Five-degrees-of-freedom error motion measurement method of precision rotary table based on BMPES

观测误差 倾斜(摄像机) 控制理论(社会学) 点(几何) 偏移量(计算机科学) 计算机科学 数学 人工智能 几何学 统计 程序设计语言 控制(管理)
作者
Meng Shao,Xianlei Shao,Xinran Li,Sainan Wang,Songhua Li,Zhe Chen,Dong An
出处
期刊:Measurement Science and Technology [IOP Publishing]
卷期号:34 (7): 075010-075010 被引量:2
标识
DOI:10.1088/1361-6501/acc5a5
摘要

Abstract It is essential to obtain the five-degrees-of-freedom (5-DOF) error motion of a rotary table to reconstructthe real trajectory of the rotating shaft, but there are many error coupling problems when measuring the error motion of a rotary table. In order to improve the measurement accuracy of the 5-DOF error motion of the rotary table, a method of measuring the error motions based on bidirectional multi-point error separation (BMPES) is proposed. First, by analyzing the motion characteristics of the rotary table with multiple degrees of freedom error during the rotation, a detection system with a double-layer structure probe arrangement is designed. Then, the three-point method is used in the radial direction to separate the roundness error of the measuring disk, which improves the measurement accuracy of radial error. Finally, the coupling relationship between the mixing errors collected by the axial probes is researched, and a face-four-point error separation method is proposed, which can separate the flatness error of the lower surface of the measuring disk and complete the decoupling of the tilt error and the axial runout error. Simulation results show that for the measurement of radial, tilt and axial errors, the measurement errors of the BMPES method proposed in this paper are reduced by 97.89%, 68.40% and 99.99%, respectively, compared with the five-point method, and when eccentricity errors exist, the measurement errors of the radial and tilt errors are reduced by 99.06% and 85.67%, which verifies that the method can accurately obtain the 5-DOF motion of the rotary table errors.

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