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Data-Driven Dynamics Modelling Using Flight Logs
(2021)A good dynamics model has many useful applications such as in simulations and control. Obtaining such models using conventional methods such as wind tunnel testing for UAVs can be time intensive, challenging and time intensive. For this reasons this thesis presents a data-driven dynamics modelling pipeline for a unified flight log(uLog) format. The objective hereby is to provide a framework to obtain a dynamics model without the ...Student Paper -
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Compiling JSONiq Queries to Native Machine Code
(2021)JSONiq is a querying language specifically tailored for JSON files, whose key capability is to deal with unorganized and heterogeneous data. However, this benefit comes at a computational cost. The current implementations usually do not have any optimization on homogeneous data. In some cases, these optimization exists but are however limited. As a result, a substantial amount of overhead can be removed when considering homgenous data. ...Student Paper -
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Studies on Mechatronics: Optimization Methods for Gas Compressors
(2021)This paper reviews several methods that can be used to optimize the load sharing of gas compressor arranged in parallel and serial configurations. The qualitative analysis and comparison are focused on online feedback-based optimization methods such as Modifier Adaptation, Real-Time Iterations and the recently proposed Feedback Optimization. The idea of Feedback Optimization is shown by presenting gradient and saddle flow as solvers of ...Student Paper -
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Data-Driven Control of Buildings and Energy Hubs
(2020)Building energy management has gained an increasing interest in research since there is a substantial potential for energy savings. With an energy consumption of around 40% globally efficient building control algorithms can create a big impact on our future society. Previous studies have successfully shown how model based predictive control can optimize the energy management. But the performance of these methods rely on accurate dynamical ...Student Paper -
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Recurrence formulae for the coefficients of mock theta functions of order 5 and 7
(2021)We compute recurrence formulae for the coefficients of Ramanujan’s mock theta functions of order 7 and 5. Our computations rely on a method developed by J.H. Bruinier and M. Schwagenscheidt, who obtained an equation for such coefficients by evaluating regularized theta lifts of harmonic Maass forms in two different ways.Student Paper -
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Construction of a user-level probabilistic forecast of electric vehicle usage
(2020)Electric vehicles are expected to play a crucial role in future low carbon mobility systems and it is anticipated that sales will grow significantly, both through government interventions and technological advancements [46]. While dispersion of electric vehicles is often seen as potential problem on electricity distribution system level, intelligent control of charging & discharging processes oriented on electricity spot market ...Student Paper -
Proboscis search & rescue. Worm-like Softrobot for Search and Rescue Missions
(2018)Even though earthquakes are older than mankind, rescue equipment is still quite rudimentary. Currently, buried victims can be located with dogs or drones, but to reach them, large amounts of debris and other obstacles have to be removed carefully. This can take several days as heavy machinery and a lot of manpower is required. The goal of Focus Project Proboscis is to shortcut the rescue process and work on a physical solution to ...Student Paper -
Optimizing Deep-stall Landing Maneuvers on Small Fixed-wing UAVs
(2019)The increasing importance of UAVs in today’s world is undisputed. However, fixedwing UAVs are often marginalized. This marginalization is often caused by the difficulties landing them. Landing in deep-stall is an approach to deal with this issue. It allows landing at steep flightpath angles and at low horizontal speed, thanks to massively increased drag and reduced lift. This is possible without needing any additional tools like ...Student Paper -
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Truth be told: Benchmarking BLE and IEEE 802.15.4
(2019)A large body of recent flooding-based communication protocol proposals for wire- less sensor networks exploit concurrent transmissions (CT). Many existing pro- tocols are designed to run on the IEEE 802.15.4 physical layer. Thus, there is extensive research on the conditions required for successfully receiving CT over IEEE 802.15.4. While IEEE 802.15.4 is popular in the research community, Blue- tooth Low Energy (BLE) has experienced ...Student Paper