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2023 Prognostics and Health Management Conference (PHM)最新文献

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An improved UNet model based on adaptive activation function and squeeze-and-excitation module for milling tool wear segmentation 基于自适应激活函数和挤压激励模块的铣刀磨损分割改进UNet模型
Pub Date : 2023-05-01 DOI: 10.1109/PHM58589.2023.00057
Canyu Cai, Zhichao You, Changgen Li, Yi Sun, Shichao Li, Hongli Gao
The fine monitoring technology of the milling tool wear condition is a crucial prerequisite to ensure both the processing quality and the smooth progress of the machining process. In order to fulfil this requirement, this paper constructs an improved UNet model to achieve end-to-end high-precision segmentation of milling tool wear area. The model uses Resnet as the feature extraction framework, and introduces an adaptive activation function to prevent information loss and minimize the activation function cost. Meanwhile, the squeeze-and-excitation module is introduced in the front and back ends of the feature extraction framework to enhance the important features and suppress irrelevant features. The accuracy and adapt ability of the proposed model is confirmed through the experiment of accelerating milling cutter life and three different failure phenomena.
铣刀磨损状态的精细监测技术是保证加工质量和加工过程顺利进行的重要前提。为了满足这一要求,本文构建了一种改进的UNet模型,实现了端到端铣刀磨损区域的高精度分割。该模型采用Resnet作为特征提取框架,引入自适应激活函数,防止信息丢失,最小化激活函数代价。同时,在特征提取框架的前后端分别引入挤压激励模块,增强重要特征,抑制无关特征。通过加速铣刀寿命试验和三种不同失效现象,验证了所提模型的准确性和自适应能力。
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引用次数: 0
Bearing Fault Diagnosis Based on Diffusion Model and One-Class Support Vector Machine 基于扩散模型和一类支持向量机的轴承故障诊断
Pub Date : 2023-05-01 DOI: 10.1109/PHM58589.2023.00063
Lijuan Yan, Ziqiang Pu, Zhe Yang, Chuan Li
Fault diagnosis is of great importance for reducing economic losses and ensuring the safety of equipment. As an important part of industrial machine, it is necessary to perform fault diagnosis on bearings. However, in reality, normal data are often more abundant than fault data, making it challenging to recognize faults. To address this issue, the diffusion model with u-net has been introduced, for its excellent feature extraction ability. In this paper, the feature knowledge extracted by diffusion model is sent into one-class support vector machine (OCSVM) for anomaly detection instead of using raw data. Firstly, train the diffusion model with normal data, and then take out the trained encoder in u-net. Next, input test data which includes both normal data and abnormal data into the trained encoder to extract feature knowledge. Finally, train OCSVM with normal data and then send the extracted feature knowledge into trained OCSVM for detection. Compared to directly using raw data for fault diagnosis, the proposed method achieves superior accuracy.
故障诊断对减少经济损失、保证设备安全具有重要意义。轴承作为工业机械的重要组成部分,对其进行故障诊断是十分必要的。然而,在现实中,正常数据往往比故障数据更丰富,这给故障识别带来了挑战。为了解决这一问题,引入了具有u-net的扩散模型,该模型具有出色的特征提取能力。本文将扩散模型提取的特征知识发送到一类支持向量机(OCSVM)中进行异常检测,而不是使用原始数据。首先用正常数据训练扩散模型,然后在u-net中取出训练好的编码器。接下来,将测试数据输入到训练好的编码器中,包括正常数据和异常数据,提取特征知识。最后用正常数据训练OCSVM,然后将提取的特征知识送入训练好的OCSVM进行检测。与直接使用原始数据进行故障诊断相比,该方法具有更高的诊断精度。
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引用次数: 0
RUL Estimation for Power Electronic Devices Based on LESIT Equation 基于LESIT方程的电力电子器件规则估计
Pub Date : 2023-05-01 DOI: 10.1109/PHM58589.2023.00017
Zhonghai Lu, R. Shi, A. Otto, J. Albrecht
The LESIT equation is a well-known model to estimate the lifetime of power electronic devices. However, the equation is a static lifetime model that can estimate the total lifetime but not the dynamic lifetime over time and the Remaining Useful Lifetime (RUL), because the equation is not related to time or cycle count. In the paper, we first introduce the concept of dynamic lifetime, i.e., lifetime over time, and include time into the equation to allow it to calculate dynamic lifetime, and then propose a simple equation to conduct the RUL estimation assuming linear damage accumulation. In our experiments using aggregated aging tests, we show that the proposed RUL estimation method can fully capture the general linear decreasing trend of RUL, and in most cases, it gives very accurate estimates, where the deviation depends on the accuracy of the original LESIT estimation.
