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Annealed microstructure dependent corrosion behavior of Ti-6Al-3Nb-2Zr-1Mo alloy

Journal of Materials Science & technology 2021年第3期62卷 234-248页

作者： Baoxian Su Liangshun Luo Binbin Wang Yanqing Su Liang Wang Robert O.Ritchie Enyu Guo Ting Li Huimin Yang Haiguang Huang Jingjie Guo Hengzhi Fu National Key Laboratory for Precision Hot Processing of Metals School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Department of Materials Science and Engineering University of CaliforniaBerkeleyCL 94720USA Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province) School of Materials Science&EngineeringDalian University of TechnologyDalian116024China Department of Materials Science and Engineering Dalian Maritime UniversityDalian 116026China School of Materials and Chemical Engineering Heilongjiang Institute of TechnologyHarbin 150050China School of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China Yunnan Titanium Industry Co. Ltd.Chuxiong 651209China

Corrosion resistance of titanium(Ti)alloys is closely connected with their microstructure which can be adjusted and controlled via different annealing ***,we systematically investigate the specific effects of annealing on the corrosion performance of Ti-6 Al-3 Nb-2 Zr-1 Mo(Ti80)alloy in 3.5 wt.%NaCl and 5 M HCl solutions,respectively,based on open circuit potential(OCP),potentiodynamic polarization,electrochemical impedance spectroscopy(EIS),static immersion tests and surface *** indicate that increasing annealing tempe rature endows Ti80 alloy with a higher volume fraction ofβphase and finerαphase,which in turn improves its corrosion *** characterization demonstrates thatβphase is more resistant to corrosion thanαphase owing to a higher content of Nb,Mo,and Zr in the former;additionally,the decreased thickness of a phase alleviates segregation of elements to further restrain the micro-galvanic couple effects betweenαandβ***,the influential mechanisms of environmental conditions on corrosion of Ti80 alloy are discussed in *** the formation of a highly compact and stable oxide film on surface,annealed Ti80 alloys exhibit a low corrosion current density(10^(-6)A/cm^(2))and high polarization impedance(10^(6)Ω·cm^(2))in 3.5 wt.%NaCl ***,they suffer severe corrosion in 5 M HCl solution,resulting from the breakdown of native oxide films(the conversion of TiO_(2)to aqueous Ti^(3+)),active dissolution of substrate Ti to aqueous Ti^(3+)and existence of micro-galvanic couple *** findings could provide new insights to designing Ti alloys with high-corrosion resistance through microstructural optimization.

关键词： Titanium alloys Annealing Electrochemical techniques Weight loss Corrosion behavior

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H-/L∞ UIO-Based Robust Fault Diagnosis Design in Finite Frequency Domain for Discrete-Time Systems

H-/L∞ UIO-Based Robust Fault Diagnosis Design in Finite Fre...

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第41届中国控制会议

作者： Sheng Gao Jian Wang Zhihui Lu Guangfu Ma Yanning Guo Department of Control Science and Engineering Harbin Institute of Technology Beijing Institute of Remote Sensing Equipment Aerospace System Engineering Shanghai

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

This study investigates the problem of robust fault diagnosis for discrete-time systems subjected to actuator faults and unknown input disturbances.A novel H-/L unknown input observer（UIO） based on the generalized Kalman-Yakubovich-Popov（GKYP） lemma is presented by decoupling the partial unknown input disturbances and attenuating the unknown input disturbances that cannot be ***,the H-performance index in the finite frequency domain is used to measure the fault sensitivity and the L performance index is used to reduce the influence of unknown input disturbances on fault diagnosis results and ensure the robustness performance.A residual evaluation function and a time-varying threshold are presented based on the L performance *** addition,sufficient conditions for designing the H/L UIO are proposed and transformed into linear matrix inequalities（LMIs） that can be easily ***,simulations of a simple discrete-time system are used to validate the effectiveness of the developed H/L UIO.

