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China Instrument and Control Society (ACCIS), Academic Conference of

作者： Xiao Cui Zhongxin Zhang Canwei Li Aviation Key Laboratory of Science and Technology on Precision Manufacturing Technology Beijing Precision Engineering Institute for Aircraft Industry Beijing China

ISBN: (数字)9798350350326

ISBN: (纸本)9798350350333

The high-precision integrated inspection center is mainly used for the full-size inspection of given types of wheelsets, wheels, and axles, and can realize functions such as contact measurement and non-contact measurement, with characteristics of high measurement accuracy and easy operation. This paper introduces the main functional requirements of the high-precision integrated inspection center, analyzes the principle realization of specific functions, establishes a three-dimensional model of the high-precision integrated inspection center, analyzes the specific structural design features of the high-precision integrated inspection center, and finally draws conclusions based on analysis and application.

关键词： Solid modeling Analytical models Accuracy Instruments Wheels Inspection Reliability engineering Software Finite element analysis Axles

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A radar-infrared compatible broadband absorbing surface:Design and analysis

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Chinese Physics B 2021年第7期30卷 605-612页

作者： Qing-Tao Yu Yuan-Song Zeng Guo-Jia Ma Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering AVIC Manufacturing Technology InstituteBeijing 100024China

A radar-infrared compatible stealth surface is designed and *** modifying the radar absorbing material(RAM),the design can theoretically achieve radar-infrared compatibility and broadband radar absorption through surface patterns and structures.A transmission-line-based model(TLM)is developed to analyze the radar absorbing performance of the *** of the structure geometries is conducted aiming to maximize the-10 d B absorption bandwidth in 2–18 *** with optimized structure geometries exhibits a superior absorption bandwidth,more than twice the bandwidth of the original 1.5 mm RAM slab,while maintaining a relatively low infrared emissivity.

关键词： stealth infrared-radar compatible broadband absorbing patterned surface

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Indoor object segmentation based on YOLACT++

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International Journal of Wireless and Mobile Computing 2023年第2期24卷 127-133页

作者： Sun, Ying Zhao, Zichen Tao, Bo Liu, Xin Yun, Juntong Liu, Ying Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Hubei Wuhan China Research Centre for Biomimetic Robot and Intelligent Measurement and Control Wuhan University of science and Technology Hubei Wuhan China Precision Manufacturing Research Institute Wuhan University of Science and Technology Hubei Wuhan China

Intelligent manufacturing originates from the research of artificial intelligence, which can not only reduce operating costs, but also improve product quality, and has become the way to cultivate new advantages in forging international competition in manufacturing. With the transformation of traditional manufacturing to intelligent manufacturing, the course of intelligent manufacturing should also be different from the traditional teaching mode, but through the survey, it has been found that the course of intelligent manufacturing still has a single teaching mode, insufficient innovative guidance for students and insufficient combination of theory and practice. In order to solve the issues mentioned above, the Project-Analysis-Evaluation (PAE) structure is proposed in this paper, and it is combined with constructivist theory and analysed through the study of indoor object instance segmentation detection. The YOLACT++ algorithm is pre-trained on SUNRGBD dataset and applied to indoor environment detection in this paper. © 2023 Inderscience Enterprises Ltd.

关键词： Operating costs

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Simulation and Experimental Study of C/SiC Composites by Laser-ultrasonic Hybrid Micromachining

Simulation and Experimental Study of C/SiC Composites by Las...

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2023 Annual IEEE International Conference on Manipulation, manufacturing and Measurement on the Nanoscale, 3M-NANO 2023

作者： Li, Jicheng Xu, Jinkai Chen, Guangjun Zhou, Fei Fu, Kaiming Changchun University of Science and Technology Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing National and Local Joint Engineering Laboratory for Precision Manufacturing and Detection Technology Changchun China

ISBN: (纸本)9798350344486

High strength, high stiffness, low density, low thermal expansion coefficient, etc., are all characteristics of C/SiC composites, but fiber extraction, matrix cracks and burrs are prone to occur during processing which make it difficult for the parts to meet the requirements of high precision and quality. Laser-ultrasonic hybrid micromachining (L-UHM) is a recent research hotspot and has been shown to have a positive impact on the machining quality of ceramic matrix composites. The research focuses on L-UHM's effects on the processing of C/SiC composites at various fiber orientations. Through the analysis of the temperature field simulation of laser parameters on the effect of heat affected zone (HAZ), and conventional machining (CM) and L-UHM orthogonal micromachining models were established to investigate how two alternative fiber direction cutting circumstances affect the failure mode of C/SiC composites. The findings indicate that compared with CM, LUHM significantly improves the surface quality both in the vertical longitudinal fiber direction and the parallel fiber direction. When P=60W/mm2 and A=6μ m, respectively, the surface roughness is reduced by 29.9 % and 35.3 %, respectively. © 2023 IEEE.

