Blar i Publikasjoner fra CRIStin på forfatter "Dalen, Christer"

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    • A Novel Process-Reaction Curve Method for Tuning PID Controllers 

      Dalen, Christer; Di Ruscio, David Luigi (Journal article; Peer reviewed, 2018)
      A novel process-reaction curve method for tuning PID controllers for (possible) higher order processes/models is presented. The proposed method is similar to the Ziegler-Nichols process reaction curve method, viz. only the ...

    • A Semi-Heuristic Process-Reaction Curve PID Controller Tuning Method 

      Dalen, Christer; Di Ruscio, David Luigi (Journal article; Peer reviewed, 2018)
      A simple semi-heuristic method for designing PID controllers for time constant models are shown to be close to optimal. A Process-Reaction Curve method is proposed, composed by a method for approximating stable time constant ...

    • Model-Free PI/PID Controller Tuning of Higher Order Nonlinear Dynamic Systems 

      Dalen, Christer; Di Ruscio, David Luigi (Peer reviewed; Journal article, 2019)
      This paper concerns model-free PI/PID controller tuning of possible (nonlinear) higher order systems. The method can be considered as a three-step procedure. The first step is to persistently excite the system in open loop ...

    • On closed loop transient response system identification 

      Dalen, Christer; Ruscio, David Luigi Di (Journal article; Peer reviewed, 2016)
      Some methods for transient closed loop step response system identification presented in the literature are reviewed. Interestingly some errors in a method published in the early 80’s where propagated into a recently published ...

    • 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 ...

    • Tuning PD and PID Controllers for Double Integrating Plus Time Delay Systems 

      Ruscio, David Luigi Di; Dalen, Christer (Journal article; Peer reviewed, 2017)
      An existing method for tuning a PI controller for an integrating plus time delay plant are extended to be used for the design of a PD controller for a double integrating plus time delay plant. The PD controller is extended ...