关键词： Unknown input observer(UIO) Fault diagnosis Discrete-time System Finite frequency domain Linear matrix inequality(LMI)

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Fuzzy-based filtering of autonomous vehicle system via memory-based event-triggered mechanism

Fuzzy-based filtering of autonomous vehicle system via memor...

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Fully Actuated System theory and Applications (CFASTA), Conference on

作者： Yaxin Gu Weiyi Zhao Xinxin Liu Xiaojie Su Jianxing Liu Department of Automation Nanjing University of Information Science and Technology Nanjing P. R. China Department of Automation Chongqing University Chongqing P. R. China Department of Control Science and Engineering Harbin Institute of Technology Harbin P. R. China

ISBN: (数字)9798350373691

ISBN: (纸本)9798350373707

The fuzzy reduced-based filtering problem within autonomous vehicles featuring dynamic positioning systems is employed via an enhanced event-triggered scheme. A reduced-based filtering approach is proposed capable of approximating the original high-order model with a given system performance level. The stability analysis is solved by employing the memorybased event-triggered scheme. Thus the usage of network transmission computational resources is saved effectively.

关键词： Filtering Computational modeling System performance Bandwidth Stability analysis Vehicle dynamics Autonomous vehicles

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A Trusted Lesion-assessment Network for Interpretable Diagnosis of Coronary Artery Disease in Coronary CT Angiography 39

A Trusted Lesion-assessment Network for Interpretable Diagno...

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39th Annual AAAI Conference on Artificial Intelligence, AAAI 2025

作者： Ma, Xinghua Fang, Xinyan Zou, Mingye Luo, Gongning Wang, Wei Wang, Kuanquan Qiu, Zhaowen Gao, Xin Li, Shuo Faculty of Computing Harbin Institute of Technology Harbin China Computational Bioscience Research Center King Abdullah University of Science and Technology Thuwal Saudi Arabia Faculty of Computing Harbin Institute of Technology Shenzhen China College of Computer and Control Engineering Northeast Forestry University Harbin China Department of Computer and Data Science Case Western Reserve University Cleveland United States Department of Biomedical Engineering Case Western Reserve University Cleveland United States

ISBN: (纸本)157735897X

Coronary Artery Disease (CAD) poses a significant threat to cardiovascular patients worldwide, underscoring the critical importance of automated CAD diagnostic technologies in clinical practice. Previous technologies for lesion assessment in Coronary CT Angiography (CCTA) images have been insufficient in terms of interpretability, resulting in solutions that lack clinical reliability in both network architecture and prediction outcomes, even when diagnoses are accurate. To address the limitation of interpretability, we introduce the Trusted Lesion-Assessment Network (TLA-Net), which provides a clinically reliable solution for multi-view CAD diagnosis: (1) The causality-informed evidence collection constructs a causal graph for the diagnostic process and implements causal interventions, preventing confounders’ interference and enhancing the transparency of the network architecture. (2) The clinically-aligned uncertainty integration hierarchically combines Dirichlet distributions from various views based on clinical priors, offering confidence coefficients for prediction outcomes that align with physicians’ image analysis procedures. Experimental results on a dataset of 2,618 lesions demonstrate that TLA-Net, supported by its interpretable methodological design, exhibits superior performance with outstanding generalization, domain adaptability, and robustness. Copyright © 2025, Association for the Advancement of Artificial Intelligence (***). All rights reserved.

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Flow and Heat Transfer Analysis of the Microfluidic Thermal Camouflage Film Based on Bionic Structure

SSRN

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SSRN 2022年

作者： Li, Lujia Chen, Changbing An, Miao Liu, Guoquan Li, Songjing Department of Fluid Control and Automation Harbin Institute of Technology Harbin150001 China Institute of Defense Engineering AMS PLA Luoyang471300 China