关键词： Micromachining

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The dielectric behavior and efficient microwave absorption of doped nanoscale LaMnO_(3)at elevated temperature

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Nano Research 2022年第8期15卷 7731-7741页

作者： Zhigang Mu Guoke Wei Hang Zhang Lu Gao Yue Zhao Shaolong Tang Guangbin Ji College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering AVIC Manufacturing Technology InstituteBeijing 100024China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093China

LaMnO_(3)perovskite has great potential in microwave absorption at high temperature due to its complex doping effect and super *** current research mainly focuses on the doping ratio regulation,while the mechanism of doping effect at high temperature is still lack of sufficient *** this work,La1−xSrxMn1−yFeyO_(3)(LaMnO_(3),La_(0.7)Sr_(0.3)MnO_(3),and La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3))nanostructures with different doping sites were successfully prepared by the solid phase reaction ***,the high temperature dielectric test samples were obtained by mixing with cordierite(2MgO·2Al_(2)O_(3)·5SiO_(2)(MAS)).The results showed that the temperature dependence of Mn ion spin state had a significant impact on the high temperature dielectric behavior of La_(1−x)Sr_(x)Mn_(1−y)FeyO_(3).Particularly,when the thickness is only 1.9 mm,La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3)/MAS can achieve the widest bandwidth of 4.2 GHz covered the entire X-band(8.2–12.4 GHz)and a minimum reflection loss(RL)value of−17.99 dB at 500℃.In order to improve the operating temperature of La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3)/MAS,a cellular array structure was designed by using computer simulation technology(CST)software to introduce magnetic *** the outer length of the hexagon is 1 mm and the coating thickness is 1.9 mm,the widest bandwidth covers the X-band and the minimum RL value is−15.35 dB at 800℃.Therefore,La_(0.7)Sr_(0.3)Mn_(0.8)Fe_(0.2)O_(3)has a great prospect as an efficient high temperature microwave absorber.

关键词： microwave absorption doping perovskite high temperature dielectric behavior

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Multifactorial impacts of B-doping on Fe81Ga19 alloys prepared by laser-beam powder bed fusion:Microstructure,magnetostriction,and osteogenesis

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材料科学技术（英文版） 2025年第2期205卷 14-26页

作者： Chengde Gao Liyuan Wang Youwen Deng Shuping Peng Cijun Shuai State Key Laboratory of Precision Manufacturing for Extreme Service Performance College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China Department of Spine Surgery The Third Xiangya HospitalCentral South UniversityChangsha 410013China The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education Xiangya HospitalCentral South UniversityChangsha 410078China NHC Key Laboratory of Carcinogenesis Cancer Research InstituteSchool of Basic Medical ScienceCentral South UniversityChangsha 410013China State Key Laboratory of Precision Manufacturing for Extreme Service Performance College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China Institute of Additive Manufacturing Jiangxi University of Science and TechnologyNanchang 330013China College of Mechanical Engineering Xinjiang University Urumqi 830017China

Magnetostrictive Fe-Ga alloys have captivated substantial focus in biomedical applications because of their exceptional transition efficiency and favorable ***,Fe-Ga alloys always exhibit frustrating magnetostriction coefficients when presented in bulk *** is well-established that the magnetostrictive performance of Fe-Ga alloys is intimately linked to their phase and crystal *** this study,various concentrations of boron(B)were doped into Fe81Ga19 alloys via the laser-beam powder bed fusion(LPBF)technique to tailor the crystal and phase structures,thereby im-proving the magnetostrictive *** results revealed the capacity for quick solidification of the LPBF process in expediting the solid solution of B element,which increased both lattice distortion and dislocations within the Fe-Ga *** factors contributed to an elevation in the density of the modified-D03 phase ***,the prepared Fe-Ga-B alloys also exhibited a(001)preferred grain orientation caused by the high thermal gradients during the LPBF *** a result,a maximum magnetostriction coefficient of 105 ppm was achieved in the(Fe81Ga19)98.5B1.5 *** alternating mag-netic fields,all the LPBF-prepared alloys showed good dynamic magnetostriction response without visible hysteresis,while the(Fe81Ga19)98.5B1.5 alloy presented a notable enhancement of～30％in magnetostric-tion coefficient when compared with the Fe81Ga19 ***(Fe81Ga19)98.5B1.5 alloy exhibited favorable biocompatibility and osteogenesis,as confirmed by increased alkaline phosphatase(ALP)ac-tivity and the formation of mineralized *** findings suggest that the B-doped Fe-Ga alloys combined with the LPBF technique hold promise for the development of bulk magnetostrictive alloys that are applicable for bone repair applications.

关键词： Fe-Ga alloys Laser-beam powder bed fusion Boron doping Magnetostriction Cytocompatibility

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Experimental Study on Ultrasonic Assisted Helical Grinding of Sic/Sic Composites

Experimental Study on Ultrasonic Assisted Helical Grinding o...

