dc.contributor.author | Zhang, Y | |
dc.contributor.author | Shen, J | |
dc.contributor.author | Yan, Y | |
dc.contributor.author | Tong, J | |
dc.contributor.author | Zhang, L | |
dc.contributor.author | Liu, Y | |
dc.date.accessioned | 2024-04-18T08:47:40Z | |
dc.date.issued | 2024-04-17 | |
dc.date.updated | 2024-04-17T16:09:55Z | |
dc.description.abstract | Compared to traditional robotic systems, small-scale robots, ranging from several millimetres to micrometres in size, are capable of reaching narrower and vulnerable regions with minimal damage. However, conventional small-scale robots' limited maneuverability and controlability hinder their ability to effectively navigate in the intricate environments, such as the gastrointestinal tract. Self-propelled capsule robots driven by vibrations and impacts emerge as a promising solution, holding the potentials to enhance diagnostic accuracy, enable targeted drug delivery, and alleviate patient discomfort during gastrointestinal endoscopic procedures. This paper builds upon our previous work on self-propelled capsule robots, exploring the potential of nonlinear connecting springs to enhance its propulsion capabilities. Leveraging a mathematical model for self-propelling robots with a von Mises truss spring, which is verified using a finite element model, we investigate the effects of negative stiffness and snap-back within the nonlinear structural spring on the robots' propelling speed. Our analysis reveals that the negative stiffness of the von Mises truss can significantly reduce the sensitivity of the propelling speed to excitation frequency. As a result, the capsule robot exhibits a remarkably wider operational band where it maintains a high average propelling speed, surpassing its linear counterpart. This work sheds light on the potential for developing customised nonlinear structural systems for diverse scenarios in small-scale robot applications, opening up new possibilities for enhanced functionality and maneuverability in various biomedical applications. | en_GB |
dc.description.sponsorship | National Natural Science Foundation of China | en_GB |
dc.description.sponsorship | Sichuan Science and Technology Program | en_GB |
dc.description.sponsorship | Sichuan Science and Technology Program | en_GB |
dc.description.sponsorship | National Natural Science Foundation of China | en_GB |
dc.description.sponsorship | Zhejiang Provincial Natural Science Foundation in China. | en_GB |
dc.description.sponsorship | University of Exeter | en_GB |
dc.identifier.citation | Published online 17 April 2024 | en_GB |
dc.identifier.doi | https://doi.org/10.1115/1.4065339 | |
dc.identifier.grantnumber | 12072068 | en_GB |
dc.identifier.grantnumber | 2022JDRC0018 | en_GB |
dc.identifier.grantnumber | 2021ZDZX0004 | en_GB |
dc.identifier.grantnumber | 52108180 | en_GB |
dc.identifier.grantnumber | LR24E080002 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/135778 | |
dc.identifier | ORCID: 0000-0003-3867-5137 (Liu, Yang) | |
dc.identifier | ScopusID: 55199382800 (Liu, Yang) | |
dc.identifier | ResearcherID: ABD-4124-2021 | K-1976-2015 (Liu, Yang) | |
dc.language.iso | en | en_GB |
dc.publisher | American Society of Mechanical Engineers | en_GB |
dc.rights | © 2024 by ASME | en_GB |
dc.subject | dynamics | en_GB |
dc.subject | impact | en_GB |
dc.subject | structures | en_GB |
dc.subject | vibration | en_GB |
dc.title | Enhancing the mobility of small-scale robots via nonlinear structural springs exhibiting negative stiffness | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2024-04-18T08:47:40Z | |
dc.identifier.issn | 0021-8936 | |
dc.description | This is the author accepted manuscript. The final version is available from the American Society of Mechanical Engineers via the DOI in this record | en_GB |
dc.description | Data accessibility:
The datasets generated and analysed during the current study are not publicly available due
to the potential use for further publications, but are available from the corresponding author on
reasonable request | en_GB |
dc.identifier.eissn | 1528-9036 | |
dc.identifier.journal | Journal of Applied Mechanics | en_GB |
dc.relation.ispartof | Journal of Applied Mechanics | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2024-04-14 | |
dcterms.dateSubmitted | 2024-02-06 | |
rioxxterms.version | AM | en_GB |
rioxxterms.licenseref.startdate | 2024-04-14 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2024-04-17T16:10:06Z | |
refterms.versionFCD | AM | |
refterms.dateFOA | 2024-04-18T08:48:01Z | |
refterms.panel | B | en_GB |
refterms.dateFirstOnline | 2024-04-17 | |