Journal: at - Automatisierungstechnik

Abbreviation

Automatisierungstechnik

Publisher

De Gruyter

Journal Volumes

ISSN

0178-2312
2196-677X

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Publications 1 - 10 of 22
  • Common-mode rejection in the measurement of wearable ECG with cooperative sensors
    Item type: Journal Article
    Rapin, Michaël; Regamey, Yves-Julien; Chételat, Olivier (2018)
    at - Automatisierungstechnik
    Recently, telemonitoring of vital signs has gained a lot of research interest. Especially for electrocardiogram (ECG), which is among the most frequently measured vital sign. However, the integration of classical ECG Holter in wearables is problematic since shielded cables and gel electrodes are required to get ECG signals of highest quality. We have recently introduced a novel sensing architecture based on active electrodes (so-called cooperative sensors) that significantly reduces the cabling complexity of the monitoring device. After briefly recalling the principle of cooperative sensors this paper details how they address rejection of common-mode voltage induced by electromagnetic disturbances. The proposed approach uses an auto-identification technique based on a continuous-time calibration of the sensor system and a digital control loop. To demonstrate the reliability of the proposed approach, a 12-lead ECG monitoring system was implemented with the new common-mode rejection method. Measurements on four healthy volunteers showed that the signal quality obtained with the cooperative-sensor system (using dry electrodes) is equivalent to the one measured with a gold standard medical device (using gel electrodes) in exercise stress tests.
  • Special Issue: Medical Robotics
    Item type: Other Journal Item
    Georg Rauter; Manuela Eugster (2025)
    at - Automatisierungstechnik
  • Mit Methode raus aus dem Stau
    Item type: Other Journal Item
    Helbing, Dirk; Janschek, Klaus (2001)
    at - Automatisierungstechnik
  • IoT business models in an industrial context
    Item type: Review Article
    Weinberger, Markus; Bilgeri, Dominik; Fleisch, Elgar (2016)
    at - Automatisierungstechnik
    here is a broad consensus that the transforma-tive power of the Internet of Things (IoT) will affect allkinds of industries; or, to put it in a more optimistic light,that almost no domain is excluded from the opportuni-ties to leverage the IoT. But, what does this mean for thefuture of industrial processes? This article introduces theconcept of high-resolution management (HRM). IoT en-ables the collection of high-resolution data for the phys-ical world where, as in the digital world, every aspect ofbusiness operations can be measured in real-time. Thiscapability facilitates high-resolution management, suchas short optimization cycles in industrial production, lo-gistics and equipment efficiency, comparable to methodslike A/B-Testing or Search Engine Optimization, which arestate of the art in digital business. We take the followingtwo perspectives on leveraging high-resolution manage-ment. First, through greater insights into their industrialprocesses, companies that apply HRM in their operationsare able to achieve higher efficiency, quality and flexibil-ity. The example of vehicle fleet management illustratesthis effect. Second, we buildupon the St. Gallen BusinessModel Navigator in order to look in greater detail on howthe IoT affects industrial processes. Gassmann et al.¹in-troduce55generic business model patterns, of which our xtended research identified20that could profit signifi-cantly from the IoT².Analyzingthese20patterns allowedfor the identificationof six key components:Remote Usageand Condition Monitoring,Object Self Service,Digital Add-on,Digital Lock-in,Product as a Point of SalesandPhysicalFreemium. These building blocks help companies to sup-ply HRM-supported offerings. Finally, the example of re-mote monitoring of process parameters shows that thesebusiness model components can also be deployed to cre-ate offerings that enable others to apply HRM.
  • Exoskeleton transparency: feed-forward compensation vs. disturbance observer
    Item type: Journal Article
    Just, Fabian; Özen, Özhan; Bösch, Philipp; et al. (2018)
    at - Automatisierungstechnik
  • Microsimulations of freeway traffic including control measures
    Item type: Journal Article
    Treiber, Martin; Helbing, Dirk (2001)
    at - Automatisierungstechnik
  • Score rectification for online assessments in robot-assisted arm rehabilitation
    Item type: Journal Article
    Sommerhalder, Michael; Zimmermann, Yves; Knecht, Manuel; et al. (2022)
    at - Automatisierungstechnik ~ Special issue: AUTOMED 2021: Automation in Medical Technology
    Relative comparison of clinical scores to measure the effectiveness of neuro-rehabilitation therapy is possible through a series of discrete measurements during the rehabilitation period within specifically designed task environments. Robots allow quantitative, continuous measurement of data. Resulting robotic scores are also only comparable within similar context, e.g. type of task. We propose a method to decouple these scores from their respective context through functional orthogonalization and compensation of the compounding factors based on a data-driven sensitivity analysis of the user performance. The method was validated for the established accuracy score with variable arm weight support, provoked muscle fatigue and different task directions on 6 participants of our arm exoskeleton group on the ANYexo robot. In the best case, the standard deviation of the assessed score in changing context could be reduced by a factor of 3.2. Therewith, we paved the way to context-independent, quantitative online assessments, recorded autonomously with robots.
  • Minimal invasives in-situ Bioprinting mittels schlauchbasiertem Materialtransport
    Item type: Journal Article
    Tomooka, Yukiko; Spothelfer, Dominic; Puiggali-Jou, Anna; et al. (2023)
    at - Automatisierungstechnik ~ Special Issue: Minimal-invasive Robotics
    Minimally invasive in situ bioprinting can potentially enhance the advantages of bioprinting, allowing the surrounding healthy tissue to be maximally preserved. However, the requirements for such a device are manifold and challenging to fulfill. We present an experimental bioprinting platform consisting of an extrusion system based on a tube mounted between an extrusion syringe and a dispensing nozzle. We investigated the influence of material transfer through a tube on the printing outcome. The results showed that it is feasible to form a continuous filament and print 3-dimensional structures using the developed platform.
  • Automation Technical Procedures for the Medicine
    Item type: Other Journal Item
    Simanski, Olaf; Schauer, Thomas; Riener, Robert (2016)
    at - Automatisierungstechnik
  • Selected numerical methods to model the fractional-order system behavior of nonlaminated magnetic actuators
    Item type: Journal Article
    Seifert, Robert; Hecht, Martin; Hofmann, Wilfried (2023)
    at - Automatisierungstechnik
    Nonlaminated magnetic actuators are highly influenced by eddy currents and minor perturbations like e. g. hysteresis. Known analytical models lead to trans-cendental system descriptions with fractional-order characteristics, not suited for the actuator control. Although analytical approximations resolve the issue, the inclusion of minor perturbations leads to impractical model orders, which require simplifications and compromise the model accuracy. This article studies numerical methods to directly approximate the transcendental systems or measurement data, allowing for a high accuracy with sufficiently low orders. We improve existing approaches like Levy's method and vector fitting and apply them to a fractional-order system. Using measurement data, a comparison shows that the numerical approaches match or excel our previously studied analytical approximations.
Publications 1 - 10 of 22