Mechanism properties of a bird-neck bionic rigid-flexible structure

Area of Science:

• Robotics and Mechanical Engineering
• Biomimetics and Bio-inspired Design
• Biomechanics and Structural Analysis

Background:

• Bird necks exhibit complex, multi-directional flexibility crucial for survival.
• Existing robotic systems lack the adaptable, rigid-flexible structures seen in biological systems.
• Understanding the mechanics of avian necks can inspire advanced engineering solutions.

Purpose of the Study:

• To propose and analyze a bionic bird-neck rigid-flexible structure inspired by woodpecker anatomy.
• To investigate the mechanical properties, particularly flexible deformations and dynamic stability, of this bionic structure.
• To establish a theoretical framework for designing bio-inspired structures with high spatial accessibility and adaptability.

Main Methods:

• Biometric analysis of woodpecker neck anatomy to inform structural design.
• Development of a mechanical model using connectivity matrices for multi-level deformations.
• Application of the principle of minimum potential energy for an integral form-finding method.
• Validation through Finite Element Analysis (FEA) and comparison with theoretical models.

Main Results:

• A bionic rigid-flexible structure capable of six-directional deformation was successfully designed.
• The structure's "S" shape accurately replicates avian neck morphology.
• Analysis revealed adjustable dynamic stiffness, explaining the bird neck's bending stability.
• The model accurately predicted the structure's form and mechanical behavior.

Conclusions:

• The proposed bionic structure offers high spatial accessibility and mimics biological neck mechanics.
• The study provides a mechanical explanation for the dynamic stability observed in avian necks.
• Potential applications include aeronautical deployable systems, robotic manipulators, and dynamic stability enhancement.