Authors:
Teddy M. Cheng
1
;
Andrey V. Savkin
1
;
Branko G. Celler
1
;
Steven W. Su
2
and
Lu Wang
1
Affiliations:
1
School of Electrical Engineering and Telecommunications, the University of New South Wales, Australia
;
2
Faculty of Engineering, the University of Technology, Australia
Keyword(s):
Heart rate modelling, heart rate control, nonlinear systems, exercise physiology.
Related
Ontology
Subjects/Areas/Topics:
Biomedical Engineering
;
Biomedical Signal Processing
;
Physiological Processes and Bio-Signal Modeling, Non-Linear Dynamics
Abstract:
In this study, a nonlinear system was developed for the modelling of the heart rate response to treadmill walking exercise. The model is a feedback interconnected system which can represent the neural response and peripheral local response to exercise. The parameters of the model were identified from an experimental study which involved 6 healthy adult male subjects, each completed 3 sets of walking exercise at different speeds. The proposed model will be useful in explaining the cardiovascular response to exercise. Based on the model, a 2-degree-of-freedom controller was developed for the regulation of the heart rate response during exercise. The controller consists of a piecewise LQ and an H∞ controllers. Simulation results showed that the proposed controller had the ability to regulate heart rate at a given target, indicating that the controller can play an important role in the design of exercise protocols for individuals.