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논문 기본 정보

자료유형
학술대회자료
저자정보
Kai Egil Berntsen (University of Agder) André Bleie Bertheussen (University of Agder) Ilya Tyapin (University of Agder)
저널정보
제어로봇시스템학회 제어로봇시스템학회 국제학술대회 논문집 ICCAS 2018
발행연도
2018.10
수록면
1,681 - 1,686 (6page)

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초록· 키워드

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In this paper a new combined local/global approach for estimating the combined stiffnesses of joints in anthropomorphic robots is presented. The stiffness of each joint is a combination of several effects: i) stiffness of the links, ii) stiffness of joint bearings and gears and iii) stiffness of the position control loops given by the individual axis controller gains in the controller software. Experimental results are presented for an ABB IRB6600 industrial robot using measurements from a FARO Xi laser tracker and an ATI Omega160 force/torque sensor. The results show that there is a significant variation in stiffness among the individual joints of the robot and that the stiffnesses of the main axes (1-3) are significantly higher than the stiffnesses of the wrist axes (4-6). The results presented in this paper are valid in the home position of the robot, but the method can be modified and used for any robot position. The method requires much less experimental data compared to a global approach. In order to see the impact of pre-loading the joints in the joint stiffness analysis an experiment was conducted on joint 1. The influence of complementary stiffness matrix K<SUB>c</SUB> on Cartesian stifness matrix K<SUB>x </SUB> is also evaluated in this paper.

목차

Abstract
1. INTRODUCTION
2. ROBOT KINEMATICS AND EXPERIMENTAL SETUP
3. STIFFNESS IDENTIFICATION
4. INFLUENCE OF COMPLIMENTARY STIFFNESS MATRIX
5. RESULTS
6. CONCLUSIONS
REFERENCES

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UCI(KEPA) : I410-ECN-0101-2018-003-003540438