A5000964178- Distributed and Parallel Computing Systems
- Parallel Computing and Optimization Techniques
- Spacecraft Design and Technology
- Distributed systems and fault tolerance
- Embedded Systems Design Techniques
- Interconnection Networks and Systems
- Real-Time Systems Scheduling
- Systems Engineering Methodologies and Applications
- Advanced Frequency and Time Standards
- Space Technology and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Radiation Effects in Electronics
- Software Reliability and Analysis Research
- Formal Methods in Verification
- Advanced Software Engineering Methodologies
- Simulation Techniques and Applications
- Atomic and Subatomic Physics Research
- Service-Oriented Architecture and Web Services
- Software Engineering Techniques and Practices
- Safety Systems Engineering in Autonomy
- Space Satellite Systems and Control
- Modular Robots and Swarm Intelligence
- Supercapacitor Materials and Fabrication
- Model-Driven Software Engineering Techniques
- Software Testing and Debugging Techniques
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2013-2024
Software (Germany)
2012-2014
Technische Universität Berlin
2006-2009
Microgravity eases several constraints limiting experiments with ultracold and condensed atoms on ground. It enables extended times of flight without suspension eliminates the gravitational sag for trapped atoms. These advantages motivated numerous initiatives to adapt operate experimental setups microgravity platforms. We describe design payload, motivations choices, capabilities Bose-Einstein Condensate Cold Atom Laboratory (BECCAL), a NASA-DLR collaboration. BECCAL builds heritage...
The computational demands on spacecraft are rapidly increasing. Current on-board computing components and architectures cannot keep up with the growing requirements. Only a small selection of space-qualified processors FPGAs available current stick inflexible cold-redundant structure. objective ongoing project OBC-NG (On-board Computer - Next Generation) is to find new concepts for on-board-computer fulfill future concept presented in this paper based distributed reconfigurable system,...
Abstract We report on the design and construction of a sounding rocket payload capable performing atom interferometry with Bose-Einstein condensates $$^{41}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow/><mml:mn>41</mml:mn></mml:msup></mml:math> K $$^{87}$$ xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow/><mml:mn>87</mml:mn></mml:msup></mml:math> Rb. The apparatus is designed to be launched in two consecutive missions VSB-30 qualified...
The German Aerospace Center (DLR) is developing ScOSA (Scalable On-board Computing for Space Avionics) as a distributed on-board computing architecture future space missions. consists of commercial off-the-shelf (COTS) and radiation-tolerant nodes interconnected by SpaceWire network. system software provides services to enable parallel reconfiguration. This allows adapt node errors failures that COTS hardware susceptible in the environment. In ongoing Flight Experiment project, consisting...
Bose-Einstein condensates (BECs) in free fall constitute a promising source for space-borne matter-wave interferometry. Indeed, BECs enjoy slowly expanding wave function, display large spatial coherence and can be engineered probed by optical techniques. On sounding rocket, we explore fringes of multiple spinor components BEC released employing light-pulses to drive Bragg processes induce phase imprinting. The prevailing microgravity played crucial role the observation these interferences...
Abstract Designing on-board computers (OBC) for future space missions is determined by the trade-off between reliability and performance. Space applications with higher computational demands are not supported currently available, state-of-the-art, space-qualified computing hardware, since their requirements exceed capabilities of these components. Such include Earth observation high-resolution cameras, on-orbit real-time servicing, as well autonomous spacecraft rover on distant celestial...
The application of modeling and simulation in the design, development validation process complex systems has significantly increased last decades. Creating high quality models is a time-consuming task. Particularly, if should be shared reused future projects. In this paper, results project Simulation Model Library (SimMoLib) are presented that address issues concerning preservation knowledge lies within calculation models. SimMoLib provides guidelines best practices to help developer prepare...
Future space missions will demand greater capabilities regarding the processing of sensor data on onboard computers satellites than current technology can provide. Limited downlink bandwidth, high resolution sensors and more rigid real-time control algorithms, dedicated to increase satellite autonomy, drive need for growing computing performance. To overcome these challenges, new high-performance are necessary, leading an increased consideration Commercial-Of-The-Shelf (COTS) components. The...
This paper presents how a continuous mission verification process similar than in software engineering can be applied early spacecraft design and Concurrent Engineering.Following the Model-based Systems Engineering paradigm, all engineers contribute to one single centralized data model of system.The is enriched with some extra information create an executable representation its mission.That scenario allows for verifications against requirements that have been formalized using appropriate...
Modeling and simulation is a powerful method to evaluate the design of space system. Simulation models represent valuable knowledge require considerable time effort for their development. Means reuse should be taken into account from beginning model creation. This paper presents collaborative development process, which creates prerequisite information successful models. It introduces proposes reviewed documentation at each step in process. These pieces enable successive different levels. The...
The ScOSA project (Scalable On-board Computing for Space Avionics) of the German Aerospace Center aims at combining radiation hardened space hardware together with unreliable, but high performance COTS (commercial off-the-shelf) components as processing nodes in a heterogeneous on-board network order to provide future missions necessary capabilities. However, such system needs cope node failures. Our approach is use static reconfiguration graph that controls how software tasks are mapped...
There are several standardized protocols based on SpaceWire which provide data exchange between nodes. is also suitable for interprocess communication (IPC), by the help of higher level protocols. However, currently there no protocol targeting IPC networks. This paper proposes a protocol, uses capabilities to build up networks distributed computing spacecraft. The core this mechanism nodes and methods support reconfiguration network. A key feature an interface mechanism, can be implemented...
Optical technologies are promising candidates to improve or even revolutionize future Global Navigation Satellite Systems (GNSS). The advantages of optical compared their classical microwave counterparts numerous, e.g. better frequency stabilities clocks higher ranging accuracy using links. There already studies new concepts for GNSS, architectures which almost completely rely on technologies. most prominent and idea is DLR’s Kepler architecture concept, based references (OFRs) as well...
In the early design phase of a spacecraft, various aspects system under development are described and modeled using parameters such as masses, power consumption or data rates. particular special since their values can change depending on spacecrafts operational mode. These mode-dependent be easily verified to static requirements like maximumdata rate. Such quick verifications allow engineers check after every they apply. contrast, concerning mission lifetime amount downlinked during whole...
The complexity of space endeavors has increased the need for Knowledge Management (KM) tools. concept KM involves not only electronic storage knowledge, but also process making this knowledge available, reusable and traceable. Establishing a within Concurrent Engineering Facility (CEF) been research topic German Aerospace Centre (DLR). This paper presents current tools CEF: Software Platform Organizing Capturing (S.P.O.C.K.), data model Virtual Satellite (VirSat), Simulation Model Library...