LESIT方程是估计电力电子器件寿命的一个众所周知的模型。然而,该方程是一个静态生命周期模型,可以估计总生命周期,但不能估计随时间变化的动态生命周期和剩余有用生命周期(RUL),因为该方程与时间或周期计数无关。本文首先引入动态寿命的概念,即随时间变化的寿命,并将时间纳入方程,使其能够计算动态寿命,然后提出一个简单的方程,在损伤线性累积的情况下进行RUL估计。在我们使用聚合老化测试的实验中,我们表明所提出的RUL估计方法可以完全捕获RUL的一般线性下降趋势,并且在大多数情况下,它给出了非常准确的估计,其中偏差取决于原始LESIT估计的精度。
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引用次数: 0
Analysis of Common Fault Diagnosis Methods for Aeroengine 航空发动机常见故障诊断方法分析
Pub Date : 2023-05-01 DOI: 10.1109/PHM58589.2023.00035
Yingshun Li, Chengsong Li, Fansen Kong, Shengchong Cao
As one of the main components of aviation equipment, aviation engine is the power source of aviation equipment. If the aeroengine fails, the performance and safety of aviation equipment will be greatly affected. Due to the change of its working state at any time, and the influence of high temperature, large stress, strong vibration, high speed and other related factors, various fault problems may occur. If the situation is serious, it will cause catastrophic flight accidents. Taking aeroengine fault diagnosis technology as the main research object, this paper analyzes the commonly used diagnosis technology and explores the development of diagnosis technology.
航空发动机作为航空设备的主要部件之一,是航空设备的动力源。如果航空发动机发生故障,将极大地影响航空设备的性能和安全。由于其工作状态随时变化,再加上高温、大应力、强振动、高速等相关因素的影响,可能会出现各种故障问题。如果情况严重,将会造成灾难性的飞行事故。本文以航空发动机故障诊断技术为主要研究对象,分析了常用的诊断技术,探讨了诊断技术的发展方向。
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引用次数: 0
Design and implementation of a panoramic training platform for distribution automation based on the combination of virtualness and reality 虚拟与现实相结合的配电自动化全景培训平台的设计与实现
Pub Date : 2023-05-01 DOI: 10.1109/PHM58589.2023.00066
Xiaoqing Tang, Chuan Xi, Lan Wang
In order to deal with the problems of continuous promotion of distribution automation and insufficient technical level of distribution operation and maintenance personnel, a panoramic training platform of distribution automation is designed based on the virtualness and reality. With the help of the three-dimensional real image model, the platform simulates the real distribution scene by virtual simulation and can be connected to the actual pole top switch, Ring Main Unit for more realistic display and training. The platform simulates the master station, secondary equipment, and primary equipment of distribution automation, which can provide comprehensive professional knowledge training for distribution personnel. In addition, the proposed design method is verified by building the actual panoramic training platform of distribution automation, which proves the feasibility of the system and the advantages of low construction cost.
