12 research outputs found
Performance of a web transport system with tension control subsystem using speed as control input
No full text41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015, Yokohama, Japan, 9-12 Nov. 2015In this paper, the authors improve the control performance of a multi-span web transport system by introducing a new decentralized control strategy using the overlapping decomposition. The system is composed of eleven guide rollers, four main sections mutually interconnected with each other. The overlapping decomposition requires a derivative action on the controlled variables. All the theoretical aspects will be shown together with the preliminary experimental results demonstrating the improvements of the proposed approach
710 Structural Health Monitoring System of Wide Flange Beam by Impedance Measurement Method
No full text
A Gain Scheduling of PI Controllers of a Multi Span Web Transport System
No full textAbstract
This research aims to address the issue of controlling a multi-span web transport system by an automatic tuning of the PI controllers parameters. The use of multi-span web transport systems often requires dedicating a particular effort for defining a control system able to protect the integrity of the web. The possibility of using PI controllers for each section is attractive considering that an overlapping system decomposition may permit to take into account the mutual interaction of the neighbor sections. In this case, the choice of correct values of the PI parameters becomes crucial for the control performance. Existing fixed gain PI tension control schemes currently used in industrial practice require extensive tuning and do not provide the desired performance for changing operating conditions. This paper describes a simple strategy for automatically selecting the PI parameters of a multi span transport system by using an nonlinear interpolation of the trend of a preliminary calibration. The algorithm is simple and efficient providing fast real-time implementation, since it does not require any data processing. The proposed technique features robustness and simplicity. The implications of this method reside in its applicability in an industrial platform.</jats:p
Performance of a web transport system with tension control subsystem using speed as control input
No full textIn this paper, the authors improve the control performance of a multi-span web transport system by introducing a new decentralized control strategy using the overlapping decomposition. The system is composed of eleven guide rollers, four main sections mutually interconnected with each other. The overlapping decomposition requires a derivative action on the controlled variables. All the theoretical aspects will be shown together with the preliminary experimental results demonstrating the improvements of the proposed approach.41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015, Yokohama, Japan, 9-12 Nov. 201
Performance of a web transport system with tension control subsystem using speed as control input
No full textIn this paper, the authors improve the control performance of a multi-span web transport system by introducing a new decentralized control strategy using the overlapping decomposition. The system is composed of eleven guide rollers, four main sections mutually interconnected with each other. The overlapping decomposition requires a derivative action on the controlled variables. All the theoretical aspects will be shown together with the preliminary experimental results demonstrating the improvements of the proposed approach.41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015, Yokohama, Japan, 9-12 Nov. 2015conference pape
Persistent fluctuations in stride intervals under fractal auditory stimulation
No full textCopyright @ 2014 Marmelat et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits
unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.Stride sequences of healthy gait are characterized by persistent long-range correlations, which become anti-persistent in the presence of an isochronous metronome. The latter phenomenon is of particular interest because auditory cueing is generally considered to reduce stride variability and may hence be beneficial for stabilizing gait. Complex systems tend to match their correlation structure when synchronizing. In gait training, can one capitalize on this tendency by using a fractal metronome rather than an isochronous one? We examined whether auditory cues with fractal variations in inter-beat intervals yield similar fractal inter-stride interval variability as isochronous auditory cueing in two complementary experiments. In Experiment 1, participants walked on a treadmill while being paced by either an isochronous or a fractal metronome with different variation strengths between beats in order to test whether participants managed to synchronize with a fractal metronome and to determine the necessary amount of variability for participants to switch from anti-persistent to persistent inter-stride intervals. Participants did synchronize with the metronome despite its fractal randomness. The corresponding coefficient of variation of inter-beat intervals was fixed in Experiment 2, in which participants walked on a treadmill while being paced by non-isochronous metronomes with different scaling exponents. As expected, inter-stride intervals showed persistent correlations similar to self-paced walking only when cueing contained persistent correlations. Our results open up a new window to optimize rhythmic auditory cueing for gait stabilization by integrating fractal fluctuations in the inter-beat intervals.Commission of the European Community and the Netherlands Organisation for Scientific Research
Author Correction: High-sensitivity acceleration sensor detecting micro-mechanomyogram and deep learning approach for parkinson’s disease classification
No full text
