Morphing Origami Block for Lightweight Reconfigurable System

Kim, Sa-Reum; Lee, Dae-Young; Cho, Kyu-Jin; Koh, Je‐Sung; Cho, Kyu-Jin

doi:10.1109/tro.2020.3031248

Cited by 20 publications

(7 citation statements)

References 41 publications

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“…An origami robot with hard sheets, such as paper and plastic sheets, has a highly versatile shape-changing capability that does not require a complex assembly process. Creating a folding pattern is a challenge in designing a specific 3D shape, such as multimodal deformations [ 49 , 50 ], and creating flexible origami robots with rigid paper [ 83 , 84 , 85 , 86 ]. Wu et al, developed a stretchable origami robotic arm with multimodal deformations ( Figure 1 E) [ 49 ].…”

Section: Materials Selectionmentioning

confidence: 99%

“…Deployment and stacking strategies have been extensively used to fabricate complex origami structures composed of several materials with diverse crease patterns displayed [ 103 , 104 ]. In short, the deployment and stacking method is primarily utilized to create crease patterns and integrate various material-based patterns [ 50 , 105 , 106 , 107 ] or multi-step patterning [ 108 ] into a single mechanical system. Using this multi-selective fabrication method, Overvelde et al, fabricated a single extruded cube unit cell ( Figure 2 D) [ 106 ].…”

Section: Fabricationmentioning

confidence: 99%

“…It is difficult to realize an active programmable origami device that exhibits large, fast, reversible, and stable movements in practical applications. To take full advantage of the deformability of origami structures, researchers have proposed diverse electronic-based SMA-based origami actuators [ 45 , 46 , 50 , 134 , 135 , 136 , 137 , 138 ]. Recently, Kim et al, presented a 3D shape-shifting actuator consisting of a reversibly morphing origami block with a torsional shape-memory alloy wire (TSW) actuated by electronics ( Figure 4 E) [ 50 ].…”

Section: Actuation Triggersmentioning

confidence: 99%

See 2 more Smart Citations

4D Multiscale Origami Soft Robots: A Review

Son

Park²,

Na³

et al. 2022

Polymers

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Time-dependent shape-transferable soft robots are important for various intelligent applications in flexible electronics and bionics. Four-dimensional (4D) shape changes can offer versatile functional advantages during operations to soft robots that respond to external environmental stimuli, including heat, pH, light, electric, or pneumatic triggers. This review investigates the current advances in multiscale soft robots that can display 4D shape transformations. This review first focuses on material selection to demonstrate 4D origami-driven shape transformations. Second, this review investigates versatile fabrication strategies to form the 4D mechanical structures of soft robots. Third, this review surveys the folding, rolling, bending, and wrinkling mechanisms of soft robots during operation. Fourth, this review highlights the diverse applications of 4D origami-driven soft robots in actuators, sensors, and bionics. Finally, perspectives on future directions and challenges in the development of intelligent soft robots in real operational environments are discussed.

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Section: Materials Selectionmentioning

confidence: 99%

Section: Fabricationmentioning

confidence: 99%

Section: Actuation Triggersmentioning

confidence: 99%

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4D Multiscale Origami Soft Robots: A Review

Son

Park²,

Na³

et al. 2022

Polymers

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show abstract

“…Due to their lightweight characteristics and stiff-less structures, origami design has recently obtained a surge of interest, while reconfigurable capabilities allow them to achieve more flexibility [ 17 , 18 , 19 ]. Those advantages benefit the development of wearable devices [ 20 , 21 , 22 ] as they can be adaptable, compact, and lightweight [ 23 ]. In the scene of interaction with the skin, we can classify origami structures into circular type and linear type, according to the pressure direction.…”

Section: Introductionmentioning

confidence: 99%

Origami-Inspired Structure with Pneumatic-Induced Variable Stiffness for Multi-DOF Force-Sensing

Yue

Song

et al. 2022

Sensors

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With the emerging need for human–machine interactions, multi-modal sensory interaction is gradually pursued rather than satisfying common perception forms (visual or auditory), so developing flexible, adaptive, and stiffness-variable force-sensing devices is the key to further promoting human–machine fusion. However, current sensor sensitivity is fixed and nonadjustable after fabrication, limiting further development. To solve this problem, we propose an origami-inspired structure to achieve multiple degrees of freedom (DoFs) motions with variable stiffness for force-sensing, which combines the ductility and flexibility of origami structures. In combination with the pneumatic actuation, the structure can achieve and adapt the compression, pitch, roll, diagonal, and array motions (five motion modes), which significantly increase the force adaptability and sensing diversity. To achieve closed-loop control and avoid excessive gas injection, the ultra-flexible microfiber sensor is designed and seamlessly embedded with an approximately linear sensitivity of ∼0.35 Ω/kPa at a relative pressure of 0–100 kPa, and an exponential sensitivity at a relative pressure of 100–350 kPa, which can render this device capable of working under various conditions. The final calibration experiment demonstrates that the pre-pressure value can affect the sensor’s sensitivity. With the increasing pre-pressure of 65–95 kPa, the average sensitivity curve shifts rightwards around 9 N intervals, which highly increases the force-sensing capability towards the range of 0–2 N. When the pre-pressure is at the relatively extreme air pressure of 100 kPa, the force sensitivity value is around 11.6 Ω/N. Therefore, our proposed design (which has a low fabrication cost, high integration level, and a suitable sensing range) shows great potential for applications in flexible force-sensing development.

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“…9 By means of actuation of origami robots using SMA, variety of actuators were introduced in last decades: unidirectional rotational motion 10,11 and bi-directional rotational motion (BRM). [12][13][14] Previous works 15 provided a review of SMA-based actuation of state of the art in SMA-based actuators for BRM. Additionally, the torsional-SMA-based actuators (T-SMAs) showed an exciting potential for the BRM actuation of meso-scale origami robotics.…”

Section: Introductionmentioning

confidence: 99%

Design of a bidirectional rotational motion actuator by SMA with geometrico-static requirements

Ouisse

Rabenorosoa

2022

Behavior and Mechanics of Multifunctional Materials XVI

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Shape memory alloys (SMAs) are a group of metallic alloys capable of sustaining large inelastic strains that can be recovered when subjected to a specific process between two distinct phases. Advantages of SMAsreasonable strain, high energy density, mechanical simplicity, and long work-life render them ideal for actuator applications. Especially, Self-folding origami requires high angular motion ranges and low-profile actuators within limited space. Current applications demonstrate the capacity of millimeter-sized torsional SMAs (T-SMAs) for bi-directional rotational motion, but no comprehensive design method for such actuators can be found in the existing literature. To broaden applications of actuator designs, we introduce an inverse design model according to a geometrico-static demand. We couple the geometrical and mechanical properties of torsional SMAs considering assembly and working conditions to construct the design model. We also illustrate a comprehensive mechanical performance characterization for millimeter-sized torsional SMAs and BRM actuators.

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Morphing Origami Block for Lightweight Reconfigurable System

Cited by 20 publications

References 41 publications

4D Multiscale Origami Soft Robots: A Review

4D Multiscale Origami Soft Robots: A Review

Origami-Inspired Structure with Pneumatic-Induced Variable Stiffness for Multi-DOF Force-Sensing

Design of a bidirectional rotational motion actuator by SMA with geometrico-static requirements

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