为了解决配电自动化不断推进,配电运维人员技术水平不足的问题,基于虚拟与现实相结合,设计了配电自动化全景培训平台。平台借助三维实像模型,通过虚拟仿真模拟真实配电场景,并可与实际的电线杆顶开关、环形主机组相连接,进行更真实的显示和训练。该平台对配电自动化主站、二次设备、一次设备进行仿真,可以为配电人员提供全面的专业知识培训。此外,通过搭建实际的配电自动化全景培训平台对所提出的设计方法进行了验证,验证了系统的可行性和低建设成本的优势。
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引用次数: 0
Thermal fatigue reliability analysis of charging module based on Coffin-Manson model and Monte Carlo 基于Coffin-Manson模型和Monte Carlo的装药模块热疲劳可靠性分析
Pub Date : 2023-05-01 DOI: 10.1109/PHM58589.2023.00018
Wang Ke, Pang Songling, Zhu Wangcheng, Sang Lin, Dong Chen
In recent years, the charging equipment of new energy vehicles has developed rapidly. The failure of charging equipment can not only affect the customer experience, but also consume money and power. The data show that temperature is the influence of electronic products accounted for more than half of the factors. To solve this problem, based on FMMEA method, this paper analyzes the system principle of charging equipment, the thermal fatigue failure mechanism of charging module and the corresponding Coffin-Manson(C-M) failure physical model. According to the actual working condition of the charging equipment, the thermal stress simulation is carried out based on ANSYS Icepak. Combined with the simulation results and the CM failure physical model, the thermal fatigue failure analysis of the charging equipment was carried out. Finally, the failure analysis results are fitted to a function based on Weibull distribution and maximum likelihood estimation. The thermal reliability of the charging module was analyzed and evaluated based on the fitted function. The proposed method supports reduction of the operation and maintenance cost of the charging equipment and improving the reliability of the charging equipment.
近年来,新能源汽车充电设备发展迅速。充电设备的故障不仅会影响客户体验,还会消耗金钱和电力。数据显示,温度是影响电子产品的因素,占了一半以上。针对这一问题,本文基于FMMEA方法,分析了装药设备的系统原理、装药模块的热疲劳失效机理以及相应的Coffin-Manson(C-M)失效物理模型。根据装药设备的实际工作情况,基于ANSYS Icepak软件进行了热应力仿真。结合仿真结果和CM失效物理模型,对装药设备进行了热疲劳失效分析。最后,将失效分析结果拟合到基于威布尔分布和极大似然估计的函数中。利用拟合函数对充电模块的热可靠性进行了分析和评价。该方法有利于降低充电设备的运行维护成本,提高充电设备的可靠性。
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引用次数: 0
Prediction of High-speed Train Vibratory Stability Via Pseudo Excitation Method 基于伪激励的高速列车振动稳定性预测
Pub Date : 2023-05-01 DOI: 10.1109/PHM58589.2023.00067
Zhaozhi Wu, N. Zhang, Jinbao Yao, V. Poliakov
With the high-speed railway’s increasing train speeds, the frequency of track irregularity excitation is heightened. This adversely affects the train stability, which is a top priority for providing a high-quality ride experience. Additionally, uncertainty regarding train stability is attributed to the stochastic feature of track irregularity. Therefore, it is essential to use the stochastic method to analyze the train stability and its influential factors. This analysis will theoretically support the stabilization of the train. To achieve this, the train motion equation is formulated based on rigid body dynamics. The precise Sperling index can be derived by Pseudo excitation method. The empirical monitoring is conducted to validate the predicted result. Pseudo excitation is proved to be feasible. Routine maintenance of railway and suspension system and keeping a optimal speed interval will stabilize the train car body.
随着高速铁路列车运行速度的不断提高,轨道不平顺激励的频率也随之增加。这对列车的稳定性产生了不利影响,而稳定性是提供高质量乘坐体验的重中之重。此外,列车稳定性的不确定性是由于轨道不规则性的随机性。因此,采用随机方法分析列车稳定性及其影响因素是十分必要的。这一分析将在理论上支持列车的稳定。为此,建立了基于刚体动力学的列车运动方程。用伪激励法可以得到精确的斯珀林指数。为验证预测结果,进行了实证监测。证明了伪激励是可行的。对铁路和悬挂系统进行日常维护,保持最佳速度区间,使列车车体稳定。
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引用次数: 0
Summarization of Fire Control System Fault Detection and Health Prediction Methods 消防系统故障检测与健康预测方法综述
Pub Date : 2023-05-01 DOI: 10.1109/PHM58589.2023.00048
Yingshun Li, Shiming Liu, A. Yu, De-biao Wang
In recent years, under the background of the times, countries have continuously improved their national defense construction and paid more and more attention to armored vehicles such as tanks, in which the fire control system controlling tank weapons is particularly important. The performance of the fire control system will directly affect the tank’s land combat capability. Due to the complex internal structure of the fire control system, it is easy to fail in combat. Once the failure occurs, it may cause combat failure. For the health status of the fire control system, if it can be predicted in advance and fault detection and processing can greatly improve the battlefield survival and combat capability. The technologies used in modern fire control systems are more or less similar. This paper will summarize the fault diagnosis and health prediction methods of fire control systems.
