A Review of Bionic Technology for Drag Reduction Based on Analysis of Abilities the Earthworm

Gu, Yun Qing; Fan, Tian Xing; Mou, Jie Gang; Jiang, Lan; Deng, Wangqun; Zheng, Shui Hua

doi:10.4028/www.scientific.net/jera.19.103

Cited by 9 publications

(6 citation statements)

References 42 publications

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“…Crawling speed varies both within and among individuals. The crawling speed of earthworms on wet ground is about 5 mm·s –1 ( Gu et al, 2016 ), and the drier the place, the slower the crawling speed. Generally, the ratio of the static diameter/length of earthworm segment is greater than 1, rendering each segment a discus-like shape.…”

Section: Biological Characteristics Of Earthworms and Related Robots ...mentioning

confidence: 99%

“…Currently, there are several reviews that mention earthworm-inspired soft robots in their descriptions in the field of engineering application ( Dario and Mosse, 2003 ; Kheirikhah et al, 2011 ; Kim et al, 2013 ; Gu et al, 2016 ; Wei et al, 2021 ; Dong et al, 2022 ) and robotic gastroscopes ( Marlicz et al, 2020 ; Manfredi, 2021 ). But detailed classification, actuation analysis and discussion of such robots are still lacking.…”

Section: Introductionmentioning

confidence: 99%

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Actuation and design innovations in earthworm-inspired soft robots: A review

Liu

Zuo

2023

Front. Bioeng. Biotechnol.

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Currently, soft robotics technologies are creating the means of robotic abilities and are required for the development of biomimetic robotics. In recent years, earthworm-inspired soft robot has garnered increasing attention as a major branch of bionic robots. The major studies on earthworm-inspired soft robots focuses on the deformation of the earthworm body segment. Consequently, various actuation methods have been proposed to conduct the expansion and contraction of the robot’s segments for locomotion simulation. This review article aims to act as a reference guide for researchers interested in the field of earthworm-inspired soft robot, and to present the current state of research, summarize current design innovations, compare the advantages and disadvantages of different actuation methods with the purpose of inspiring future innovative orientations for researchers. Herein, earthworm-inspired soft robots are classified into single- and multi-segment types, and the characteristics of various actuation methods are introduced and compared according to the number of matching segments. Moreover, various promising application instances of the different actuation methods are detailed along with their main features. Finally, motion performances of the robots are compared by two normalized metrics-speed compared by body length and speed compared by body diameter, and future developments in this research direction are presented.

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Section: Biological Characteristics Of Earthworms and Related Robots ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Actuation and design innovations in earthworm-inspired soft robots: A review

Liu

Zuo

2023

Front. Bioeng. Biotechnol.

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“…Related studies have shown that the dorsal pores of earthworm are opened under the stimulation of alcohol and spray body fluid up to 20 cm in height [19]. ere are regular pits on the surface of earthworm to secrete body fluid, which makes earthworm have a unique self-lubrication mechanism [20].…”

Section: Design and Processingmentioning

confidence: 99%

Influence of Bionic Pit Structure on Friction and Sealing Performance of Reciprocating Plunger

Gao

Su²,

Jiang³

et al. 2020

Advances in Materials Science and Engineering

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A new kind of pit-shaped bionic plunger proposes to reduce the frictional resistance of the reciprocating plunger and improve its sealing performance. According to the dorsal pore of earthworm, the bionic pit structure with different parameters designed and processed. The friction resistance test, observation test, and finite element analysis carried out. The results show that the bionic pit structure can improve the lubrication condition of the plunger surface and reduce the frictional resistance with a maximum drag reduction rate of 14.32%. The pit-shaped bionic structure can increase the storage of lubricating oil, intercept the surface streamline, and decrease the flow rate. The bionic plungers’ mean contact pressure and oil film pressure increased significantly.

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“…Natural organisms have evolved excellent functions and unique geometric structures over billions of years, and among them, animals that are good at digging have evolved superior digging organs. These superior characteristics have been applied to the field of resistance reduction in agricultural machinery, and fruitful research results have been achieved [30,31]. Li et al [32,33] studied the structural characteristics of the dung beetle's touching soil body surface and designed a convex bun type bionic plow, acquiring the efficiency of drag reduction 6.6% to 12.7% through soil bin tests.…”

Section: Introductionmentioning

confidence: 99%

Bionic Nonsmooth Drag Reduction Mathematical Model Construction and Subsoiling Verification

Zhang

Hou

et al. 2021

Applied Bionics and Biomechanics

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In this study, a bionic nonsmooth drag-reducing surface design method was proposed; a mathematical model was developed to obtain the relationship between the altitude of the nonsmooth drag-reducing surface bulges and the spacing of two bulges, as well as the speed of movement, based on which two subsoiler shovel tips were designed and verified on field experiments. The mechanism of nonsmooth surface drag reduction in soil was analyzed, inspired by the efficient digging patterns of antlions. The nonsmooth surface morphology of the antlion was acquired by scanning electron microscopy, and a movement model of the nonsmooth surface in soil was developed, deriving that the altitude of the nonsmooth drag-reducing surface bulge is proportional to the square of the distance between two bulges and inversely proportional to the square of the movement speed. A flat subsoiler shovel tip and a curved tip were designed by applying this model, and the smooth subsoiler shovel tips and the pangolin scale bionic tips were used as controls, respectively. The effect of the model-designed subsoilers on drag reduction was verified by subsoiling experiments in the field. The results showed that the resistance of the model-designed curved subsoiler was the lowest, the resistance of the pangolin scale bionic subsoiler was moderate, and the resistance of the smooth surface subsoiler was the highest; the resistance of the curved subsoiler was less than the flat subsoilers; the resistance reduction rate of the model-designed curved subsoiler was 24.6% to 33.7% at different depths. The nonsmooth drag reduction model established in this study can be applied not only to the design of subsoilers but also to the design of nonsmooth drag reduction surfaces of other soil contacting parts.

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A Review of Bionic Technology for Drag Reduction Based on Analysis of Abilities the Earthworm

Cited by 9 publications

References 42 publications

Actuation and design innovations in earthworm-inspired soft robots: A review

Actuation and design innovations in earthworm-inspired soft robots: A review

Influence of Bionic Pit Structure on Friction and Sealing Performance of Reciprocating Plunger

Bionic Nonsmooth Drag Reduction Mathematical Model Construction and Subsoiling Verification

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