Browsing NTNU Open by Author "Wenz, Andreas Wolfgang"
Now showing items 1-9 of 9
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Combining model-free and model-based angle of attack estimation for small fixed-wing UAVs using a standard sensor suite
Wenz, Andreas Wolfgang; Cristofaro, Andrea; Johansen, Tor Arne (Chapter, 2016)We propose to estimate steady and turbulent wind velocities and aerodynamic coefficients of a fixed-wing Unmanned Aerial Vehicle (UAV) by using frequency separation as well as kinematic, aerodynamic and wind models combined ... -
Estimation of Wind Velocities and Aerodynamic Coefficients for UAVs using standard Autopilot Sensors and a Moving Horizon Estimator
Wenz, Andreas Wolfgang; Johansen, Tor Arne (Chapter; Peer reviewed, 2017)While operating any aircraft it is vital to know its current flight state. Some of the most important variables to assess the flight state are the airspeed, the angle of attack and the sideslip angle. Larger aircraft are ... -
Icing Detection for Small Fixed Wing UAVs using Inflight Aerodynamic Coefficient Estimation
Wenz, Andreas Wolfgang; Johansen, Tor Arne (Peer reviewed; Journal article, 2019)In cold and humid environments, airfoil icing is a major hindrance to UAV operations. Airfoil icing increases the aerodynamic drag coefficient, while reducing the maximum lift coefficient and the stall angle. This results ... -
Icing detection for small fixed wing UAVs using inflight aerodynamic coefficient estimation
Wenz, Andreas Wolfgang; Johansen, Tor Arne (Chapter, 2016)We propose a method to detect icing of the airfoil of a fixed-wing Unmanned Aerial Vehicle by using an aerodynamic coefficient estimator and ambient temperature and humidity sensors. The estimator uses the information ... -
Impact of Atmospheric Icing on UAV Aerodynamic Performance
Hann, Richard; Wenz, Andreas Wolfgang; Gryte, Kristoffer; Johansen, Tor Arne (Chapter, 2017)This paper presents a first assessment on the impact of atmospheric icing on the aerodynamic performance of fixed-wing UAVs. Numerical simulations were performed in order to evaluate the impact on lift and drag on a 2D ... -
Inflight Estimation of Airflow Variables, Wind Velocities and Aerodynamic Coefficients for Unmanned Aerial Vehicles
Wenz, Andreas Wolfgang (Doctoral theses at NTNU;2018:349, Doctoral thesis, 2018)This thesis focuses on the estimation of wind velocities, angle of attack and aerodynamic coefficients for small unmanned aerial vehicles (UAVs) and in addition, the use of these estimates for two different applications. ... -
Moving Horizon Estimation of Air Data Parameters for UAVs
Wenz, Andreas Wolfgang; Johansen, Tor Arne (Journal article; Peer reviewed, 2019)Local wind velocities, angle of attack and lift coefficients of a fixed-wing unmanned aerial vehicle (UAV) are estimated by fusing kinematic, aerodynamic and stochastic wind models with data from an inertial measurement ... -
Propulsion System Modeling for Small Fixed Wing UAVs
Coates, Erlend Magnus Lervik; Wenz, Andreas Wolfgang; Gryte, Kristoffer; Johansen, Tor Arne (Chapter, 2019)This paper presents a model of an electrical propulsion system typically used for small fixed wing unmanned aerial vehicles (UAVs). Such systems consist of a power source, an electronic speed controller and a brushless DC ... -
Real-Time Moving Horizon Estimation of Air Data Parameters and Wind Velocities for fixed-wing UAVs
Wenz, Andreas Wolfgang; Johansen, Tor Arne (Chapter, 2020)We present a real-time implementation of an estimation algorithm for angle of attack, airspeed and wind velocities estimation on a single board computer. The estimator uses only sensor data from a standard fixed-wing UAV ...