TY  - THES
A1  - Wahle, Michael
T1  - Beitrag zur passiven Kontrolle schwach gedämpfter elastischer Strukturen mittels dynamischer Schwingungsdämpfer
Y1  - 1985
N1  - Aachen, Techn. Hochsch., Diss., 1984
ER  - 
TY  - JOUR
A1  - Gerhardt, Hans Joachim
A1  - Kramer, C.
T1  - Belastung von RA bei Windangriff
JF  - Zentralblatt fuer Industriebau. 30 (1984), H. 3
Y1  - 1984
SN  - 0044-4227
SP  - 214
EP  - 217
ER  - 
TY  - JOUR
A1  - Gerhardt, Hans Joachim
T1  - Belastung von Rauchabzugsgeraeten bei Windangriff
JF  - Sanitaer- und Heizungstechnik. 51 (1986), H. 3
Y1  - 1986
SN  - 0036-4401
SP  - 150
EP  - 152
ER  - 
TY  - JOUR
A1  - Peeken, Heinz
A1  - Rosenkranz, Josef
A1  - Schelenz, R.
T1  - Berücksichtigung des Einflusses der Gleitlagergehäusesteifigkeit auf das dynamische Verhalten von Rotoren
JF  - Antriebstechnik : Organ der Forschungsvereinigung Antriebstechnik e.V.
Y1  - 1991
SN  - 0341-2652
VL  - 30
IS  - 9
SP  - 71
EP  - 75
ER  - 
TY  - RPRT
A1  - Rosenkranz, Josef
T1  - Berücksichtigung des Einflusses von Gleitlagergehäusen auf das dynamische Verhalten von Rotoren : Abschlußbericht : Forschungsvorhaben Nr. 128 "Gleitlagergehäusesteifigkeit" ; Berichtszeitraum 1985-1988. - (Forschungsheft / Forschungsvereinigung Antriebstechnik e.V. ; 303)
Y1  - 1989
N1  - Förderkennzeichen BMWi/AIF-Nr. 6371
PB  - FVA
CY  - Frankfurt am Main
ER  - 
TY  - BOOK
A1  - Ley, Wilfried
T1  - Bewertung von Solarkollektormessungen unter natuerlichen und simulierten Bedingungen
Y1  - 1982
N1  - Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt : Forschungsbericht ; 1982,5 ; zugl. Dissertation, Universität Bochum Abt. für Maschinenbau, 1981
PB  - Inst. f. Raumsimulation
CY  - Köln
ER  - 
TY  - JOUR
A1  - Blome, Hans-Joachim
A1  - Priester, W.
T1  - Big Bounce in the very early Universe
JF  - Astronomy and Astrophysics. 250 (1991), H. 1
Y1  - 1991
SN  - 0004-6361
SP  - 43
EP  - 49
ER  - 
TY  - JOUR
A1  - Thomessen, Karolin
A1  - Thoma, Andreas
A1  - Braun, Carsten
T1  - Bio-inspired altitude changing extension to the 3DVFH* local obstacle avoidance algorithm
JF  - CEAS Aeronautical Journal
N2  - Obstacle avoidance is critical for unmanned aerial vehicles (UAVs) operating autonomously. Obstacle avoidance algorithms either rely on global environment data or local sensor data. Local path planners react to unforeseen objects and plan purely on local sensor information. Similarly, animals need to find feasible paths based on local information about their surroundings. Therefore, their behavior is a valuable source of inspiration for path planning. Bumblebees tend to fly vertically over far-away obstacles and horizontally around close ones, implying two zones for different flight strategies depending on the distance to obstacles. This work enhances the local path planner 3DVFH* with this bio-inspired strategy. The algorithm alters the goal-driven function of the 3DVFH* to climb-preferring if obstacles are far away. Prior experiments with bumblebees led to two definitions of flight zone limits depending on the distance to obstacles, leading to two algorithm variants. Both variants reduce the probability of not reaching the goal of a 3DVFH* implementation in Matlab/Simulink. The best variant, 3DVFH*b-b, reduces this probability from 70.7 to 18.6% in city-like worlds using a strong vertical evasion strategy. Energy consumption is higher, and flight paths are longer compared to the algorithm version with pronounced horizontal evasion tendency. A parameter study analyzes the effect of different weighting factors in the cost function. The best parameter combination shows a failure probability of 6.9% in city-like worlds and reduces energy consumption by 28%. Our findings demonstrate the potential of bio-inspired approaches for improving the performance of local path planning algorithms for UAV.
KW  - UAV
KW  - Obstacle avoidance
KW  - Autonomy
KW  - Local path planning
Y1  - 2023
U6  - https://doi.org/10.1007/s13272-023-00691-w
SN  - 1869-5590 (Online)
SN  - 1869-5582 (Print)
N1  - Corresponding author: Karolin Thomessen
PB  - Springer
CY  - Wien
ER  - 
TY  - GEN
A1  - Eickmann, Matthias
A1  - Esch, Thomas
A1  - Funke, Harald
A1  - Abanteriba, Sylvester
A1  - Roosen, Petra
T1  - Biofuels in Aviation – Safety Implications of Bio-Ethanol Usage in General Aviation Aircraft
N2  - Up in the clouds and above fuels and construction materials must be very carefully selected to ensure a smooth flight and touchdown. Out of around 38,000 single and dual-engined propeller aeroplanes, roughly a third are affected by a new trend in the fuel sector that may lead to operating troubles or even emergency landings: The admixture of bio-ethanol to conventional gasoline. Experiences with these fuels may be projected to alternative mixtures containing new components.
Y1  - 2014
N1  - 2. International Conference of the Cluster of Excellence Tailor-Made Fuels from Biomass, Aachen 2013
ER  - 
TY  - JOUR
A1  - Esch, Thomas
A1  - Funke, Harald
A1  - Roosen, Peter
A1  - Jarolimek, Ulrich
T1  - Biogene Automobilkraftstoffe in der allgemeinen Luftfahrt
JF  - Motortechnische Zeitschrift (MTZ).
Y1  - 2011
SN  - 0024-8525
U6  - https://doi.org/10.1365/s35146-011-0013-7
VL  - 72
IS  - 1
SP  - 54
EP  - 59
PB  - Springer Nature
CY  - Basel
ER  -