考虑区间不确定性的转子叶尖间隙预测数字孪生模型  

A digital twin model for rotor tip clearance prediction considering interval uncertainty

作　　者：张譍之 孙惠斌[1] 颜诚 刘萌 ZHANG Yingzhi;SUN Huibin;YAN Cheng;LIU Meng(Key Laboratory of High Performance Manufacturing for Aero-Engine,Ministry of Industry and Information Technology,Northwestern Polytechnical University,Xi’an 710072,China;AECC South Industry Company Limited,Zhuzhou 412002,China)

机构地区：[1]西北工业大学航空发动机高性能制造工业和信息化部重点实验室,西安710072 [2]中国航发南方工业有限公司,株洲412002

出　　处：《航空学报》2024年第21期122-135,共14页Acta Aeronautica et Astronautica Sinica

基　　金：国家科技重大专项(J2022-Ⅶ-0001-0043);中央高校基本科研业务费专项资金;国家自然科学基金(52475540)。

摘　　要：为了实现不确定性条件下的转子叶尖间隙高保真建模与高精准预测,首先,分析了转静子装配过程中的不确定性来源、类型及表现形式。其次,建立了考虑区间不确定性的转子叶尖间隙预测数字孪生模型,描述了实体空间中转静子装配及测量过程,虚拟空间中的装配精度表征模型与转子叶尖间隙预测模型。再次,分别介绍了处理足量统计信息和稀疏统计信息的确定性表征模型与区间表征模型,构建了考虑不确定性的转子叶尖间隙预测模型并提出了预测更新方法。最后,以某发动机转静子装配过程为例,评价了转子叶尖间隙预测与更新的准确性和清晰度,并对比了确定性预测和不确定性预测的结果。结果表明,所提方法可实现数字孪生驱动的转静子装配过程高保真建模与高精准预测。In order to achieve high-fidelity modeling and high-precision prediction of rotor tip clearance under uncertainty conditions,this study first analyzed the sources,types,and manifestations of uncertainty in the assembly process of multistage rotor and stator assembly process.Secondly,a digital twin model for predicting rotor tip clearance considering interval uncertainty was established,describing the assembly and measurement process of multistage rotor and stator in physical space,the assembly accuracy characterization model and the rotor tip clearance prediction model in virtual space.Then,deterministic representation models and interval representation models for processing sufficient and sparse statistical information were introduced,and a rotor tip clearance prediction model and prediction update method considering uncertainty were constructed.Finally,taking a multistage rotor and stator assembly process as an example,the accuracy and clarity of rotor tip clearance prediction and update were evaluated,and the results of deterministic prediction and uncertainty prediction were compared.The results showed that the method proposed can achieve high-fidelity modeling and high-precision prediction of multistage rotor and stator assembly process driven by digital twins.

关 键 词：转子叶尖间隙 高保真建模 多源不确定性 数字孪生 装配精度预测 

分 类 号：V239[航空宇航科学与技术—航空宇航推进理论与工程]