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Fluid-Structure Coupling Model and Experimental Validation of Interaction Between Pneumatic Soft Actuator and Lower
Dong Guan1,2, Rong Liu1, Chengwei Fei1,3
1Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong.
Soft Robotics
|February 26, 2020
Summary
Pneumatic soft actuators (PSAs) enable effective dynamic compression therapy for conditions like lymphedema. This study models their interaction with lower limbs, optimizing pressure delivery for improved treatment outcomes.
Area of Science:
- Biomedical Engineering
- Soft Robotics
- Medical Device Design
Background:
- Pneumatic soft actuators (PSAs) offer lightweight, flexible motion for human-machine interaction.
- PSAs show promise in compression therapy for chronic venous insufficiency and lymphedema.
- Effective design and control of PSAs for dynamic pressure delivery require further investigation.
Purpose of the Study:
- To explore the interactive mechanisms between PSAs and lower limbs.
- To establish fluid-structure coupling models and an intermittent pneumatic compression (IPC) testing system.
- To validate the models through experimental testing.
Main Methods:
- Developed an IPC testing system with a PSA unit, pneumatic controller, and sensors.
- Established fluid-structure coupling models to simulate PSA-limb interactions.
- Conducted experimental validation using the developed system and models.
Main Results:
- The fluid-structure coupling model accurately characterized dynamic responses.
- Key design parameters (PSA thickness, stiffness, airflow) and limb tissue stiffness influence pressure delivery.
- Simulated results showed strong agreement with experimental data.
Conclusions:
- Enhanced understanding of PSA-lower limb interaction mechanisms.
- Provided evidence-based guidance for functional PSA design in compression therapy.
- Contributes to improving dynamic compression therapy efficacy for venous hemodynamics and patient compliance.