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2023 Annual IEEE International Conference on Manipulation, manufacturing and Measurement on the Nanoscale, 3M-NANO 2023

作者： Fu, Kaiming Xu, Jinkai Chen, Guangjun Zhou, Fei Li, Jicheng Changchun University of Science and Technology Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing National and Local Joint Engineering Laboratory for Precision Manufacturing and Detection Technology Changchun China

ISBN: (纸本)9798350344486

With the gradual improvement of the speed of aircraft and automobiles, in order to ensure their safe braking, the requirements for new brake materials and the demand for processing methods are becoming more and more urgent. SiC/SiC composites have drawn a lot of interest because of their exceptional qualities, including high strength, high thermal stability, and low density. The goal of this study is to compare traditional helical grinding (CHG) with ultrasonic vibration aided helical grinding (UVAHG). The ABAQUS finite element simulation model of single abrasive cutting of UVAHG and CHG was established to analyze the stress distribution on the material under different processing methods. It can be seen from the experimental results that the effect of ultrasonic vibration can significantly improve the stress concentration and crack propagation defects during the machining process of the workpiece, and the surface quality of the machined surface has also been improved. © 2023 IEEE.

关键词： Grinding (machining)

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Ultrasonic vibration-assisted cutting of titanium alloys:A state-of-the-art review

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Chinese Journal of Aeronautics 2025年第1期38卷 3-42页

作者： Ahmar KHAN Xin WANG Biao ZHAO Wenfeng DING Muhammad JAMIL Aqib Mashood KHAN Syed Hammad ALI Sadam HUSSAIN Jiong ZHANG Raj DAS National Key Laboratory of Science and Technology on Helicopter Transmission Nanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Mechanical Engineering College of EngineeringCity University of Hong KongHong Kong 999077China Centre for Additive Manufacturing School of EngineeringAerospace Engineering and AviationRMIT UniversityVictoria 3083Australia

The remarkable ability of titanium alloys to preserve their superior physical and chemical characteristics when subjected to extreme conditions significantly enhances their importance in the aerospace,military,and medical ***,conventional machining of titanium alloys leads to elevated tool wear,development of surface defects,and reduced machining efficiency due to their low heat conductivity,and chemical *** issues can be somewhat counteracted by integrating ultrasonic vibration in the conventional machining of titanium alloys and also enhance *** review article offers a holistic evaluation of the influence of ultrasonic vibration-assisted milling and turning on cutting forces,temperature,tool wear,and surface integrity,encompassing surface morphology,surface roughness,surface residual stress,surface hardness,and surface tribological properties during titanium alloys ***,it investigates the sustainability aspect that has not been previously *** on the performance of ultrasonic-assisted cutting revealed several advantages,including decreased cutting forces and cutting temperature,improved tool life,and a better-machined surface during ***,the sustainability factor is improved due to minimized energy consumption and residual *** conclusion,the key challenges and future prospects in the ultrasonic-assisted cutting of titanium alloys are also *** review article provides beneficial knowledge for manufactur-ers and researchers regarding ultrasonic vibration-assisted cutting of titanium alloy and will play an important role in achieving sustainability in the industry.

关键词： Ultrasonic vibration-assisted cutting Titanium alloys Material removal mechanism Machinability Sustainability

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Visual Recognition of Surface Defects in a Robotic Lacquer Removing System for Radome Remanufacturing 23rd

Visual Recognition of Surface Defects in a Robotic Lacquer R...

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23rd IFToMM China International Conference on Mechanism and Machine science and Engineering, IFToMM CCMMS 2022

作者： Shao, Hua Zhang, Zhi Guo, Xiaohang Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan430081 China Precision Manufacturing Institute Wuhan University of Science and Technology Wuhan430081 China

ISBN: (纸本)9789811993978

Defect identification on the surface of aircraft radome is an important issue of the radome remanufacturing. This paper radome surface defect recognition for a robotic lacquer removing system. An improved Canny operator is proposed, and the curvature operator with an adaptive Gaussian filter can effectively locate the location of radome surface defects. Finally, the algorithms are verified by radome example pictures, The result shows that the improved Canny operator improves the evaluation index by 10.17% compared with the traditional operator. It proves the effectiveness of the enhanced operator in detecting defects, and the operator can also be applied to interfering situations such as image exposure, blurring, and much noise, which has better practicality. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Surface defects

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Fast Mask Optimization Based on Self-Calibrated Convolutions 3

Fast Mask Optimization Based on Self-Calibrated Convolutions

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3rd International Conference on Optics and Image Processing, ICOIP 2023

作者： Zhao, Yichen Xu, Shuang Pan, Jinwei Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan430081 China Precision Manufacturing Institute Wuhan University of Science and Technology Wuhan430081 China

ISBN: (纸本)9781510667426

A mask optimization method based on self-calibrated convolutions is proposed in this paper to reduce the imaging distortion caused by optical proximity effect(OPE). The network model was constructed by combining the inverse lithography technology(ILT), and the parameters of the network model were optimized by the dataset for training. The dataset includes the target pattern and the mask optimized by gradient descent method. The network model based on self-calibrated convolutions can output an optimized mask according to the target pattern, and the optimized mask is passed through the lithography forward model to obtain the exposure pattern. By the simulation experiment, compared with the traditional gradient-based method, proposed method in this paper has high computational efficiency and small error. © 2023 SPIE. All rights reserved.

关键词： Convolution

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