Acceleration feedback improves balancing against reflex delay

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

A model for human postural balance is considered in which the time-delayed feedback depends on position, velocity and acceleration (proportional- derivative-acceleration (PDA) feedback). It is shown that a PDA controller is equivalent to a predictive controller, in which the prediction is based on the most recent information of the state, but the control input is not involved into the prediction. A PDA controller is superior to the corresponding proportional-derivative controller in the sense that the PDA controller can stabilize systems with approximately 40 per cent larger feedback delays. The addition of a sensory dead zone to account for the finite thresholds for detection by sensory receptors results in highly intermittent, complex oscillations that are a typical feature of human postural sway.

Original languageEnglish
Article number20120763
JournalJournal of the Royal Society Interface
Volume10
Issue number79
DOIs
Publication statusPublished - Feb 6 2013

Fingerprint

Reflex
Derivatives
Feedback
Controllers
Postural Balance
Sensory Receptor Cells

Keywords

  • Acceleration feedback
  • Human balancing
  • Reflex delay
  • Sensory threshold

ASJC Scopus subject areas

  • Biophysics
  • Biotechnology
  • Bioengineering
  • Biomedical Engineering
  • Biomaterials
  • Biochemistry
  • Medicine(all)

Cite this

Acceleration feedback improves balancing against reflex delay. / Insperger, T.; Milton, John; Stépán, G.

In: Journal of the Royal Society Interface, Vol. 10, No. 79, 20120763, 06.02.2013.

Research output: Contribution to journalArticle

@article{49dbfe283ad74964b92f299f6811a009,
title = "Acceleration feedback improves balancing against reflex delay",
abstract = "A model for human postural balance is considered in which the time-delayed feedback depends on position, velocity and acceleration (proportional- derivative-acceleration (PDA) feedback). It is shown that a PDA controller is equivalent to a predictive controller, in which the prediction is based on the most recent information of the state, but the control input is not involved into the prediction. A PDA controller is superior to the corresponding proportional-derivative controller in the sense that the PDA controller can stabilize systems with approximately 40 per cent larger feedback delays. The addition of a sensory dead zone to account for the finite thresholds for detection by sensory receptors results in highly intermittent, complex oscillations that are a typical feature of human postural sway.",
keywords = "Acceleration feedback, Human balancing, Reflex delay, Sensory threshold",
author = "T. Insperger and John Milton and G. St{\'e}p{\'a}n",
year = "2013",
month = "2",
day = "6",
doi = "10.1098/rsif.2012.0763",
language = "English",
volume = "10",
journal = "Journal of the Royal Society Interface",
issn = "1742-5689",
publisher = "Royal Society of London",
number = "79",

}

TY - JOUR

T1 - Acceleration feedback improves balancing against reflex delay

AU - Insperger, T.

AU - Milton, John

AU - Stépán, G.

PY - 2013/2/6

Y1 - 2013/2/6

N2 - A model for human postural balance is considered in which the time-delayed feedback depends on position, velocity and acceleration (proportional- derivative-acceleration (PDA) feedback). It is shown that a PDA controller is equivalent to a predictive controller, in which the prediction is based on the most recent information of the state, but the control input is not involved into the prediction. A PDA controller is superior to the corresponding proportional-derivative controller in the sense that the PDA controller can stabilize systems with approximately 40 per cent larger feedback delays. The addition of a sensory dead zone to account for the finite thresholds for detection by sensory receptors results in highly intermittent, complex oscillations that are a typical feature of human postural sway.

AB - A model for human postural balance is considered in which the time-delayed feedback depends on position, velocity and acceleration (proportional- derivative-acceleration (PDA) feedback). It is shown that a PDA controller is equivalent to a predictive controller, in which the prediction is based on the most recent information of the state, but the control input is not involved into the prediction. A PDA controller is superior to the corresponding proportional-derivative controller in the sense that the PDA controller can stabilize systems with approximately 40 per cent larger feedback delays. The addition of a sensory dead zone to account for the finite thresholds for detection by sensory receptors results in highly intermittent, complex oscillations that are a typical feature of human postural sway.

KW - Acceleration feedback

KW - Human balancing

KW - Reflex delay

KW - Sensory threshold

UR - http://www.scopus.com/inward/record.url?scp=84872254948&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84872254948&partnerID=8YFLogxK

U2 - 10.1098/rsif.2012.0763

DO - 10.1098/rsif.2012.0763

M3 - Article

VL - 10

JO - Journal of the Royal Society Interface

JF - Journal of the Royal Society Interface

SN - 1742-5689

IS - 79

M1 - 20120763

ER -