Article
Chemistry, Multidisciplinary
Giuseppe Venturini, Niccolo Grossi, Lorenzo Morelli, Antonio Scippa
Summary: The algorithm presented in this work is useful for advanced toolpath definition in milling operations with non-uniform machining allowance. It utilizes a general algorithm for non-uniform offset of polyline curves based on 2D polygons and Boolean union operation. The algorithm is able to handle both internal and external offset and has been proven robust through examples and applications in thin-wall milling.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Manufacturing
Xiangjia Chen, Guoxin Fang, Wei-Hsin Liao, Charlie C. L. Wang
Summary: This method utilizes the anisotropic material property of continuous fibers to generate toolpaths along the directions of tensile stresses in critical regions. The density of toolpath distribution is controlled proportionally to the values of stresses. An optimal scalar field is computed to generate toolpaths for continuous fiber reinforcement, showing significant improvement in mechanical strength compared to traditional load-independent toolpaths.
ADDITIVE MANUFACTURING
(2022)
Article
Computer Science, Interdisciplinary Applications
Yongxue Chen, Yaoan Lu, Ye Ding
Summary: This paper presents an optimization method for directly generating a six-degree-of-freedom toolpath for robotic flank milling. By optimizing the smoothness of the toolpath and the stiffness of the robot, the efficiency, accuracy, and finish of the machining are improved.
ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING
(2024)
Article
Optics
Murilo B. Da Silva, Simon G. Alcock, Ioana-Theodora Nistea, Kawal Sawhney
Summary: This paper presents the development of a Fizeau interferometer stitching system for characterizing the surface profile of advanced X-ray optics. The performance of the system was evaluated by testing two challenging optics and obtained results were compared with other reliable instruments.
OPTICS AND LASERS IN ENGINEERING
(2023)
Review
Engineering, Chemical
Sung-Hyok Ro, Se-Hun Kim
Summary: Mineralogical analysis is a crucial step in mineral processing, providing qualitative and quantitative data about the composition and structure of ores. This paper introduces a method for in-situ mineralogical analysis using a handheld microscope, which addresses the issues of expensive analysis equipment and infeasible in-situ analysis. Experimental results have confirmed the utility and feasibility of this method, suggesting potential for future development of dedicated mineralogical analysis systems.
MINERALS ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Neil J. Naples, Allen Y. Yi
Summary: The complexity of freeform optics drives the complexity of manufacturing processes. This paper develops toolpath generation techniques for specified surfaces and explores the transition between surfaces. The proposed extrapolating surface can modify a freeform surface outside its defined boundary to increase overall continuity of the toolpath.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2023)
Article
Computer Science, Software Engineering
Haemin Kim, Kyungmin Cho, Seokhyeon Hong, Junyong Noh
Summary: This paper proposes a novel motion stitching technique called recurrent motion refiner (RMR) that connects discontinuous locomotions into a single natural locomotion. The model aligns and edits different locomotions to output a smoothly connected animation.
COMPUTER GRAPHICS FORUM
(2023)
Article
Cardiac & Cardiovascular Systems
Samuel D. Maidman, Daniel Bamira, Richard Ro, Alan F. Vainrib, Muhamed Saric
Summary: Despite advances in 3D transesophageal echocardiography imaging, orienting and correlating images remains challenging. This article suggests repurposing stitching artifacts in 2-beat electrocardiogram-gated 3D TEE to precisely orient 3D images in a patient's unique anatomy. The technique is demonstrated in assessing a normal mitral valve, localizing mitral valve prolapse scallops, and visualizing left atrial appendage in 3D space. Cardiac imagers can benefit from this method for optimal individualized echocardiographic views.
JOURNAL OF THE AMERICAN SOCIETY OF ECHOCARDIOGRAPHY
(2023)
Article
Chemistry, Multidisciplinary
Dinghuai Yang, Linjie Zhao, Jian Cheng, Mingjun Chen, Henan Liu, Jinghe Wang, Chengshun Han, Yazhou Sun
Summary: This study proposes a new method to characterize and suppress SDELs on machined surfaces using a self-designed photo-luminescence detection system. The sub-bandgap energy-level structure containing defect energy levels is unveiled for the first time based on the developed method. The feasibility of the detection method is verified, and the study provides important insights into electronic structures, transition behaviors of electrons, and predicting LIDTs.
