Article
Engineering, Manufacturing
Zhi Wang, Delun Wang, Yu Wu, Huimin Dong, Shudong Yu
Summary: The motion accuracy of a linear axis is currently represented by geometric errors in standards, but new invariant methods have been proposed to identify translational and angular error motions based on global kinematic properties, providing a more rigorous and accurate approach for precision testing.
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
(2021)
Article
Engineering, Multidisciplinary
Jiyun Zhang, Zhifeng Lou, Kuang-Chao Fan, Hanping Zhang, Jingjie Zhou
Summary: This study aims to establish a precision vertical planar stage to provide programmable planar references for field accuracy calibration of areal sensors. By modeling, measuring, and compensating the spatial positional errors, the real-time motion accuracy of the planar stage is improved. A new six-degree-of-freedom measurement system is proposed for simultaneous measurement of all geometric errors. Experimental verification shows that the developed vertical stage achieves 89.1% accuracy improvement after positional error compensation. This vertical planar stage can generate any shape of programmed trajectory for the calibration of industrial areal sensors.
Article
Engineering, Multidisciplinary
Feng Tianci, Cui Chengjun, Wang Shan, Dong Dengfeng, Zhou Weihu, Li Jianli
Summary: In this paper, a universal scheme for correcting the range accuracy of laser tracker based on Abbe principle is proposed. The reasons for the Abbe error are analyzed and theoretical calculations and simulations are performed. The experimental results show that the proposed method can significantly improve the ranging accuracy and is also applicable to other submicron measuring instruments.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2022)
Article
Automation & Control Systems
Guohua Chen, Lin Zhang, Xiangjie Wang, Chao Wang, Hua Xiang, Guangqing Tong, Dianzhang Zhao
Summary: In this study, a new machine tool volumetric error model containing Abbe error is proposed based on the traditional machine tool volumetric error models, by analyzing the mechanism of Abbe error formation. A qualitative and quantitative simulation method is presented for the evaluation of machine tool space precision. The validity and feasibility of the model are verified through an example.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Automation & Control Systems
Yaozhou Pu, Ling Wang, Ming Yin, Guofu Yin, Luofeng Xie
Summary: This paper investigates error modeling methods and identification algorithms for geometric errors, as well as develops a new R-Test device. The effectiveness of the measurement method is verified through a four-point measurement experiment.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Zhi-Feng Lou, Li Liu, Ji-Yun Zhang, Kuang-chao Fan, Xiao-Dong Wang
Summary: The paper presented a novel self-calibration method for five degrees-of-freedom error motions of rotary tables, which eliminated measurement errors caused by installation errors of grid discs by analyzing indication differences between reading heads. Experimental results demonstrated the effectiveness and feasibility of the proposed self-calibration method for error motions of the rotary table.
Article
Engineering, Multidisciplinary
Jiapeng Mou, Jingjing Su, Tengchao Huang
Summary: The fiber optic gyroscope has broad application prospects in dynamic calibration of rotary table angular position. A novel data synchronization method proposed in this paper effectively guarantees synchronization between the rotary table and FOG, meeting the requirements for dynamic calibration.
Article
Engineering, Multidisciplinary
Yang Gao, Junhong Xiang, Gangyi Wang
Summary: Precision calibration is crucial for achieving accurate measurement in infinity imaging cameras, and calibration methods based on multi-axis rotary tables are widely used due to their high accuracy and strong operability. However, conventional methods that optimize an integrated model often result in a coupling between intrinsic and extrinsic parameters, which can affect the accuracy of each parameter when applied separately. In addition, existing methods with parameters separation require intricate manual adjustment. To address these issues, a novel calibration method is proposed, which achieves parameters separation through automatic calculation. By using pure rotation motions based on a three-axis rotary table, a correspondence between two sets of virtual homonymic points is established to solve the initial estimates of parameters, effectively eliminating the coupling between calibration points and intrinsic parameters. Simulation and experimental results confirm the effectiveness of the proposed method, with a measurement accuracy improvement of 10.72% compared to traditional methods.
Article
Engineering, Multidisciplinary
Dongfeng He, Jianhua Wang, Feiyao Huang, Chunxia Lu
Summary: This paper presents an error separation method using harmonic regeneration (the ES-HR method) to reduce the influence of radial error motions in rotary tables on gear pitch measurements. The method decomposes the measurement results into different period components by a discrete Fourier transform, extracts the integral period components to regenerate the pitch deviations, and subtracts the influence of integral period radial error motions to obtain accurate gear pitch deviations. Experimental results demonstrate that this method effectively eliminates the influence of radial error motions and provides higher accuracy and less uncertainty compared to existing evaluation algorithms.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2023)
Article
Chemistry, Analytical
Renjian Feng, Jiaxuan Yan, Yinfeng Wu, Ning Yu, Xudong Yin
Summary: This study introduces the total harmonic distortion (THD) index and its calculation methods for calibrating the sinusoidal motion of the low-frequency angular acceleration rotary table (LFAART) and addressing the evaluation limitations based on angular acceleration amplitude and frequency error indexes. THD is calculated using two measurement schemes: a combination of optical shaft encoder and laser triangulation sensor, and a regular scheme using fiber optical gyroscope (FOG). An improved reversing moments recognition method is proposed to enhance the accuracy of solving the angular motion amplitude based on optical shaft encoder output. Field experiment results show that the difference in THD values obtained from the combination scheme and FOG is within 0.11% when the FOG signal-to-noise ratio is higher than 7.7 dB, indicating the accuracy of the proposed methods and the feasibility of using THD as an index.
