Digital twin-based health service framework and its application in permanent magnet synchronous motors
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摘要:
现代机电系统研制周期短、健康服役要求高，传统的设计方法已无法满足研制需求，尤其无法表征机电系统健康服役状态变化、性能退化及外部干扰和不确定性的影响。针对该问题，聚焦机电系统健康服役，提出一种基于数字孪生的机电系统健康服役框架，旨在高效利用全生命周期数据实现快速迭代。该框架涵盖了设备的整个服役周期，能够利用不同阶段的工况数据更新数字孪生模型，实现对设备实时状态的准确检测。这种基于数字孪生的方法不仅能够在模型中模拟机电系统的服役状态，还能实时评估机电系统的健康状态，更好地满足现代机电系统的研制和服役需求。以航空航天领域常用的机电驱动设备永磁同步电机为例，证明了所提方法的有效性和实用性。
Abstract:The modern equipment development cycle is short, and health service requirements are high; and traditional design methods can no longer meet the needs of equipment development, especially the changes in the health service status of equipment, performance degradation, and the impact of external interference and uncertainty. In order to solve the above problems, this paper focuses on equipment health service and proposes a digital twin-based equipment health service framework, which aims to efficiently use the whole life cycle data to achieve rapid iteration. In order to accurately detect the equipment’s current status in real time, the framework can update the digital twin with operating condition data at various times over the equipment’s whole service life cycle. This digital twin-based approach not only simulates the service status of equipment in the model, but also enables real-time assessment of the health status of the equipment. Through this method, it is possible to better meet the needs of the development and service of modern equipment. To demonstrate the efficacy and viability of the suggested approach, this study uses the permanent magnet synchronous motor, a widely used electromechanical drive device in the aerospace industry, as an example.
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图 2 虚拟对象、本体参数和状态参数示意图
Figure 2. Schematic diagram of virtual objects, ontology parameters, and state parameters
图 5 永磁同步电机的数字孪生系统
Figure 5. Digital twin system of permanent magnet synchronous motors
图 6 不同工况下孪生数据的迭代更新结果
Figure 6. Iterative update results of twin data under different working conditions
图 9 实体电机及其孪生体不同服役期电流对比
Figure 9. Comparison of current of physical motor and its twin in different service periods
表 1 永磁同步电机关键参数值
Table 1. Key parameter values of permanent magnet synchronous motor
本体参数 数值 磁链 $ {\psi }_{f} $/Wb 0.153 电感L（Ld=Lq=L）/mH 1.24 电阻R/Ω 0.36 
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表 2 永磁同步电机健康维护措施
Table 2. Health maintenance measures for permanent magnet synchronous motors
健康状态 维护措施 轻度退化 定期清洁，正常使用 中度退化 调整磁极位置，检查绕组 重度退化 更换永磁体，检修电机其余部件 再次重度退化 更换整个电机
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