An Origami Continuum Robot Capable of Precise Motion Through Torsionally Stiff Body and Smooth Inverse Kinematics

Area of Science:

• Robotics
• Mechanical Engineering
• Materials Science

Background:

• Traditional rigid robots have limitations in navigating confined or complex spaces.
• Existing continuum robots often exhibit undesirable twisting under load, reducing precision.
• Hyper-redundant continuum robot arms offer potential for applications beyond the scope of rigid robots.

Purpose of the Study:

• To develop a continuum robot with inherent torsional stiffness to overcome limitations of existing designs.
• To enhance the dexterity and precision of continuum manipulators for complex tasks.
• To enable continuum robots to navigate tortuous paths and perform intricate manipulations.

Main Methods:

• An origami-inspired modular design was developed to provide passive torsional stiffness.
• The mechanical properties of the origami continuum module were characterized (torsional strength, weight, length change).
• An optimization-based inverse kinematics method and grow-to-shape algorithms were devised for motion planning.

Main Results:

• The origami continuum module demonstrated approximately 73 times greater torsional strength than silicone counterparts.
• The module was 50% lighter and capable of 125% length change.
• The developed methods enabled smooth motion, minimized vibrations, and facilitated path planning for tortuous environments.

Conclusions:

• The origami-inspired continuum robot offers significant improvements in torsional stiffness, dexterity, and maneuverability.
• This novel design is suitable for applications requiring safe manipulation and inspection in challenging environments.
• The robot shows potential for real-world deployment in areas like structure inspection and complex navigation.