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Item type:Publication, Access status: without files , Enabling airworthiness security by a holistic security engineering process at various aircraft design levels(International Council of the Aeronautical Sciences, 2024); ; Since the publication of the EASA certification specification CS-25.1319 in 2020, cyber security of aircraft and aircraft systems (airworthiness security) became mandatory for aircraft certification and must be considered in the aircraft and aircraft systems development even before the detailed design and implementation. For protection of aircraft from cyberattacks by Intentional Unauthorized Electronic Interaction (IUEI), security risk analyses are now embedded in the early phases of aircraft and aircraft systems development and security information has to be provided to subsequent phases. But this also requires, that processes and methods employed at the detailed design and implementation level are compatible to the processes and methods from the level above. For this reason, regulations and corresponding standards are analyzed in this paper to define requirements for a comprehensive and holistic security engineering approach that ensures traceability and consistency along the various development levels in the context of model-based systems, software, and security engineering.Publicationtype: Conference Paper82 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , A design approach for a model-scale VTOL powered by two pivoting kerosine turbinesAt the Institute of Air Transportation Systems, an innovative vertical take-off and landing (VTOL) model is being developed as a test vehicle to stimulate future research on combined highly automated flying and ground systems. The aircraft, primarily powered by two pivoting kerosene turbines, will serve as a multi-role transport aircraft for different mission scenarios, resulting in different payloads. Intended missions include surveillance in disaster scenario, ground and airborne vehicle jettison during landing or in-flight, and flight algorithm testing. The research question is how the design can be achieved and what design methodologies are appropriate. This paper describes the design methodology for the aircraft design process according to the given requirements and presents two of the main aircraft concepts under consideration. It also details the key steps in the process, such as iterating and alternating designs. The aim of the paper is to provide a design methodology that motivates disruptive variation for more efficient design evolution.Publicationtype: Conference Paper28 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , ESATTO : the holistic framework to support the design of sustainable supersonic aviation(International Council of the Aeronautical Sciences, 2024); ; 23 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Establishing the DLR-F25 as a research baseline aircraft for the schort-medium range market in 2035(International Council of the Aeronautical Sciences, 2024-09); 624 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Towards a holistic approach to increase sustainability in aircraft cabin designThe aviation industry is facing the challenge of increasing sustainability requirements and targets. The cabin offers the opportunity to introduce short-term and medium-term sustainability improvements in existing aircraft fleets. In order to holistically address sustainability in the aircraft cabin, the three sustainability strategies of efficiency, consistency and sufficiency are considered in this article and addressed at both product architecture and component level. At the product architecture level, it is shown that modularization has great potential to improve sustainability along the entire product life cycle, but that there is a lack of methods for modularization strategies that contribute to the development of sustainable products. Therefore, it is shown which sustainability criteria and indicators can be addressed at the different levels of a product architecture. At the component level, there is a lack of comparisons of alternative lightweight materials and design alternatives with conventional designs and materials in terms of sustainability. Therefore, it is shown how the design of lightweight methods of construction can be combined with LCA by the example of conventional and bio-based flax sandwich structures when used in an aircraft cabin. The studies show the importance of a requirements-oriented design in terms of sustainability.Publicationtype: Conference Paper76 162 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , MRO for VTOLS in a functional sequences solution space(International Council of the Aeronautical Sciences, 2024); ; 20 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Mitigating the climate impact of aviation by operational means - a comparative study for different weather situations(International Council of the Aeronautical Sciences, 2024); ; ; Aviation’s climate impact in terms of non-CO2 effects can be mitigated by operational trajectory adjustments. However, their effectiveness and efficiency varies significantly for different routes as well as meteorological conditions. Therefore, this study aims for a comparable assessment of different trajectory adaptation approaches under different weather conditions. For this purpose, detailed trajectory calculations are combined with climate sensitivity grids based on algorithmic climate change functions in order to assess variations in climate mitigation potentials. Significant mitigation potentials for vertical, lateral and temporal adaptation approaches are demonstrated and varying mitigation potentials in dependence of the meteorological situation are identified. For instance, higher mitigation potentials can be observed in December compared to June and for missions of higher contrail intensity.Publicationtype: Conference Paper28 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Mutual position plausibility checking in flying ad-hoc networks using distance measurementsIn this paper we present an approach to check the plausibility of UAV positions based on independent distance estimations between the nodes in a flying ad-hoc network (FANET) built up by the UAVs. To achieve this, we define a set of data messages that are flooded throughout the network by each node and that are used to derive a situational overview if received at a particular UAV. Based on the received data, distances between the nodes within the FANET can be estimated both from GNSS position readings as well as from time of flight information additionally provided in the data messages. The difference of both values can be used as an indicator to thereby classify edges and nodes of the FANET as plausible or implausible. In our work, we derive appropriate thresholds for the deviation of both measurements as well as a trust score for each node based on the plausibility values of adjacent edges. To showcase our approach, we apply it to an air traffic scenario based on drone package delivery in urban environments and simulate the data traffic in the resulting FANET resulting from the data messages we defined. We show, that our approach yields reasonable results for the evaluated scenario.Publicationtype: Conference Paper25 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Design of a UAM ground infrastructure network with respect to maintenance capacity requirements(International Council of the Aeronautical Sciences, 2024); ; ; Before a successful introduction of Urban Air Mobility can be achieved, numerous challenges must be ad-dressed, one of which is the development of efficient traffic networks with all associated components. Previous studies have already examined UAM networks in terms of fleet capacity requirements, energy supply, and parking positions. The aim of this study is the further development of these methods to analyze the necessary capacity of maintenance infrastructure for an eVTOL fleet. Another aspect of this work is to investigate the im-pact of the centralization degree of a maintenance facility network. While centralized networks have potential to reduce redundancies, decentralized networks may help to reduce detours caused by empty relocation flights to maintenance facilities. Therefore, necessary maintenance intervals are first investigated. Based on these insights, maintenance processes are then planned for an exemplary fleet operating in the City of Hamburg (Germany). Finally, the overall demand for maintenance services is quantified at the network level and the potential benefits of a decentralized maintenance facility network are evaluated with regard to the reduction of empty flights.Publicationtype: Conference Paper23 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Building methods for a composite constructed VTOL using 3D printing techniquesGenerally, prototyping goes hand in hand with additive manufacturing technologies. Especially in the construction of unmanned aerial vehicles (UAV), these rapid prototyping methods are a key to quickly obtaining a functional prototype. The Institute of Air Transportation Systems is working on an innovative vertical take-off and landing (VTOL) model in the 25 kg weight class. The main airframe is intended to be built from composite materials in combination with each other and/or with the help of 3D printing materials. This article details the construction methods for the structure of the proposed aircraft. A main focus lies on the implementation of 3D printing methods, mainly via Fused Deposition Modelling (FDM) and different types of plastic as printing material, to derive different construction methods, including composite hybrid structures, for the respective structural components. In addition, issues on structural design, load tests and final results of the efforts are presented. This paper is intended to be a guide for other developers/researchers, who start prototyping their own serious aircraft builds, without being dependent on conventional machinery.Publicationtype: Conference Paper175