Article
Engineering, Multidisciplinary
Shota Onishi, Soichi Ibaraki, Tomoyasu Kato, Masashi Yamaguchi, Takao Sugimoto
Summary: This paper proposes a novel scheme to separately identify the geometric errors of linear and rotary axes by using a touch-trigger probe and an uncalibrated test piece. Two case studies are presented, showing the long-term change in geometric errors and the influence of room temperature change on error motions.
Article
Engineering, Multidisciplinary
F. Keller, M. Stein
Summary: A novel method for determining rotary table errors in six degrees of freedom on coordinate measuring machines and machine tools is presented. The method uses an uncalibrated circular ball plate and measures it at different rotational positions on the rotary table, known as the three-rosette method. This new procedure reduces the number of measurement positions significantly compared to the complete three-rosette method, while maintaining a low measurement uncertainty. The method is self-calibrating and does not require an external reference. The design of a new ball plate allows for the determination of rotary table errors in angular steps of only 5°.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Jingxuan Ban, Gang Chen, Lei Wang, Yue Meng
Summary: This paper proposes a method to calibrate and compensate the temperature errors of rotary optical encoders, achieving higher measurement accuracy by designing an independent testing mechanism and using a gyroscope to calculate the temperature error.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2022)
Article
Instruments & Instrumentation
P. Chen, M. Yu, Z. Deng, M. Zhang, J. Liu, J. Fan, C. Hu, L. Tu
Summary: This paper analyzes the relationship between rotary table wobble and errors in a rotating accelerometer gravity gradiometer (RAGG) and proposes a method for rejecting these errors. Through simulated experiments and error correction, the errors in the RAGG output are successfully reduced.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Engineering, Multidisciplinary
Tao Cheng, Sitong Xiang, Hainan Zhang, Jianguo Yang
Summary: This paper presents a new machining test for identifying the geometric and thermal errors of rotary axes on a five-axis machine tool. The test piece and measurement methods are designed to accurately identify various errors of the rotary axis. The proposed method shows good agreement with classical machining tests, and the identification principle and analytical solution for each error are simple and unaffected by linear axes, thus improving the accuracy of machining.
Article
Engineering, Mechanical
Zitian Wei, Xuewen Yin, Shudong Yu, Wenwei Wu
Summary: This paper proposes a new dynamic stiffness formulation for transverse and in-plane vibration of rectangular plates, utilizing a generalized superposition method to obtain homogeneous solutions and forming dynamic stiffness matrices through projection method. The finite element technique is used to address the dynamics of plate assemblies in global coordinates, with numerical examples demonstrating the effectiveness and accuracy of the proposed method.
INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Z. H. Wang, B. Niu, Q. Wang, C. Dong, J. C. Jie, T. M. Wang, T. G. Nieh
Summary: The newly designed ultrastrong MSS exhibits extremely high ultimate tensile strength and decent uniform elongation, offering a new pathway for developing high-performance MSSs.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Junchi Chen, Shudong Yu, Ting Fu, Liang Xu, Yong Tang, Zongtao Li
Summary: The kapok petal exhibits superhydrophobic characteristics due to densely distributed microscale trichomes with a reentrant curvature, unlike other natural superhydrophobic surfaces with hierarchical morphologies. The petal's self-cleaning ability is excellent, and the proposed mechanism suggests potential applications in various fields.
BIOINSPIRATION & BIOMIMETICS
(2022)
Article
Mechanics
Chu Zhang, Huimin Dong, Chuang Zhang, Delun Wang, Shudong Yu
Summary: This paper presents an effective node-to-surface contact scheme for handling three-dimensional quasi-static contact between deformable bodies with prescribed rigid body motion. Through testing and comparisons with standard solutions, the scheme's accuracy and efficiency were verified, demonstrating its versatility and effectiveness in mechanical system design.
