Browsing Publikasjoner fra CRIStin - NTNU by Title
Now showing items 25540-25559 of 38679
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Optimal LQG Controller for Variable Speed Wind Turbine Based on Genetic Algorithms
(Journal article; Peer reviewed, 2012)Linear Quadratic Gaussian (LQG) control methodology shows useful properties of good performance and robust-ness in controller design applied to wind turbine. Typically, in the design procedure LQG method is necessary to ... -
Optimal Maintenance for Degrading Assets in the Context of Asset Fleets-A Case Study
(Peer reviewed; Journal article, 2020)Decision-making for maintenance of engineering assets is a common challenge in the process industry due to ongoing degradation. With an increasing company-size, this problem becomes more complex from an operational and ... -
Optimal Maintenance Scheduling for Washing of Compressors to Increase Operational Efficiency
(Peer reviewed; Journal article, 2019)The need for simultaneously decreasing carbon emissions and increasing operational profit motivates gas turbine and gas compressor operators to understand, minimize and control performance deterioration. Fouling is one of ... -
Optimal Management for Megawatt Level Electric Vehicle Charging Stations with a Grid Interface Based on Modular Multilevel Converter
(Peer reviewed; Journal article, 2021)This paper proposes a strategy to manage an electric vehicle charging station (EVCSs) with a grid-side interface based on a Modular Multilevel Converter (MMC). In such a system, heterogeneous behavior of electric vehicles ... -
Optimal management of ADHD in older adults
(Journal article; Peer reviewed, 2016)Background: The manifestation of attention-deficit/hyperactivity disorder (ADHD) among older adults has become an interesting topic of interest due to an increasing number of adults aged 50 years and older (≥50 years) ... -
Optimal management of green certificates in the Swedish-Norwegian market
(Journal article, 2017)We propose and investigate a valuation model for the income of selling tradeable green certificates (TGCs) in the Swedish–Norwegian market, formulated as a singular stochastic control problem. Our model takes into account ... -
Optimal Metric Search Is Equivalent to the Minimum Dominating Set Problem
(Chapter, 2020)In metric search, worst-case analysis is of little value, as the search invariably degenerates to a linear scan for ill-behaved data. Consequently, much effort has been expended on more nuanced descriptions of what performance ... -
Optimal microgrid operation considering battery degradation using stochastic dual dynamic programming
(Chapter, 2019)Intermittent energy sources demand temporal storages to balance generation and load, and batteries stand out as an alternative. However, the lifetime is limited, and cycling depth affects the battery degradation rate. ... -
Optimal Mission Planning for Fixed-Wing UAVs with Electro-Thermal Icing Protection and Hybrid-Electric Power Systems
(Chapter, 2020)Harsh weather conditions such as wind and icing are severe debilitators to the operations of unmanned aerial vehicles in terms of performance, safety and reliability. Forecasts of atmospheric parameters in the mission area ... -
Optimal Model-Based Trajectory Planning With Static Polygonal Constraints
(Peer reviewed; Journal article, 2021)The main contribution of this article is a novel method for planning globally optimal trajectories for dynamical systems subject to polygonal constraints. The proposed method is a hybrid trajectory planning approach, which ... -
Optimal Multiobjective Control of Low-Voltage AC Microgrids: Power Flow Regulation and Compensation of Reactive Power and Unbalance
(Journal article; Peer reviewed, 2019)The presence of single-phase distributed generators unevenly injecting active power in three-phase microgrids may create undesired upstream current unbalance. Consequently, voltage asymmetry and even active power curtailment ... -
Optimal Online Configuration and Load-Sharing in a Redundant Electric Power System for an Offshore Vessel Using Mixed Integer Linear Programming
(Chapter, 2018)This paper proposes several schemes for optimal online configuration and load sharing for a shipboard power system of a typical offshore vessel, having a number of varying capacity gensets. Different methods are presented ... -
Optimal Operation and Control of a Thermal Energy Storage System: Classical Advanced Control versus Model Predictive Control
(Peer reviewed; Journal article, 2020)The objective of this work is to define the optimal operation and control for a thermal storage system with heat sources and a consumer, which exchange utilities using one hot water thermal energy storage tank. In this ... -
Optimal operation and control of heat to power cycles: A new perspective from a systematic plantwide control approach
(Peer reviewed; Journal article, 2020)In this work, we use a plantwide control framework to systematically identify the control objectives, operational and environmental constraints, and degrees of freedom for a heat to power cycle with a drum, one pressure ... -
Optimal Operation and Control of Heat-to-Power Cycles: a New Perspective using a Systematic Plantwide Control Approach
(Journal article; Peer reviewed, 2019)We use a systematic plantwide control framework to analyze optimal operation of a simple heatto- power steam cycle with a single pressure level and a drum. The present control solutions for power plants1 have been developed ... -
Optimal Operation Mode Selection for Energy-efficient Light-weight Multi-hop Time Synchronization in Linear Wireless Sensor Networks
(Peer reviewed; Journal article, 2020)We explored the joint effect of synchronization window and offset/drift mode selection on the time synchronization of linear wireless sensor networks (LWSNs). Recent advances in the field along with the availability of ... -
Optimal operation of a subsea separation system including a coalescence based gravity separator model and a produced water treatment section
(Journal article; Peer reviewed, 2019)In this work, we develop a model for a gravity separator, and we use it together with models from the literature to study the control of a subsea separation system that separates oil, gas, and water from well fluids in ... -
Optimal Operation of Battery Storage for a Subscribed Capacity-Based Power Tariff Prosumer—A Norwegian Case Study
(Journal article; Peer reviewed, 2019)The cost of peak power for end-users subject to a demand charge may be substantial, expecting to increase further with the vast growth of power-demanding devices. In cases where load-shifting is not a viable option for ... -
Optimal Operation of Hydro-Dominated Power Systems with Environmental Constraints
(Chapter, 2022)This paper studies the operation of a small renewable and hydro-dominated power system when introducing environmental constraints. The risk of rationing and the local price formation is investigated using a stochastic, ... -
Optimal Operation with Changing Active Constraint Regions using Classical Advanced Control
(Journal article; Peer reviewed, 2018)With ”classical advanced control” we mean the control structures that are commonly used in industry for multivariable control. These have been in use for at least 50 years, but surprisingly there is little literature ...