Browsing Institutt for teknisk kybernetikk by Title
Now showing items 3473-3492 of 3663
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UAV anti-icing system based on conductive coating
(Master thesis, 2014)Icing on leading edge surfaces such as wings and propeller blades presents a major risk for UAVs operating in a cold and humid environment. Reducing or loss of manoeuvrability, loss of lift, increase in drag, reducing ... -
UAV Fault-Tolerant Control by Combined L1 Adaptive Backstepping and Fault-dependent Control Allocation
(Chapter, 2015)This paper presents an approach to obtain fault tolerance in the nonlinear longitudinal motion control of an aircraft. The approach uses an L1 adaptive backstepping controller and fault-dependent control allocation to ... -
UAV Icing: A Performance Model for a UAV Propeller in Icing Conditions
(Chapter, 2022)In-flight icing on unmanned aerial vehicles is a severe hazard and imposes limits on the operational envelope. Icing has been shown to lead to substantial aerodynamic performance losses on lifting surfaces and propellers. ... -
UAV Icing: A Unified Icing Severity Index Derived from Performance Degradation
(Chapter, 2022)A problem that unmanned aerial vehicles (UAV) operators face when dealing with in-flight icing conditions is a reliable way to assess icing severity risk. This paper aims to develop an icing severity index that looks at ... -
UAV icing: Development of an ice protection system for the propeller of a small UAV
(Journal article; Peer reviewed, 2023)Atmospheric icing, also called in-flight icing, is a common hazard for the operation of uncrewed aerial vehicles (UAVs). With the background of a growing commercial and military market of small and medium-sized drones and ... -
UAV Icing: Ice Accretion Experiments and Validation
(Journal article; Peer reviewed, 2019)Atmospheric icing is a key challenge to the operational envelope of medium-sized fixed-wing UAVs. Today, several numeric icing codes exist, that all have been developed for general aviation applications. UAVs with wingspans ... -
UAV Icing: Ice Shedding Detection Methods for an Electrothermal De-Icing System
(Chapter, 2022)Among the identified problems with unmanned aerial vehicles (UAVs), especially with the medium-sized fixed-wing UAVs, is a lack of mature ice protection systems (IPSs). One of the emerging UAV ice protection technologies ... -
UAV Icing: Icing Cases for Validation of Path Planning Method
(Peer reviewed; Journal article, 2023)As part of the complete solution to deal with atmospheric in-flight icing on unmanned aerial vehicles (UAV), a path planner is a valuable tool for finding an optimal path for accomplishing UAV missions. When considering ... -
UAV Icing: Intercycle Ice Effects on Aerodynamic Performance
(Peer reviewed; Journal article, 2023)Atmospheric in-flight icing poses a challenge to all aircraft including unmanned aerial vehicles (UAVs). Aircraft should avoid icing conditions unless they have ways of mitigating the negative effects of icing, e.g., if ... -
UAV net landing system for marine operations
(Master thesis, 2017)This thesis presents an automatic landing system designed for a fixed-wing unmanned aerial vehicle (UAV) to land in a net placed on ta ship. The UAV used is a Skywalker X8, a cheap and durable airframe, with a Pixhawk as ... -
UAV Path Planning for Ice Intelligence Purposes using NLP
(Master thesis, 2012)As the oil and shipping industry are interested in operating in arctic waters, the need for ice intelligence gathering is rising.The thesis describes the implentation and results of a path planning framework for an UAV ... -
UAV Path Planning for Maximum-Information Sensing in Spatiotemporal Data Acquisition
(Master thesis, 2017)Fixed-wing Unmanned Aerial Vehicles are extensively used for ground observation, as they allow for effective and precise methods of collecting information. They do however, have a downside as the quality of the information ... -
UAV path planning using MILP with experiments
(Journal article; Peer reviewed, 2017)In this paper, we look at the problem of tracking icebergs using multiple Unmanned Aerial Vehicles (UAVs). Our solutions use combinatorial optimization for UAV path planning by formulating a mixed integer linear programing ... -
UAV/UAS path planning for ice management information gathering
(Master thesis, 2011)The key objective of this work is the proposition of the path planning strategy for unmanned aerial vehicle (UAV) intended for information gathering in Arctic environments / ice-infested regions. Two different path planning ... -
Ultra-Wide Band Real Time Location Systems: Practical Implementation and Performance Evaluation
(Chapter, 2017)Several different methods can be used to determine the 3-dimensional position of an object. A common solution is use of Global Navigation Satellite System (GNSS). However, for some operation the specific characteristics ... -
Ultra-wideband Aided Inertial Navigation of an Indoor Robot
(Master thesis, 2020)Abstract will be available on 2023-07-06 -
Ultrasound Based Localization and Quantification of Skeletal Muscle Contraction
(Master thesis, 2014)Earlier experiments indicates that motor unit activity during isometric contractions can be imaged using a high-definition ultrasound scanner. In this study, ultrasound raw-data is analysed in MATLAB to localize and quantify ... -
Ultrasound Radiation Force for Increased Transport of Drugs in Cancer Tumors
(Master thesis, 2014)Cancer is today one of the leading causes of death world wide. Chemotherapy is a cancer treatment where cytotoxic drugs are administered intravenously in order to kill the cancer cells. This is a therapy form which is ... -
Ultrasound speckle reduction using generative adversial networks
(Journal article; Peer reviewed, 2018)Generative adversial networks (GANs) have shown its ability to create realistic and accurate image-to-image transformation. The goal of this work was to investigate whether deep convolutional GANs can learn to perform ... -
Ultrasound Strain Rate Imaging of Individual Muscle Motor Units
(Journal article; Peer reviewed, 2014)Skeletal muscle is organized in motor units, each comprising a motor neuron and all its connected muscle fibres. The arrival of an action potential (a neural “impulse”) causes the fibers to contract, they exhibit a twitch. ...