Blar i Øvrige samlinger på tittel
Viser treff 24681-24700 av 39647
-
Nonlinear interaction between clustered unstable thermoacoustic modes in can-annular combustors
(Peer reviewed; Journal article, 2020)A can-annular combustor consists of a set of nominally identical cans, in which the flames burn in an essentially isolated manner. However, adjacent cans are able to communicate acoustically, which provides dynamic coupling ... -
Nonlinear local structural modelling and analysis of the interface for a hybrid wind and wave energy converter concept
(Journal article; Peer reviewed, 2016)A hybrid wind and wave energy converter concept, which consists of a spar floating wind turbine and a coaxial wave energy converter named the STC (Spar Torus Combination) concept, has been proposed to achieve better ... -
Nonlinear mechanical behaviour of Ba0.5Sr0.5Co0.8Fe0.2O3 − δ and in situ stress dependent synchrotron X-ray diffraction study
(Journal article; Peer reviewed, 2017)Perovskite type Ba0.5Sr0.5Co0.8Fe0.2O3 − δ ceramics display nonlinear stress-strain behaviour upon uniaxial compression at room temperature. Step functional loading experiments show that the nonlinear strain response of ... -
Nonlinear Model Predictive Attitude Control for Fixed-Wing Unmanned Aerial Vehicle
(Chapter, 2019)Exploiting the physical limitations on the maneuverability of a fixed-wing Unmanned Aerial Vehicle (UAV) and simultaneously respecting its flight envelope and actuator constraints is a demanding task, for which Nonlinear ... -
Nonlinear Model Predictive Control of Electrical Submersible Pumps based on Echo State Networks
(Peer reviewed; Journal article, 2022)Employed for artificial lifting in oil well production, Electrical Submersible Pumps (ESP) can be operated with Model Predictive Control (MPC) to drive an optimal production, while ensuring a safe operation and respecting ... -
A nonlinear model predictive control scheme for sensor fault tolerance in observation processes
(Peer reviewed; Journal article, 2020)This article addresses the problem of designing a sensor fault‐tolerant controller for an observation process where a primary, controlled system observes, through a set of measurements, an exogenous system to estimate the ... -
Nonlinear model predictive control with explicit back-offs for Gaussian process state space models
(Chapter, 2019)Nonlinear model predictive control (NMPC) is an efficient control approach for multivariate nonlinear dynamic systems with process constraints. NMPC does however require a plant model to be available. A powerful tool to ... -
Nonlinear Model Predictive Growth Control of a Class of Plant-Inspired Soft Growing Robots
(Peer reviewed; Journal article, 2020)Recently, researchers have shown an increased interest in considering plants as a model of inspiration for designing new robot locomotions. Growing robots, that imitate the biological growth presented by plants, have proved ... -
Nonlinear model-based control of two-phase flow in risers by feedback linearization
(Journal article, 2013)Active control of the production choke valve is the recommended solution to prevent severe slugging flow conditions at offshore oilfields. The slugging flow constitutes an unstable and highly nonlinear system; the gain of ... -
Nonlinear modeling and control for an evaporator unit
(Journal article; Peer reviewed, 2018)This article presents a nonlinear modeling approach describing the enthalpy dynamics between the inlet of the economizer and the outlet of the evaporator in a once-through boiler. The model is used to design an LQG controller ... -
Nonlinear modelling of aerodynamic self-excited forces: An experimental study
(Peer reviewed; Journal article, 2021)The bridge aerodynamics research community is currently discussing several nonlinear wind load models for bridge decks, but no definite conclusion on which model is superior to the others is currently available. In this ... -
Nonlinear modelling of aerodynamic self-excited forces: An experimental study
(Peer reviewed; Journal article, 2021)The bridge aerodynamics research community is currently discussing several nonlinear wind load models for bridge decks, but no definite conclusion on which model is superior to the others is currently available. In this ... -
Nonlinear observer design for a Greitzer compressor model
(Chapter, 2013)In this paper two different observers for a nonlinear compressor model have been developed and compared: A nonlinear observer based on a circle criterion design and an Extended Kalman Filter. Both of these observers ... -
Nonlinear observer design for GNSS-aided inertial navigation systems with time-delayed GNSS measurements
(Journal article; Peer reviewed, 2017)Global navigation satellite system (GNSS) receivers suffer from an internal time-delay of up to several hundred milliseconds leading to a degeneration of position accuracy in high-dynamic systems. With the increasing ... -
Nonlinear Observer for Tightly Coupled Integrated Inertial Navigation Aided by RTK-GNSS Measurements
(Journal article; Peer reviewed, 2018)A modular nonlinear observer is considered for tightly coupled integration of inertial measurements with global satellite measurements. A real-time-kinematic (RTK) approach is utilized where the rover and base station ... -
Nonlinear Observer for Tightly Integrated Inertial Navigation Aided by Pseudo-Range Measurements
(Journal article; Peer reviewed, 2017)A modular nonlinear observer for inertial navigation aided by pseudo-range measurements is designed and analyzed. The attitude observer is based on a recent nonlinear complementary filter that uses magnetometer and ... -
Nonlinear Observer with Time-Varying Gains for Inertial Navigation Aided by Satellite Reference Systems in Dynamic Positioning
(Journal article, 2014)The measurement quality of Global Navigation Satellites Systems (GNSS) during marine operations will vary over time. Inherently, GNSS quality changes should be handled when GNSS is utilized as aid in inertial navigation ... -
Nonlinear Observers for Integrated INS/GNSS Navigation – Implementation Aspects
(Journal article, 2017)Navigation is a term with broad usage in everyday life and can mean the act of moving, moving through an unknown environment, ascertaining a craft's position, or even browsing on the Internet. Originally, the term meant ... -
Nonlinear optical microscopy of early stage (ICRS Grade-I) osteoarthritic human cartilage
(Journal article; Peer reviewed, 2015) -
Nonlinear optical properties of polycrystalline silicon core fibers from telecom wavelengths into the mid-infrared spectral region
(Journal article; Peer reviewed, 2019)Polycrystalline silicon core fibers (SCFs) fabricated via the molten core drawing (MCD) method are emerging as a flexible optoelectronic platform. Here, the optical transmission properties of MCD SCFs that have been tapered ...