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Prognostics and System Health Management Conference (PHM-Qingdao)

作者： Yanfang Wang Ying Chen Science and Technology on Reliability and Environmental Engineering Laboratory Beihang University Beijing China

ISBN: (数字)9798350354010

ISBN: (纸本)9798350354027

Enhancing the availability and safety of electronic systems necessitates a comprehensive investigation into their reliability. This study proposes an electronic system life prediction algorithm based on the physics of failure. For commonly used components, both failure physical models and degradation physical models are presented. An improved binary decision diagram (BDD) is constructed, accompanied by the development of a model-solving algorithm. Ultimately, the proposed methodology is applied to the driver circuit board of an electronic controller as a specific case study, thereby demonstrating its effectiveness and validity.

关键词： Degradation Accuracy Prediction algorithms Safety Logic Integrated circuit modeling Prognostics and health management Integrated circuit reliability Physics Driver circuits

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Corrosion evolution and behaviour of Al-2.1Mg-1.6Si alloy in chloride media

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Rare Metals 2021年第4期40卷 908-919页

作者： Ya-Ya Zheng Bing-Hui Luo Chuan He Yang Gao Zhen-Hai Bai College of Materials Science and Engineering Central South UniversityChangsha 410083China Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle Changsha University of Science and TechnologyChangsha 410114China

Owing to the importance of finding better methods and technologies for protecting against corrosion of aluminium alloys,research into the electrochemical characteristics of the corrosion is an ongoing *** this paper,the corrosion behaviour of Al-Mg-Si alloys in 3.5 wt% NaCl solution was investigated using multiple methods,including scanning electron microscopy(SEM),transmission electron microscopy(TEM),potentiodynamic polarisation measurement and electrochemical impedance spectroscopy(EIS).The results suggest that corrosion begins with dealloying of Mg,followed by conversion of MgSi particles into Al-Fe-Mn-Si *** corrosion rate increased until it reached a peak and then *** increase in the corrosion rate may be attributed to an increased electrochemical driving force,which is produced by anodic dissolution between the matrix and residual MgSi ***,the thin re-deposited layer of inert elements also plays an important role in accelerating the anodic process of the corrosion *** passivated corrosion pit and narrowed intergranular corrosion(IGC)pathway cause the area of active dissolution to decrease,thus reducing the corrosion rate.

关键词： Al-Mg-Si alloys Corrosion behaviour Electrochemical Corrosion rate IGC corrosion pathway

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reliability analysis of k-out-of-n system with load-sharing and failure propagation effect

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Journal of Systems engineering and Electronics 2021年第5期32卷 1221-1231页

作者： CHEN Ying MA Qichao WANG Ze LI Yingyi Science and Technology on Reliability and Environmental Engineering Laboratory Beihang UniversityBeijing 100191China Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621999China

In complex systems,functional dependency and physical dependency may have a coupling *** this paper,the reliability of a k-out-of-n system is analyzed considering load-sharing effect and failure mechanism(FM)*** types of FMs are considered and an accumulative damage model is proposed to illustrate the system behavior of the k-out-of-n system and the coupling effect between load-sharing effect and FM propagation effect.A combinational algorithm based on Binary decision diagram(BDD)and Monte-Carlo simulation is presented to evaluate the complex system behavior and reliability of the k-out-of-n system.A current stabilizing system that consists of a 3-out-of-6 subsystem with FM propagation effect is presented as a case to illustrate the complex behavior and to verify the applicability of the proposed *** to the coupling effect change,the main mechanism and failure mode will be changed,and the system lifetime is *** are analyzed and results show that different sensitivity factors of three different FMs lead to the change of the development rate,thus changing the failure *** the coupling effect may lead to an incomplete and ineffective measuring and monitoring *** strategies must be adopted to make the FM propagation insensitive to load-sharing effect.

关键词： k-out-of-n system load-sharing effect failure mechanism propagation damage factor model combinational algorithm

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A novel learning approach to MIMO networked control systems with uncertain parameters 14

A novel learning approach to MIMO networked control systems ...

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14th IEEE Global reliability and Prognostics and Health Management Conference, PHM-Hangzhou 2023

作者： Jia, Hanguang School of Automation Science and Engineering South China University of Technology National Key Laboratory of Science and Technology on Reliability Physics and Application of Electronic Component The Fifth Electronics Research Institute of the Ministry of Industry and Information Technology Guangzhou China

ISBN: (纸本)9798350301359

This paper proposes a new learning approach to solve control design problems involving uncertain parameters in MEMO networked control systems. This approach combines neural network technology with control system modeling in real-time through learning and adaptation of data, thereby achieving stability and optimization of network-based control systems. The authors first establish a network-based control model and then improve it by replacing the linear parameters with nonlinear ones. To ensure real-time and stable communication between devices, this method also uses adaptive iterative learning control (AILC) technology and error feedback control technology. A network-based control system is used to verify the effectiveness of the proposed approach. The results show that this approach is effective in achieving sufficient communication between devices, adapting to uncertain parameters, and improving control performance. © 2023 IEEE.

