Pneumatic Model of Intra Aortic Balloon Pump

Sammanfattning

This thesis presents the development and validation of a model designed to simulate dynamic transient gas behavior in an Intra Aortic Balloon Pump with the aim of reducing the reliance on physical experimentation. By utilizing non-linear springs and dampers, the model captures the necessary properties of the system while avoiding the complexity of viscoelastic models. Experimental validation demonstrates strong agreement with observed behaviors, including overshoot magnitude, rise time, and plateau dynamics, though minor discrepancies in undershoot behavior and decay time highlight areas for further refinement captured enables system-wide analysis of key parameters such as the influence of varying internal resistance, tube volume, alternating drive pressure and varying external pressure and their impact on balloon inflation, component displacement, and flow dynamics. While certain physical phenomena, such as thermal effects and viscoelastic stress relaxation, were approximated or excluded, their impact was deemed negligible within the scope of this study. The inclusion of dynamic interactions between system components highlights the model's potential as a design and diagnostic tool. The findings of this thesis provide a robust foundation for understanding and optimizing pneumatic models, offering valuable insights into their dynamic interactions and system-level behavior. Future work will focus on incorporating thermal dynamics, modeling tube compliance together with a dynamic external pressures to enhance the model’s predictive accuracy and applicability to real-world scenarios.