Browsing Institutt for teknisk kybernetikk by Author "Andersen, Joakim Rostrup"
Now showing items 1-6 of 6
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Application of Data-Driven Economic NMPC on a Gas Lifted Well Network
Andersen, Joakim Rostrup; Imsland, Lars Struen (Journal article; Peer reviewed, 2021)The Daily Production Optimization (DPO) problem is the task of maximizing production of hydrocarbons subject to operational constraints. Handling of uncertainty in model structure and parameters is of high importance to ... -
Bilevel programming as a means of infinite weighting in regression problems
Andersen, Joakim Rostrup; Imsland, Lars Struen (Journal article; Peer reviewed, 2022)Linear regression is concerned about fitting a model to a set of data. The weighted least squares method is a standard tool for performing linear regression. In this paper, we focus on the case when some of the samples are ... -
Contributions to optimizing control – Inspired by challenges in oil and gas production
Andersen, Joakim Rostrup (Doctoral theses at NTNU;2023:127, Doctoral thesis, 2023)This dissertation treats optimization and control with emphasis on oil and gas applications, and consists of an introduction followed by five main contributions. In the first contribution, we focus on allocating a limited ... -
Data-driven derivative-free trust-region model-based method for resource allocation problems
Andersen, Joakim Rostrup; Imsland, Lars Struen; Pavlov, Alexey (Peer reviewed; Journal article, 2023)Allocating a limited available resource between a set of units is a problem that arises in several application areas. We propose an online derivative-free trust-region model-based method to tackle a fairly general version ... -
Extending a derivative-free model-based trust-region optimization algorithm to account for constraints and partial gradient information - Application to oil field development
Andersen, Joakim Rostrup (Master thesis, 2018)This master's thesis is motivated by the oil field development challenge. This is a very big and complicated task and only one part of it will be in focus, namely, the well placement challenge. When planning a new oil field ... -
Real time optimization of systems with fast and slow dynamics using a lookahead strategy
Andersen, Joakim Rostrup; Silva, Thiago Lima; Imsland, Lars Struen; Pavlov, Alexey (Chapter, 2020)Systems with fast and slow dynamics give rise to objectives in different time scales which may not be aligned. The existing dynamic optimal control methods might become computationally infeasible due to the fine discretization ...