基于规则的旋转机械轴系故障诊断研究与实现

发布时间：2018-02-02 04:46

本文关键词： 汽轮机燃气轮机轴系故障诊断案例分析　出处：《上海交通大学》2013年硕士论文　论文类型：学位论文

【摘要】：电厂发电过程中，最重要的是保证机组的安全和稳定运行，一旦发生机组故障，会对工业生产和居民生活造成巨大的影响。一直以来，人们对故障诊断技术在发电机组上的应用进行了深入广泛的研究，但是发电机组的故障种类繁多，故障的影响因素复杂，这给故障诊断带来的很大的困难。针对上述难题，本文提出了一种基于隶属度的层次分类和诊断模型，，能够成功解决实际电厂的常见故障。发电机组的故障种类很多，本文首先对常见的机组故障进行了综述，分析了各类故障的机理，阐述了故障发生的现象，并详细介绍了故障振动特征，作为建立层次分类模型的基础。层级分类的方法具有详细的理论概念，通过对分类数据的抽象，建立相应的证据模式，形成知识组织和表达方式，从而形成完整的故障诊断的推理、控制与解释机制。基于隶属度的层次分类诊断方法是对层次分类方法扩展的应用，通过对机组常见故障的具体分析，建立故障层次，形成层次分类诊断模型，并完成相应的知识组织与表达，最终达到建立层次分类故障诊断模型和规则的目的。最后应用完成的层次分类诊断模型于常见的几种机组故障，如热不平衡故障和动不平衡故障等，通过对实际故障数据的频谱分析，分析故障的振幅和相位特点，成功找到了故障源，为最终解决故障问题提供了有力的支持。
[Abstract]:Power generation process, the most important is to ensure the safe and stable operation of the unit, once the fault, will have a huge impact on the industrial production and the lives of the residents. All the time, people have conducted extensive researches on the application of fault diagnosis technology in generators, but the types of fault generator are factors the influence of the complex fault, fault diagnosis to bring great difficulties. To solve the above problems, this paper proposes a hierarchical classification model based on membership and diagnosis, can successfully solve the common faults of the actual power plant.
There are many kinds of fault generator, this paper firstly reviews the common fault, analyzed the failure mechanism, expounds the fault phenomenon, and introduces the fault vibration characteristics, as a basis for establishing the hierarchical classification model. The method of level classification has the theoretical concept in detail, based on the classification of data abstract to establish the corresponding evidence model, the formation and expression of knowledge organization, thus forming a complete fault diagnosis reasoning, control and interpretation mechanism. A hierarchical classification diagnostic method based on degree of membership is extended to the classification method, by analyzing the common faults of units, the establishment of fault level, forming a hierarchical classification diagnostic model, and complete the corresponding organization and expression of knowledge, and ultimately achieve the establishment of hierarchical fault diagnosis model and hierarchical classification rule. Finally complete the application The diagnostic model is based on several common unit failures, such as thermal imbalance and dynamic imbalance. By analyzing the spectrum of the actual fault data, the amplitude and phase characteristics of the fault are analyzed, and the source of the fault is successfully found, which provides strong support for the final solution of the failure problem.

【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH165.3;TM307

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