Modeling dynamic blowers in Simscape® for mechanical ventilation

Abstract

This contribution focuses on modeling dynamic blowers by forming a Hammerstein model in which the linear dynamics of the rotational speed and the non-linear static relationship of differential pressure and volume flow is regarded separately. Two isolated identification processes were conducted to parameterize the model which was created upon pre-existing Simscape® elements. For validation purposes the model was placed in a pneumatic circuit equally to a hardware test bench and results are presented for two operating points. In the future this model approach could serve as the basis for model-based control tuning of blowers for mechanical ventilation.