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标 题： An Accurate Linearization of Electromagnetic Force of Heteropolar Magnetic Bearings With Redundant Structures
带冗余结构的异极磁轴承电磁力的精确线性化
作 者： Xin, Cheng
Baixin Cheng
Han, Liu
Allen, G. M.
关键词： SWITCHING POWER-AMPLIFIER  [切换功率放大器]
FAULT-TOLERANT CONTROL  [ 容错控制]
HOMOPOLAR  [ 同性极化]
DESIGN  [ 设计]
ROTOR  [ 转子]
IMPLEMENTATION  [ 实施]
PRECISION  [ 精准]
LOSSES  [ 损失]
SYSTEM  [ 系统]
出版年： 2020
期刊名： Journal of engineering for gas turbines and power: Transactions of the ASME
燃气轮机与动力工程杂志：美国机械工程师学会会刊
年卷期： 2020, vol.142, no.9
摘 要： <abstract_text><p>Fault tolerance is one of the practical and effective approaches to improve the reliability of magnetic bearings. The linearization of the electromagnetic force (EMF) from the redundant structures is the crucial basis of the design of a fault-tolerant controller. In this paper, we propose an accurate linearization approach for the heteropolar magnetic bearings with redundant structures by solving the Taylor series expansion equation of the current distribution matrix (W) in the nonequilibrium position and introducing a set of displacement compensation matrices to establish a unified accurate EMF model including the controlled current and rotor position. The proposed approach can effectively decrease the EMF error between the actual physical model and the linearized model compared with the existing methods for the consideration of the rotor position. Moreover, the solutions of the current distribution matrix and the relevant optimization approach have been presented on the basis of the proposed approach to help to design a high-performance fault-tolerant controller in the entire rotor displacement range. The numerical results demonstrated the noticeable accuracy advantages of the proposed EMF model.</p></abstract_text>

<摘要文本>； <容错性是提高磁悬浮轴承可靠性的实用且有效的方法之一。冗余结构下电磁力（EMF）的线性化是设计容错控制器的关键基础。本文提出一种针对异极磁悬浮轴承中冗余结构的精确线性化方法，通过求解非平衡位置下电流分布矩阵（W）的泰勒级数展开方程，并引入一组位移补偿矩阵，建立一个统一且精确的电磁力模型，该模型包含控制电流和转子位置。与现有考虑转子位置的方法相比，所提出的方案能有效降低实际物理模型与线性化模型之间的电磁力误差。此外，基于该方法还给出了电流分布矩阵的求解及相应的优化策略，有助于在转子整个位移范围内设计高性能的容错控制器。数值结果表明，所提出的电磁场模型具有明显的精度优势。/
中文内容为网络AI翻译，专业术语未必准确，仅供参考。

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