Abstract
A typical mechatronics system consists of a mechanical process, electromechanical actuators, electronic sensors and a controller unit with the corresponding software. In this paper a microcontroller-based digital feedback control of a positioning device for a ventilation machine is presented. This kind of machine should allow either a volume- or a pressure-based controlled ventilation. The interdependence between the two important physiological variables, respiration volume and lung pressure, is highlighted and the requirements on the control system are discussed. Based on a mathematical model for the respiration device and the characteristics of the patient's lung a feedback control concept for both respiration modes has been developed and is presented in this paper. By means of simulations the control concept has been tested. To sum up some simulation and experimental results are shown.
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