The Extension Arm Design Method Based on a Two-Bar Tension Stretchable Mechanism

Area of Science:

• Structural Engineering
• Aerospace Engineering
• Materials Science

Background:

• Current deployable masts lack stability during movement and autonomous recovery capabilities.
• Advancements in spatial deployable mast technology are crucial for aerospace applications.
• Tensegrity structures offer unique properties for deployable systems.

Purpose of the Study:

• To propose a new spatially deployable mast structure with zero Poisson's ratio, self-stability, and self-adaptability.
• To enhance the stability and autonomous recovery of deployable mechanisms for aerospace use.
• To integrate tensegrity principles into deployable mast design for improved functionality.

Main Methods:

• Design of an innovative two-bar, four-cable tensegrity structure.
• Analysis of structural stability using the force density method and stiffness matrix.
• Verification of load-bearing characteristics via ABAQUS simulations and 3D printed prototype testing.

Main Results:

• The proposed tensegrity deployable mast exhibits zero Poisson's ratio, self-stability, and self-adaptability.
• ABAQUS analysis confirmed exceptional stability and derived optimal parameters, including minimum compressive stiffness.
• Experimental validation demonstrated the structure's self-recovering and self-stabilizing capabilities.

Conclusions:

• The novel tensegrity deployable mast significantly improves upon existing designs by offering autonomous recovery and enhanced stability.
• This research expands the multifunctionality of deployable masts and broadens the application of tensegrity structures in aerospace.
• The developed prototype validates the theoretical and simulation findings, paving the way for practical implementation.