Now showing items 132-151 of 192

    • Parameter and State Estimation of Large-Scale Complex Systems Using Python Tools 

      Perera, M. Anushka S.; Hauge, Tor Anders; Pfeiffer, Carlos Fernando (Journal article; Peer reviewed, 2015)
      This paper discusses the topics related to automating parameter, disturbance and state estimation analysis of large-scale complex nonlinear dynamic systems using free programming tools. For large-scale complex systems, ...
    • Parameter estimation for externally simulated thermal network models 

      Brastein, Ole Magnus; Lie, Bernt; Sharma, Roshan; Skeie, Nils-Olav (Peer reviewed; Journal article, 2019)
      Obtaining accurate dynamic models of building thermal behaviour requires a statistically solid foundation for estimating unknown parameters. This is especially important for thermal network grey-box models, since all their ...
    • Parameter estimation for grey-box models of building thermal behaviour 

      Brastein, Ole Magnus; Perera, Degurunnehalage Wathsala U.; Pfeiffer, Carlos Fernando; Skeie, Nils-Olav (Journal article; Peer reviewed, 2018)
      Good models for building thermal behaviour are an important part of developing building energy management systems that are capable of reducing energy consumption for space heating through model predictive control. A popular ...
    • PCR/PLSR optimization based on noise covariance estimation and Kalman filtering theory 

      Ergon, Rolf; Esbensen, Kim H. (Journal article; Peer reviewed, 2002)
      The theoretical connection between principal component regression (PCR) and partial least squares regression (PLSR) on one hand and Kalman filtering (KF) on the other is known from earlier work. In the present paper we ...
    • PD/PID controller tuning based on model approximations: Model reduction of some unstable and higher order nonlinear models 

      Dalen, Christer; Di Ruscio, David Luigi (Journal article; Peer reviewed, 2017)
      A model reduction technique based on optimization theory is presented, where a possible higher order system/model is approximated with an unstable DIPTD model by using only step response data. The DIPTD model is used to ...
    • Performance optimal PI controller tuning based on integrating plus time delay models 

      Dalen, Christer; Di Ruscio, David Luigi (Journal article; Peer reviewed, 2018)
      A method for tuning PI controller parameters, a prescribed maximum time delay error or a relative time delay error is presented. The method is based on integrator plus time delay models. The integral time constant is linear ...
    • PLS post-processing by similarity transformation: a simple alternative to OPLS 

      Ergon, Rolf (Journal article; Peer reviewed, 2005)
      Several methods for orthogonal signal correction (OSC) based on pre-processing of the modeling data have been developed in recent years, and OPLS (orthogonal projections to latent structures) is a well known algorithm. ...
    • PLS score-loading correspondence and a bi-orthogonal factorization 

      Ergon, Rolf (Journal article; Peer reviewed, 2002)
      It is established industrial practice to use the correspondence between partial least squares (PLS) scores and loadings or loading weights as a means for process monitoring and control. Deviations from the normal operating ...
    • Population balance modelling for fertilizer granulation process 

      Vesjolaja, Ludmila; Glemmestad, Bjørn; Lie, Bernt (Journal article; Peer reviewed, 2018)
      Few granulation plants are operated optimally. It is common to operate granulation plants below their maximum design capacity, and in many cases, periodic instabilities may also occur. From a process control and optimization ...
    • Power System Stability Using Modelica 

      Øyvang, Thomas; Winkler, Dietmar; Lie, Bernt; Hegglid, Gunne John (Conference object; Peer reviewed, 2014-12-09)
      This paper is concerned with power system modeling using the Modelica language in comparison to a traditional simulation tool. Though most common power system simulation tools are computationally efficient and reasonably ...
    • Pressure wave propagation in Managed Pressure Drilling- model comparison with real life data 

      Berg, Christian; Stakvik, Jon Åge; Lie, Bernt; Vågsæther, Knut; Kaasa, Glenn-Ole (Peer reviewed; Journal article, 2019)
      Drilling for oil and gas is a complex process, involving pumping of fluid through kilometers of pipes. Even though the drilling fluid has a high speed of sound (˜1000 m/s), the large lengths involved make pressure wave ...
    • Project work as an integrating and revenue-making tool 

      Clausen, Trond (Conference object, 1998)
      The Engineering College at Høgskolen i Telemark has since 1982 practised cooperative learning as the model of promoting student learning. It has earlier been shown that the Telemark Model do enhance many aspects of learning ...
    • Quantitative genetics state-space modeling of phenotypic plasticity and evolution 

      Ergon, Rolf Otto Torbjørn (Peer reviewed; Journal article, 2019)
      Living organisms adapt to changes in environment by phenotypic plasticity and evolution by natural selection (or they migrate). At detailed genetic levels these phenomena are complicated, and quantitative genetics attempts ...
    • Raman Spectroscopy as an Online Monitoring Tool for CO2 Capture Process: Demonstration Using a Laboratory Rig 

      Jinadasa, Wathsala; Jens, Klaus-Joachim; Øi, Lars Erik; Halstensen, Maths (Journal article; Peer reviewed, 2017)
      A laboratory CO2 capture rig at USN was used as a demonstration plant to show the feasibility of Raman spectroscopy for online monitoring of speciation in CO2 capture process. The spectroscopy was integrated to lean and ...
    • Re-interpretation of NIPALS results solves PLSR inconsistency problem 

      Ergon, Rolf (Journal article; Peer reviewed, 2009)
      The well-known nonlinear iterative partial least squares (NIPALS) algorithm is commonly used for computation of components in partial least squares regression (PLSR) with orthogonalized score vectors. Based on generalized ...
    • Reactive Power Control of Grid Interactive Battery Energy Storage System for WADC 

      Torkzadeh, Roozbeh; Chamorro, Harold; Rye, Rebecca; Eliassi, Mojtaba; Toma, Lucian; Gonzalez-Longatt, Francisco (Chapter, 2019)
      The integration of Grid Interactive Battery Energy Storage Systems (GI-BESSs) in energy services, such as peak shaving and load balancing, is a common practice in the modern-day electric power system. However, it is essential ...
    • A Real-Time Flow-Measuring Algorithm for Open Venturi Channel Non-Newtonian Flow 

      Welahettige, Prasanna Kumara Welahetti; Lie, Bernt; Vågsæther, Knut (Peer reviewed; Journal article, 2019)
      A real-time flow measuring algorithm is developed for the open Venturi channel non-Newtonian flow measurement. Using a single level sensor reading at downstream of the open Venturi channel, a drilling-well return flow rate ...
    • Recruiting competence from vocational schools : paradise regained? 

      Clausen, Trond; Hagen, Svein Thore; Hasleberg, Harald (Conference object, 2004)
      After a period of declining student enrolment, in 2002 Telemark University College (TUC) took advantage of vocational schools reforms to establish a three years bachelor programme in electrical engineering for a pilot ...
    • Recruiting engineering students from vocational school 

      Clausen, Trond; Hagen, Svein Thore; Hasleberg, Harald; Aarnes, Jens Harald (Conference object, 2003)
      By the consent of the Norwegian Ministry of Education and Research, Telemark University College (TUe), Porsgrunn, Norway, this fall semester started a pilot class in electrical engineering recruiting solely from vocational ...
    • Reduced PCR/PLSR models by subspace projections 

      Ergon, Rolf (Journal article; Peer reviewed, 2006)
      Latent variables models used in principal component regression (PCR) or partial least squares regression (PLSR) often use a high number of components, and this makes interpretation of score and loading plots difficult. ...