Article
Optics
Liang Guo, Hongfei Yin, Lichao Yang, Guangcai Sun, Mengdao Xing, Xiaodong Zeng, Yihua Hu
Summary: The paper proposed a method for processing full-aperture airborne SAL data based on azimuth deramp to improve imaging quality. By estimating the phase error of each sub-aperture and stitching them to obtain the full-aperture phase error, better image resolution and SNR can be achieved.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Environmental Sciences
Ping Guo, Fuen Wu, Shiyang Tang, Chenghao Jiang, Changjie Liu
Summary: This article proposes an automotive video SAR (ViSAR) imaging technique based on sub-aperture spectrum fusion to address the conflict between 2-D high-resolution and real-time requirement in conventional SAR imaging. It analyzes the scene space variation problem caused by close observation distance in automotive SAR and introduces the sub-aperture implementation method, frame rate, and resolution of automotive ViSAR. The improved Range Doppler algorithm (RDA) is used to focus the sub-aperture data, and a sub-aperture stitching strategy is proposed to obtain a high-resolution frame image. Compared to existing ViSAR imaging methods, the proposed method is more efficient, performs better, and is more suitable for automotive ViSAR. The simulation results and actual data of the automotive SAR validate the effectiveness of the proposed method.
Article
Environmental Sciences
Xiuxiao Yuan, Yang Cai, Wei Yuan
Summary: This paper proposes a Voronoi centerline-based seamline network generation method to solve the problem of mosaic holes in low-overlap and irregular orthoimage cases. The method detects the edge vector of the valid orthoimage region, constructs a Voronoi triangle network, and extracts the centerline of the network. Each orthoimage is segmented by the generated centerlines to construct the image effective mosaic polygon. Experimental results demonstrate the superiority of the proposed method in terms of adaptability and effectiveness.
Article
Engineering, Chemical
Mohamed Regaieg, Clement Varloteaux, Titly Farhana Faisal, Zakaria ElAbid
Summary: The representativity and accuracy of digital rock physics (DRP) simulations depend on the size and resolution of the image volume. This paper presents the usage of a super-resolution technique called enhanced super-resolution generative adversarial network (ESRGAN) to generate well-resolved micro-CT images with enhancement factors of x 4 and x 8. The results show that the ESRGAN images provide more accurate pore network extraction and multiphase simulation results compared to highly resolved images.
TRANSPORT IN POROUS MEDIA
(2023)
Article
Computer Science, Artificial Intelligence
Izat Khamiyev, Dias Issa, Zahid Akhtar, M. Fatih Demirci
Summary: A traditional approach using RANSAC algorithm on SIFT correspondences for panoramic image generation is not robust enough for highly varying natural images, and deep learning approach has not been extensively explored. This paper proposes a deep learning model for panoramic image generation and achieves superior results compared to the state-of-the-art SIFT+RANSAC algorithm. A novel panoramic image generation dataset is also introduced.
Article
Engineering, Manufacturing
Negar Ashrafi, Shadi Nazarian, Nicholas Meisel, Jose Pinto Duarte
Summary: AM technologies have been widely used in architecture for rapid prototyping since the early 1990s. This study proposes a shape grammar-based algorithm that incorporates equations for predicting deformation of concrete during printing, and generates compensated toolpaths. The algorithm is validated through printing experiments and has the potential to be extended to other material mixes.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Multidisciplinary
Junichi Kouguchi, Hayato Yoshioka
Summary: A new monitoring method for milling process using signal analysis of acceleration sensors is proposed in this research, which can solve the difficulty in estimating cutting forces for small diameter tools.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Weijie Wang, Yanling Tian, Zhao Zhang, Zhilai Lu, Fujun Wang, Dawei Zhang
Summary: This paper proposes a comprehensive model for predicting the cutting depth and contact area in nanoscratching. The model takes into account the geometric shape of the indenter and elastic recovery, reducing prediction errors. The study also analyzes the influence of the indenter geometry on the contact area, with the face angle of the pyramid identified as a key factor.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Qiaolin Li, Yuki Shimizu, Xiaohao Wang, Xinghui Li, Wei Gao
Summary: This paper introduces a stitching linear scan method for roundness and diameter measurement of small cylinders, using a ruby ball stylus as hardware filtering to eliminate the influence of high-frequency data. Experimental results show that the repeatability of the ruby ball stylus is better than the diamond stylus.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Chaturaporn Kerdkaew, Surasak Kaewpho, Sakchai Chomkokard, Theera Yaemglin, Ittipon Cheowanish, Noparit Jinuntuya, Wiwat Wongkokua
Summary: A new calibration standard for a CMOS-based autocollimator using an optical angle generator with a submillimeter strip reflector (OAG-SSR) is proposed. This method provides angular values along the measuring range of the autocollimator without any mechanical movement, enabling a faster calibration process, which is suitable for integration with production lines.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Haohao Tao, Tongjie Li, Feng Chen, Jinwei Fan, Ri Pan
