GB/T 47113-2026Stability evaluation of active magnetic bearings (English PDF)

Foreword

This document conforms to GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting is scheduled. Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the National Working Group on Basic and Application Standardization of Maglev Power Technology (SAC/SWG 28). This document was prepared by the National Working Group on Standardization of Maglev Power Technology Fundamentals and Applications (SAC/SWG 28) and the National Working Group on Standardization of Sliding Bearings. It is jointly managed by the Technical Committee (SAC/TC 236). This document was drafted by: CRRC Zhuzhou Electric Co., Ltd., Shandong Tianrui Heavy Industry Co., Ltd., Wuhan University of Technology, and Beijing University of Aeronautics and Astronautics. Universities, Wolong Electric Drive Group Co., Ltd., Luoyang Bearing Research Institute Co., Ltd., Qingdao Haier Air Conditioning Electronics Co., Ltd., Suzhou Suzhou Maglev Intelligent Technology Co., Ltd., Nanjing Huichuan Technology Co., Ltd., Hunan Lingxiang Maglev Technology Co., Ltd., Shanghai Institute of Applied Physics, Chinese Academy of Sciences The Institute of Physics, Zhejiang Gaoxuan Power Equipment Co., Ltd., Shandong Maglev Industry Technology Research Institute Co., Ltd., and Weifang Vocational College were involved. Hangzhou Kunte Maglev Technology Co., Ltd., Shanghai Industrial Environment & Water Co., Ltd., and Tianrui Maglev Intelligent Manufacturing (Shandong) Co., Ltd. The main drafters of this document are. Zhou Liang, Li Yongsheng, Hu Yefa, Zheng Shiqiang, Zheng Yanwen, Zhu Changsheng, Zhang Jieyu, Li Wenchao, Zhang Jie, and Zhou Limin. Yin Chengke, Pang Gucai, Zhou Wenwu, Zhang Jianyu, Hu Gui, He Yanhui, Zhang Haigang, He Xiaohong, Ma Xiaomei, Gu Chao, Zhang Hui, Wang Weixiang, Li Zhiyu Jie Yonghui, Zhang Yin, Suo Wei, Wang Yue, Shi Changyu, Liu Lele, Zhang Xingang, Zhao Mingshi, Du Hongxiang, Yue Qin, Wang Xianzhong, Bi Yuqi. Stability evaluation of active magnetic levitation bearings

1 Scope

GB/T 47113-2026 is the Chinese national standard covering whether a magnetic bearing's control loop is stable - the sensitivity function and its peak, the margins, the behaviour through the rotor's critical speeds and under disturbance, on a bearing that holds a shaft up only as long as its feedback keeps working. First edition, 17,000 words, with GB/T 47117-2026 on stator inspection. It was issued on 28 January 2026 and has been in force since 1 August 2026, as a first edition. The document is under the responsibility of the Standardization Administration of China. This page is published from the official record of the 2026 edition; the clause text of a standard this recent is not yet in circulation, and the figures, limits and tables it contains are those of the document itself, delivered in full with the English translation.

This document specifies the stability evaluation requirements and methods for active magnetic levitation bearing-supported rigid rotor systems, and classifies stability through frequency domain analysis. Qualitative rating describes the testing methods and evaluation criteria. This document applies to the stability evaluation of a rigid rotor system supported by an active magnetic levitation bearing in rotating machinery under given operating conditions. This document applies to rigid rotor systems supported by active magnetic levitation bearings, where rotor vibration displacement is the control objective (hereinafter referred to as "active magnetic levitation bearings"). For active magnetic levitation bearing systems that use other variables as control targets, please refer to this document for implementation.

Note. This document serves as a reference for the stability evaluation of a flexible rotor system supported by an active magnetic levitation bearing under given operating conditions. This document does not cover rotor overcritical rotation. The problem of vibration control at high speeds.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are listed below. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document.

GB/T 2900.56 Electrical Engineering Terminology - Control Technology

GB/T 46078 Terminology for Magnetic Levitation Power Technology

3 Terms and Definitions

The terms and definitions defined in GB/T 2900.56 and GB/T 46078, as well as the following terms and definitions, apply to this document.

3.1 stability When subjected to an initial offset or disturbance that is sufficiently small relative to the rest position, the system state variables and output variables can be kept at that position sufficiently. System characteristics within a small neighborhood. [Source: GB/T 2900.56-2008, 351-21-30]

3.2 Stability of active magnetic bearings Under given operating conditions, the dynamic response of a rotor system supported by an active magnetic levitation bearing can recover after being disturbed in equilibrium. The ability to return to the original equilibrium state or converge to a new equilibrium state.

3.3 Closed-loop transfer function For a linear time-invariant system under closed-loop control with zero initial conditions, the Laplace transform of the output variable and the Laplace transform of the corresponding input variable are... The ratio of the Gaussian transform.

Note. The closed-loop control process of the active magnetic levitation bearing system based on displacement control is shown in Figure

1.Its closed-loop transfer function Gc is the ratio of the displacement measurement signal V3 to the reference signal V3. The ratio of the Laplace transform of the displacement signal V1, i.e., Gc(s) = V3(s)/V1(s). In the formula. Gc -- Closed-loop transfer function; s -- Laplace operator.