关键词： AILC communication error feedback control MIMO networked control systems uncertain parameters

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Flash sintering of high-purity alumina at room temperature

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Journal of Advanced Ceramics 2023年第12期12卷 2382-2388页

作者： Yueji Li Qingguo Chi Ziyang Yan Nianping Yan Jinling Liu Rongxia Huang Xilin Wang Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Key Laboratory of Engineering Dielectrics and Its Application Ministry of EducationHarbin University of Science and TechnologySchool of Electrical and Electronic EngineeringHarbin University of Science and TechnologyHarbin 150080China State Grid Tianjin Chengxi Electric Power Supply Company Tianjin 300113China State Grade Jiangxi Electric Power Research Institute Nanchang 330096China School of Mechanics and Aerospace Engineering Southwest Jiaotong University Chengdu 611756China School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006China

For the first time,the flash sintering(FS)of high-purity alumina at room temperature,which was previously considered unachievable due to its low electrical conductivity,was conducted *** electrical arc originating from surface flashover was harnessed to induce FS at room temperature and low air *** successful FS of high-purity alumina was realized at 60 kPa under the arc constraint,resulting in a notable relative density of the alumina sample of 98.7%.The electric–thermal coupling between the arc and high-purity alumina sample during the arc-induced FS process was analyzed via the finite element simulation *** results revealed the thermal and electrical effects of the arc on the sample,which ultimately enhance the electrical conductivity of the alumina *** formation of a conductive channel on the sample surface,a result of increased electrical conductivity,was the pivotal factor in achieving FS in high-purity alumina at room *** arc constraint technique can be applied to numerous materials,such as ionic conductors,semiconductors,and even insulators,under room-temperature and low-air-pressure conditions.

关键词： flash sintering(FS) high-purity alumina arc constraint electric-thermal coupling simulation

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The Law of Secondary Electron Multiplication of Aluminum under Different Frequency Microwaves 9

The Law of Secondary Electron Multiplication of Aluminum und...

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9th IEEE International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, MAPE 2022

作者： Shang, Shengfei Yang, Xiaoning Yang, Yong Bi, Yanqiang Wu, Nankai Li, Xiyuan Beijing Institute of Spacecraft Environment Engineering National Key Laboratory of Science and Technology on Reliability and Environmental Engineering Beijing China

ISBN: (数字)9781665427753

ISBN: (纸本)9781665427753

In this paper, the discharge phenomena of aluminum materials under the action of strong electromagnetic waves are investigated. The electron multiplication phenomenon of aluminum surface under different amplitude of microwave at 1GHz-300GHz was calculated using 1D3V simulation framework. It shows that the easiest discharge interval of aluminum is about 0.05MV/m-8.5MV/m at 1GHz and about 20MV/m-1700MV/m at 300GHz, and the easiest discharge interval increases with the frequency and follows nearly a linear power law. © 2022 IEEE.

关键词： Aluminum

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A K/Ka-Band Frequency Reconfigurable GaN LNA for Multi-Band Communication Applications

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Chinese Journal of Electronics 2025年第3期34卷 739-748页

作者： Guangdong Provincial Key Laboratory of Millimeter-Wave and Terahertz School of Electronic and Information Engineering South China University of Technology Guangzhou 510641 China Guangdong-Hong Kong-Macao Joint Laboratory for Millimeter-Wave and Terahertz School of Electronic and Information Engineering South China University of Technology Guangzhou 510641 China Department of National Key Laboratory of Science and Technology on Reliability Physics and Application of Electronic Component China Electronic Product Reliability and Environmental Testing Research Institute Guangzhou 510610 China

A frequency reconfigurable low noise amplifier (LNA) in a 0.15-μm gallium nitride (GaN) high-electron-mobility-transistor process is presented. The concept of frequency reconfiguration utilizing a switch-based reconfigurable resonator (SBRR) to adjust the resonant frequency and introduce a transmission zero in the lower out-of-band region is discussed. Additionally, a K/Ka-band frequency-reconfigurable LNA that incorporates the SBRR is designed and fabricated for validation. The proposed LNA features a small-signal gain of 13.9/8.9 dB and a noise figure of 2.4/3.2 dB at 21/30 GHz. The measured output power 1-dB compression point (OP1-dB) is 5.5/6.7 dBm at 21/30 GHz, respectively. The chip size is 1.5 × 1.75 mm2. The reconfigurable GaN LNA is attractive for future multi-band communication systems compatible for multiple standards.

