Bionic Flexible Actuator with Real-Time Feedback via V-Groove Sensor
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Solution Overview
Problem
Current actuators lack a feedback system, preventing them from achieving intelligent controllable deformation and real-time response to stimuli.
Innovation Solution
A bionic flexible actuator with a real-time feedback function is developed, comprising a stimuli-response layer and a bionic flexible strain-sensor film layer with a V-shaped groove array structure, where the strain-sensor film is embedded with multi-walled carbon nanotubes and polyvinylidene fluoride, and connected through an adhesive layer, enabling deformation sensing and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional mechanical, motor, or hydraulic actuation methods are used, then actuator motion control is achieved, but real-time feedback function is lacking
Solution Approach 1:
The patent combines the actuator and sensor into a single integrated bionic flexible actuator structure. The stimuli-response layer serves both actuation and sensing functions, eliminating the need for separate feedback systems while providing real-time deformation monitoring through the embedded strain sensor film.
Solution Approach 2:
The stimuli-response layer performs multiple functions simultaneously: it acts as the actuation element that responds to stimuli and as the sensing element that provides feedback on deformation. This multi-functionality resolves the contradiction by providing feedback capability without adding separate dedicated sensing components.
2Extent of automation
If no feedback system is present, then device complexity is low, but intelligent controllable deformation is unable to be achieved
Solution Approach 1:
The bionic flexible actuator is self-sensing and self-monitoring through the embedded strain sensor film in the stimuli-response layer. The structure automatically provides feedback on its own deformation state without requiring external sensing systems, enabling intelligent control while maintaining simplicity.
Solution Approach 2:
The patent implements a feedback mechanism where the strain sensor film continuously monitors deformation of the stimuli-response layer and provides real-time feedback signals. This enables closed-loop intelligent control of the actuator's motion, resolving the contradiction between automation and complexity.
3Reliability
If multi-walled carbon nanotubes and polyvinylidene fluoride are mixed in specific ratios, then stimuli-response performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies optimal parameter ranges for the mixed solution (multi-walled carbon nanotubes to polyvinylidene fluoride mass ratio of 3-7:100, thickness of 200-400 μm) that balance performance and manufacturability. These parameter definitions provide clear manufacturing guidelines that resolve the contradiction between achieving high performance and maintaining manufacturing feasibility.
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
The actuator can sense and control deformation through feedback, allowing for intelligent and controllable motion, enhancing its responsiveness and adaptability.
Implementation Method 1
The difference of a thermal expansion coefficient between the multi-walled carbon nanotubes and the polyvinylidene fluoride has 40 times, so when a temperature rises, an expansion degree of the polyvinylidene fluoride film is higher than that of the multi-walled carbon nanotubes film
Implementation Method 2
embedding a first electrode 13 to obtain the stimuli-response layer 10... the bionic flexible strain-sensor film layer 30 can sense a deformation degree of the stimuli-response layer 10
Data Source
AI summary
A bionic flexible actuator with a real-time feedback function and a preparation method thereof. The method includes: preparing stimuli-response layer and bionic flexible strain-sensor film layer, arranging bionic V-shaped groove array structure on bionic flexible strain-sensor film layer, and sticking bionic flexible strain-sensor film layer onto stimuli-response layer through adhesive layer; stimuli-response layer is prepared by adopting following steps: mixing multi-walled carbon nanotubes and polyvinylidene fluoride after being dissolved in a solvent respectively and obtaining a mixed solution; performing a film formation process to mixed solution and embedding a first electrode to obtain stimuli-response layer. Due to sticking bionic flexible strain-sensor film layer onto stimuli-response layer, bionic flexible strain-sensor film layer can sense a deformation degree of stimuli-response layer through bionic V-shaped groove array structure, deformation of stimuli-response layer maybe be controlled by feedback of deformation information thereof.