用剪切纹路的可充气纺织材料实现可控爬行,自组装出鳞片状表面。
Inflatable Kirigami Crawlers
- 在热封织物中设计剪切图案,通过气动循环驱动实现定向变形。
- 收缩力比普通气囊强两倍,局部边缘重叠形成鳞片结构。
- 具备方向性摩擦特性,适合在不同粗糙度表面爬行,可拓展为软体机器人。
基里加米(Kirigami)通过切割几何结构为可控形变提供了独特机会。本文提出一种由热封织物引入剪切图案制成的可充气基里加米爬行器,在周期性气动驱动下实现运动。传统气囊充气时呈现对称膨胀与收缩,而充气后的基里加米执行器因累积压缩力打破对称性,收缩性能比简单气囊提升两倍,并触发密封边缘的局部旋转,自我组装成具有新兴鳞片特征的架构化表面。结果表明,该执行器表现出均匀可控的收缩和非对称的局部面外变形。这一过程利用几何与材料非线性,赋予可充气纺织基基里加米执行器可预测的运动功能。我们系统表征了这些执行器的程序化变形及其对摩擦的影响。发现充气状态下基里加米执行器具有方向性各向异性摩擦特性:运动反方向的摩擦系数更高,使其可在不同粗糙度表面移动。此外,通过引入多通道与多段结构,进一步提升了功能性,实现了具备多样化运动能力的软体机器人原型。
原文摘要 · Abstract (English)
Kirigami offers unique opportunities for guided morphing by leveraging the geometry of the cuts. This work presents inflatable kirigami crawlers created by introducing cut patterns into heat-sealable textiles to achieve locomotion upon cyclic pneumatic actuation. Inflating traditional air pouches results in symmetric bulging and contraction. In inflated kirigami actuators, the accumulated compressive forces uniformly break the symmetry, enhance contraction compared to simple air pouches by two folds, and trigger local rotation of the sealed edges that overlap and self-assemble into an architected surface with emerging scale-like features. As a result, the inflatable kirigami actuators exhibit a uniform, controlled contraction with asymmetric localized out-of-plane deformations. This process allows us to harness the geometric and material nonlinearities to imbue inflatable textile-based kirigami actuators with predictable locomotive functionalities. We thoroughly characterized the programmed deformations of these actuators and their impact on friction. We found that the kirigami actuators exhibit directional anisotropic friction properties when inflated, having higher friction coefficients against the direction of the movement, enabling them to move across surfaces with varying roughness. We further enhanced the functionality of inflatable kirigami actuators by introducing multiple channels and segments to create functional soft robotic prototypes with versatile locomotion capabilities.
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