Modelling and experimental validation of Textile Pockets based active inflatable device

Area of Science:

• Materials Science
• Mechanical Engineering
• Textile Engineering

Background:

• Classical airbags often use stretchable polymers.
• Inflatable Textile Pockets (ITPs) offer superior mechanical properties and automated production via Jacquard knitting.
• ITPs present a viable alternative to conventional airbag materials.

Purpose of the Study:

• To develop a generalized and flexible mathematical model for an active inflatable device.
• To accurately simulate the pressure dynamics within Inflatable Textile Pockets (ITPs).
• To enable easy adaptation of the model for ITPs of diverse shapes.

Main Methods:

• A combined sub-model approach was used, integrating components like a compressor, Electro-pneumatic Pressure Converter (EPC), and ITP.
• Mathematical modeling focused on pressure dynamics, considering airflow rate, ITP volume variation, and pneumatic line length.
• Model parameters were determined using system identification techniques.

Main Results:

• The developed mathematical model effectively captures the behavior of the active inflatable device.
• The model's flexibility allows for the incorporation of various ITP geometries.
• Experimental validation using a servo-hydraulic fatigue testing machine confirmed the model's effectiveness.

Conclusions:

• The proposed mathematical model provides a robust framework for analyzing active inflatable devices utilizing ITPs.
• The Jacquard knitting technique enables versatile and mold-free production of ITPs.
• This research advances the development of advanced inflatable systems with improved material alternatives.