A measurement error control method, medium and device based on sampling frequency and installation eccentric error

By establishing a signal model and harmonic decomposition to optimize the number of sampling points and sensor angle, the leakage problem of standard ball installation eccentricity error in high-order harmonics was solved, achieving high-precision and reliable measurement of spindle rotation error, and reducing operation difficulty and cost.

CN122151680APending Publication Date: 2026-06-05HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INST OF TECH
Filing Date
2026-03-16
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In the existing technology, the standard ball installation eccentricity error is misjudged as containing only the first harmonic, ignoring its leakage effect in the 2nd to 50th harmonics, which leads to the distortion of the spindle synchronous rotation error assessment results. Furthermore, there is a lack of quantitative relationship between the key parameters of the measurement system and higher-order errors, making it impossible to effectively control the measurement error.

Method used

A displacement sensor output signal model is established under the conditions of standard sphere installation eccentricity, standard sphere radius, and spindle rotation angle. Harmonic components from the 2nd to the 50th order are extracted through equal-angle discrete sampling and harmonic decomposition. The number of sampling points and standard sphere radius are optimized according to the variation law of harmonic components to suppress high-order harmonic errors. The sensor arrangement angle is determined through a multi-objective optimization algorithm to reduce noise amplification.

Benefits of technology

It significantly improves the accuracy and reliability of spindle rotation error measurement, reduces operation difficulty and cost, achieves high-precision synchronous spindle rotation error measurement, and ensures the robustness and stability of measurement results.

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Abstract

The present application relates to the field of ultra-precision measurement, and particularly relates to a measurement error control method based on sampling frequency and installation eccentric error, a medium and equipment. The method is used for suppressing the error caused by the installation eccentricity of the standard ball in the synchronous rotation error measurement of the main shaft. The method establishes a displacement signal model containing the installation eccentricity, the radius of the standard ball and the rotation angle of the main shaft, obtains a discrete sequence through equiangular discrete sampling, performs 2-50 order harmonic decomposition on the discrete sequence to represent the eccentric error, and according to the change law of the harmonic amplitude with the eccentricity, the ball radius and the sampling point number, configures the system parameters to make the high-order error within the target range. The advantages of the method are as follows: the 2-50 order harmonic error distribution is accurately revealed, and the evaluation distortion is avoided; the error is actively controlled by optimizing the ball radius and the sampling point number, and the dependence on the installation precision is reduced; the mechanism of the sampling point number for suppressing the spectral aliasing is clear, and the measurement robustness and repeatability are improved.
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