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2019 Prognostics and System Health Management Conference (PHM-Qingdao)最新文献

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A Modeling and Calculating Method for Mission Reliability of Multiple Use Schemes System 多用途方案系统任务可靠性建模与计算方法
Pub Date : 2019-10-01 DOI: 10.1109/phm-qingdao46334.2019.8942875
Zhang Yang, Xu Dong, Cheng Hongwei
Considering the difficulty in designing large electromechanical systems and high cost for construction, the system redundancy design often prepares a variety of use schemes in advance, while the cost-benefit ratio of parallel, voting and other redundant methods employed by electronic equipment is not efficient enough. Based on discrete simulation algorithm, this paper proposes a method to model and calculate the mission reliability block diagram for multiple use schemes system, which is easy to understand and applicable, and helpful to get a quick result.
考虑到大型机电系统设计难度大、施工成本高,系统冗余设计往往提前准备好多种使用方案,而电子设备采用的并联式、投票式等冗余方式的成本效益比不够高效。本文提出了一种基于离散仿真算法的多用途方案系统任务可靠性框图建模与计算方法,该方法易于理解和应用,有助于快速得出结果。
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引用次数: 0
Investigation of Feature Effectiveness in Polymer Electrolyte Membrane Fuel Cell Fault Diagnosis 聚合物电解质膜燃料电池故障诊断特征有效性研究
Pub Date : 2019-10-01 DOI: 10.1109/phm-qingdao46334.2019.8942975
Weitao Pan, Y. Y. A. Abuker, L. Mao
This paper investigates effectiveness of various features in fault diagnosis of polymer electrolyte membrane fuel cell (PEMFC) system, including RMSF (root mean square frequency), ACSD (autocorrelation standard deviation) and kurtosis. Test data is collected from a PEMFC system with various conditions, such as normal operation, flooding and drying out scenarios. By extracting selected features from PEMFC voltage, the performance of various features in isolating PEMFC states is investigated using k-means clustering. Results demonstrate that the combination of RMSF and ACSD could provide reliable fault diagnostic performance. Moreover, kurtosis might be used as a fast diagnostic indicator for various PEMFC degradation mechanisms.
本文研究了各种特征在聚合物电解质膜燃料电池(PEMFC)系统故障诊断中的有效性,包括RMSF(根均方频率)、ACSD(自相关标准差)和峰度。测试数据是从PEMFC系统在各种条件下收集的,例如正常运行、水浸和干燥情况。通过从PEMFC电压中提取选定的特征,利用k-means聚类研究了各种特征在隔离PEMFC状态中的性能。结果表明,结合RMSF和ACSD可以提供可靠的故障诊断性能。此外,峰度可作为各种PEMFC降解机制的快速诊断指标。
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引用次数: 2
A Virtual Model To Predict The Influence Of Indexing Errors On The Transmission Error Of Spur Gears 分度误差对直齿齿轮传动误差影响的虚拟预测模型
Pub Date : 2019-10-01 DOI: 10.1109/phm-qingdao46334.2019.8942832
Chongfeng Zhao, Jinglin Wang, Yongzhi Qu, Liu Hong, Zidong Liu, Yuegang Tan
The transmission error of a gear pair is one of the main excitations that cause the vibration and noise problems of gearboxes. The root causes of the transmission error include the gear manufacturing errors, the installing errors and the elastic deformation of meshing gear teeth. Although the transmission error have a significant influence on the dynamics of gear pairs, most of the previous studies just employ simplified mathematical functions to qualitatively represent its periodicity. Only recently, the experimental study was conducted to investigate the detailed properties of the transmission errors in quasi-static conditions, which requires strong expertise and costly precision equipment. Therefore, to give a quick evaluation of the properties of transmission error, this paper proposes a virtual model to numerically predict the transmission error of a spur gear pair in the static condition. The model is capable to simulate the transmission error that is caused by typical gear manufacturing and installing errors like the indexing errors and run-out errors. The simulated transmission errors agree with the experimental phenomenon observed in previous published works. The proposed virtual model has the potential to assist in the in-depth analysis and modeling of dynamic behavior of gear transmissions.
