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Robust control of heart rate for cycle ergometer exercise
The objective was to assess the performance and robustness of a novel strategy for automatic control of heart rate (HR) during cycle ergometry. Control design used a linear plant model and direct shaping of the closed-loop input-sensitivity function to achieve an appropriate response to disturbances...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6828638/ https://www.ncbi.nlm.nih.gov/pubmed/31471785 http://dx.doi.org/10.1007/s11517-019-02034-6 |
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author | Hunt, Kenneth J. Hurni, Cédric C. |
author_facet | Hunt, Kenneth J. Hurni, Cédric C. |
author_sort | Hunt, Kenneth J. |
collection | PubMed |
description | The objective was to assess the performance and robustness of a novel strategy for automatic control of heart rate (HR) during cycle ergometry. Control design used a linear plant model and direct shaping of the closed-loop input-sensitivity function to achieve an appropriate response to disturbances attributable to broad-spectrum heart rate variability (HRV). The controller was evaluated in 73 feedback control experiments involving 49 participants. Performance and stability robustness were analysed using a separately identified family of 73 plant models. The controller gave highly accurate and stable HR tracking performance with mean root-mean-square tracking error between 2.5 beats/min (bpm) and 3.1 bpm, and with low average control signal power. Although plant parameters varied over a very wide range, key closed-loop transfer functions remained invariant to plant uncertainty in important frequency bands, while infinite gain margins and large phase margins (> 62(∘)) were preserved across the whole plant model family. Highly accurate, stable and robust HR control can be achieved using LTI controllers of remarkably simple structure. The results highlight that HR control design must focus on disturbances caused by HRV. The input-sensitivity approach evaluated in this work provides a transparent method of addressing this challenge. [Figure: see text] |
format | Online Article Text |
id | pubmed-6828638 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-68286382019-11-18 Robust control of heart rate for cycle ergometer exercise Hunt, Kenneth J. Hurni, Cédric C. Med Biol Eng Comput Original Article The objective was to assess the performance and robustness of a novel strategy for automatic control of heart rate (HR) during cycle ergometry. Control design used a linear plant model and direct shaping of the closed-loop input-sensitivity function to achieve an appropriate response to disturbances attributable to broad-spectrum heart rate variability (HRV). The controller was evaluated in 73 feedback control experiments involving 49 participants. Performance and stability robustness were analysed using a separately identified family of 73 plant models. The controller gave highly accurate and stable HR tracking performance with mean root-mean-square tracking error between 2.5 beats/min (bpm) and 3.1 bpm, and with low average control signal power. Although plant parameters varied over a very wide range, key closed-loop transfer functions remained invariant to plant uncertainty in important frequency bands, while infinite gain margins and large phase margins (> 62(∘)) were preserved across the whole plant model family. Highly accurate, stable and robust HR control can be achieved using LTI controllers of remarkably simple structure. The results highlight that HR control design must focus on disturbances caused by HRV. The input-sensitivity approach evaluated in this work provides a transparent method of addressing this challenge. [Figure: see text] Springer Berlin Heidelberg 2019-08-30 2019 /pmc/articles/PMC6828638/ /pubmed/31471785 http://dx.doi.org/10.1007/s11517-019-02034-6 Text en © The Author(s) 2019 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
spellingShingle | Original Article Hunt, Kenneth J. Hurni, Cédric C. Robust control of heart rate for cycle ergometer exercise |
title | Robust control of heart rate for cycle ergometer exercise |
title_full | Robust control of heart rate for cycle ergometer exercise |
title_fullStr | Robust control of heart rate for cycle ergometer exercise |
title_full_unstemmed | Robust control of heart rate for cycle ergometer exercise |
title_short | Robust control of heart rate for cycle ergometer exercise |
title_sort | robust control of heart rate for cycle ergometer exercise |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6828638/ https://www.ncbi.nlm.nih.gov/pubmed/31471785 http://dx.doi.org/10.1007/s11517-019-02034-6 |
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