Error Averaging Effect in Parallel Mechanism Coordinate Measuring Machine

Hu, Penghao; Yu, Chang-Wei; Fan, Kuang‐Chao; Dang, Xueming; Li, Ruijun

doi:10.3390/app6120383

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…This process is mathematically reflected by iteration and convergence. A similar process exists in the actual motion of rail pairs [23,24].…”

Section: New Idea About Analysis Of Linear Motion Errormentioning

confidence: 61%

Analysis of Motion Errors of Linear Guide Pair Based on Parallel Mechanism

Lei

2021

Machines

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This paper systematically summarized the technical state of art and research results on the motion error of a linear guideway, corrected some misconceptions, and further clarified the relationship between the straightness error of the guide rail itself and the motion error of the linear stage. Moreover, a new method based on parallel mechanism is provided to study the motion errors of the linear guide pair. The basic idea is to abstract the structural relationship between the stage and the guide rail into a 4-bar parallel mechanism. Thus, the stage can be considered as a moving platform in the parallel mechanism. Its motion error analysis is also transferred to moving platform position analysis in the parallel mechanism. The straightness motion error and angular motion error of the stage can be analyzed simultaneously by using the theory of parallel mechanism. Some experiments were conducted on the linear guideway of a self-developed parallel coordinate measuring machine. The experimental data and analysis verify the feasibility and correctness of this method.

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“…This process is mathematically reflected by iteration and convergence. A similar process exists in the actual motion of rail pairs [23,24].…”

Section: New Idea About Analysis Of Linear Motion Errormentioning

confidence: 61%

Analysis of Motion Errors of Linear Guide Pair Based on Parallel Mechanism

Lei

2021

Machines

Self Cite

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“…Santolaria et al [8][9][10]designed a self-centering active probe to identify the kinematic parameters, which dramatically decreases the measurement time and the required number of the measurement points. Hu et al [11] investigates the error averaging effect on the final measuring errors of a coordinate measuring machine. Zhao et al [12] proposed a 3D artifact for the AACMM calibration, which consists of 14 reference points with three various heights.…”

Section: Introductionmentioning

confidence: 99%

A variable-measurement-space-based method for improving the measurement accuracy of AACMMs

Wang¹,

Liang²,

Sun³

et al. 2022

Meas. Sci. Technol.

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Articulated Arm Coordinate Measuring Machines (AACMM) are usually used to measure mechanical parts of different sizes in practical applications. When the size of parts is smaller than that of the AACMM, a redundant measurement space of the measuring machine is generated, resulting in reduced measurement accuracy of the AACMM. Moreover, due to the series structure of the AACMM, the joint errors would be propagated with the increasing length of the bar, which could amplify the measurement error. Therefore, on the premise of ensuring the measurement space required by the measured parts, this work proposes a new method based on variable measurement space, i.e., locking some movable joints of the AACMM, to improve the measurement accuracy of the AACMM for small mechanical parts. The measurement accuracy of the AACMM is examined under various measurement spaces. Firstly, the Monte Carlo method is used to simulate the measurement space of the AACMM with one or more joints locked. Then, the spatial error of the AACMM and the multipoint calibration with joint locked are simulated and discussed in detail. Finally, the feasibility and effectiveness of the proposed variable-measurement-space method are verified by the standard single-point cone experiments. The results show that the measurement accuracy of the AACMM is substantially improved under three kinds of strategies, i.e., locking joint 1, joint 2, and joint 3, respectively.

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