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Investigates accuracy and repeatability of kinematic parameters in industrial robots, indicating the importance of parameter influence.
In this article, we discuss industrial robot characteristics of accuracy and repeatability. The factors that affect these characteristics are identified, and an error tree is developed. Subsequently, the accuracy and repeatability are investigated utilizing the Denavit-Hartenberg kinematics parameters, the homogeneous transformation matrix, and the differential transformation matrix theory, and corresponding measures' are developed. The formulation indicates that the influence matrices associated with joint variables axe constant. A new measure called degree of influence is established that qualitatively assesses .the relative contribution of each kinematic parameter variation to the accuracy and repeatability of rigid manipulators. The developed formulation provides for easy evaluation of the degree of influence measures for rigid manipulators in either numerical or symbolic form. A numerical example is included in which the degree of influence of the kinematics parameters for an articulated manipulator, PUMA 560. are evaluated and analysed.
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Shiakolas et al. (2002) studied this question.
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