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Development of Cutting co.dition Monitoring System for ID-blade Saw Slicing Machine

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武汉理工大学学报 2006年第S1期28卷 79-84页

作者： KAWASHIMA Kazuo asahi diamond industrial co. Ltd102-0094Japan

The purpose of this study is focused on development of an online monitoring system for measuring and evaluating the cutting co.dition as the ID-blade saw is cutting a silico. ingot. First,the cutting experiments are carried out and the cutting signals during the blade slicing a six-inch ingot are measured by a 3-axes load sensor which is mounted on the top of the ingot. To evaluate the blade co.dition in slicing,a novel data processing method,co.bining the discrete Fourier transform(DFT) with the discrete Wavelet transform(DWT),is proposed in this paper for extracting the co.ponents due to the rotation of the blade and the cutting impedance. To validate the effect of the method,four ID-blades with three different types of the blade edge are used and discussed. The obtained results show that the co.ponent induced from the rotation and the co.ponent due to the blade slicing can be extracted efficiently by introduction of the proposed method. Furthermore,a simple online monitoring system,which co.sists of a 3-axes load sensor or acceleration sensor,DC cuts high-pass filter,and AD co.verter embedded microco.puter,is designed. The estimated cutting co.dition information obtained from the proposed monitoring system can be used as a feedback signal to the slicing machine for production of high quality wafer.

关键词： ID-blade online measurement vibration signals cutting co.dition evaluation discrete fourier transfor

Multi boron-doping effects in hard carbon toward enhanced sodium ion storage

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Journal of Energy Chemistry 2025年第1期100卷 730-738页

作者： Peng Zheng Wang Zhou Ying Mo Biao Zheng Miaomiao Han Qin Zhong Wenwen Yang Peng Gao Lezhi Yang Jilei Liu co.lege of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University Greater Bay Area Institute for Innovation Hunan University Changsha Research Institute of Mining & Metallurgy co. LTD.

Hard carbon （HC） has been co.sidered as promising anode material for sodium-ion batteries （SIBs）.The optimization of hard carbon’s microstructure and solid electrolyte interface （SEI） property are demonstrated effective in enhancing the Na+storage capability,however,a one-step regulation strategy to achieve simultaneous multi-scale structures optimization is highly ***,we have systematically investigated the effects of boron doping on hard carbon’s microstructure and interface chemistry.A variety of structure characterizations show that appropriate amount of boron doping can increase the size of closed pores via rearrangement of carbon layers with improved graphitization degree,which provides more Na+storage ***-situ Fourier transform infrared spectrosco.y/electrochemical impedance spectrosco.y （FTIR/EIS） and X-ray photoelectron spectrosco.y （XPS） analysis demonstrate the presence of more BC3and less B–C–O structures that result in enhanced ion diffusion kinetics and the formation of inorganic rich and robust SEI,which leads to facilitated charge transfer and excellent rate *** a result,the hard carbon anode with optimized boron doping co.tent exhibits enhanced rate and cycling *** general,this work unravels the critical role of boron doping in optimizing the pore structure,interface chemistry and diffusion kinetics of hard carbon,which enables rational design of sodium-ion battery anode with enhanced Na+storage performance.

关键词： X ray photoelectron spectrosco.y

Vibration signal-based chatter identification for milling of thin-walled structure

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Chinese Journal of Aeronautics 2022年第1期35卷 204-214页

作者： Wenping MOU Shaowei ZHU Zhenxi JIANG Ge SONG NC Machining Plant Chengdu Aircraft Industrial(Group)Co.LtdChengdu 610092China

In high speed milling aeronautical part,tool co.dition monitoring(TCM)is very important,because it is prone to get a chatter owing to the low stiffness of thin-walled *** the TCM is key technology for automated *** this paper,aiming to chatter monitoring in thin-walled structure milling,a variational mode deco.position–energy distribution(VMD-ED)method is proposed to improve the identification *** a moving average root mean square–mean value(MARMS-MV)identification method and a variational mode deco.position–energy entropy(VMD-EE)identification method are also *** accuracy and co.puting time of the three methods are *** vibration signals co.lected from the spindle and worktable are also *** co.ducted experimental study shows that,the proposed VMD-ED method offers an identification method for chatter monitoring with greater sensitivity,better stability and less co.puting time,and mounting the vibration sensor on worktable is better than spindle for a chatter monitoring system.

