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Sijs, J. (author), Fletcher, J. (author)Robotic systems operating in the real world would benefit from a clear semantic model to understand their interactions with the real world. Such semantics are typically captured in an ontology. Unfortunately, the underlying model of existing ontologies requires many work-arounds before it can be used to capture general knowledge about objects...conference paper 2022
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Sijs, J. (author), Fletcher, J. (author)Robotic systems operating in the real world would benefit from a clear semantic model to understand the real world. Such semantics are typically captured in a knowledge structure. The speed at which robots need to update their real-world knowledge (because of new sensory observations) prevented the use of complex knowledge structures, due to...conference paper 2021
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Sijs, J. (author), van Vught, W. (author), Voogd, J. (author)Autonomous robots that operate in indoor, uncertain environments move around from one location to the next to fulfill a set of ordered task. To do so, they need a floor plan of the building to plan their route. In case the building is unfamiliar to a robot it can employ online mapping techniques, though these techniques are resource intensive...conference paper 2020
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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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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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Ananduta, W. (author), Pippia, T. (author), Ocampo-Martinez, C. (author), Sijs, J. (author), de Schutter, B. (author)A novel partitioning approach for linear switching large-scale systems is presented. We assume that the modes of the switching system are unknown a priori but can be detected. We propose an online partitioning scheme that can partition the system when the mode switches, thus adapting the partition to the mode. Moreover, after the system has been...article 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 paper, Mine Counter-Measures (MCM) operations with multiple cooperative Autonomous Underwater Vehicles (AUVs) are examined within the Distributed Constraint optimization Problem (DCOP) framework. The goal of an MCM-operation is to search for mines and mine-like objects within a predetermined area so that ships can pass the area through a...conference paper 2019
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Pippia, T. (author), Lago, J. (author), Coninck, R.D. (author), Sijs, J. (author), Schutter, B.D. (author)In the context of building heating systems control in office buildings, the current state-of-the-art applies either a deterministic Model Predictive Control (MPC) controller together with a nonlinear model, or a linearized model with a stochastic MPC controller. Deterministic MPC considers only one realization of the external disturbances, which...conference paper 2019
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Beckers, A.L.D. (author), Sijs, J. (author), van Diggelen, J. (author), van Dijk, Roelof J.E. (author), Bouma, H. (author), Lomme, M. (author), Hommes, R.M. (author), Hillerström, F.H.J. (author), van der Waa, J.S. (author), van Velsen, A.L. (author), Mannucci, T. (author), Voogd, J.M. (author), van Staal, W. (author), Veltman, H.J. (author), Wessels, P.W. (author), Huizing, A. (author)Intelligent robotic autonomous systems (unmanned aerial/ground/surface/underwater vehicles) are attractive for military application to relieve humans from tedious or dangerous tasks. These systems require awareness of the environment and their own performance to reach a mission goal. This awareness enables them to adapt their operations to...conference paper 2019
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Fransman, J. (author), Sijs, J. (author), Dol, H.S. (author), Theunissen, E. (author), de Schutter, B.D. (author)DCOP (Distributed Constraint optimization Problem) is a framework for representing distributed multi- agent problems. However, it only allows discrete values for the decision variables, which limits its application for real-world problems. In this paper, an extension of DCOP is investigated to handle variables with continuous domains....conference paper 2018
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Noack, B. (author), Sijs, J. (author), Hanebeck, U.D. (author)For decentralized fusion problems, ellipsoidal intersection has been proposed as an efficient fusion rule that provides less conservative results as compared to the well-know ovariance intersection method. Ellipsoidal intersection relies on the computation of a common estimate that is shared by the estimates to be fused. In this paper, an...conference paper 2017
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Noack, B. (author), Sijs, J. (author), Reinhardt, M. (author), Hanebeck, U.D. (author)In distributed and decentralized state estimation systems, fusion methods are employed to systematically combine multiple estimates of the state into a single, more accurate estimate. An often encountered problem in the fusion process relates to unknown common information that is shared by the estimates to be fused and is responsible for...article 2017
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Noack, B. (author), Sijs, J. (author), Reinhardt, M. (author), Hanebeck, U.D. (author)Distributed and decentralized processing and fusion of sensor data are becoming increasingly important. In view of the Internet of Things and the vision of ubiquitous sensing, designing and implementing multisensor state estimation algorithm have already become a key issue. A network of interconnected sensor devices is usually characterized by...bookPart 2017
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Noack, B. (author), Sijs, J. (author), Hanebeck, U.D. (author)Decentralized data fusion is a challenging task. Either it is too difficult to maintain and track the information required to perform fusion optimally, or too much information is discarded to obtain informative fusion results. A well-known solution is Covariance Intersection, which may provide too conservative fusion results. A less conservative...conference paper 2017
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Noack, B. (author), Sijs, J. (author), Hanebeck, U.D. (author)Distributed implementations of state estimation algorithms generally have in common that each node in a networked system computes an estimate on the entire global state. Accordingly, each node has to store and compute an estimate of the same state vector irrespective of whether its sensors can only observe a small part of it. In particular, the...conference paper 2014
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Sijs, J. (author), Kester, L.J.H.M. (author), Noack, B. (author)To reduce the amount of data transfer in networked systems measurements are usually taken only when an event occurs rather than periodically in time. However, a fundamental assessment on the response of estimation algorithms receiving event sampled measurements is not available. This research presents such an analysis when new measurements are...conference paper 2014
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van Leeuwen, C.J. (author), Sijs, J. (author), Papp, Z. (author)A sensor network operating under changing operational conditions will have to adapt to its environment, topology and system performance. In order to obtain this flexible behavior, a reconfiguration framework is proposed for distributed signal processing solutions. The considered example in this article is distributed Kalman filtering, whereas...conference paper 2013
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- Dekker, R.J. (author), Bouma, H. (author), den Breejen, E. (author), van den Broek, A.C. (author), Hanckmann, P. (author), Hogervorst, M.A. (author), Mohamoud, A.A. (author), Schoemaker, R.M. (author), Sijs, J. (author), Tan, R.G. (author), Toet, A. (author), Smith, A.J.E. (author) conference paper 2013
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Bakker, L.G. (author), Borsboom, W.A. (author), Sijs, J. (author), Fransman, J.E. (author)A model based indoor climate control concept is developed which improves the indoor comfort while saving energy. The controller developed within the EU-FP7 HERB project will automatically quantify key parameters describing the thermal balance of the building using a limited number of sensors and an adaptive statistical model. Aiming at large...conference paper 2013
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Sijs, J. (author), Hanebeck, U. (author), Noack, B. (author)State fusion is a method for merging multiple estimates of the same state into a single fused estimate. Dealing with multiple estimates is one of the main concerns in distributed state estimation, where an estimated value of the desired state vector is computed in each node of a networked system. Most solutions for distributed state estimation...conference paper 2013