A method for eliminating detection error of an eddy current sensor based on roundness compensation

CN119437016BActive Publication Date: 2026-08-28BEIJING INST OF CONTROL ENG
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202411402788.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-09
Publication Date
2026-08-28
Estimated Expiration
2044-10-09

AI Technical Summary

Technical Problem

[0006]从零件角度，传统的磁悬浮轴系中几乎都是通过提高检测节圆的加工精度，并提高电涡流传感器等的装配精度，从而提升反馈精度，而加工精度和安装误差只能逐渐减小，但是无法完全消除，因此完全依靠加工装配等方式提高悬浮指向控制精度无疑增加产品的研制成本

Benefits of technology

（1）本发明针对磁悬浮旋转关节在旋转过程中的零件误差也周期旋转，充分利用差动传感器的高精度测量能力，消除了各传感器的安装偏心，并对各传感器测量值中的圆度误差进行实时补偿，从而消除了定子轴在检测节圆处的圆度等形貌误差；由于充分利用了全部传感器的测量信息，任意一个传感器的漂移影响都可减小，提高了轴心位置检测的精度，并在部分传感器失效时，仍然可在较高的精度下检测出轴心的相对位置，提高了传感器系统的可靠性；

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119437016B_ABST
    Figure CN119437016B_ABST
Patent Text Reader

Abstract

A kind of roundness compensation-based eddy current sensor detection error elimination method, first in the state of mechanical shafting support, the roundness error and other topography errors of stator shaft are detected using the eddy current sensor provided with magnetic suspension bearing, and error curve is established by phase alignment;Then in the state of magnetic suspension shafting support, the detection data of eddy current sensor is compensated according to phase by using optimization method and error curve, so as to eliminate the roundness and other topography errors of stator shaft at the detection section, improve the relative pose detection accuracy of magnetic suspension rotary joint stator and rotor, and provide reference for the control law design of subsequent satellite high-precision attitude control.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Radial magnetic bearing electrical vortex sensor integrated structure for magnetic levitation high-speed electric machine

    CN102829709A

  • Unbalanced compensation algorithm of polygonal iterative search with variable step size for rotor imbalance coefficient

    CN107133387A