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Calibration Algorithm of a Spring Static Balancer

  • Chang-Hyun Cho
  • Mun-Taek Choi
Regular Paper
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Abstract

This paper proposes a calibration algorithm of a spring static balancer to overcome uncertainties of link parameters or spring constants. The location of the spring attachment is adjusted in this paper considering unbalancing torques. Various algorithms are suggested to determine the location of the spring attachment: 1) an estimation algorithm for static situation is derived from the design equation of the space mapping method; 2) TDE (time delay estimation) is adopted to derive estimation algorithms; 3) an estimation algorithm with no joint torque sensing is derived on the basis of TDE. TDE is adopted to estimate unbalancing static torques. The proposed algorithms are evaluated with the two-dof (degree of freedom) manipulator with the bevel gravity compensator in that two springs are located at the same link. Performances of the proposed algorithms are compared with experimental results. Application to the case of the varying load is discussed and it is showed that the suggested algorithms are applicable to the both cases of uncertainties and varying loads.

Keywords

TDE Static balancer Gravity compensator Spring Calibration 

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Copyright information

© Korean Society for Precision Engineering and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Mechanical Systems and Automotive EngineeringChosun UniversityDong-gu, GwangjuRepublic of Korea
  2. 2.School of Mechanical EngineeringSungkyunkwan UniversitySuwon-si, Gyeonggi-doRepublic of Korea

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