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Pippia, T. (author), Sijs, J. (author), de Schutter, B. (author)A single-level rule-based model predictive control (RBMPC) scheme is presented for optimizing the energy management of a grid-connected microgrid composed of local production units, renewable energy sources, local loads, and several types of energy storage systems (ESSs). The single-level controller uses two different models that yield different...article 2020
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Dekker, N.J.J. (author), Jansen, M.J. (author), Burgers, A.R. (author), Dörenkämper, M.S. (author), Jonkman, R. (author), van der Ven, R. (author), Gramsbergen, E. (author)The most simple grid connected PV system consists of a series connection of PV modules, connected to a string inverter. The power output of such a system can be sensitive to shade on a PV module. Also limited shade on a part of a cell can lead to high temperatures in that shaded cell, a so-called hotspot. The effect of shade can be reduced by...conference paper 2020
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Barros, E.G.D. (author), Chitu, A. (author), Leeuwenburgh, O. (author)The general field development optimization problem is complex due to the potentially large number of controls of mixed type and discontinuities in the objective function related to varying numbers and types of wells being placed in a discretized grid. This may make the problem challenging or even unsuitable for certain types of optimization...article 2020
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vanden Berg, F. (author), Camra, V. (author), Hendriks, M. (author), Geilen, M. (author), Hnetynka, P. (author), Manteca, F. (author), Sanchez, P. (author), Bures, T. (author), Basten, T. (author)Cyber-physical systems (CPS) are complex, heterogeneous, and dynamic systems, spanning hardware and software components ranging from edge devices to cloud platforms. CPS need to satisfy many rigorous constraints, e.g., with respect to deadlines, safety, and quality, yielding a large configuration space where only a limited number of...conference paper 2020
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Nicoreac, M.P. (author), Courage, W.M.G. (author), Kempker, P.L. (author)The support structures of offshore wind turbines (OWTs) are difficult to inspect due to the environmental conditions and difficult access to structural parts. The inspection and maintenance cost are therefore high, providing a good motivation for further optimizing the planning and costs for these actions. In the context of the FeLoSeFI project,...article 2020
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Ramaswamy, K.R. (author), Fonseca, R.M. (author), Leeuwenburgh, O. (author), Siraj, M.M. (author), van den Hof, P.M.J. (author)We are concerned with the efficiency of stochastic gradient estimation methods for large-scale nonlinear optimization in the presence of uncertainty. These methods aim to estimate an approximate gradient from a limited number of random input vector samples and corresponding objective function values. Ensemble methods usually employ Gaussian...article 2020
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Scapino, L. (author), de Servi, C. (author), Zondag, H.A. (author), Diriken, J. (author), Rindt, C.C.M. (author), Sciacovelli, A. (author)Sorption thermal energy storage (STES) has the potential to have higher energy densities and lower thermal losses compared to conventional thermal storage technologies, and it can contribute to increase the energy grid flexibility and the penetration of intermittent and distributed energy sources. However, STES is a technology still under...article 2020
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van Putten, B.J.C. (author), van der Sanden, B. (author), Reniers, M. (author), Voeten, J. (author), Schiffelers, R (author)One of the challenges in the design of supervisors with optimal throughput for manufacturing systems is the presence of behavior outside the control of the supervisor. Uncontrollable behavior is typically encountered in the presence of (user) inputs, external disturbances, and exceptional behavior. This paper introduces an approach for the...conference paper 2020
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Sioutas, S. (author), Stuijk, S. (author), Basten, T. (author), Corporaal, H. (author), Somers, L. (author)The Halide DSL and compiler have enabled high-performance code generation for image processing pipelines targeting heterogeneous architectures through the separation of algorithmic description and optimization schedule. However, automatic schedule generation is currently only possible for multi-core CPU architectures. As a result, expert...conference paper 2020
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Nadolski, V. (author), Rózsás, Á. (author), Sýkora, M. (author)Partial factors are commonly based on expert judgements and on calibration to previous design formats. This inevitably results in unbalanced structural reliability for different types of construction materials, loads and limit states. Probabilistic calibration makes it possible to account for plentiful requirements on structural performance,...article 2019
