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Nonlinear mechanics of flexible cables in space robotic arms subject to complex physical environment
Liu YW(刘玉旺)1; Chen, Jibiao1,2; Liu JG(刘金国)1; Jing XJ(景兴建)3
Department空间自动化技术研究室
Source PublicationNonlinear Dynamics
ISSN0924-090X
2018
Volume94Issue:1Pages:649-667
Indexed BySCI ; EI
EI Accession number20182405306354
WOS IDWOS:000445375700041
Contribution Rank1
Funding OrganizationNational Natural Science Foundation of China ; State Key Laboratory of Robotics Fund ; Innovation Foundation for National Defense Science and Technology of Chinese Academy of Sciences
KeywordStrong Nonlinear Interference Slow Rotation Of Joints Kirchhoff Nonlinear Mechanics Curved Surface Contact
Abstract

A nonlinear model of a special cable in space robotic arms is developed in space environment. The mechanic effects of control cables in powerful robots can often be neglected. However, in complex space multi-physics environments, involving ultra-low temperature, radiation, and other extreme conditions of outer space, the externally mounted cables (protected by shielding layers) can induce strong nonlinear interference to robot arms; and this can induce further small-range slow rotations or oscillations of the flexible joint of robots at a specific posture, which consequently affect the precision and operation performance of end effectors. Effective mathematical models on nonlinear mechanics of strong cables under multi-physics environments and their effects on weak robots have not been well developed yet. Complex key factors, such as low gravity, nonlinear friction, and unexpected curved surface constraints, have not been extensively investigated either. In this study, considering all these key factors, a Kirchhoff nonlinear mechanical model of cables in complex space environments is developed, and a relatively improved algorithm based on a trust-region strategy is proposed for solving this nonlinear model, based on which the geometry and terminal force of the modeled robot cable can be obtained. The validity and accuracy of the proposed algorithm and theoretical calculation results are verified via experiments. The theoretical findings revealed in this study are significant to future research on the slow rotations and oscillations of weak robot joints in space exploration with robotic arms.

Language英语
WOS SubjectEngineering, Mechanical ; Mechanics
WOS KeywordKIRCHHOFF ELASTIC ROD ; SUSPENDED ROBOT ; DYNAMICS ; SIMULATION ; MODEL ; EQUILIBRIUM ; ROBUST
WOS Research AreaEngineering ; Mechanics
Funding ProjectNational Natural Science Foundation of China[51605474] ; State Key Laboratory of Robotics Fund[2016-Z09] ; Innovation Foundation for National Defense Science and Technology of Chinese Academy of Sciences[CXJJ-17-M109]
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/22097
Collection空间自动化技术研究室
Corresponding AuthorLiu YW(刘玉旺)
Affiliation1.State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, China;
2.Department of Mechanical Engineering and Automation, Northeastern University, Shenyang, China;
3.Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
Recommended Citation
GB/T 7714
Liu YW,Chen, Jibiao,Liu JG,et al. Nonlinear mechanics of flexible cables in space robotic arms subject to complex physical environment[J]. Nonlinear Dynamics,2018,94(1):649-667.
APA Liu YW,Chen, Jibiao,Liu JG,&Jing XJ.(2018).Nonlinear mechanics of flexible cables in space robotic arms subject to complex physical environment.Nonlinear Dynamics,94(1),649-667.
MLA Liu YW,et al."Nonlinear mechanics of flexible cables in space robotic arms subject to complex physical environment".Nonlinear Dynamics 94.1(2018):649-667.
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