Review
Mechanics
Xiaoliang Ma, Liping Shi, Lin Yang, Jian Yi, Bo Wang, Mingwei Li, Bing Zheng, Chengyu Hou, Lin Ye, Yesheng Zhong, Xiaodong He
Summary: Recently synthesized diamond composites with interfaced polytypes, nanograins, and nanotwins exhibit exceptional fracture toughness. Layer defects with enlarged interlayer distances and substantial sp2 bonding are commonly observed in such composites. Molecular dynamics simulations demonstrate that twin boundaries and phase boundaries have limited effect on the toughening of the diamond composite, while a diamond toughening mechanism that introduces layer defects to inhibit crack propagation and reduce crack tip stress intensity is verified.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Green & Sustainable Science & Technology
Jianguo Zhang, Andreas Rosenkranz, Junjie Zhang, Jiang Guo, Xiaoqing Li, Xiao Chen, Junfeng Xiao, Jianfeng Xu
Summary: Hardened steel is an important material in modern industry, and modifying its wettability through micro/nano structuring is crucial for enhancing adhesion strength and resistance to corrosion and wear under extreme conditions. The feasibility of micro/nano sculpturing of hardened steels using elliptical vibration diamond cutting is presented in this study, with optimal structural parameters identified to increase the hydrophobicity of textured steel.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2022)
Review
Materials Science, Multidisciplinary
Panfeng Wang, Jin Xuan, Ronghao Zhang, Hao Zhang, Qiang Wang, Haoyang Wang, Houli Liu, Li Zhang
Summary: This article discusses how enhancing mass transfer through nature-inspired channels and hierarchical pores, as well as controlling them through additive manufacturing, can improve energy efficiency and reaction rates in various applications. It also highlights the advantages and applications of these methods in adsorption, chemical reactions, and electrochemical energy storage.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Se-Chang Kim, Seong-Yeong Heo, Gun-Woo Oh, Pathum Chandika, Won Sun Park, Il- Whan Choi, Won-Kyo Jung
Summary: This study evaluated the effects of Spirulina maxima-derived phycocyanin (PC) on bone cells and developed a hierarchically structured fibrous membrane loaded with PC. The results showed that the fibrous membrane exhibited excellent biocompatibility and enhanced bone tissue regeneration.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Engineering, Mechanical
Yang Wu, Ning He, Ni Chen, Julian Polte, Bo Yan, Liang Li, Eckart Uhlmann
Summary: In this study, a hybrid machining technique called laser-assisted precision grinding was proposed to fabricate extremely sharp cutting edges for ultra-hard micro mills. The laser heat model showed that with suitable heat conduction, cobalt binder could absorb photon energy and heat itself, resulting in uniform graphitisation and cobalt oxidation on the cut section. This allowed for easy grinding of the affected layer using a low grinding load. Micro-abrasion was used to remove the diamond without any cracks or dislodgement, and optimizing the abrasive grain size achieved superior ground surface quality. The fabricated PCD micro end mills showed superior sharpness compared to previously reported end mills, and demonstrated excellent cutting performance on copper material.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Engineering, Mechanical
Zhenfei Guo, Bing Guo, Qingliang Zhao, Zhaoqi Zeng, Lei Xu
Summary: The wear characteristics of micro-structured CVD-D grinding tools were studied and compared with micro-structured CGDE and FGDMB grinding tools. The results showed that the micro-structured CVD-D tools had better wear resistance, higher grinding ratio, and lower grinding force. The wear form of the CVD-D tools was the shedding of the coating at the edge of the micro-structure, without graphitization wear observed.
