Publications
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Clustering conditions and the cluster formation process in a dynamical model of multidimensional attracting agents Ghent University
Cluster formation in a time-varying multi-agent system Ghent University
Coexistence of stable stationary behavior and partial synchrony in an all-to-all coupled spiking neural network Ghent University
Adjusting the energy thresholds of a nonlinear vibration absorber Ghent University
Transient excitations are known to be a source of severe damage to the vital components (flexible couplings, gear boxes) of a dredger drive line. A possible means to mitigate the re-sulting vibration amplitudes is the attachment of a vibration absorber. As the classical linear absorber is only efficient for a single vibration mode, a strongly nonlinear variant has re-cently been proposed allowing a multimodal vibration reduction. An important ...
Emergence and evolution of multiple clusters of attracting agents Ghent University
Feasibility of nonlinear absorbers for transient vibration reduction Ghent University
Torsional vibrations are a cause of severe damage to flexible couplings and gearboxes of a dredger drive line. In this paper the feasibility of three different vibration absorbers is discussed when reducing transient vibrations originating from sudden load changes. The classical linear absorber is compared to two nonlinear ones, one with a cubic spring (known as the nonlinear energy sink or NES) and one with a combination of a linear and a cubic ...
Clustering in a network of non-identical and mutually interacting agents Ghent University
Clustering is a phenomenon that may emerge in multi-agent systems through self-organization: groups arise consisting of agents with similar dynamic behaviour. It is observed in fields ranging from the exact sciences to social and life sciences; consider, for example, swarm behaviour of animals or social insects, the dynamics of opinion formation or the synchronization (which corresponds to cluster formation in the phase space) of coupled ...
Multi-robot coverage to locate fixed and moving targets Ghent University
This paper develops an algorithm that guides a multi-robot system in an unknown environment searching for targets. The targets can be either fixed or moving. In order to locate all fixed targets and intercept all moving targets, the algorithm covers the entire free space in a sweeping fashion. No cellular decomposition of the area is performed. Communication between the robots is restricted. Two robots sense each other up to a maximum ...
Analyzing the dynamics of the nonlinear absorber Ghent University
A possible means to reduce vibrations in a main structure is the local attachment of an extra (damped) spring-mass system. This so called tuned mass damper (or vibration absorber), is most effective when mitigating sinusoidal excitations. It loses efficiency when transient vibrations (e.g. shock) need to be reduced. Furthermore, it is tuned to a single frequency which limits its use when multiple vibration modes have a significant contribution ...