calf bearings. The idea was to compare the different design performances without having necessarily developed the 4 pressurized lower torsos and then also to gain experience on predicting methods for such ergonomic/kinematic studies. The trade-off was based on the manned underwater evaluation of ergonomical suit simulators (wet suit concept), supported by the 1-g pressurized evaluation of the Russian ORLAN-DMA and CAD-CAM kinematic analysis.

Avcorp Industries Inc. recognized the need to reduce assembly labor costs in order to stay competitive with global competition. After two years of research and investigation it was determined that a joint project with Dassault Aviation provided the most viable solution. The key elements of the technology developed by Dassault were its high flexibility and rapid payback of capital investment. This paper describes the system and the application. The structure’s design and robotic system design were performed in parallel. A number of design challenges had to be overcome. Many of these issues encountered were common to any automated assembly application. By covering these challenges Avcorp was able to introduce automated assembly at a level that had typically been previously attained exclusively by much larger enterprises. The robotic system consists of two anthropomorphic robots, which work both individually and in tandem.