Article
Chemistry, Physical
Fei Liang, Xujiang Chao, Shudong Yu, Yuheng Gu, Xiaohui Zhang, Xin Wei, Jintu Fan, Xiao-ming Tao, Dahua Shou
Summary: The TO-DEHF, with optimized fabric electrodes, achieves stable and efficient output from randomly falling droplets, significantly increasing peak power density. This all-fabric device is highly flexible and breathable, successfully demonstrated in a self-powered wireless wearable prototype.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Binhai Yu, Zijian Huang, Dong Fang, Shudong Yu, Ting Fu, Yong Tang, Zongtao Li
Summary: The highly scattering porous polymer films prepared through the PIPS method, using fluoropolymer as the matrix, exhibit excellent scattering ability and high total reflectance, making them suitable for improving the light extraction efficiency of LEDs. The simplicity, cost-effectiveness, and scalability of the PIPS method provide potential applications for the porous fluoropolymer films in various fields, including optoelectronics and daytime passive radiative cooling.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Energy & Fuels
Shudong Yu, Bing Guo, Siegbert Johnsen, Gabriele Wiegand, Uli Lemmer, Xia Guo, Maojie Zhang, Yongfang Li, Christian Sprau, Hendrik Holscher, Alexander Colsmann, Guillaume Gomard
Summary: The study shows that a bilayer back electrode composed of conductive polymers and nanofoamed PMMA can adjust the absorption and transmission properties of solar cells from opaque to highly transparent. This versatile electrode enhances light absorption in wavelength regimes with lower absorption coefficients, making it particularly suitable for frosted window applications.
Article
Materials Science, Multidisciplinary
Guanwei Liang, Yong Tang, Peisen Chen, Jiasheng Li, Yikai Yuan, Shudong Yu, Liang Xu, Zongtao Li
Summary: The study presents an optical diffuser based on polystyrene-fiber rods dispersed in polydimethylsiloxane resin, which shows excellent light-scattering performance and efficient light diffusion in the visible-light region. By filling PFRs in quantum dot films, the photoluminescence intensity is enhanced, showing potential for optical performance improvement in QD-based LEDs.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Computer Science, Interdisciplinary Applications
Zhi Wang, Yahui Zhang, David Kennedy
Summary: This paper proposes an equivalent linearization method considering higher order statistics for the geometrically nonlinear random vibration problems of complex structures, based on nonlinear reduced order modeling techniques. The nonlinear reduced order models are constructed using commercial finite element codes, and an improvement to the stiffness coefficients determination is achieved through the equivalence relation, resulting in a significant reduction in computational cost and eliminating the need for additional commercial finite element codes. The nonlinear terms are regulated to introduce higher order statistics into the equations of motion, and a linearized system is used to predict the random response of the original nonlinear system, significantly increasing computational efficiency.
COMPUTERS & STRUCTURES
(2022)
Article
Thermodynamics
Guanghan Huang, Kairui Tang, Shudong Yu, Yong Tang, Shiwei Zhang
Summary: This study investigated the enhanced pooling boiling of a nanoporous copper surface under low pressure conditions. The experimental results showed that the nanoporous surface significantly improved the pool boiling heat transfer and mitigated the negative influence of sub-atmospheric conditions. The study also found that the nanoporous surface led to higher heat transfer coefficient enhancement at a lower pressure.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Longshi Rao, Qing Zhang, Bin Sun, Mingfu Wen, Jiayang Zhang, Shudong Yu, Ting Fu, Xiaodong Niu
Summary: By embedding CsPbBr3 in a Cs4PbBr6 matrix, the issues of intrinsic instability and decreased photoluminescence quantum yield (PLQY) in the solid-state are simultaneously addressed. The optimized CsPbBr3/Cs4PbBr6 microcrystals show a high PLQY and improved photostability and thermostability. The CsPbBr3/Cs4PbBr6 microcrystals are successfully applied in white LEDs (WLEDs) with high optical and temperature/humidity-stable performances.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Editorial Material
Gastroenterology & Hepatology
Zhi-hui Wang, Xiang-rong Zhou, Wei-hui Liu
Article
Engineering, Electrical & Electronic
Hairui Yang, Baoli Sun, Baopu Li, Caifei Yang, Zhihui Wang, Jenhui Chen, Lei Wang, Haojie Li
Summary: This paper proposes a novel Iterative Class Prototype Calibration (ICPC) framework to address the domain shift issue in conventional zero-shot learning (ZSL). The proposed framework uses a pseudo-labeling stage and a model retraining stage to improve the generalization performance of ZSL models.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY
(2023)
Article
Computer Science, Artificial Intelligence
Wei Wang, Ziyi Wang, Mengzhu Wang, Haojie Li, Zhihui Wang
Summary: This paper proposes a new label form, called importance filtered soft label, which maximizes the nuclear norm of a soft label matrix to filter noisy probability values and produce a more reliable form of importance filtered soft label. Several prevalent label-induced losses are reformulated using this label form in a probability-weighted manner to optimize them more correctly and alleviate the negative adaptation problem.
KNOWLEDGE-BASED SYSTEMS
(2023)
Review
Chemistry, Physical
Shudong Yu, Yuheng Gu, Xujiang Chao, Guanghan Huang, Dahua Shou
Summary: Interfacial solar vapor generation (ISVG) has gained increasing attention in academia due to its significant improvement in evaporation efficiency compared with previous designs. This review summarizes the recent development in ISVG systems, including constituent elements, fabrication techniques, design principles, and optimization strategies. Various application scenarios and future prospects are also discussed. ISVG is a green and low-cost technique that shows great potential for producing clean water in remote and off-grid regions.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