关键词： Gallium nitride (GaN) Low noise amplifier (LNA) Monolithic microwave integrated circuit Reconfigurable Multi-band

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reliability modeling of the bivariate deteriorating product with both monotonic and non-monotonic degradation paths

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Journal of Systems engineering and Electronics 2021年第4期32卷 971-983页

作者： SUN Fuqiang GUO Hongxuan LIU Jingcheng School of Reliability and Systems Engineering Beihang UniversityBeijing 100191China Science and Technology on Reliability and Environmental Engineering Laboratory Beihang UniversityBeijing 100191China Wuhan Maritime Communication Research Institute Wuhan 430079China

Fiber optical gyroscope(FOG)is a highly reliable navigation element,and the degradation trajectories of its two accuracy indexes are monotonic and non-monotonic *** this paper,a flexible accelerated degradation testing(ADT)model is used for analyzing the bivariate dependent degradation process of *** time-varying copulas are employed to consider the dynamic dependency structure between two marginal degradation processes as the Wiener process and the inverse Gaussian *** statistical inference is implemented by utilizing an inference function for the margins(IFM)*** is demonstrated that the proposed method is powerful in modeling the joint distribution with various margins.

关键词： fiber optical gyroscope bivariate accelerated degradation testing Wiener process inverse Gaussian process time-varying copulas dependence

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Belief reliability modeling and analysis for planetary reducer considering multi-source uncertainties and wear

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Journal of Systems engineering and Electronics 2021年第5期32卷 1246-1262页

作者： LI Yun JIANG Kaige ZENG Ting CHEN Wenbin LI Xiaoyang LI Deyong ZHANG Zhiqiang Beijing Spacecraft Manufacturing Co. LtdChina Academy of Space TechnologyBeijing 100094China School of Reliability and Systems Engineering Beihang UniversityBeijing 100191China Science and Technology on Reliability and Environmental Engineering Laboratory Beijing 100191China

The planetary reducer is a common type of transmission mechanism,which can provide high transmission accuracy and has been widely used,and it is usually required with high reliability of transmission characteristics in *** the manufacturing and usage stages of planetary reducers,uncertainties are ubiquitous and wear is inevitable,which affect the transmission characteristics and the reliability of planetary *** this paper,belief reliability modeling and analysis considering multi-uncertainties and wear are proposed for planetary ***,based on the functional principle and the influence of wear,the performance margin degradation model is established using the hysteresis error as the key performance parameter,where the degradation is mainly caused by the accumulated *** that,multi-source uncertainties are analyzed and quantified separately,including manufacturing errors,uncertainties in operational and environmental conditions,and uncertainties in performance ***,the belief reliability model is established based on the performance margin degradation model.A case study of a planetary reducer is applied and the reliability sensitivity analysis is implemented to show the practicability of the proposed *** results show that the proposed method can provide some suggestions to the design and manufacturing phases of the planetary reducer.

关键词： belief reliability planetary reducer performance margin wear multi-source uncertainty

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CHARACTERISATION OF DAMAGE EVOLUTION ON TEXTILE CERAMIC MATRIX COMPOSITE BY IN-SITU X-RAY COMPUTED TOMOGRAPHY TEST 23

CHARACTERISATION OF DAMAGE EVOLUTION ON TEXTILE CERAMIC MATR...

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23rd International Conference on Composite Materials, ICCM 2023

作者： Guo, Weiyu Zhang, Yi Zhang, Daxu Feng, Yuqi Wang, Long Du, Yonglong School of Naval Architecture Ocean & Civil Engineering Shanghai Jiao Tong University China Science and Technology Thermostructural Composite Materials Laboratory Northwestern Polytechnical University Xi'an710072 China Science and Technology on Reliability and Environment Engineering Laboratory Beijing Institute of Structure and Environment Engineering Beijing100076 China

This paper studied the plain weave textile ceramic matrix composite' meso-structure and damage evolution with the aid of an in-situ X-CT test system. A deep learning-based image segmentation approach was applied to characterise the material's constituents, and crack initiation and propagation. It was found that the volume fractions of the carbon fibre bundle, silicon carbide matrix and voids outside the bundle were 61.3%, 27.3% and 11.4%, respectively. The volume fraction of cracks of the Cf/SiC composite was approximately 0.05% when it approached to failure. The cracks tended to initiate near the voids and in the matrix rich-region and propagated rapidly during high-level loadings. © 2023 International Committee on Composite Materials. All rights reserved.

关键词： Volume fraction

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