超精密轴向定位平台力特性分析及自抗扰控制

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中图分类号：TP273 文献标志码：A DOI： 10.12305/j.issn.1001-506X.2026.03.24

Abstract： To address the requirements of short stroke， high precision， high dynamic response， and strong disturbance rejection for ultra-precision axial positioning platforms （UAPP） in micro-gravity space optical payload ground testing environment，a UAPP scheme thatorganicallyintegrates a actuator/bearing configurationanda high-performance controlalgorithisproposed.Thetree-dimensionalfiniteelementmethodisusedtodeplyinvestigatetheforceandstifess characteristicsof the four-quadrant permanent magnet arryLorentz forcemotorand unequal width Halbach arraymagnetic bearing as theyvary with displacement，layingthefoundation for establishinganaccurate dynamic modeland performance analysis.Acomposite nonlinear fedback active disturbance rejection controlbased ona nominal auxiliarymodel （NAMCNFADRC） algorithm is proposed.Both simulation and experimental results demonstrate that，compared to proportionintegration-diferentiationandclasic second-order linearactive disturbancerejectioncontrol algorithms，NAM-CNFADRC exhibits significant advantages in tracking accuracy，maximum overshoot，setling time，and disturbance rejection.

Keywords：Lorentz force motor;magnetic bearing；ultra-precision axial positioning platform （UAPP）； force characteristics analysis；active disturbance rejection control （ADRC）

0 引言

作状态和微小扰动环境，准确评估载荷性能，对地面测试设备提出了严峻挑战[1-2]。（剩余16761字）