齿轮副的传动误差是引起齿轮箱振动和噪声问题的主要激励因素之一。产生传动误差的根本原因包括齿轮制造误差、安装误差和啮合齿轮齿的弹性变形。虽然传动误差对齿轮副动力学的影响很大,但以往的研究大多采用简化的数学函数来定性表征其周期性。直到最近,才进行了准静态条件下传动误差详细特性的实验研究,这需要强大的专业知识和昂贵的精密设备。因此,为了快速评估传动误差的性质,本文提出了一个虚拟模型来数值预测正齿轮副在静态条件下的传动误差。该模型能够模拟由齿轮分度误差和跳动误差等典型的制造和安装误差引起的传动误差。模拟的传输误差与前人的实验结果一致。提出的虚拟模型有潜力协助深入分析和建模的动态行为的齿轮传动。
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引用次数: 0
Degradation Trend Prediction of Linear Regulator Based on SVR Under Nuclear Radiation Stress 基于SVR的线性调节器在核辐射胁迫下的退化趋势预测
Pub Date : 2019-10-01 DOI: 10.1109/phm-qingdao46334.2019.8942997
Hongwei Qiao, Li Zhan, Jie Liu, Lin Zhang, Zhangchun Tang, Jia Xie
Due to the development of science and technology, many electronic products still need a long time to degrade and fail under the condition of accelerated life test, especially under the harsh test conditions such as nuclear radiation, and it brings great challenges to research on the reliability of electronic products. In order to obtain the performance index of electronic product degradation failure, this paper proposes to use support vector regression(SVR) method to predict the performance degradation index of AP1117E series linear voltage stabilizer under nuclear radiation stress, and use the degradation data obtained from the test and the predicted degradation data to complete the reliability evaluation of the device. The prediction method proposed in this paper is used in the actual reliability assessment engineering project, and it has played a certain suggestive role for future reliability assessment work.
由于科学技术的发展,许多电子产品在加速寿命试验的条件下,特别是在核辐射等恶劣的试验条件下,仍然需要很长时间才能降解失效,这给电子产品可靠性的研究带来了很大的挑战。为了获得电子产品退化失效的性能指标,本文提出采用支持向量回归(SVR)方法预测AP1117E系列线性稳压器在核辐射应力下的性能退化指标,并利用试验获得的退化数据和预测的退化数据完成对器件的可靠性评估。本文提出的预测方法在实际的可靠性评估工程项目中得到了应用,对今后的可靠性评估工作起到了一定的提示作用。
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引用次数: 0
A Novel Fast-EIS Measuring Method And Implementation for Lithium-ion Batteries 一种新型的锂离子电池快速eis测量方法及实现
Pub Date : 2019-10-01 DOI: 10.1109/phm-qingdao46334.2019.8942995
P. Lu, Ming Li, Liqiang Zhang, Liqin Zhou
Energy store batteries play very important roles in the marine energy power station. Monitoring batteries’ state for PHM study is necessary. Electrochemical Impedance Spectroscopy (EIS) is commonly used in battery state monitor. It can acquire detailed health features of batteries. This paper purposes a Fast-EIS measuring method, including the hardware design and frequency-mixing measuring algorithm based on the Fast Fourier Transformation (FFT). It can measure the EIS with a frequency range from 0.01Hz to 10kHz, and reduce 2/3 of the measuring time compared to the commercial electrochemical workstation, with enough accuracy. This method is suitable for implementation and engineering applications.
储能电池在海洋能源电站中起着非常重要的作用。电池状态监测是PHM研究的必要条件。电化学阻抗谱(EIS)是常用的电池状态监测方法。它可以获取电池的详细健康特征。本文提出了一种Fast- eis测量方法,包括硬件设计和基于快速傅里叶变换(FFT)的混频测量算法。它可以在0.01Hz ~ 10kHz的频率范围内测量EIS,与商用电化学工作站相比,测量时间缩短了2/3,具有足够的精度。该方法适合于实现和工程应用。
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引用次数: 5
Study on the oil particle contamination forecasting Using LSTM network 基于LSTM网络的油颗粒污染预测研究
Pub Date : 2019-10-01 DOI: 10.1109/phm-qingdao46334.2019.8942869
Liangliang Zhai, Kun Yang, Biao Hu, Shuai Li
As one of the main techniques of equipment condition monitoring, oil monitoring technology plays an extremely important role in evaluating the current state of equipment and predicting the development trend of equipment. In this paper, the LSTM neural networks was established by the historical data collected by a power plant. Using the cross validation method, and compared whit the popular time series prediction algorithm LSM, ARIMA, BPNN, SVR and RFR in the same test set, LSTM got the lowest RMSE value 42.26, which validates the applicability and accuracy of the LSTM neural network in the prediction of oil particle contamination.