Article
Automation & Control Systems
Guilin Zhuang, Wenjun Zong, Yifu Tang
Summary: This study shows that minimum quantity lubrication (MQL) can reduce cutting temperature and tool wear. Low viscosity cutting fluid helps wetting at the tool-chip contact interface, reducing friction. MQL can also slow down the graphitization of diamond, effectively reducing tool wear.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Canbin Zhang, Chi Fai Cheung, Xiaoliang Liang, Benjamin Bulla
Summary: This paper demonstrates the successful fabrication of microlens arrays on steel mould using high-frequency ultrasonic vibration-assisted sculpturing (HFUVAS) with a smoothed tool path. The results show that relative tool-work displacement can be effectively reduced by using a smoothed tool path, resulting in improved machining accuracy and surface quality. Additionally, quadrilateral and hexagonal microlens arrays are also successfully fabricated, achieving a form error within 1μm and a surface roughness (Sa) below 10nm.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Engineering, Industrial
Jianfei Jia, Bing Guo, Qinghe Zhang, Zhongbo Zhang, Zhenfei Guo, Qingyu Meng, Qingliang Zhao, Quanli Zhang, Zhaoqi Zeng
Summary: Micro-fabrication has become increasingly significant in aerospace, biomedicine, and other industries. Due to its excellent wear resistance, CVD diamond shows great potential in the production of micro-grinding tools. This study demonstrates that the structured CVD diamond micro-grinding tool exhibits superior machining precision and wear resistance based on surface roughness and burr size analysis after machining. Moreover, analysis of force signals reveals that the structured CVD diamond micro-grinding tool reduces the axial force by 20% and the radial force by 10%, indicating higher cutting efficiency. Furthermore, through time domain analysis, the relationship between acoustic emission signal characteristics and surface roughness is established. By employing wavelet transform and machine learning, the wear degree of common and structured CVD diamond micro-grinding tools is accurately predicted with a success rate over 99%.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Materials Science, Coatings & Films
Wentao Yu, Huachun Wang, Ruixue Sun, Kezheng Chen
Summary: A novel micro-nano hierarchically structured fluoridated hydroxyapatite (FHAp) coating was successfully synthesized on an AZ31B substrate using a simple one-step electrochemical deposition method in this study. The FHAp coating exhibited higher anti-corrosion properties and better cell biocompatibility compared to pure HAp coating, due to the addition of fluorine ion. This work provides a simple, environment-friendly, and efficient way to prepare FHAp coating on AZ31B alloy with improved corrosion resistance and biocompatibility.
SURFACE ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Bo Zhou, Yang Tang, Zhiwei Jiao, Pingyu Wan, Qing Hu, Xiao Jin Yang
Summary: In this study, a three-dimensional self-supporting NiFe electrode with excellent OER activity and stability was prepared by direct writing 3D printing. The electrode showed a low overpotential and high activity for OER, making it suitable for green hydrogen production through water electrolysis.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Industrial
Hanzhong Liu, Wenjun Zong, Zhipeng Cui
Summary: This study established a strength distribution model for micro diamond tools considering diamond anisotropy and chip flow direction. The comprehensive wear resistances of micro diamond tools with different crystal orientation combinations were analyzed based on the model. The wear prone areas of different tools were successfully predicted. Additionally, the evolution processes of sharpness and wear topography were monitored, and the morphologies, profile errors, and topological characteristics of the micro-structures machined with different micro diamond tools were analyzed.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Hanheng Du, Mengnan Jiang, Zuankai Wang, Zhiwei Zhu, Suet To
Summary: This study proposed a machining process to generate micro/nanostructures on magnesium alloy surfaces. The study successfully generated various microstructures and sawtooth-shaped nanostructures on the surfaces, demonstrating the effectiveness of the proposed process.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Biophysics
Wentao Liu, Luxin Liang, Bo Liu, Dapeng Zhao, Yingtao Tian, Qianli Huang, Hong Wu
Summary: This study demonstrated the significant impact of micro/nano-structured Ti surfaces on the morphology and function of macrophages, as well as their ability to polarize macrophages towards the M2 phenotype, promote osteoblast maturation, and exhibit strong anti-inflammatory and osteo-immunomodulatory effects. Introducing micro/nano-topographies onto Ti-based implant surfaces has promising potential to regulate inflammatory responses and mediate osteogenesis.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Engineering, Electrical & Electronic
Yang Yang, Yu Chen, Chenyang Zhao
Summary: A novel ultra-precision diamond cutting process based on tool trapezoidal modulation is proposed for the first time in this paper to investigate the brittle-ductile transition (BDT) characteristics of KDP crystals. The BDT depth is significantly increased compared to conventional ultra-precision diamond cutting, providing a new strategy for enhancing the machining performance of KDP crystals and potentially extending to other brittle optical crystals.
