Design process and manufacturing of an unmanned blended wing-body aircraft

The design process, the dimensioning, the proof and the manufacturing of a blended wing-body configuration aircraft with diamond shape is presented. The open collaboration project Sagitta is initiated by Airbus Defence and Space with the objective to investigate innovative aircraft configurations for future unmanned aerial systems (UAS) and the therefor necessary technologies. In cooperation of the German Aerospace Centre (DLR) and the Technical University of Munich (TUM) the aircraft structure is realized. A brief project overview points out the objectives of Sagitta and summarizes the characteristics of the extremely lightweight carbon fibre structure. This work focusses on the computation of loads, the process of structural sizing, the simulation-based mainly structural proof and the manufacturing. Particular attention is paid to the specifically developed semi-analytical method for dimensioning adhesive joints. Basing on the detailed finite element model of the global structure, the applicability of adhesive joints as major structural joining variant is proven. The manufacturing process from single components to the assembly of the overall aircraft concludes the realization of the Sagitta demonstrator structure

Reduced order model of a blended wing body aircraft configuration

This paper describes the full development process of a numerical simulation model for the ACFA2020 (Active Control for Flexible 2020 Aircraft) blended wing body (BWB) configuration. Its requirements are the prediction of aeroelastic and flight dynamic response in time domain, with relatively small model order. Further, the model had to be parameterized with regard to multiple fuel filling conditions, as well as flight conditions. High efforts have been conducted in high-order aerodynamic analysis, for subsonic and transonic regime, by several project partners. The integration of the unsteady aerodynamic databases was one of the key issues in aeroelastic modeling

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The potential advantages of Blended Wing Body (BWB) aircraft in terms of fuel efficiency are opposed by technical challenges such as the alleviation of gust loads. Due to the low wing, loading gusts, generally, have a more severe impact on BWB aircraft than on conventional aircraft. This paper presents the design and optimization of a Gust Load Alleviation System (GLAS) for a large BWB airliner. Numerical simulations are performed with an aeroelastic model of the aircraft including GLAS in order to compute time series of modal displacements for deriving equivalent static load cases which are used for the resizing of the aircraft structure

Datensicherheit von Corona-Apps nach der DSGVO

Der Beitrag analysiert die Protokolle der Konsortien DP-3T und PEPP-PT aus technischer Perspektive und grenzt diese voneinander ab. Zudem wird die technische Ausgestaltung der Entwicklerschnittstelle (API) von Google und Apple dargestellt. Aufbauend darauf erfolgt eine rechtliche Beurteilung der sich aus Art. 5 Abs. 1 lit. f, 25, 32 DSGVO ergebenden und die Datensicherheit betreffenden Kriterien und deren konkrete Umsetzung in den Protokollen

Kollaboration im Datenschutz: Collaboration Engineering als Instrument zur partizipativen und nachhaltigen Gestaltung von Datenschutzprozessen

Die DSGVO enthält sehr unterschiedliche Vorgaben zur Zusammenarbeit verschiedener Akteure, aber kein systematisches Modell für die Ausgestaltung dieser Formen der Zusammenarbeit. Gerade für KMU könnten standardisierte Verfahren ein Ansatz zur effizienten Umsetzung sein. Der Beitrag untersucht die Frage, an welchen Stellen Ansätze des Collaboration Engineering Zusammenarbeitsprozesse ermöglichen würden, die die gesetzlichen Vorgaben mit Leben füllen

Power blackout: Citizens’ contribution to strengthen local resilience

A long-lasting, large-scale power blackout has a huge impact on the infrastructure of public life, as well as on critical infrastructure including electricity and water supply. At the same time, it can be observed that the share of renewable energies, and thus the possibility of self-sufficiency, has increased enormously in recent years. This contribution focuses on the question to what extend citizens are willing to share their electricity resources in order to make their city more resilient. In reference to Ostrom's concept of club or common goods, it can be shown if and how the private good of citizen's electricity resources can be transformed into a club or even a common good. Drawing on survey data from the city of Darmstadt we investigated the willingness to share electricity and to participate in participatory formats to enhance urban resilience

Gust Load Alleviation on a Large Blended Wing Body Airliner

This paper investigates the gust load response of a large 750 passenger Blended Wing Body (BWB) airliner for identification of sizing cases for the aircraft structure. Considering manoeuvre load alleviation, gust loads become the dominant sizing factor for the BWB airplane. In order to allow for structural weight saving a Gust Load Alleviation System (GLAS) is designed and evaluated by numeric simulations