Now showing items 1-5 of 5
Multi-source data collection for state-of-the-art data analysis from ground-proximate images in sea ice classification
(Peer reviewed; Conference object; Bok; Konferansebidrag; Book, 2017-08-08)
In modern data analysis it is imperative to use well maintained data sources with curated content. This publication gives an approach for research areas, where there is no such central facility. The specific area used here is sea ice classification from images. The publication is split into two parts. The first part describes the integration of discontinuous sources for different aspects of data ...
Dual-quaternion backstepping control for a fully-actuated rigid-body
(Peer reviewed; Book; Chapter, 2018-08-16)
In this paper dual-quaternions are used to model a fully actuated rigid-body. A backstepping-controller that solves the trajectory tracking problem is derived and proved to provide uniform asymptotical stabilization of the error dynamics. Numerical simulations are provided where the controller is compared to existing dual-quaternion tracking controllers and it is shown to have similar performance.
Curvature Continuous Path Generation for UAVs based on Generalized Expo-Rational B-Splines
(Peer reviewed; Book; Chapter, 2018)
This paper proposes a new path-planning algorithm based on GERBS to generate curvature continuous paths. The algorithm blends between a set of local curves generating a global smooth path which also interpolates the midpoint of the curves. Numerical examples are provided which demonstrates the potential of the proposed algorithm.
A Comparative Study of Different Control Structures for Flight Control with New Results
(Peer reviewed; Book; Chapter, 2018-10-24)
This paper presents several different control structures that facilitate flight control and does a comparison between them. Specifically, this paper considers command-filtered backstepping, nonlinear dynamic inversion (NDI), and a new decoupled approach that decouples the rotational and translational dynamics by estimating the higher order derivatives of the angle of attack and sideslip angle. The ...
Quaternion Path-Following in Three Dimensions for a Fixed-Wing UAV Using Quaternion Blending
(Peer reviewed; Book; Chapter, 2018-10-29)
This paper presents a three dimensional guidance strategy for fixed-wing UAVs using quaternions. The algorithm is based on constructing two quaternions, one which makes the UAV fly towards the path and one that makes the UAV follow the path. These two quaternions are then blended together such that the path-following objective is reached. The guidance algorithm is applied to a simple kinematic model ...