磁悬浮控制敏感陀螺转子系统在线动平衡方法

夏长峰; 王小乐; 李智; 蒋成伟; 王卫杰; 程富强

doi:10.13700/j.bh.1001-5965.2022.0852

磁悬浮控制敏感陀螺转子系统在线动平衡方法

doi: 10.13700/j.bh.1001-5965.2022.0852

1.
航天器在轨故障诊断与维修重点实验室，西安 700043
2.
航天工程大学宇航科学与技术系，北京 101416

基金项目: 国家自然科学基金(52075545)

详细信息

通讯作者:
E-mail：superxiacf@163.com

中图分类号: V448.2
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出版历程
- 收稿日期: 2022-10-10
- 录用日期: 2022-11-18
- 网络出版日期: 2022-11-23
- 整期出版日期: 2024-11-30

Field balancing method for rotor system of magnetically suspended control and sensing gyro

1.
Key Laboratory for Fault Diagnosis and Maintenance of Spacecraft in-Orbit，Xi’an 700043，China
2.
Department of Aerospace Science and Technology，Space Engineering University，Beijing 101416，China

Funds: National Natural Science Foundation of China (52075545)

More Information

Corresponding author: E-mail：superxiacf@163.com

摘要

摘要:
为改善磁悬浮控制敏感陀螺(MSCSG)转子质量分布，减小转子偏转系统动不平衡振动，提出基于电流响应的磁悬浮转子在线动平衡方法。分析了磁轴承-转子系统的工作原理；确定了质量分布不平衡条件下转子几何轴与惯性轴间的关系模型，对转子静不平衡和动不平衡进行了定量分析；在此基础上，提出利用洛伦兹力磁轴承(LFMB)线性特性的优势，采用二次修正法推导转子校正质量与控制电流间的关系式，对转子不平衡质量进行在线校正，进而改善转子质量分布，从根源上减小转子系统不平衡振动。在线动平衡实验结果表明：所提方法可将转子系统动不平衡振动峰值降低67.7%，验证了方法的有效性。
- 磁悬浮控制敏感陀螺 /
- 洛伦兹力磁轴承 /
- 转子不平衡 /
- 在线动平衡 /
- 二次修正法
Abstract:
A field balancing solution based on current response is proposed to optimize mass distribution and eliminate dynamic unbalanced vibration in the rotor tilt mechanism of a magnetically suspended control and sensing gyro (MSCSG). The working principle of the magnetic bearing-rotor system is first analyzed. Then the geometric analytic relation between the geometric and inertial axis of the rotor is achieved on the condition that the rotor is unbalanced, and the static and dynamic unbalance of the rotor are quantitatively analyzed. On the basis of this, a secondary correction method with the benefit of excellent linearity in Lorentz force magnetic bearing (LFMB) is used to infer the relationship between imbalanced mass and rotor control current. Thus the rotor mass distribution is improved by field balancing, so as to reduce the unbalanced vibration in the rotor system from the root. Experiment results of field balancing show that the proposed method can reduce the dynamic unbalance vibration peak value of the rotor system by 67.7% which verifies the effectiveness of the proposed method.
- magnetically suspended control and sensing gyro /
- Lorentz force magnetic bearing /
- rotor imbalance /
- field balancing /
- secondary correction method

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图 1 MSCSG结构示意图

Figure 1. Structure diagram of MSCSG

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图 2 LFMB-转子系统结构

Figure 2. LFMB-rotor system structure

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图 3 MSCSG转子惯性轴与几何轴关系

Figure 3. Relation between inertial axis and geometric axis of rotor in MSCSG

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图 4 MSCSG转子静不平衡俯视图

Figure 4. Top view of static unbalance in MSCSG rotor

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图 5 MSCSG转子动不平衡俯视图

Figure 5. Top view of dynamic unbalance in MSCSG rotor

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图 6 MSCSG转子在线动平衡原理

Figure 6. Schematic diagram of field balancing for MSCSG rotor

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图 7 MSCSG实验系统

Figure 7. Experimental setup of MSCSG system

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图 8 不平衡质量分布变化示意图

Figure 8. Change of unbalanced mass distribution

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图 9 在线动平衡前后转子偏转响应

Figure 9. Rotor tilt response before and after on-line dynamic balancing

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表 1 MSCSG转子系统的主要参数

Table 1. Main parameters of rotor system in MSCSG

$ {J_{\textit{z}}} $/(kg·m²)	$ m $/kg	$ {k_{{I}}} $/(N·A⁻¹)	n	l_ma/m	L₂/m	L/m	$ {J_{\text{rad}}} $/(kg·m²)	$ {k_i} $/(N·A⁻¹)	$ {k_h} $/( N·m⁻⁶)	B/T	L₁/m	$ r $/m
0.0287	8.951	28.91	200	0.059	0.024	0.062	0.0097	19.84	−0.58	0.4	0.024	0.084

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