Article
Engineering, Chemical
Yexiang Fu, Fuwang Zhao, Zejia Zhao, Hui Tang, Suet To, Ching-Hsiang Cheng
Summary: This study reports a method that combines hydrothermal synthesis with ultraprecision machining to fabricate a hierarchical coated surface, improving its hydrophobicity. The experimental results show that the hierarchical surface has a larger contact angle and better water droplet bouncing behavior, indicating excellent water repellency.
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Wai Sze Yip, Suet To
Summary: This study combines social network analysis (SNA) and principal component analysis (PCA) to prioritize Ultra-precision machining (UPM) factors based on their combined characteristics. It uses SNA results as input for PCA to generate principal components, which are then combined into multiple characteristic performance indexes (MPCI). Few case studies validate the effectiveness of adjustments in UPM factors with high MPCI on machining outcomes. The study contributes to providing a comprehensive reference for prioritizing UPM factors and developing practical machining strategies.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
Article
Chemistry, Physical
Dan Xu, Hong Zhong, Mitch Guijun Li, Sandy Suet, Lin Lu
Summary: Solar-driven steam generation is an attractive solution to the freshwater and energy crisis, utilizing abundant solar energy and undrinkable water resources with low environmental impact. To achieve practical solar evaporation, efficient solar absorbers with broad spectrum response, high heat conversion, low cost, and stability are crucial. Additionally, preventing salt crystal accumulation on the evaporation surface is vital for maintaining long-term evaporation efficiency.
Article
Engineering, Manufacturing
Zi-Hui Zhu, Peng Huang, Suet To, Li-Min Zhu, Zhiwei Zhu
Summary: A fast-tool-servo-controlled shear-thickening micropolishing method is proposed for removing undesired surface diffraction on diamond-turned microstructured surfaces. The method allows for controllable material removal by adjusting the gap width and achieves improved surface quality.
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
(2023)
Article
Materials Science, Multidisciplinary
Zhuoxuan Zhuang, Hanheng Du, Wai Sze Yip, Tengfei Yin, Zejia Zhao, Zhiwei Zhu, Suet To
Summary: In this study, a novel micro and nano-cutting device with complex-axis is developed to overcome the challenge of generating multi-scale cutting motions with high accuracy. The device consists of a customized designed linear voice coil motor and a piezoelectric actuated flexure-hinge mechanism. The device has been optimized using magnetic field simulation and validated through experiments using a force sensor, and it can generate microstructures with high accuracy and flexibility in ultraprecision machining.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Hanheng Du, Zhiwei Zhu, Zuankai Wang, Suet To
Summary: This study proposes a novel piezoelectrically actuated cutting system for fabricating high-aspect-ratio and hierarchical micro/nanostructure arrays. The mechanical structure is designed based on the circular flexure hinge, and a finite element model is established to analyze its resonant frequencies and mode shapes. The effectiveness and flexibility of the proposed cutting system are demonstrated by fabricating micro/nanostructure arrays with varying features.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Analytical
Xin Li, Yinggang Wang, Hongyu Chen, Wenhong Zhao, Qianfa Deng, Tengfei Yin, Suet To, Zhe Sun, Xi Shen, Wei Hang, Julong Yuan
Summary: In this study, polyurethane, damping cloth, and non-woven fabric were selected as polishing pads. The HPMJ conditioning technology was found to be better than traditional diamond conditioning in terms of keeping the polishing pad surface clean and preventing the hole structure from being blocked. Additionally, the HPMJ conditioned polishing pad had a longer service life and a more stable material removal rate.
