Browsing NTNU Open by Author "Haring, Mark"
Now showing items 1-10 of 10
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A dither-free extremum-seeking control approach using 1st-order least-squares fits for gradient estimation
Hunnekens, Bram; Haring, Mark; van de Wouw, Nathan; Nijmeijer, Hendrik (Conference object, 2014) -
A homotopy-based moving horizon estimation
Abdollahpouri, Mohammad; Quirynen, Rien; Haring, Mark; Johansen, Tor Arne; Takacs, Gergely; Diehl, Moritz; Rohal-Ilkiv, Boris (Journal article; Peer reviewed, 2019)Moving horizon estimation (MHE) solves a constrained dynamic optimisation problem. Including nonlinear dynamics into an optimal estimation problem generally comes at the cost of tackling a non-convex optimisation problem. ... -
A homotopy-based moving horizon estimation
Abdollahpouri, Mohammad; Quirynen, Rien; Haring, Mark; Johansen, Tor Arne; Takács, Gergely; Diehl, Moritz; Rohal'-Ilkiv, Boris (Journal article; Peer reviewed, 2017)Moving horizon estimation (MHE) solves a constrained dynamic optimisation problem. Including nonlinear dynamics into an optimal estimation problem generally comes at the cost of tackling a non-convex optimisation problem. ... -
Asymptotic stability of perturbation-based extremum-seeking control for nonlinear plants
Haring, Mark; Johansen, Tor Arne (Journal article; Peer reviewed, 2016)Abstract—We introduce a perturbation-based extremum-seeking controller for general nonlinear dynamical plants withan arbitrary number of tunable plant parameters. The controllerensures asymptotic convergence of the ... -
Double Moving Horizon Estimation: Linearization by a Nonlinear Transformation
Abdollahpouri, Mohammad; Haring, Mark; Johansen, Tor Arne; Takács, Gergely; Rohal'-Ilkiv, Boris (Chapter, 2018)Moving horizon estimation (MHE) is a con- strained non-convex optimization problem in principle, which needs to be solved online. One approach to avoid dealing with several local minima is to linearize the nonlinear dynamics. ... -
Extremum-Seeking Control for Harmonic Mitigation in Electrical Grids of Marine Vessels
Haring, Mark; Skjong, Espen; Johansen, Tor Arne; Molinas, Marta (Journal article; Peer reviewed, 2019)This paper focuses on the minimization of the harmonic distortion in multibus electrical grids of marine vessels using a single active power filter. An active power filter is commonly used for local harmonic mitigation. ... -
Extremum-seeking control for steady-state performance optimization of nonlinear plants with time-varying steady-state outputs
Hazeleger, Leroy; Haring, Mark; van de Wouw, Nathan (Journal article; Peer reviewed, 2018)Extremum-seeking control is a useful tool for the steady-state performance optimization of plants for which the dynamics and disturbance situation can be unknown. The case when steady-state plant outputs are constant ... -
Nonlinear State and Parameter Estimation using Discrete-Time Double Kalman Filter
Abdollahpouri, Mohammad; Haring, Mark; Johansen, Tor Arne; takacs, gergely; Rohal-Ilkiv, B (Journal article; Peer reviewed, 2017)Dealing with nonlinear dynamics in conventional estimation methods like the extended Kalman filter (EKF) is challenging, since they are not guaranteed to have global convergence, and their instability can arise by selecting ... -
On the accuracy of gradient estimation in extremum-seeking control using small perturbations
Haring, Mark; Johansen, Tor Arne (Journal article; Peer reviewed, 2018)In many extremum-seeking control methods, perturbations are added to the parameter signals to estimate derivatives of the objective function (that is, the steady-state parameter-to-performance map) in order to optimize the ... -
Practical extremum-seeking control for gas-lifted oil production
Pavlov, Alexey; Haring, Mark; Fjalestad, Kjetil (Chapter; Conference object, 2017)We present a distributed extremum seeking algorithm for the problem of production optimization of multiple gas lifted wells. The algorithm is based on “synchronization” of production performance gradients for all individual ...