关键词： Chatter Milling Thin-walled structure Tool co.dition monitoring Vibration

Sensor fault-tolerant observer applied in UAV anti-skid braking co.trol under co.trol input co.straint

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Journal of Systems Engineering and Electronics 2017年第1期28卷 126-136页

作者： Hui Sun Jianguo Yan Yaohong Qu Jie Ren School of Automation Northwestern Polytechnical University Chengdu Aircraft industrial (Group) co. Ltd.

This paper proposes a method for addressing the problem of sensor fault-tolerant co.trol (FTC) for anti-skid braking systems (ABSs). When the wheel velocity sensor of the ABS for unmanned aerial vehicles (UAVs) beco.es faulty, wheel velocity failure and feedback instability may occur. Firstly, a fault diagnosis and isolation (FDI) method based on a sliding mode observer approach is introduced to detect and isolate the fault of the sensor. When the wheel velocity sensor is in healthy co.ditions, the observer works in a diagnosis mode. If faults occur in the sensor, it acts as a wheel velocity estimator. Seco.dly, an FTC strategy, adopting a feedback co.pensation structure, is designed with input co.trol co.straints. In addition, based on the FDI result, a terminal sliding mode (TSM) co.troller is designed to guarantee that slip-ratio tracks its appropriate reference values in situations where runways change co.ditions during landing. The co.trol system switches automatically from co.trol using a wheel velocity sensor to sensorless co.trol mode, so the observer-based FTC scheme is established. It is logical that the ABS keeps observed-state and remains stable when the wheel velocity sensor is broken and during external disturbance. Finally, simulation results show the effectiveness of the proposed method. © 1990-2011 Beijing Institute of Aerospace Information.

关键词： Braking co.trol systems Failure analysis Fault tolerance Feedback Sensorless co.trol Sliding mode co.trol Unmanned aerial vehicles (UAV) Velocity Wheels

The overview of industrial diamond in Korea

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金刚石与磨料磨具工程 2008年第S1期28卷 21-22页

作者： Lee Yoon-Young President & CEO ILJIN diamond co. Ltd.

Introduction industrial tools using diamonds were first introduced in the Korean market about thirty years *** the beginning,diamond tools were primarily used in industries dealing with stone ***,however, they are foc... 详细信息

关键词： The overview of industrial diamond in Korea high than PCBN

Effect of sintering parameters on the microstructure and thermal co.ductivity of diamond/Cu co.posites prepared by high pressure and high temperature infiltration

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International Journal of Minerals,Metallurgy and Materials 2013年第2期20卷 180-186页

作者： Hui Chen Cheng-chang Jia Shang-jie Li School of Materials Science and Engineering University of Science and Technology Beijing Shenzhen Haimingrun industrial co. Ltd.

Pure Cu co.posites reinforced with diamond particles were fabricated by a high pressure and high temperature （HPHT） infiltration technique. Their microstructural evolution and thermal co.ductivity were presented as a function of sintering parameters （temperature, pressure, and time）. The improvement in interfacial bonding strength and the maximum thermM co.ductivity of 750 W/（m.K） were achieved at the optimal sintering parameters of 1200℃, 6 GPa and 10 min. It is found that the thermal co.ductivity of the co.posites depends strongly on sintering pressure. When the sintering pressure is above 6 GPa, the diamond skeleton is detected, which greatly co.tributes to the excellent thermal co.ductivity.

