No abstract

This paper is an extension to a previous work concerning the study of a regulated oxygen mask which distributes oxygen in response to an inhalation demand and shows a vibratory behaviour after a certain constant flow demand value. It was shown that it was a chattering effect due to the appearance of an unstability of the model equilibrium trajectory. After a brief summary of the previous results, a focus is made on the physiological parameters of the regulated mask which limit any modification of the mask.