Adaptive Structural Core for Morphing Panels
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Solution Overview
Problem
Morphing panel structures in aerospace applications face challenges in resisting out-of-plane bending while maintaining flexibility for in-plane deformation, as existing solutions do not effectively balance structural support with aerodynamic requirements.
Innovation Solution
An adaptive structural core comprising a repeating pattern of core members with actuator attachment points and McKibben or non-hydraulic actuators that are fluidically continuous, allowing for controlled deformation and stiffness adjustment through cooperative and antagonistic actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional rigid structural cores are used, then out-of-plane bending resistance is improved, but in-plane deformation capability deteriorates
Solution Approach 1:
The structural core is divided into discrete unit cells arranged in a repeating pattern, with individual actuators controlling each cell's geometry. This segmentation allows localized deformation in-plane while maintaining overall structural rigidity out-of-plane through the collective behavior of multiple cells.
Solution Approach 2:
The core structure transitions from a static rigid configuration to a dynamic reconfigurable system using McKibben actuators that can actively change the geometry of unit cells. This enables the structure to adapt its stiffness and shape in-plane while preserving out-of-plane strength through controlled morphing.
2Adaptability or versatility
If flexible materials are used to enable in-plane deformation, then adaptability is improved, but out-of-plane strength deteriorates
Solution Approach 1:
The structure employs a composite approach combining rigid core members forming the unit cell framework with flexible actuation elements. This composite architecture provides out-of-plane stiffness through the rigid framework while enabling in-plane deformation through the flexible actuator-driven geometry changes.
Solution Approach 2:
The unit cell structure serves multiple functions simultaneously: it provides structural support for out-of-plane loads through its rigid framework, while also enabling in-plane morphing through actuator-controlled geometry changes. This multi-functionality resolves the contradiction between strength and adaptability.
3Manufacturing precision
If multiple discrete actuators are used for each core cell, then deformation control precision is improved, but device complexity increases
Solution Approach 1:
Multiple actuator control functions are merged into a coordinated system where actuators are arranged in antagonistic pairs within each unit cell. This merging approach maintains precise deformation control through differential actuation while reducing overall system complexity by using a repeating pattern of standardized cell-actuator assemblies.
Solution Approach 2:
The system controls deformation by changing the pressure parameters of pneumatic McKibben actuators rather than using complex mechanical linkages. This parameter-based control (pressure modulation) simplifies the actuation mechanism while maintaining precise control over unit cell geometry and overall structure morphing.
4Use of energy by moving object
If continuous tubing is used for fluidic actuators, then energy efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The continuous fluidic tubing is nested through the repeating unit cell structure, with tubing routed through actuator attachment points and core nodes in a systematic pattern. This nesting approach enables efficient fluid distribution across multiple cells while maintaining manufacturability through modular assembly of standardized components.
Data Source
Figure 1~6
Figure 6A~6F
Figure 6G~6I
AI summary
An adaptive structural core includes a plurality of core members arranged in a repeating pattern, a plurality of actuator attachment points provided on the plurality of core members and at least one actuator engaging the plurality of actuator attachment points.