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Author:

Zhao, Qiangqiang (Zhao, Qiangqiang.) | Guo, Junkang (Guo, Junkang.) | Hong, Jun (Hong, Jun.) (Scholars:洪军)

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Abstract:

Kinematic reliability is an essential index assessing the work performance of robotic manipulators. In general, the kinematic reliability of robotic manipulators is defined as the probability of the pose or position error falling into a specified tolerant region. Therefore, this work proposes an efficient method to conduct kinematic reliability analysis for robotic manipulators under rectangular and spherical allowable safe boundaries in terms of dimension and input uncertainties. First, based on the Baker-Campbell-Hausdorff formula and Lie group theory, the mean and covariance matrix of the distribution of the pose error are analytically determined. Then, the expectation propagation of the multivariate Gaussian and saddlepoint approximation method are employed to calculate the probabilities of kinematic reliability under the rectangular and spherical safe boundaries, respectively. The proposed method takes into account the boundness of the random error variable and is available for arbitrarily distributed errors. Finally, a spatial six degrees-of-freedom industrial robot is used as an example to demonstrate the effectiveness of the proposed method by comparison with other methods. The comparison results indicate that the proposed method has higher accuracy and efficiency.

Keyword:

covariance matrix expectation propagation mechanism design robot design robotic manipulator saddlepoint approximation system kinematic reliability theoretical kinematics

Author Community:

  • [ 1 ] [Zhao, Qiangqiang]Xi An Jiao Tong Univ, Sch Mech Engn, Educ Minist Modern Design & Rotor Bearing Syst, Key Lab, Xianning West Rd, Xian 710049, Peoples R China
  • [ 2 ] [Guo, Junkang]Xi An Jiao Tong Univ, Sch Mech Engn, Educ Minist Modern Design & Rotor Bearing Syst, Key Lab, Xianning West Rd, Xian 710049, Peoples R China
  • [ 3 ] [Hong, Jun]Xi An Jiao Tong Univ, Sch Mech Engn, Educ Minist Modern Design & Rotor Bearing Syst, Key Lab, Xianning West Rd, Xian 710049, Peoples R China

Reprint Author's Address:

  • [Guo, Junkang]Key Laboratory of Education, Ministry for Modern Design and Rotor-Bearing System, School of Mechanical Engineering, Xi'an Jiaotong University, Xianning West Road, Xi'an; 710049, China;;

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Source :

JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME

ISSN: 1942-4302

Year: 2021

Issue: 1

Volume: 13

2 . 0 8 5

JCR@2020

ESI Discipline: ENGINEERING;

ESI HC Threshold:30

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 2

SCOPUS Cited Count: 7

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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