Estimation of Oxygen Consumption for Moderate Exercises by Using a Hammerstein Model

Steven W. Su, Lu Wang, Branko G. Celler, Andrey V. Savkin
2006 IEEE Engineering in Medicine and Biology Society. Conference Proceedings  
This paper aims to establish block-structured model to predict oxygen uptake during moderate treadmill exercises. To model the steady state relationship between oxygen uptake (oxygen consumption) and walking speed, six healthy male subjects walked on a motor driven treadmill with constant speed from 2 to 7 km/h. The averaged oxygen uptake at steady state (VO 2 ) was measured by a mixing chamber based gas analysis and ventilation measurement system (AEI Moxus Metabolic Cart). Based on these
more » ... Based on these reliable date, a nonlinear steady state relationship was successfully established by using Support Vector Regression. In order to capture the dynamics of oxygen uptake, a suitable Pseudo Random Binary Signal (PRBS) input was implemented on treadmill for the exercisers. Breath by breath analysis of all subjects was performed. A useful ARX model is identified to justify the measured oxygen uptake dynamics within the aerobic range. Finally, a Hammerstein is achieved, which is useful for the control system design of oxygen uptake regulation during treadmill exercises.
doi:10.1109/iembs.2006.4398184 fatcat:22c64smhu5gwxlld6a7pkniiaa