近年来,在时代背景下,各国不断提高国防建设水平,对坦克等装甲车辆越来越重视,其中控制坦克武器的火控系统尤为重要。火控系统的性能将直接影响坦克的地面作战能力。由于火控系统内部结构复杂,在作战中容易出现故障。一旦发生故障,可能会导致战斗失败。对于火控系统的健康状态,如果能够提前预测并进行故障检测和处理,可以大大提高战场生存能力和作战能力。在现代火控系统中使用的技术或多或少是相似的。本文综述了消防系统的故障诊断和健康预测方法。
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引用次数: 0
MOA analysis of large hydropower station 大型水电站MOA分析
Pub Date : 2023-05-01 DOI: 10.1109/PHM58589.2023.00040
Dongyi Li, Z. Dai, Peishuo Guan, Zhaojun Lu
Zinc oxide arrester, aka metal oxide arrester (MOA), is widely used to protect electrical equipment in large hydroelectric power stations. This article takes the Yangfanggou Hydroelectric Power Station as an example to expound on the mathematical model of the zinc oxide arrester at the station. A simulation circuit is then established to simulate and analyze the leakage current of the zinc oxide arrester under lightning strike and normal voltage conditions. By analyzing and comparing the results, the relationship between the leakage current and voltage harmonic and phase is obtained, providing guidance and assistance in judging the voltage quality of the Yangfanggou Hydroelectric Power Station.
氧化锌避雷器,又称金属氧化物避雷器(MOA),广泛用于大型水电站的电气设备保护。本文以阳方沟水电站为例,阐述了该站氧化锌避雷器的数学模型。建立了仿真电路,对雷击和正常电压条件下氧化锌避雷器的漏电流进行了仿真分析。通过对结果的分析比较,得出了漏电流与电压谐波、相位的关系,为判断阳方沟水电站的电压质量提供了指导和帮助。
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引用次数: 0
Monocular vision-based 3D reconstruction of aero-engine blade damage 基于单目视觉的航空发动机叶片损伤三维重建
Pub Date : 2023-05-01 DOI: 10.1109/PHM58589.2023.00058
Jingxuan Cheng, Hongfu Zuo, Hang Fei, Yue Su, Zuocheng Zhou, Zhexun Yuan
Aero-engine blades are one of the most important components of an aero-engine and reducing the cost of repair and maintenance of aero-engine blades is of great economic importance to the aviation industry. Borescope Technology is the most used NDT method in aero-engine overhaul, but it relies too much on the experience of maintenance personnel. We propose to combine 3D reconstruction with Borescope Technology, based on the borescope image, using monocular stereo vision principle, using SIFT algorithm for feature point detection and feature point matching by improved FLANN algorithm, using incremental SFM algorithm for sparse reconstruction of the damaged blade sequence, using PMVS method for dense reconstruction, Poisson reconstruction to enhance the reconstruction effect, and finally get The three-dimensional reconstruction model of blade damage, accurate detection of blade damage, the reconstructed three-dimensional model is the basis of aero-engine overhaul intelligence.
航空发动机叶片是航空发动机最重要的部件之一,降低航空发动机叶片的维修保养成本对航空工业具有重要的经济意义。内窥镜技术是航空发动机大修中应用最多的无损检测方法,但对维修人员的经验依赖较大。我们提出将三维重建与Borescope技术相结合,以Borescope图像为基础,利用单眼立体视觉原理,采用SIFT算法进行特征点检测,采用改进的FLANN算法进行特征点匹配,采用增量SFM算法对受损叶片序列进行稀疏重建,采用PMVS方法进行密集重建,泊松重建增强重建效果。最后得到叶片损伤的三维重建模型,对叶片损伤进行准确的检测,重建的三维模型是航空发动机大修智能化的基础。
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引用次数: 0
期刊
2023 Prognostics and Health Management Conference (PHM)
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