Search results for: unbalanced accelerations

• Results of accelerometer measurements in rail passenger transport vehicles

  Open Research Data

  open access

  • M. Urbaniak
  • B. Nowak
  • K. Smoliński

  As part of the project, field research was done to better understand how unbalanced accelerations affect passenger comfort in rail transport and to compare this with passengers’ actual, subjective feelings. Data were collected from different types of rail vehicles, like trains and trams, using common mobile devices with MEMS accelerometer sensors.

• Ordinal pattern statistics for the assessment of heart rate variability

  Publication

  • G. Graff
  • B. Graff
  • A. Kaczkowska
  • D. Makowiec
  • J. Amigó
  • J. Piskorski
  • P. Guzik

  - The European Physical Journal-Special Topics - Year 2013

  The recognition of all main features of a healthy heart rhythm (the so-called sinus rhythm) is still one of the biggest challenges in contemporary cardiology. Recently the interesting physiological phenomenon of heart rate asymmetry has been observed. This phenomenon is related to unbalanced contributions of heart rate decelerations and accelerations to heart rate variability. In this paper we apply methods based on the concept...

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• Contr-rotating eccentric-mass rotors used as exciters of sinusoidal forces applied to elastically supported bodies

  Publication

  • K. Lipiński
  • M. K. Gerigk
  • R. Hein
  • G. Banaszek

  - Year 2022

  The work focuses on aspects of multibody dynamics. Investigated object is a mass driven by rotations of an inertial shaker. Resulting vibrational set consists of two counter-rotating identically-unbalanced rotors. Since the mass centres of the rotors do not coincide with the axes of their rotations, significant centrifugal forces arise during rotations. As both rotors are identically unbalanced, the inter-axial force components...

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