Blar i NTNU Open på forfatter "Hovd, Morten"

Viser treff 61-80 av 85

    • Modelling of Fast Beam-Ion Instability in Future Accelerators 

      Grønvold, Fredrik Sommerfelt (Master thesis, 2023)
      Fremtidige akseleratorer som den kompakte lineære kollideren (CLIC) forventes å være sårbare for fenomenet fast beam-ion instability (FBII) på grunn av deres høye stråleintensitet og små tverrgående strålestørrelse. I ...

    • Non-Linear Model Predictive Control for Modular Multilevel Converters 

      Hamayoon, Saad; Hovd, Morten; Suul, Jon Are Wold (Chapter, 2022)
      In this paper, non-linear model predictive control (NMPC) without an explicit modulator is applied to modular multilevel converters (MMCs) in the abc reference frame. NMPC can easily be extended for longer prediction ...

    • On the impact of additive disturbances on Auto-Steering Systems 

      Ballesteros-Tolosana, I.; Olaru, Sorin; Rodriguez-Ayerbe, P.; Hovd, Morten; Deborne, R.; Pita-Gil, G. (Journal article; Peer reviewed, 2017)
      Several control techniques are available for the automotive systems and their design is often based on the available measurements of different parameters and the integration of the hard input and performance constraints. ...

    • Optimal energiproduksjon i fjernvarmesystemer 

      Loraas, Marius (Master thesis, 2021)
      Innledningsvis gis det en oversikt over sentrale tema innenfor fagfeltet fjernvarme. Det utarbeides en matematisk formulering av effekttariffen som Tensio praktiserer for strømkunder i Trøndelag sør. Effekttariffen formuleres ...

    • Parameter-dependent PWQ Lyapunov function stability criteria for uncertain piecewise linear systems 

      Hovd, Morten; Olaru, S (Journal article; Peer reviewed, 2018)
      Abstract: The calculation of piecewise quadratic (PWQ) Lyapunov functions is addressed in view of stability analysis of uncertain piecewise linear dynamics. As main contribution, the linear matrix inequality (LMI) approach ...

    • PI controller tuning based on historical data 

      Michaelsen, Håvard Skytt (Master thesis, 2013)
      The effects on PI controller tuning related to information quality in input-output datahave been investigated. This is relevant as many industrial control systems store thiskind of data and it is desirable to be able to ...

    • Plant-wide oscillation detection using multivariate empirical mode decomposition 

      Aftab, Muhammad Faisal; Hovd, Morten; Sivalingam, Selvanathan (Journal article; Peer reviewed, 2018)
      Plant-wide oscillation detection is an important task in the maintenance of large-scale industrial control systems, owing to the fact that in an interactive multi-loop environment oscillation generated in one loop may ...

    • Predictive Monitoring of Basic Oxygen Steel Refining 

      Dyrdal, Bent Martin (Master thesis, 2018)
      With the late focus on digitalisation and industry 4.0, many industries have significantly evolved. More instrumentation and automation has led to better maintenance planning, more efficient production and increased safety. ...

    • Process Data Mining for Parameter Estimation: With the DYNIA Method 

      Fordal, Arnt Ove (Master thesis, 2010)
      Updating the model parameters of the control system of an oil and gas production system for the reasons of cost-effectiveness and production optimization, requires a data set of input and output values for the system ...

    • Quadratic programming with ramp functions and fast online QP-MPC solutions 

      Valmorbida, Giorgio; Hovd, Morten (Peer reviewed; Journal article, 2023)
      A novel method is proposed for solving quadratic programming problems arising in model predictive control. The method is based on an implicit representation of the Karush–Kuhn–Tucker conditions using ramp functions. The ...

    • Run til run optimalisering av trekkhastighet i Czochralski-prosessen ved bruk av MPC-algoritme 

      Braseth, Stein Angel (Master thesis, 2015)
      Denne oppgaven utforsker bruk av en MPC-algoritme til å regulere trekkhastigheten i en standard Czochralski-prosess. En introduksjon av prosessen med vekt på delene som er relatert til reguleringsteknikk er gitt. Det ...

    • Run-To-Run control of the Czochralski process 

      Rahmanpour, Parsa; Sælid, Steinar; Hovd, Morten (Journal article; Peer reviewed, 2017)
      Commercially, the Czochralski process plays a key role in production of monocrystalline silicon for semiconductor and solar cell applications. However, it is a highly complex batch process which requires careful control ...

    • Safe implementation of advanced process control on Edvard Grieg 

      Aslam, Waleed (Master thesis, 2020)
      Master oppgaven omhandler sikker implementering av en model prediktiv kontroller på Edvard Grieg. En sikkerhetsanalyse basert på feil-tre, hendelses-tre, HAZOP og risikomatrise er brukt for å fremheve eventuelle farekilder ...

    • Sensorimotor Synchronization - Modeling human response to step changes: Using continuous transfer functions 

      Forbord, Jon (Master thesis, 2010)
      The purpose of this thesis is to explore the possibility of continuous modeling of rhythm production. To do this it is assumed that the irregular time intervals of rhythm production can be regarded as irregular samples of ...

    • Simultaneous input & state estimation, singular filtering and stability 

      Abooshahab, Mohammad Ali; Alyaseen, Mohammed M.J.; Bitmead, Robert R.; Hovd, Morten (Peer reviewed; Journal article, 2021)
      Input estimation is a signal processing technique associated with deconvolution of measured signals after filtering through a known dynamic system. Kitanidis and others extended this to the simultaneous estimation of the ...

    • Stabilisering av slug-strømning ved bruk av topside-målinger og ulineær MPC 

      Hatlen, Sten Even Smoge (Master thesis, 2008)
      Riser-indusert slugging er et strømningsmønster som kan oppstå i flerfase strømning i stigerøret opp til oljeplattformer og karakteriseres av vesentlige strømnings- og trykkvariasjoner. Den støtvise strømningen forårsaket ...

    • Stability Assessment of Power Systems Based on a Robust Sum-of-Squares Optimization Approach 

      Kalemba, Lester; Uhlen, Kjetil; Hovd, Morten (Chapter, 2018)
      Secure operation of the evolving power systems, characterised by more renewable energy sources and increasingly variable consumption, will require enhanced monitoring and more automatic control actions. One example is the ...

    • Stabilizing Slug Control Using Subsea Choke Valve 

      Lieungh, Mats (Master thesis, 2012)
      This thesis study the possibility of riser slugging control in oshore oil productionusing a subsea choke valve. A 5-state simplied model of a well-pipelinerisersystem is introduced and tted to a reference model in the ow ...

    • Stick-Slip Prevention of Drill Strings Using Nonlinear Model Reduction and Nonlinear Model Predictive Control 

      Johannessen, Morten Krøtøy; Myrvold, Torgeir (Master thesis, 2010)
      The main focus of this thesis is aspects in the development of a system for prevention of stick-slip oscillations in drill strings that are used for drilling oil wells. Stick-slip is mainly caused by elasticity of the drill ...

    • Stiksjonsdeteksjon med Receding Horizon Estimation 

      Roscher-Nielsen, Nils Christian (Master thesis, 2008)
      Denne oppgaven er et forsøk på å bruke Receding Horizon Estimation til å detektere stiksjon, ved å fungere som parameterestimator. Hovedvekten av oppgaven har ligget på å implementere en algoritme som estimerer gitte ...