Article
Engineering, Manufacturing
Zhanwen Sun, Sujuan Wang, Suet To, Shijun Xu, Guangyu Guo
Summary: Ultra-precision diamond cutting is a promising method for fabricating precision parts of titanium alloys. This study proposes an analytical specific cutting energy (SCE) model that takes into account various factors such as material microstructures, spring back, size effect, cutting edge effect, temperature evolution, and tool-chip frictional states. The results show that the cutting edge effect and spring back contribute to a high SCE at small undeformed chip thickness. The study also suggests an energy-oriented machining parameters optimization method to minimize the SCE in UPDC of titanium alloys.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Automation & Control Systems
Peizheng Li, Sujuan Wang, Suet To, Zhanwen Sun, Jie Jiao, Shijun Xu
Summary: This study proposes a semi-ductile diamond milling method that can produce high-quality microstructured surfaces with high efficiency by fully considering the curvature variation, microstructure geometry characteristics, and machining parameters. By establishing a semi-ductile machining model and the relationship between machining parameters and fragmentation length, determining the dynamically changing tool trajectory, and conducting a comparison experiment, it is demonstrated that the method has high quality and efficiency in creating microstructures on hard and brittle materials.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Changlin Liu, Suet To, Xuexiang Sheng, Jianfeng Xu
Summary: This paper explores the formation mechanism of crystal defects in single-crystal silicon during elliptical vibration cutting (EVC) using molecular dynamics simulation. The study finds that the cutting stage in EVC greatly influences the surface morphology, including elastic recovery and side flow. The preferred slip motion during subsurface damage formation is distinct in the extrusion and shear stage. The influence of cutting temperature and speed on crystal defects formation is also investigated, revealing the increase in proportion of Shockley partial dislocations at elevated temperature and the suppression of crystal defects generation with higher speed ratio.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
C. H. Wong, E. A. Buntov, W. S. Yip, S. To, M. B. Guseva, A. F. Zatsepin
Summary: Through Monte Carlo simulation, we investigated the kink structures in free-standing carbon nanowires under high temperatures. Our study found that short carbon chains exhibit disordered kink structures at high temperatures, which may enhance the chemisorption of negatively charged atoms and provide important insights for the development of high-temperature chemisorption materials.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Manufacturing
Pan Guo, Mingyu Liu, Yuanping Zhou, Zhiwen Xiong, Shaojian Zhang, Suet To
Summary: In ultra-precision machining of micro-structured functional surfaces, tool servo dynamic errors, namely tool servo tracking error and tool servo induced vibration, have negative impacts on surface quality. The study reveals two crucial suggestions for improving surface quality: firstly, the tool path should be at least fourth-order differentiable; secondly, the second-order derivative of tool path (required acceleration) should be less than the rated acceleration provided by the tool servo.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Automation & Control Systems
Yan-Ning Fang, Xiaonan Pu, Suet To, Bernard Hon, Li-Min Zhu, Zhiwei Zhu
Summary: To overcome the limitations of current piezo-actuated triaxial fast tool servos (FTSs), a novel normal-stressed electromagnetic triaxial FTS with a compact structure and high resonant frequency is proposed. It achieves triaxial motions in the range of hundreds of micrometers and utilizes a single armature for decoupled and noncontact driving forces. The prototype of the triaxial FTS shows excellent agreement with the design target in terms of static and dynamic performances. The system is further enhanced with a linear active disturbance rejection control and an iterative learning scheme for fast and accurate trajectory tracking. By fabricating a hexagonal spherical microlens array, the triaxial FTS demonstrates its capability with a high level of spatial accuracy and good surface quality.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Changlin Liu, Wai Sze Yip, Suet To, Bolong Chen, Jianfeng Xu
Summary: This article investigates the deformation mechanisms of CdTe during nano-grinding through molecular dynamics (MD) simulation. The results show that the dominant grinding mechanism changes from elastic deformation to ploughing and cutting as the grinding depth increases. The grain size affects the transition from ploughing to cutting and the generation of subsurface damage and dislocations.
Article
Engineering, Chemical
Louis Luo Fan, Wai Sze Yip, Zhanwan Sun, Baolong Zhang, Suet To
Summary: This study investigates the effect of substrate-to-filament distances on coating thickness, diamond purity, coating grain size, and ZrO2 machining performance during HFCVD. The results indicate that smaller substrate-to-filament distances lead to decreased grain size and coating thickness, resulting in improved machining quality for diamond-coated milling tools.
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)
