Micro-robot Dry Adhesive Micro-wedge Locomotion
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Solution Overview
Problem
Micro-robots face challenges in applying interaction forces several orders of magnitude larger than their body weight without complex external infrastructure, as they struggle with adhesion that is not controllable for easy release and efficient locomotion at small scales.
Innovation Solution
The development of micro-robots using controllable dry adhesives with micro-wedges that can attach and detach quickly, allowing for high step rates and large force generation on various smooth surfaces, enabled by a uni-directional footing or wheel mechanism that synchronizes adhesion with the robot's gait.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If micro-robots use adhesion to apply large interaction forces, then force generation capability is improved, but the ability to quickly engage and disengage adhesion deteriorates
Solution Approach 1:
The adhesive elements are designed to dynamically transition between engaged and disengaged states through controlled deformation. The micro-wedges can be actively deformed to engage or disengage from the surface, enabling rapid switching between adhesion and locomotion phases without requiring complex external infrastructure
Solution Approach 2:
The system changes the physical state of the adhesive elements by deforming the micro-wedges between engaged and disengaged configurations. This parameter change allows the same adhesive structure to provide both strong attachment when needed and rapid release when required, resolving the contradiction between force generation and release speed
2Force
If micro-robots use controllable adhesive for large interaction forces, then force application capability is improved, but device complexity increases
Solution Approach 1:
The micro-wedge adhesive elements are designed to engage and disengage through their own deformation without requiring external actuators or complex control mechanisms. The structure itself provides the means for controlled adhesion, eliminating the need for additional powered infrastructure while maintaining the ability to apply large interaction forces
Solution Approach 2:
The adhesive system is segmented into multiple independent micro-wedge elements that can be distributed across the robot's contact surface. This segmentation allows simple individual elements to collectively provide large interaction forces while keeping each element's control mechanism simple
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
These micro-robots can effectively tow or push loads several hundred times their body weight across smooth surfaces with high efficiency, demonstrating the capability to apply substantial forces while maintaining mobility, as shown by prototypes achieving payloads up to 1800 times their body weight.
Implementation Method 1
attaching a micro-robot, using a first dry adhesive, to a surface, where the dry adhesive includes micro wedges
Implementation Method 2
the lifting element is disposed to detach the first dry adhesive and advance the micro-robot across the surface while the uni-directional footing is attached to the surface
Data Source
AI summary
A method of towing or pushing an object using a micro-robot is provided that includes attaching a micro-robot, using a first dry adhesive, to a surface, where the dry adhesive includes micro wedges, where the micro wedges are attached to the surface when the micro wedges are in a deformed state, applying a load to the attached micro-robot, advancing the micro-robot, using a lifting element, where the lifting element includes a uni-directional footing, where the lifting element is disposed to detach the first dry adhesive and advance the micro-robot across the surface while the uni-directional footing is attached to the surface, where the detached first dry adhesive includes micro wedges in an free-standing state, where the load is advanced across the surface.