Heart rate regulation during cycle-ergometer exercise using damped parameter estimation method

• Published in: 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) Vol. 2016; pp. 2676 - 2679
• Main Authors: Argha, Ahmadreza, Lin Ye, Su, Steven W., Hung Nguyen, Celler, Branko G.
• Format: Conference Proceeding Journal Article
• Language: English
• Published: United States IEEE 01.08.2016
• Subjects: Adult; Biofeedback, Psychology; Biological control systems; Ergometry; Exercise; Exercise Test; Frequency conversion; Heart Rate; Humans; Male; Mathematical model; Models, Theoretical; Parameter estimation; Sliding mode control; Young Adult
• ISSN: 1557-170X
• DOI: 10.1109/EMBC.2016.7591281

This paper is devoted to the problem of heart rate regulation using a model-based control strategy and a realtime damped parameter estimation scheme. The controller is a time-varying integral sliding mode controller. A recursive damped parameter estimation method is also developed, by incorporation of a weighting upon the one-step parameter variation, which in contrast to the conventional parameter estimation schemes (e.g. recursive least squares (RLS) method) can avoid the occurrence of the so-called blowup phenomena. The calculated control signals are transmitted to the subjects employing a synchronized biofeedback mechanism. The proposed control and estimation scheme were experimentally verified using twelve healthy male subjects and the results demonstrated that the designed scheme is able to regulate the HR of the exercising subjects to a predetermined HR profile preventing overshooting in the HR responses.