油液监测技术作为设备状态监测的主要技术之一,对评价设备的现状、预测设备的发展趋势具有极其重要的作用。本文利用某电厂的历史数据,建立了LSTM神经网络。采用交叉验证方法,并在同一测试集中与流行的时间序列预测算法LSM、ARIMA、BPNN、SVR和RFR进行比较,LSTM的RMSE值最低,为42.26,验证了LSTM神经网络在油颗粒污染预测中的适用性和准确性。
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引用次数: 0
A Cross Domain Feature Extraction Method for Bearing Fault diagnosis based on Balanced Distribution Adaptation 基于平衡分布自适应的轴承故障诊断跨域特征提取方法
Pub Date : 2019-10-01 DOI: 10.1109/phm-qingdao46334.2019.8942996
Jiawei Gu, Yanxue Wang
Traditional intelligent fault diagnosis techniques for rotating machines have two limitations: 1) Big data with fault information is not available in some cases; 2) The training and testing data are often drawn under discrepant distribution. Thus, transfer component analysis (TCA) has been designed to reduce the distance of marginal distribution between domains. The joint distribution adaptation (JDA) was proposed to simultaneously reduced the difference between the conditional distribution and marginal distribution in source or target domains. However, these two distributions are often treated equally in these existing methods, which will lead to poor performance in practical applications. Therefore, a cross-domain feature extraction method based on balanced distribution adaptation algorithm(BDA) has been proposed, which can adaptively utilize the importance of difference between marginal distribution and conditional distribution. It should be noted that several existing cross domain feature extraction methods can be treated as special cases of BDA. As a new method in the field of transfer learning, BDA is an effective cross-domain feature extraction method. The validity of the BDA algorithm has been successfully evaluated in the actual data set in this paper.
传统的旋转机械智能故障诊断技术存在两大局限性:1)在某些情况下无法获得包含故障信息的大数据;2)训练和测试数据通常是在差异分布下绘制的。因此,转移分量分析(TCA)被设计用于减小域间边际分布的距离。提出联合分布自适应(JDA)方法,同时减小源域和目标域条件分布与边际分布之间的差异。然而,在这些现有的方法中,这两种分布往往被同等对待,这将导致在实际应用中的性能不佳。为此,提出了一种基于平衡分布自适应算法(BDA)的跨域特征提取方法,该方法可以自适应地利用边缘分布与条件分布之间差异的重要性。需要注意的是,现有的几种跨域特征提取方法可以作为BDA的特殊情况。作为迁移学习领域的一种新方法,BDA是一种有效的跨域特征提取方法。本文在实际数据集中成功地评价了BDA算法的有效性。
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引用次数: 4
Degradation Modeling of Digital Multimeter with Multiple-performance Indicators in Multi-stress Dynamic Marine Environment Based on Vine Copula 基于Vine Copula的多应力动态海洋环境下多性能指标数字万用表退化建模
Pub Date : 2019-10-01 DOI: 10.1109/phm-qingdao46334.2019.8943021
Zixuan Yu, Tingting Huang, Xin Wu, Kun Zhou
A digital multimeter working in the marine environment suffers from complex environmental stresses of time-varying temperature, relative humidity and salinity. It is used to measure five indicators of Resistance (R), Direct Current Voltage (DCV), Alternating Current Voltage (ACV), Direct Current (DC) and Alternating Current (AC), and there is an interactive relationship between the five indicators due to the complex structure among the components of multimeter.Considering the measurement errors data of five indicators of digital multimeter as the degradation signal, this paper establishes a degradation model to predict the reliability of each single indicator considering the time-varying environmental stresses based on Brownian motion. The typical D-vine copula is utilized to describe the correlations of multiple performance indicators, the parameters of the optimal D-vine model can be estimated by maximum likelihood estimation. In this paper, lifetime of the multimeter working in marine environment with multiple-performance indicators can be predicted accurately. A case study is presented as an application of this method.
