Blar i NTNU Open på forfatter "Brodtkorb, Astrid H."
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Response predictions using the observed autocorrelation function
Nielsen, Ulrik Dam; Brodtkorb, Astrid H.; Jensen, Jørgen Juncher (Journal article; Peer reviewed, 2018)This article studies a procedure that facilitates short-time, deterministic predictions of the waveinduced motion of a marine vessel, where it is understood that the future motion of the vessel is calculated ahead of time. ... -
Sea state estimation using model-scale DP measurements
Brodtkorb, Astrid H.; Nielsen, Ulrik Dam; Sørensen, Asgeir Johan (Chapter, 2015)Complex marine operations are moving further from shore, into deeper waters, and harsher environments. The operating hours of a vessel are weather dependent, and good knowledge of the prevailing weather conditions may ... -
Sea state estimation using multiple ships simultaneously as sailing wave buoys
Nielsen, Ulrik Dam; Brodtkorb, Astrid H.; Sørensen, Asgeir Johan (Journal article; Peer reviewed, 2019)The article presents initial ideas towards a network-based approach for sea state estimation used for marine operations and other maritime applications. In principle, all available means, ranging from in situ buoys, fleet ... -
Sea State Estimation Using Quadratic Discriminant Analysis and Partial Least Squares Regression
Arneson, Ina Bjørkum; Brodtkorb, Astrid H.; Sørensen, Asgeir Johan (Journal article; Peer reviewed, 2019)This paper proposes non-model based sea state estimation methods for a dynamically positioned vessel. Sea state estimation entails finding the wave direction, significant wave height and peak wave period and is done based ... -
Sea state estimation using vessel response in dynamic positioning
Brodtkorb, Astrid H.; Nielsen, Ulrik Dam; Sørensen, Asgeir Johan (Journal article; Peer reviewed, 2018)This paper presents a novel method for estimating the sea state parameters based on the heave, roll and pitch response of a vessel conducting station keeping automatically by a dynamic positioning (DP) system, i.e., without ... -
Sensor-based Hybrid Observer for Dynamic Positioning
Brodtkorb, Astrid H.; Teel, Andrew R.; Sørensen, Asgeir Johan (Chapter, 2015)Observers are important components of dynamic positioning (DP) systems for marine vessels, estimating unmeasured states, filtering noise, filtering out wave induced motions, and predicting states in the case of signal loss. ... -
Ship motion-based wave estimation using a spectral residual-calculation
Nielsen, Ulrik Dam; Brodtkorb, Astrid H. (Chapter, 2018)This paper presents a study focused on a newly developed procedure for wave spectrum estimation using wave-induced motion recordings from a ship. The particular procedure stands out from other existing, similar ship ... -
Simultaneous sea state estimation and transfer function tuning using a network of dynamically positioned ships
Mounet, Raphaël Emile Gilbert; Nielsen, Ulrik Dam; Brodtkorb, Astrid H.; Tannuri, Eduardo A.; de Mello, Pedro C. (Peer reviewed; Journal article, 2022)This paper presents a study focused on wave spectrum estimation in practical scenarios where multiple ships operate in the same geographical area, potentially forming a network of wave recorders. A novel methodology is ... -
Time-Varying Model-Based Observer for Marine Surface Vessels in Dynamic Positioning
Værnø, Svenn Are Tutturen; Brodtkorb, Astrid H.; Skjetne, Roger; Vincenzo, Calabro (Journal article; Peer reviewed, 2017)This paper deals with the problem of transient events in model-based observers for dynamic positioning of marine surface vessels. Traditionally, model-based observers experience a deterioration of performance during ... -
Tuning of transfer functions for analysis of wave–ship interactions
Nielsen, Ulrik Dam; Mounet, Raphaël Emile Gilbert; Brodtkorb, Astrid H. (Peer reviewed; Journal article, 2021)Transfer functions are often used together with a wave spectrum for analysis of wave–ship interactions, where one application addresses the prediction of wave-induced motions or other types of global responses. This paper ...