Search Results - "Ikonen, Enso"

Fundamental Limitations of the Decay of Generalized Energy in Controlled (Discrete–Time) Nonlinear Systems Subject to State and Input Constraints by Selek, István, Ikonen, Enso

“…This paper is devoted to the analysis of fundamental limitations regarding closed-loop control performance of discrete-time nonlinear systems subject to hard…”
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Hybrid and cognitive digital twins for the process industry by Johansen, Stein Tore, Unal, Perin, Albayrak, Özlem, Ikonen, Enso, Linnestad, Kasper J., Jawahery, Sudi, Srivastava, Akhilesh K., Løvfall, Bjørn Tore

“…In a Europe that is undergoing digital transformation, the COGNITWIN project is contributing to accelerate the transformation and introduce Industry 4.0 to the…”
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Role of specific energy in decomposition of time-invariant least-cost reservoir filling problem by Selek, István, Ikonen, Enso

“…•Decomposition structure of the least-cost reservoir filling problem was examined.•Time-invariance and one dimensional state space imply decomposition…”
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Fouling monitoring in a circulating fluidized bed boiler using direct and indirect model-based analytics by Ikonen, Enso, Liukkonen, Mika, Hansen, Anders H., Edelborg, Mathias, Kjos, Ole, Selek, István, Kettunen, Ari

“…Fouling is a phenomenon where material accumulates on the exterior of convective heat exchangers (HX) and other surfaces. In boilers fired by waste-derived or…”
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Integrated control and process design for improved load changes in fluidized bed boiler steam path by Hultgren, Matias, Ikonen, Enso, Kovács, Jenő

“…[Display omitted] •Process and control design were integrated for a fluidized bed boiler steam path.•The steam storage distribution and feedback controllers…”
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Sizing of energy storage for hybrid power plants aiming for turbine stress reduction under FCR-N requirements by Vasara, Joni, Selek, István, Ikonen, Enso

“…This paper examines the storage sizing for hybrid power plants providing the Frequency Containment Reserve (FCR) for power grid balancing, where the…”
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Generalized orthogonalization: a unified framework for Gram-Schmidt orthogonalization, SVD and PCA by Selek, Istvan, Vasara, Joni, Ikonen, Enso

“…This paper contributes to the understanding of orthogonalization approaches widely used in system identification, signal processing, machine learning, and…”
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Process control using finite Markov chains with iterative clustering by Ikonen, Enso, Selek, István, Najim, Kaddour

“…•Finite state MDP provide a viable alternative for process control.•An iterative re-discretization is proposed based on clustering of closed-loop data.•An…”
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Oxidant control and air-oxy switching concepts for CFB furnace operation by Hultgren, Matias, Ikonen, Enso, Kovács, Jenö

“…•The oxy combustion CCS CO2 capture technology was investigated in CFB power plants.•Oxy- and air-firing were compared, focusing on process dynamics and…”
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Self-optimizing control structure design in oxy-fuel circulating fluidized bed combustion by Niva, Laura, Ikonen, Enso, Kovács, Jenö

“…•Self-optimizing control was applied in a circulating fluidized bed boiler.•Steady-state approximations of a validated dynamic CFB model were used.•Method…”
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Heat exchanger fouling estimation for combustion-thermal power plants including load level dynamics by Neuvonen, Markus, Selek, Istvan, Ikonen, Enso, Aho, Lauri

“…This paper presents a robust soft sensor for estimating heat exchanger fouling in combustion-thermal power plant context. The approach is data-driven and…”
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Once-through Circulating Fluidized Bed Boiler Control Design with the Dynamic Relative Gain Array and Partial Relative Gain by Hultgren, Matias, Ikonen, Enso, Kovács, Jenő

“…Combustion power plants currently face major performance challenges, which require robust control design methods. Extensive relative gain analysis was…”
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Multiple Model-Based Control Using Finite Controlled Markov Chains by Ikonen, Enso, Najim, Kaddour

“…Cognition and control processes share many similar characteristics, and decisionmaking and learning under the paradigm of multiple models has increasingly…”
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Calibration of Physical Models with Process Data using FIR Filtering by Ikonen, Enso, Selek, Istvan

“…Automatic calibration of physical plant models in the context of monitoring and control of industrial processes is considered. A structure integrating a…”
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Stress Reduction of Turbine Units in Hybrid Power Plants: an Operational Perspective by Vasara, Joni, Selek, Istvan, Ikonen, Enso

“…This paper develops an operation strategy for hybrid power production units (turbine integrated with energy storage) participating in the balancing of the…”
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Asymptotic analysis of a control-oriented open channel flow model by Vasara, Joni, Selek, Istvan, Ikonen, Enso

“…This paper presents the development and mathematical analysis of an open-channel flow model. A tanks-in-series model relying on systems engineering…”
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On the bounds of the fastest admissible decay of generalized energy in controlled LTI systems subject to state and input constraints by Selek, Istvan, Ikonen, Enso

“…This paper contributes to the field of Lyapunov stability theory where positive definite radially unbounded functions - which can be interpreted as generalized…”
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Estimating Fuel Characteristics from Simulated Circulating Fluidized Bed Furnace Data by Neuvonen, Markus, Selek, Istvan, Ikonen, Enso

“…This paper proposes a soft sensor to estimate the elementary fuel characteristics in combustion-thermal power plants. The proposed approach is data-driven. The…”
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Dynamic Modelling and Optimization of a Supermarket CO2 Refrigeration System for Demand Side Management by Ikonen, Enso, Selek, Istvan

“…Model-based optimization tools for demand side management using supermarket refrigeration systems are considered. A model for medium-sized supermarket freezer…”
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On-line estimation of circulating fluidized bed boiler fuel composition by Ikonen, Enso, Neuvonen, Markus, Selek, Istvan, Salo, Mikko, Liukkonen, Mika

“…Estimation of power plant fuel input fractions based on unscented Kalman filtering using a first principles simulation model of the furnace is considered. The…”
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