在海洋环境中工作的数字万用表承受着温度、相对湿度和盐度随时间变化的复杂环境应力。万用表用于测量电阻(R)、直流电压(DCV)、交流电压(ACV)、直流(DC)和交流电流(AC)五个指标,由于万用表各部件之间结构复杂,这五个指标之间存在着相互作用的关系。以数字万用表5个指标的测量误差数据为退化信号,建立了基于布朗运动的考虑时变环境应力的单个指标可靠性退化模型。利用典型的D-vine联结来描述多个性能指标之间的相关性,通过极大似然估计来估计最优D-vine模型的参数。本文对具有多种性能指标的海洋环境下的万用表寿命进行了准确预测。最后给出了一个应用实例。
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引用次数: 0
Weak Fault Feature Enhancement of Acoustic Data Based on Variational Mode Decomposition 基于变分模态分解的声学数据弱故障特征增强
Pub Date : 2019-10-01 DOI: 10.1109/phm-qingdao46334.2019.8942962
Gang Tang, Chaoren Qin, Zhi Xu, Ying Chen
In the prognostic and health management of rotating machinery, the characteristic frequency of early weak fault is usually difficult to be extracted. To overcome this difficulty, this paper presents a weak fault feature enhancement method of acoustic data for rolling bearings based on variational mode decomposition (VMD). Firstly, the acoustic data is decomposed into some band-limited intrinsic mode functions (BLIMF) by the optimized VMD. Then an adaptive signal-to-noise ratio (ASNR) estimation method is proposed to determine the optimal BLIMF. Finally, the fault types of rolling bearings are identified through Hilbert envelope transform. Experimental results show that the presented method can effectively enhance the feature for early weak fault in rolling bearings with acoustic data.
在旋转机械的预后和健康管理中,早期微弱故障的特征频率通常难以提取。为了克服这一困难,本文提出了一种基于变分模态分解(VMD)的滚动轴承声学数据弱故障特征增强方法。首先,利用优化后的VMD将声学数据分解为若干带限内禀模态函数(BLIMF);然后提出了一种自适应信噪比估计方法来确定最优的BLIMF。最后,通过希尔伯特包络变换对滚动轴承的故障类型进行识别。实验结果表明,该方法可以有效地增强基于声学数据的滚动轴承早期弱故障特征。
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引用次数: 0
Study on the Influence of PHM Technology on Aircraft Maintenance Support Mode PHM技术对飞机维修保障模式的影响研究
Pub Date : 2019-10-01 DOI: 10.1109/phm-qingdao46334.2019.8942925
Tao Gao, Pu Chen, Mei Han
Maintenance efficiency is the key to modern high-tech warfare. As the basis of condition-based maintenance, PHM(prognostics and health management) technology greatly improves maintenance efficiency by enabling the system with prediction power. To provide theoretical foundation for new equipment maintenance reform, the impact of PHM technology on maintenance support mode was analyzed from the member-level and the regional-level on aspects of maintenance support system, maintenance support resources, maintenance analysis and decision-making process. It is hoped that the results of the proposed study may contribute to the current reform of support modes for aircraft maintenance.
维修效率是现代高技术战争的关键。PHM(prognostics and health management)技术作为基于状态维护的基础,通过赋予系统预测能力,极大地提高了维护效率。从维修保障体系、维修保障资源、维修分析与决策过程等方面,从成员层面和区域层面分析了PHM技术对新装备维修保障模式的影响,为新装备维修改革提供理论依据。希望所提出的研究结果可以对当前飞机维修支持模式的改革有所贡献。
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引用次数: 1
期刊
2019 Prognostics and System Health Management Conference (PHM-Qingdao)
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