Summary: In this paper, a novel OTA method is proposed that considers the relationship between tolerance of machine tools' key parts and volumetric error. A volumetric error prediction model is established based on the bridge between geometric error and tolerance. Additionally, a Processing Simplicity Index (PSI) is introduced to replace manufacturing cost and a tolerance-PSI model is established. An OTA model is formulated to minimize volumetric error and maximize PSI. The feasibility and effectiveness of the method are validated through simulations and experiments.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Xiumin Zhang, Jianhua Liu, Huanxiong Xia, Xiaohui Ao, Jiechen Zhou, Zhihao Fu
Summary: A comprehensive finite-element model was developed in this paper to study the evolution of surface figure in high-precision bonded mirrors. The cure kinetics and mechanical behaviors of the optical adhesive were experimentally examined and modeled, and the effects of environmental factors on the surface-figure accuracy and stability were further investigated.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Peng Wang, Bin Chen, Jian Li, Jianwei Wang, Yingjie Zhang, Kai Feng
Summary: This paper proposes an aerostatic bearing with damper modules to suppress vibration on the bearing surface. The stiffness and damping characteristics can be adjusted by changing the thickness of the sheets, resulting in effective vibration suppression.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Lei Yang, Xiaoguang Guo, Renke Kang, Xianglong Zhu, Yufan Jia, Hao Wang
Summary: This paper develops an analytical model that takes into account the pad surface morphology to predict the evolution of the workpiece surface shape. The model considers the cross-scale relationship between the formation of lapped surface shape and the scratching process of a single abrasive grain. The simulated and experimental results validate the correctness and validity of the model, providing new ideas for controlling the workpiece surface.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Gabriele Piscopo, Alessandro Salmi, Eleonora Atzeni
Summary: This paper proposes an artifact for the LP-DED process and evaluates its dimensional accuracy and geometrical tolerances. The findings show that the tolerances of the LP-DED process are comparable to sand casting, lower than LB-PBF technologies, but similar to EB-PBF technologies.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Liang Xue, Ningsong Qu
Summary: This study focuses on the key issues of improving material removal rate and surface quality in macro-electrolyte jet machining. By introducing a novel tool with the rear-end tilted, the current density of the workpiece surface can be increased, leading to improved machining performance. Experimental results show that the tool with a rear-end tilt angle of 15 degrees significantly enhances the material removal rate and reduces surface roughness compared to the standard tool.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Ping Yang, Kaixin Luo, Runxi Wu
Summary: This article proposes a new calibration device to measure the spatial errors of a six-axis serial robot. The device compensates for errors by modifying angles and identifying stiffness parameters, and experiments verify its effectiveness.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Shilei Wu, Mingxiang Ling, Yingbin Wang, Tao Huang
Summary: This paper studies the electromechanical behavior of elliptical APAs by analyzing the multi-domain dynamics of piezoelectric stacks and compliant mechanisms using a novel electro-mechanical transfer matrix method. An analytical electro-elasto transfer matrix of piezoelectric stacks operating at the d33 mode is derived in the form of Taylor's series. The dynamic response spectrum of displacement and impedance for elliptical APAs is accurately captured by this electro-mechanical model, and different topologies of elliptical APAs are compared to suggest the optimal configuration.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Lei Meng, Yusheng Liu, Ying Yan, Dongming Guo, Ping Zhou
Summary: This study explores electrochemically induced chemical etching (ECICE) as a method to achieve nanogram-level, low-cost, stress-free, and stable material removal of fused quartz. The key factors affecting removal minimum and stability are revealed through modeling analysis and testing. A proposed method achieves precision stable removal with satisfactory results at the nanogram level.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Hong Yao, Hai Bi, Junjie Wei, Shuo Zhan, Fangxin Chen, IEEE
Summary: This paper presents a dual-loop control syringe-based picoliter-scale injection system for high-precision microinjection. The system utilizes an inner pneumatic servo loop and an outer position servo loop to achieve precise control. The experimental results demonstrate that the system can regulate the smallest droplet size to within 0.25 pL.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)
Article
Engineering, Multidisciplinary
Jinchun Yuan, Jiasheng Li, Ye Ding
Summary: In this paper, a simple and effective internal model control (IMC) system is proposed to attenuate thrust ripples in ultraprecision air-bearing linear feed systems, based on a modified modeling and identification method of permanent magnet linear synchronous motors (PMLSMs). The performance of the proposed method in overcoming nonlinearity and achieving smooth velocities in steady states is demonstrated through analysis and experiments.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2024)