Active Control of Stiffness of Tensegrity Plate-like Structures Built with Simplex Modules

Area of Science:

• Structural Engineering
• Mechanics of Materials
• Robotics and Deployable Structures

Background:

• Tensegrity structures offer unique mechanical properties.
• Controlling the static behavior of tensegrity plate-like structures is crucial for deployable applications.
• Understanding the role of support conditions is key to harnessing tensegrity's potential.

Purpose of the Study:

• To investigate the possibility of controlling the static behavior of tensegrity plate-like structures.
• To analyze the impact of support conditions on self-stress states and infinitesimal mechanisms.
• To demonstrate active control of stiffness in these structures.

Main Methods:

• Analysis of Simplex module-based tensegrity plates.
• Examination and classification of self-stress states and infinitesimal mechanisms.
• Utilizing a geometrically non-linear model in a custom Mathematica program.
• Investigating the influence of self-stress levels on structural behavior.

Main Results:

• Confirmed feasibility of active stiffness control for tensegrity plates with infinitesimal mechanisms.
• Structures lacking mechanisms are insensitive to prestress levels.
• Support conditions can be manipulated to control the occurrence of mechanisms.
• Self-stress states and mechanisms significantly impact active control.

Conclusions:

• Tensegrity plate-like structures offer promising potential for active stiffness control.
• The presence of infinitesimal mechanisms is essential for active control.
• Adjusting support conditions provides a method to manage structural characteristics.
• Tensegrity presents a viable alternative for applications where conventional structures fall short.