TY  - CHAP
A1  - Nakagawa, Masaki
A1  - Michaux, Frank
A1  - Kallweit, Stephan
A1  - Maeda, Kazuhiro
T1  - Unsteady flow measurements in the wake behind a wind-tunnel car model by using high-speed planar PIV
T2  - 11TH International Symposium on Particle Image Velocimetry – PIV15 Santa Barbara, California, September 14-16, 2015
N2  - This study investigates unsteady characteristics of the wake behind a 28%-scale car model in a wind tunnel using highspeed planar particle image velocimetry (PIV). The car model is based on a hatchback passenger car that is known to have relatively high fluctuations in its aerodynamic loads. This study primarily focuses on the lateral motion of the flow on the horizontal plane to determine the effect of the flow motion on the straight-line stability and the initial steering response of the actual car on a track. This paper first compares the flow fields in the wake behind the above mentioned model obtained using conventional and high-speed planar PIV, with sampling frequencies of 8 Hz and 1 kHz, respectively. Large asymmetrically coherent flow structures, which fluctuate at frequencies below 2 Hz, are observed in the results of highspeed PIV measurements, whereas conventional PIV is unable to capture these features of the flow owing to aliasing. This flow pattern with a laterally swaying motion is represented by opposite signs of cross-correlation coefficients of streamwise velocity fluctuations for the two sides of the car model. Effects of two aerodynamic devices that are known to reduce the
fluctuation levels of the aerodynamic loads are then extensively investigated. The correlation analyses reveal that these devices indeed reduce the fluctuation levels of the flow and the correlation values around the rear combination-lamp, but it is found that the effects of these devices are different around the c-pillar.
Y1  - 2015
ER  - 
TY  - CHAP
A1  - Neumann, Tobias
A1  - Ferrein, Alexander
A1  - Kallweit, Stephan
A1  - Scholl, Ingrid
T1  - Towards a mobile mapping robot for underground mines
T2  - 7th Conference of Robotics and Mechatronics : RobMech 2014 : 27th and 28th Nov. 2014, Cape Town
Y1  - 2014
SP  - 1
EP  - 6
ER  - 
TY  - CHAP
A1  - Schleupen, Josef
A1  - Engemann, Heiko
A1  - Bagheri, Mohsen
A1  - Kallweit, Stephan
T1  - The potential of SMART climbing robot combined with a weatherproof cabin for rotor blade maintenance
T2  - 17th European Conference on Composite Materials – ECCM, Munich, Germany
Y1  - 2016
N1  - ECCM 17
SP  - 1
EP  - 8
ER  - 
TY  - CHAP
A1  - Schleupen, Josef
A1  - Engemann, Heiko
A1  - Bagheri, Mohsen
A1  - Kallweit, Stephan
A1  - Dahmann, Peter
T1  - Developing a climbing maintenance robot for tower and rotor blade service of wind turbines
T2  - Advances in Robot Design and Intelligent Control : Proceedings of the 25th Conference on Robotics in Alpe-Adria-Danube Region (RAAD16)
Y1  - 2017
SN  - 978-3-319-49058-8
U6  - http://dx.doi.org/10.1007/978-3-319-49058-8_34
N1  - Advances in Robot Design and Intelligent Control ; Vol. 540
SP  - 310
EP  - 319
PB  - Springer
CY  - Cham
ER  - 
TY  - BOOK
A1  - Weber, Hans-Joachim
A1  - Kaminsky, Radoslav
A1  - Kallweit, Stephan
A1  - Simons, Antoine
T1  - PIV measurements with high temporal resolution behind artificial heart valves
Y1  - 2005
N1  - International Symposium on Particle Image Velocimetry <6, 2005, Pasadena, Calif.>
ER  - 
TY  - CHAP
A1  - Wiesen, Patrick
A1  - Engemann, Heiko
A1  - Limpert, Nicolas
A1  - Kallweit, Stephan
T1  - Learning by Doing - Mobile Robotics in the FH Aachen ROS Summer School
T2  - European Robotics Forum 2018, TRROS18 Workshop
Y1  - 2018
SP  - 47
EP  - 58
ER  -