Optical measurement systems are becoming increasingly popular in wind tunnel research since these systems do not disturb the flow. NLR has extensive experience in applying optical systems in both fundamental and industrial research.
Recently a Stereo Pattern Recognition (SPR) system with high speed cameras has been used by NLR for tracking falling objects in a wind tunnel. Trajectories were measured satisfactorily but there is still room for improvements. One aspect that can be improved is the data post-processing.
Currently the position and attitude of the tracked object is determined for each frame (time step) individually. Trajectories can be determined more accurately by using data from other frames in combination with a dynamic model.
You will derive and implement an universal dynamic model for a free falling object. Universal in this context means that the dynamic model can be used for different objects in terms of mass and inertia. Preferably the dynamic model is invertible; the position and attitude of the object can be determined with fixed exterior mounted cameras but the position and attitude of the object can also be determined with internal cameras which record the surrounding.
To validate the model you will design and carry out an experiment to track a well-known trajectory.
The implemented dynamic model will increase the accuracy of the SPR-system for free falling objects. In future this can be extended to fixed wind tunnel models, like clamped wings.
The dynamic model can be applied to other research fields in which NLR operates. The inverted dynamic model can be used to determine the position and attitude of drones.
A report in which the derivation and implementation of the dynamic model is explained.
When results are satisfactorily a publication of a paper in cooperation with an NLR expert could be achieved for presenting in an (inter)national forum.
Duration of internship
Approximately 9 months, exact duration to be decided by mutual agreement. Start as soon as possible.
We are looking for:
• Master student in a technical study; Aerospace Engineering, Mathematics, Mechanical Engineering, Physics;
• Interest and knowledge in the area of dynamics;
• Enthusiasm and willingness to work with existing image processing tools and implement new software routines in preferable Python;
• Not afraid to learn something new and practical ‘Getting Things Done’ mentality.
• An inspiring high-tech aerospace-oriented working environment;
• Informal culture with room for personal initiative, in which results and commitment are important pillars;
• A compensation for general expenditures and travel expenses.
NLR, dedicated to innovation in aerospace, is the main organisation in The Netherlands in the field of aerospace research. In total NLR has 650 employees; ranging from aircraft engineers to psychologists and from mathematicians to application experts.
During your Master thesis you will be a member of the department AVHA (Aeroacoustics and Helicopters). The aeroacoustic part of this department is involved in simulation and measurements, measurements are performed ‘in the field’ or in wind tunnels. The helicopter part is involved in wind tunnel research, flight tests, qualification and certification. Besides aeroacoustics and helicopters this department is involved in experimental aerodynamics.
For more information about the internship you can contact Karel Lammers, 088-5114660, email@example.com.
You can find us also on Youtube with our own channel NLRmedia.
You can apply for the internship by e-mailing your motivation letter and CV to Karel Lammers, firstname.lastname@example.org.
Datum : 08/06/2017
Locatie : Marknesse (Flevoland)
Uren : 40
Opleidingsniveau : University
Achtergrond : Aerospace Engineering, Advanced Technology, Applied/Technical Mathematics, Mechanical Engineering, Technical Physics