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Kahrobaei, S.S. (author), Fonseca, R.M. (author), Willems, C.J.L. (author), Wilschut, F. (author), Wees, J.D.A.M. (author)In the geothermal energy domain, it is common practice to drill a doublet (i.e. an injection and production well pair) system for heat production from the subsurface. Injector-producer spacing typically varies between 1 to 2 km. This well spacing distance is usually chosen through engineering judgement. The concept of drilling doublet systems is...conference paper 2019
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Fransman, J.E. (author), Sijs, J. (author), Dol, H.S. (author), Theunissen, E. (author), de Schutter, B. (author)In this work, the novel algorithm Bayesian Dynamic Programming Optimization Procedure (B-DPOP) is presented to solve multi-agent problems within the Distributed Constraint Optimization Problem framework. The Bayesian optimization framework is used to prove convergence to the global optimum of the B-DPOP algorithm for Lipschitz-continuous...conference paper 2019
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Medina, R. (author), Valencia, J. (author), Stuijk, S. (author), Goswami, D. (author), Basten, T. (author)Pipelined image-based control uses parallel instances of its image-processing algorithm in a pipelined fashion to improve the quality of control. A performance-oriented control design improves the controller settling time with each additional processing resource, which creates a resources-performance trade-off. In real-life applications, it is...article 2019
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Hildmann, H. (author), Kovacs, E. (author), Saffre, F. (author), Isakovic, A.F. (author)Unmanned Aerial Vehicles (UAVs) with acceptable performance are becoming commercially available at an affordable cost. Due to this, the use of drones for real-time data collection is becoming common practice by individual practitioners in the areas of e.g., precision agriculture and civil defense such as fire fighting. At the same time, as UAVs...article 2019
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Katliar, M. (author), Olivari, M. (author), Drop, F.M. (author), Nooij, S. (author), Diehl, M. (author), Bülthoff, H.H. (author)This paper presents a method to simultaneously compute optimal simulator motions and simulator parameters for a predefined set of vehicle motions. The optimization can be performed with a model of human motion perception or sensory dynamics taken into account. The simulator dynamics, sensory dynamics, and optimality criterion are provided by the...article 2019
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Bruijns, L.A.M. (author), Phillipson, F. (author), Sangers, A. (author)We provide a method to obtain a User Equilibrium in a transportation network, in which we transport containers for multiple agents. The User Equilibrium solution is defined as the solution wherein each agent can travel via their cheapest paths possible, and no agent is harmed by the route choice of other agents. The underlying model used is the...conference paper 2019
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Saffre, F. (author), Gianini, G. (author), Hildmann, H. (author), Davies, J. (author), Bullock, S. (author), Damiani, E. (author), Deneubourg, J.L. (author)We investigate the hypothesis that long-term memory in populations of agents can lead to counterproductive emergent properties at the system level. Our investigation is framed in the context of a discrete, one-dimensional road-traffic congestion model: we investigate the influence of simple cognition in a population of rational commuter agents...article 2019
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- Sagastizabal, R. (author), Bonet-Monroig, X. (author), Singh, M. (author), Rol, M.A. (author), Bultink, C.C. (author), Fu, X. (author), Price, C.H. (author), Ostroukh, V.P. (author), Muthusubramanian, N. (author), Bruno, A. (author), Beekman, M. (author), Haider, N. (author), O'Brien, T.E. (author), Dicarlo, L. (author) article 2019
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van Kooten, M. (author), Doelman, N.J. (author), Kenworthy, M. (author)For high-contrast imaging systems, the time delay is one of the major limiting factors for the performance of the extreme adaptive optics (AO) sub-system and, in turn, the final contrast. The time delay is due to the finite time needed to measure the incoming disturbance and then apply the correction. By predicting the behavior of the...article 2019
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Constrained multivariable extremum-seeking for online fuel-efficiency optimization of Diesel enginesvan der Weijst, R. (author), van Keulen, T. (author), Willems, F.P.T. (author)This work presents a new method for online fuel-efficiency optimization of Diesel engines, using constrained extremum-seeking. A two-input optimization problem, which is suitable for extremum-seeking, is integrated into a tracking control system. As a result, both air-path and fuel-path actuators are used for tracking and extremum-seeking. A key...article 2019