关键词： metallic matrix co.posites particle reinforced co.posites co.per diamonds infiltration microstructuralevolution thermal co.ductivity

Trust assessment of business service workflow based on co.plex trust network

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High Technology Letters 2015年第1期21卷 22-30页

作者：骆怡航 Fan Yushun Guo Xiaohui Department of Automation Tsinghua University China Tobacco.Guangxi industrial co. Ltd

For business service workflow,QoS-based services selection can't guarantee whether the co.posite service satisfies user' s requirement after delivery,because once any service interrupts or quality of service(QoS) maliciously reduces,the quality of workflow will be *** services can provide reliable QoS,so trustworthiness research co.ld improve the efficiency of services *** paper investigates trust assessment in the perspective of ***,trust network of business service workflow(TN-BSW) is proposed to analyze trust attributes;then,the trust measurement system of TN-BSW is investigated to assess the trust value quantitatively;and then,a trust-aware service reco.mendation model(TaSRM) is proposed to enhance the efficiency of QoS-basedservices selection;finally,experiment shows the feasibility of TN-BSWand the performance of TaSRM.

关键词： business service workflow trust attributes trust assessment quality of service (QoS) service selection

Seismic design or retrofit of buildings with metallic structural fuses by the damage-reduction spectrum

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Earthquake Engineering and Engineering Vibration 2015年第1期14卷 85-96页

作者： Li Gang Jiang Yi Zhang Shuchuan Zeng Yan Li Qiang State Key Laboratory of Structural Analysis of industrial Equipment Dalian University of Technology CCCC Third Harbor co.sultants co. Ltd Xiamen Hordor Architecture & Engineering Design Group co. Ltd

Recently, the structural fuse has beco.e an important issue in the field of earthquake engineering. Due to the trilinearity of the pushover curve of buildings with metallic structural fuses, the mechanism of the structural fuse is investigated through the ductility equation of a single-degree-of-freedom system, and the co.responding damage-reduction spectrum is proposed to design and retrofit buildings. Furthermore, the co.trolling parameters, the stiffness ratio between the main frame and structural fuse and the ductility factor of the main frame, are parametrically studied, and it is shown that the structural fuse co.cept can be achieved by specific co.binations of the co.trolling parameters based on the proposed damage-reduction spectrum. Finally, a design example and a retrofit example, variations of real engineering projects after the 2008 Wenchuan earthquake, are provided to demonstrate the effectiveness of the proposed design procedures using buckling restrained braces as the structural fuses.

关键词： seismic design structural fuse damage-reduction spectrum retrofit

Microstructural evolution and properties of a Cu-Cr-Ag alloy during co.tinuous manufacturing process

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Rare Metals 2021年第8期40卷 2213-2220页

作者： Gao-Lei Xu Li-Jun Peng Guo-Jie Huang Hao-Feng Xie Zhen Yang Xue Feng Xiang-Qian Yin Xu-Jun Mi State Key Laboratory of Nonferrous Metals and Processes GRIMAT Engineering Institute Co.Ltd.Beijing101417China Zhejiang Libo industrial co. Ltd.Shaoxing312050China

Microstructure evolution and properties of a Cu-Cr-Ag alloy during the co.tinuous manufacturing process were investigated in detail by scanning electron microsco.y(SEM)and transmission electron microsco.y(TEM)in the *** Cu-Cr-Ag alloy rod with uniform co.positions is fabricated by upward co.tinuous casting *** of the Cr phases are observed in the ascast *** the co.tinuous extrusion process,the severe shear deformation and the dynamic aging *** average grain size of as-extruded alloy is much smaller than that of as-cast *** fcc and bcc Cr precipitates appear in the *** interaction mode between dislocations and precipitates can be identified as Orowan bypass mode acco.ding to the TEM *** overall difference in the yield strength between as-cast and as-extruded Cu-Cr-Ag alloy is attributed to solid solution strengthening,grain refinement strengthening,precipitation hardening and working hardening.

关键词： Cu-Cr-Ag alloy Upward co.tinuous casting co.tinuous extrusion Microstructure Physical properties