Funktions- und Gewichtsoptimierung an Komponenten der Inneneinrichtung eines Luftfahrzeugs

Abstract

Today's emergency helicopters are an essential part of our life. They are used for several missions including mountain rescue, time critical transport of patients and more. Therefore, they are a very important part of modern rescue concepts. Worldwide are currently over 2000 emergency helicopters operating. 25% of these helicopters are Airbus Helicopters Type H135. The H135 is widely used through several air medicine unions in Europe. So a project was launched for further development of the H135 cabin. The project goal was to improve the interior with feedback of the operational crew. The interviews show an improvement potential of the integral medical floor, stretcher, medical cabinets and the moveable doctor seat. A market analysis of helicopter interiors showed that all suppliers had a very common solution for the interior. This is due to the fact that the space inside the helicopter is very limited. The project also picks up the concept of using an integral medical floor. All other parts will be connected with this floor, except the additional medical cabinet. This cabinet will not be connected with the floor in the future. Instead it will only be mounted to the sidewall of the cabin. This thesis targets the medical floor and the moveable doctor seat. The other parts will be developed by other employees of the TU Wien. This work required the use of the computer aided design software CATIA V5, as the entire project uses this software. In this case it's mainly used for engineering and showing the parts as a digital mock-up. In the aviation industry all developed parts have to be approved by an aeronautical authority. The project targets an approval of the European Aviation Safety Agency (EASA). Their regulations specify the conditions that have to be met with all parts of the helicopter's interior. This thesis shows the realisation of three possible concepts for the medical cabinet and the moveable seat. Each concept is almost finished, but still needs some minor improvement circles. A functional analysis of the given interior shows that the functional concept could be reused. However, due to the high friction conditions it has to be improved. Given this, all concepts include additional roles, so the friction is partially roll friction and sliding friction. The concepts of the medical floor include two different types. In the first solution the medical floor weight is minimised by dividing the floor into two parts. For the first the height is given by the seat tracks. In the second part the height could be minimised to a metal sheet. The second solution picks up the original floor and reengineers it with composite materials. Finally, a rating for the concepts is made. It shows that a middle way between the simplest solution and the solution with the least influence on the seat has to be selected. In this case it is solution number four, which puts the seat on eight little rolls. This relieves the sliding friction and has only a slight impact on the seat.