设备整机状态评价体系构建及其关键技术研究

发布时间：2018-02-03 22:59

本文关键词： 状态维修状态评价健康度频段振动烈度主成分分析法　出处：《郑州大学》2011年硕士论文　论文类型：学位论文

【摘要】：维修模式从计划维修到状态维修方式的过渡,需要设备状态评价技术的支持。传统的状态评价技术,往往使用较少的评价指标参数,对设备状态信息的利用不够充分,不能达到准确评价设备运行状态的目的。基于此,本文使用频段振动烈度作为状态评价指标,构建了基于多指标参数的指标参数模型。利用主成分分析法的降低维度思想,对多个指标参数进行信息融合处理,得出一个整体性的综合指标值,并作为划分设备状态的依据。本文的主要研究工作如下： 1、阐述了设备状态评价技术的基本理论。介绍了设备状态评价指标体系的构建,包括指标的选取、指标状态阈值的确定等。指标权重的确定方法。对几种常用的设备状态评价数学模型的应用及特点做出简要的对比和分析。对设备状态进行了等级划分。给出设备健康度的定义及计算方法。并建立了设备状态等级与健康度值的映射关系。 2、研究了状态评价指标的选取及计算方法。为提高频域信息的利用率,并充分利用设备状态信息,选取多个频段的振动烈度值作为状态评价指标,并研究了频段振动烈度的计算方法。阐述了评价指标的频段设置方法。将该方法应用于工程实践,结果表明,基于多个频段振动烈度的状态评价指标能够较全面的反映设备的状态信息。 3、提出了基于主成分分析的设备状态评价方法。论述了主成分分析的基本原理及实现步骤,并将主成分分析法应用到设备的状态评价中去。使用该方法对齿轮箱的运行状态进行评价,结果表明,该方法评价的结果与实际情况相符,证明了该方法的合理性、有效性。 4、构建了基于多指标参数的设备状态评价体系。针对不同类型的设备构建相应的状态评价方法。研究了不同类型设备的评价指标选取及相应指标的频段划分方法。最终应用基于主成分分析的设备状态评价模型完成设备运行状态的等级划分。使用该方法对风机设备的运行状态进行评价,结果表明,该方法评价的结果与实际情况相符,证明了该方法的工程实际应用中的可行性。
[Abstract]:The transition of maintenance mode from planned maintenance to condition maintenance requires the support of equipment status evaluation technology. Traditional state evaluation technology often uses less evaluation index parameters, so the equipment state information is not fully utilized. The purpose of accurately evaluating the running state of the equipment can not be achieved. Based on this, the vibration intensity of frequency band is used as the state evaluation index, and the index parameter model based on multiple index parameters is constructed, and the idea of reducing dimension by principal component analysis is used. Through the information fusion of several index parameters, a comprehensive index value is obtained, which can be used as the basis for dividing the state of the equipment. The main research work of this paper is as follows:. 1. The basic theory of equipment state evaluation technology is expounded, and the construction of equipment condition evaluation index system is introduced, including the selection of equipment condition evaluation index. The determination of the threshold value of the index state, the method of determining the index weight, the comparison and analysis of the application and characteristics of several commonly used mathematical models of equipment state evaluation, the classification of the equipment state and the design of the equipment state are given. The definition and calculation method of health degree and the mapping relationship between equipment state level and health degree are established. In order to improve the utilization rate of frequency domain information and make full use of equipment state information, the vibration intensity values of multiple frequency bands are selected as state evaluation indexes. The calculation method of vibration intensity in frequency band is studied, and the method of setting the frequency band of evaluation index is expounded. The method is applied to engineering practice, and the result shows that, The state evaluation index based on the vibration intensity of multiple frequency bands can reflect the state information of the equipment comprehensively. 3. The method of equipment state evaluation based on principal component analysis (PCA) is put forward, and the basic principle and realization steps of PCA are discussed. The principal component analysis method is applied to the condition evaluation of the equipment. The results show that the evaluation results of this method are consistent with the actual situation, and the rationality and effectiveness of the method are proved. 4. The equipment state evaluation system based on multiple index parameters is constructed, and the corresponding state evaluation methods for different types of equipment are constructed. The selection of evaluation indexes for different types of equipment and the frequency band division method of corresponding indicators are studied. Finally, the equipment state evaluation model based on principal component analysis (PCA) is applied to complete the grading of the equipment running state, and this method is used to evaluate the running state of the fan equipment. The results show that the evaluation results of this method are consistent with the actual situation, and the feasibility of the practical application of the method is proved.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH186

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