基于知识图谱的航空发动机PHM仿真验证平台设计

Design of Aircraft Engine PHM Simulation and Verification Platform Based on Knowledge Graph

针对航空发动机PHM系统功能、性能验证要求高、验证内容多、验证业务复杂等实际问题,分析了国外先进航空发动机PHM系统开发验证情况及经验,提出了一种基于知识图谱技术的PHM仿真验证平台设计方法;该方法利用了知识图谱在具有的半结构化、高效性、直观性等特点,实现了发动机PHM验证涉及到的故障模式、故障特征、算法模型及专家知识等大量信息知识的有效组织与管理;在此基础上,进一步面向发动机PHM验证数据量大、计算需求高等需求,采用大数据、数据挖掘、机器学习、云服务等技术,搭建了基于知识图谱的航空发动机PHM仿真验证平台,实现了数据挖掘与信息提取、专家知识获取、多层级融合诊断智能导向型推理等应用;最后,以某型发动机为对象,介绍了发动机PHM仿真验证情况;经实际验证结果分析,该文提出的PHM仿真验证平台能够有效解决航空发动机PHM系统可验证的历史故障样本少、验证功能单一等问题。

In response to practical issues such as high requirements for functional and performance verification of the aviation engine PHM system,multiple verification contents,and complex verification business,this paper analyzes the development and verification situation and experience of advanced aviation engine PHM systems abroad,and proposes a design method for a PHM simulation verification platform based on knowledge graph technology.This method utilizes the semi structured,efficient,and intuitive characteristics of knowledge graph to effectively organize and manage a large amount of information knowledge related to engine PHM validation,including fault modes,fault features,algorithm models,and expert knowledge.On this basis,further targeting the demand for large amounts of data and high computational requirements in engine PHM verification,a knowledge graph based aviation engine PHM simulation verification platform has been established using technologies such as big data,data mining,machine learning,and cloud services.Applications such as data mining and information extraction,expert knowledge acquisition,and multi-level fusion diagnosis intelligent guided reasoning have been implemented.Finally,taking a certain type of engine as the object,the PHM simulation verification of the engine was introduced.After analyzing the actual verification results,the PHM simulation verification platform proposed in this article can effectively solve the problems of limited historical fault samples and single verification function that can be verified in the aviation engine PHM system.