With the rapid advancement of infrared (IR) detection techniques, the importance of thermal camouflage technology has become increasingly prominent. Inspired by spider webs and honeycombs, microfluidic thermal camouflage films based on two bionic structures are proposed to IR cloak targets by circulating liquid in the film. The film displays an adaptive thermal camouflage effect by automatically adjusting the liquid temperature. To compare the thermal camouflage performance of two bionic structures, experimental results and flow heat transfer mechanisms are analyzed. The testing system is developed to explore the flow and heat transfer characteristics of the films. The comparison reveals that the honeycomb cell film is suitable for thermal camouflage. Considering the influence of the liquid low-velocity stagnation zone on the camouflage performance, rounded corners of the honeycomb cell are designed to improve the fluid flow properties, and the relationship between the corner radius and the heat transfer characteristics is further investigated. Finally, the honeycomb cell film's parameters are optimized by orthogonal tests, and the optimal solution enhances the thermal camouflage performance. The results show that the film has a well infrared stealth effect, which is expected to motivate the further application of the bionic structures in the military field. © 2022, The Authors. All rights reserved.

关键词： Heat transfer

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A Multi-Layer Long Short-Term Memory Neural Network on Battery State-of-Health Estimation with Transfer Learning

A Multi-Layer Long Short-Term Memory Neural Network on Batte...

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IEEE International Conference on Industrial Electronics for Sustainable Energy Systems (IESES)

作者： Jilun Tian Jiusi Zhang Yuchen Jiang Hao Luo Congsheng Huang Mo-yuen Chow Department of Control Science and Engineering Harbin Institute of Technology Harbin China Department of Electrical Engineering National Taipei University of Technology Taipei Taiwan R.O.C. Department of Electrical and Computer Engineering North Carolina State University Raleigh NC U.S.A.

Due to the important part of batteries in industrial systems, its safety analysis has causes widespread attention from researchers, and its effective maintenance decision-making is needed. Data-driven state-of-health (SOH) estimation can provide useful information by monitoring historical data during the aging process, but it can be failed in the cross-domain scenarios due to the different data distributions. To tackle this issue, we propose a long short-term memory (LSTM) neural network with an additional fully connected dense as a basic predictor, and apply the pretrain and fine-tuning training algorithm to realize the high-performance prediction. By validated in two real-world datasets, we find that blindly expanding the training set may have a negative impact on model accuracy, and the proposed TL-LSTM can achieve a great performance under the cross-domain tasks.

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Three-dimensional finite-time cooperative guidance for multiple missiles without radial velocity measurements

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Chinese Journal of Aeronautics 2019年第5期32卷 1294-1304页

作者： Teng LYU Chuanjiang LI Yanning GUO Guangfu MA Department of Control Science and Engineering Harbin Institute of Technology

In order to simultaneously attack a target with impact angle constraint in threedimensional(3-D) space, a novel distributed cooperative guidance law for multiple missiles under directed communication topologies is proposed without radial velocity measurements. First, based on missiles-target 3-D relative motion equations, the multiple missiles cooperative guidance model with impact angle constraint is constructed. Then, in Line-of-Sight(LOS) direction, based on multiagent system cooperative control theory, one guidance law with directed topologies is designed with strict proof, which can guarantee finite time consensus of multiple missiles' impact times. Next, in elevation direction and azimuth direction of LOS, based on homogeneous system stability theory and integral sliding mode control theory, two guidance laws are proposed respectively with strict proof, which can guarantee LOS angles converge to desired values and LOS angular rates converge to zero in finite time. Finally, the effectiveness of the designed cooperative guidance law is demonstrated through simulation results.

关键词： 3-D cooperative guidance Directed communication topologies Finite time Impact angle constraint Radial velocity measurements

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A Profit-Sharing Mechanism for Coordinated Power-Traffic System

arXiv

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arXiv 2025年

作者： Sima, Tianyu Yan, Mingyu Wen, Jianfeng Luo, Wensheng Malinowski, Mariusz State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China Department of Electrical Engineering and Electronics University of Liverpool LiverpoolL69 3GJ United Kingdom School of Electrical Engineering and Automation Harbin Institute of Technology Harbin150001 China Institute of Control and Industrial Electronics Warsaw University of Technology Warsaw Poland

