Self‐Sustained Snapping Drives Autonomous Dancing and Motion in Free‐Standing Wavy Rings (Adv. Mater. 7/2023)

Zhao, Yao; Hong, Yaoye; Qi, Fangjie; Chi, Yinding; Su, Hao; Yin, Jie

doi:10.1002/adma.202370047

Cited by 8 publications

(10 citation statements)

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“…Soft robots are composed of soft materials with low stiffness and are driven by soft actuators. Several different types of soft actuators have been developed such as light actuators, [ 1–7 ] electrical actuators, [ 8–26 ] thermal actuators, [ 27–36 ] magnetic actuators, [ 37–47 ] and fluidic actuators. [ 48–53 ] Soft actuators and body structures enable more degrees of freedom.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, vibration‐based robots are also easier to miniaturize to explore narrow spaces. Vibration‐based micro‐robots can be realized by lead zirconate titanate (PZT) actuators [ 59–60 ] and dielectric elastomer actuators, [ 25–61 ] which often exhibit faster motion. However, these two actuators usually require complex excitation sources to generate specific signals with high voltage or high frequency.…”

Section: Introductionmentioning

confidence: 99%

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Bio‐Mimic, Fast‐Moving, and Flippable Soft Piezoelectric Robots

Chen

Yang

et al. 2023

Advanced Science

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Cheetahs achieve high‐speed movement and unique athletic gaits through the contraction and expansion of their limbs during the gallop. However, few soft robots can mimic their gaits and achieve the same speed of movement. Inspired by the motion gait of cheetahs, here the resonance of double spiral structure for amplified motion performance and environmental adaptability in a soft‐bodied hopping micro‐robot is exploited. The 0.058 g, 10 mm long tethered soft robot is capable of achieving a maximum motion speed of 42.8 body lengths per second (BL/s) and a maximum average turning speed of 482° s−1. In addition, this robot can maintain high speed movement even after flipping. The soft robot's ability to move over complex terrain, climb hills, and carry heavy loads as well as temperature sensors is demonstrated. This research opens a new structural design for soft robots: a double spiral configuration that efficiently translates the deformation of soft actuators into swift motion of the robot with high environmental adaptability.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bio‐Mimic, Fast‐Moving, and Flippable Soft Piezoelectric Robots

Chen

Yang

et al. 2023

Advanced Science

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“…[ 16 ] The design of soft robots utilizes either materials intelligence of soft smart materials or incorporates the mechanical intelligence of structural design. [ 17 ] Soft robots have been developed capable of forward navigations and driven by stimuli‐responsive materials such as shape memory polymers (SMPs), [ 18–22 ] magnetic actuators, [ 23–26 ] light‐powered actuators, [ 27–32 ] pneumatic actuators, [ 33,34 ] chemical actuators, [ 35–37 ] liquid crystal elastomers (LCEs), [ 38–43 ] and electroactive polymer (EAP) actuators. [ 44–48 ] These smart materials can further expand and enhance robotic performance through structural design, including bilayer structures, [ 49–51 ] tensegrity structures, [ 52–54 ] origami/kirigami structures, [ 55,56 ] and bistable structures.…”

Section: Introductionmentioning

confidence: 99%

Spiral‐Shape Fast‐Moving Soft Robots

Chen

et al. 2023

Adv Funct Materials

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Soft robots typically exhibit limited agility due to inherent properties of soft materials. The structural design of soft robots is one of the key elements to improve their mobility. Inspired by the Archimedean spiral geometry in nature, here, a fast‐moving spiral‐shaped soft robot made of a piezoelectric composite with an amorphous piezoelectric vinylidene fluoride film and a layer of copper tape is presented. The soft robot demonstrates a forward locomotion speed of 76 body length per second under the first‐order resonance frequency and a backward locomotion speed of 11.26 body length per second at the third‐order resonance frequency. Moreover, the multitasking capabilities of the soft robot in slope climbing, step jumping, load carrying, and steering are demonstrated. The soft robot can escape from a relatively confined space without external control and human intervention. An untethered robot with a battery and a flexible circuit (a payload of 1.665 g and a total weight of 1.815 g) can move at an absolute speed of 20 mm s−1 (1 body length per second). This study opens a new generic design paradigm for next‐generation fast‐moving soft robots that are applicable for multifunctionality at small scales.

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“…Potential applications in material adaptation, [ 41 ] autonomous locomotion, [ 36 ] and energy conversion [ 29,42 ] are preliminarily proposed for self‐oscillators. Nevertheless, their further implementation is impeded by three major challenges.…”

Section: Introductionmentioning

confidence: 99%

“…[26,27] During the past decade, various reports on self-shadowing-induced oscillators in different polymer systems have been published, [28][29][30][31][32][33] bringing about novel opportunities for soft microrobotics. Hitherto, self-sustained walkers, [34] rollers, [35] jumpers, [36] swimmers, [14,37] and water pumps [38] have been demonstrated. The key technical aspect to attain those autonomous robotic systems relies on an unstable mechanical equilibrium, by which the input light energy induces a continuous mechanical vibration around the equilibrium point.…”

Section: Introductionmentioning

confidence: 99%

A Scalable, Incoherent‐Light‐Powered, Omnidirectional Self‐Oscillator

Nemati

Deng

et al. 2023

Advanced Intelligent Systems

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Light‐fueled self‐oscillators based on stimuli‐responsive soft materials have been explored toward the realization of a myriad of nonequilibrium robotic functions, such as adaptation, autonomous locomotion, and energy conversion. However, the high energy density and unidirectionality of the light field, together with the unscalable design of the existing demonstrations, hinder their further implementation. Herein, a light‐responsive lampshade‐like smart material assembly as a new self‐oscillator model that is unfettered by the abovementioned challenges, is introduced. Liquid crystal elastomer with low phase transition temperature is used as the photomechanical component to provide twisting movement under low‐intensity incoherent light field. A spiral lampshade frame ensures an equal amount of light being shadowed as negative feedback to sustain the oscillation upon constant light field from omnidirectional excitation (0°–360° azimuth and 20°–90° zenith). Different‐sized oscillators with 6, 15, and 50 mm in diameter are fabricated to prove the possibility of scaling up and down the concept. The results provide a viewpoint on the fast‐growing topic of self‐oscillation in soft matter and new implications for self‐sustained soft robots.

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Self‐Sustained Snapping Drives Autonomous Dancing and Motion in Free‐Standing Wavy Rings (Adv. Mater. 7/2023)

Cited by 8 publications

References 0 publications

Bio‐Mimic, Fast‐Moving, and Flippable Soft Piezoelectric Robots

Bio‐Mimic, Fast‐Moving, and Flippable Soft Piezoelectric Robots

Spiral‐Shape Fast‐Moving Soft Robots

A Scalable, Incoherent‐Light‐Powered, Omnidirectional Self‐Oscillator

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