Refine
Year of publication
- 2024 (2)
- 2023 (16)
- 2022 (12)
- 2021 (19)
- 2020 (29)
- 2019 (43)
- 2018 (23)
- 2017 (32)
- 2016 (26)
- 2015 (31)
- 2014 (13)
- 2013 (26)
- 2012 (12)
- 2011 (22)
- 2010 (24)
- 2009 (22)
- 2008 (19)
- 2007 (31)
- 2006 (31)
- 2005 (39)
- 2004 (21)
- 2003 (21)
- 2002 (21)
- 2001 (21)
- 2000 (16)
- 1999 (17)
- 1998 (15)
- 1997 (16)
- 1996 (8)
- 1995 (10)
- 1994 (12)
- 1993 (9)
- 1992 (10)
- 1991 (8)
- 1990 (15)
- 1989 (9)
- 1988 (9)
- 1987 (7)
- 1986 (1)
- 1985 (10)
- 1984 (6)
- 1983 (8)
- 1982 (3)
- 1979 (1)
- 1978 (1)
- 1977 (2)
Document Type
- Article (364)
- Conference Proceeding (192)
- Book (107)
- Part of a Book (43)
- Patent (19)
- Doctoral Thesis (10)
- Report (8)
- Other (3)
- Diploma Thesis (1)
- Master's Thesis (1)
- Poster (1)
Has Fulltext
- no (749) (remove)
Keywords
- avalanche (6)
- solar sail (5)
- hydrogen (4)
- snow (4)
- GOSSAMER-1 (3)
- Hydrogen (3)
- MASCOT (3)
- Wind Tunnel (3)
- Drinfeld modules (2)
- Flight Test (2)
- Mars (2)
- Micromix (2)
- NOx emissions (2)
- Pitching Moment (2)
- Solar sail (2)
- Spacecraft (2)
- Trajectory Optimization (2)
- Transcendence (2)
- Wave Drag (2)
- combustor development (2)
Institute
- Fachbereich Luft- und Raumfahrttechnik (749) (remove)
Even the shortest flight through unknown, cluttered environments requires reliable local path planning algorithms to avoid unforeseen obstacles. The algorithm must evaluate alternative flight paths and identify the best path if an obstacle blocks its way. Commonly, weighted sums are used here. This work shows that weighted Chebyshev distances and factorial achievement scalarising functions are suitable alternatives to weighted sums if combined with the 3DVFH* local path planning algorithm. Both methods considerably reduce the failure probability of simulated flights in various environments. The standard 3DVFH* uses a weighted sum and has a failure probability of 50% in the test environments. A factorial achievement scalarising function, which minimises the worst combination of two out of four objective functions, reaches a failure probability of 26%; A weighted Chebyshev distance, which optimises the worst objective, has a failure probability of 30%. These results show promise for further enhancements and to support broader applicability.
Assistance systems have been widely adopted in the manufacturing sector to facilitate various processes and tasks in production environments. However, existing systems are mostly equipped with rigid functional logic and do not provide individual user experiences or adapt to their capabilities. This work integrates human factors in assistance systems by adjusting the hardware and instruction presented to the workers’ cognitive and physical demands. A modular system architecture is designed accordingly, which allows a flexible component exchange according to the user and the work task. Gamification, the use of game elements in non-gaming contexts, has been further adopted in this work to provide level-based instructions and personalised feedback. The developed framework is validated by applying it to a manual workstation for industrial assembly routines.
Having well-defined control strategies for fuel cells, that can efficiently detect errors and take corrective action is critically important for safety in all applications, and especially so in aviation. The algorithms not only ensure operator safety by monitoring the fuel cell and connected components, but also contribute to extending the health of the fuel cell, its durability and safe operation over its lifetime. While sensors are used to provide peripheral data surrounding the fuel cell, the internal states of the fuel cell cannot be directly measured. To overcome this restriction, Kalman Filter has been implemented as an internal state observer.
Other safety conditions are evaluated using real-time data from every connected sensor and corrective actions automatically take place to ensure safety. The algorithms discussed in this paper have been validated thorough Model-in-the-Loop (MiL) tests as well as practical validation at a dedicated test bench.
Kinetik. - (Dynamik ; 2)
(1994)
Kinematik. - (Dynamik ; 1)
(1993)