During the scheduling process, the traffic network operator (TNO) and the distribution network operator (DNO) act non-cooperatively. Under the TNO's management, the distribution of charging loads may exacerbate the local supply-demand imbalance in the power distribution network (PDN), which negatively impacts the economic operation of the PDN. This paper proposes a profit-sharing mechanism based on the principle of incentive compatibility for coordinating the traffic network (TN) and the PDN to minimize the operation cost of PDN. Under this mechanism, the scheduling process of the power-traffic system is divided into two stages. At the pre-scheduling stage, the TNO allocates traffic flow and charging loads without considering the operation of the PDN, after which the DNO schedules and obtains the original cost. At the rescheduling stage, the DNO shares part of benefits of the optimal operation to the TNO to re-dispatch the EVs’ charging to obtain a more effective charging plan, thus minimize the overall cost of PDN. Then, a bilevel model is developed to simulate the operation of the power-traffic system with the proposed sharing scheme and identify the best sharing ratio. Finally, numerical results demonstrate that the PDN can achieve the minimum total cost and simultaneously the TN can also benefit from the proposed profit-sharing mechanism. © 2025, CC BY-NC-ND.

关键词： Profitability

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Fault Diagnostic Opportunities for Electromagnetic Coils of Active Magnetic Bearings using Physics-of-Failure Analysis 5

Fault Diagnostic Opportunities for Electromagnetic Coils of ...

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5th International Conference on System Reliability and Safety engineering, SRSE 2023

作者： Li, Ruiqi Wang, Kai Zeng, Peng Cao, Jiwei Chinese Academy of Sciences Key Laboratory of Networked Control Systems Shenyang110016 China Chinese Academy of Sciences Institutes for Robotics and Intelligent Manufacturing Shenyang110169 China University of Chinese Academy of Sciences Beijing100049 China Chinese Academy of Sciences Shenyang Institute of Automation Shenyang110016 China Harbin Institute of Technology Department of Electrical Engineering China

ISBN: (纸本)9798350305944

Active magnetic bearings (AMBs) have many advantages over traditional oil bearings due to their non-contact characteristics. They are environmentally friendly solution and have been proven to be highly reliable and available. Electromagnetic coils are vital components of AMB and they are failure prone. In this paper, the failure mode of magnetic bearing coil and its corresponding failure mechanism are reviewed by FMMEA method, and the existing coil fault diagnosis methods are introduced. Future directions for coil insulation health monitoring aiming at the application characteristics of AMBs are also discussed. © 2023 IEEE.

关键词： Failure analysis

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A Sensorless Method based on Zero-sequence Back-EMF for Five-phase Open-end Winding PMSM with Deadtime Compensation

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IEEE Transactions on Energy Conversion 2025年

作者： Jiang, Chunyang Wang, Yingjie Liu, Hongchen Wheeler, Pat Bao, Danyang Northeast Forestry University College of Computer and Control Engineering Harbin150001 China Harbin Institute of Technology School of Electrical Engineering and Automation Harbin150001 China University of Nottingham Department of Electrical and Electronics Engineering NottinghamNG7 2RD United Kingdom Shenzhen Polytechnic University School of Mechanical and Electrical Engineering Shenzhen518000 China

This paper proposes a sensorless method using the zero-sequence back electromotive force (ZSB-EMF) for five-phase open-end winding permanent magnet synchronous machine (OEW-PMSM) with common dc bus. The output of the zero-sequence controller, which is applied to suppress the zero-sequence current (ZSC), is used to reconstruct the ZSB-EMF. Then the position of the rotor is extracted from the output signal of the zero-sequence controller by single phase locked loop. A compensation of the deadtime is proposed to eliminate the negative effect for the position estimation and increase the effective modulation index. The proposed method needs no parameters of the motor, like the resistance, d-q inductance, which are vulnerable and might affect the accuracy of the estimation for the conventional sensorless methods based on the ZSB-EMF. It is easy to implement and the resistance network and complex calculation of conventional methods are also avoided. Experimental results on the five-phase open-end winding PMSM drive system are shown to validate the proposed sensorless method. © 1986-2012 IEEE.

关键词： Permanent magnets

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