Pub Date : 2026-01-01Epub Date: 2026-01-19DOI: 10.1007/s41871-025-00282-9
Xiuyuan Chen, Xichun Luo, Wenkun Xie, Yankang Tian, Song Yang
Microvibrations caused by airflow self-excitation within pressurized air films significantly degrade the dynamic stability of aerostatic bearings. However, effectively controlling supersonic flow velocity, which is critical for suppressing the turbulent airflows that cause this self-excitation, remains a significant challenge in the current designs of aerostatic bearings. To address this gap, a novel aerostatic restrictor inspired by the Laval nozzle principle is proposed to enhance the dynamic stability of bearings by decelerating supersonic pressurized airflows. Computational fluid dynamics (CFD) simulations are conducted to elucidate the underlying mechanism by which the proposed restrictor improves performance (i.e., by suppressing turbulent airflows by mitigating adverse pressure gradients). On the basis of the CFD simulation results, the key geometrical parameters of the newly designed restrictor are identified. The effectiveness of the proposed restrictor is evaluated through experimental testing, with the results indicating that it achieves improved dynamic stability and reduced vibration amplitude compared with a conventional aerostatic restrictor design. This work is expected to advance the theory of restrictor design by enhancing the dynamic stability of aerostatic bearings.
{"title":"Innovative Design of Aerostatic Bearings with Enhanced Dynamic Stability Inspired by the Laval Nozzle Principle.","authors":"Xiuyuan Chen, Xichun Luo, Wenkun Xie, Yankang Tian, Song Yang","doi":"10.1007/s41871-025-00282-9","DOIUrl":"https://doi.org/10.1007/s41871-025-00282-9","url":null,"abstract":"<p><p>Microvibrations caused by airflow self-excitation within pressurized air films significantly degrade the dynamic stability of aerostatic bearings. However, effectively controlling supersonic flow velocity, which is critical for suppressing the turbulent airflows that cause this self-excitation, remains a significant challenge in the current designs of aerostatic bearings. To address this gap, a novel aerostatic restrictor inspired by the Laval nozzle principle is proposed to enhance the dynamic stability of bearings by decelerating supersonic pressurized airflows. Computational fluid dynamics (CFD) simulations are conducted to elucidate the underlying mechanism by which the proposed restrictor improves performance (i.e., by suppressing turbulent airflows by mitigating adverse pressure gradients). On the basis of the CFD simulation results, the key geometrical parameters of the newly designed restrictor are identified. The effectiveness of the proposed restrictor is evaluated through experimental testing, with the results indicating that it achieves improved dynamic stability and reduced vibration amplitude compared with a conventional aerostatic restrictor design. This work is expected to advance the theory of restrictor design by enhancing the dynamic stability of aerostatic bearings.</p>","PeriodicalId":52345,"journal":{"name":"Nanomanufacturing and Metrology","volume":"9 1","pages":"2"},"PeriodicalIF":4.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12816101/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146020693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01Epub Date: 2025-06-30DOI: 10.1007/s41871-025-00257-w
Claudia Niehaves, Andreas Tausendfreund, Yasmine Bouraoui, Yang Lu, Tim Radel, Andreas Fischer
Laser chemical machining (LCM) is a gentle metal removal technique with micrometer resolution. LCM involves laser-driven surface heating of the workpiece, which is subjected to a flowing acid bath, locally inducing a chemical dissolution reaction. To ensure a high machining quality, the laser power is intentionally limited to avoid disturbances in material removal presumably caused by the shielding effect of boiling bubbles. To achieve both an increased removal rate and a high removal quality, the current understanding of surface removal mechanisms must be fundamentally expanded. Therefore, to create the basis of near-process quality control in the future, a near-process measurement approach is needed for the machined workpiece geometry inside the machine and the temperature in the process fluid as an important process quantity. This study introduces a fluorescence-based measurement approach capable of assessing both quantities in-situ. An experimental feasibility study demonstrated the robustness of the approach in measuring the three-dimensional geometry of a structure produced by LCM, even in the presence of streaming air bubbles in the optical path, thereby validating its near-process capability. However, systematic measurement errors, such as edge artifacts, were observed in the geometry measurements, indicating the need for a revision of the signal model. In addition, precise temperature measurements of the electrolyte solution within the LCM environment were achieved, with a random error of and a systematic error of .
{"title":"Fluorescence-Based Measurement of Workpiece Geometry and Temperature in Laser Chemical Machining.","authors":"Claudia Niehaves, Andreas Tausendfreund, Yasmine Bouraoui, Yang Lu, Tim Radel, Andreas Fischer","doi":"10.1007/s41871-025-00257-w","DOIUrl":"10.1007/s41871-025-00257-w","url":null,"abstract":"<p><p>Laser chemical machining (LCM) is a gentle metal removal technique with micrometer resolution. LCM involves laser-driven surface heating of the workpiece, which is subjected to a flowing acid bath, locally inducing a chemical dissolution reaction. To ensure a high machining quality, the laser power is intentionally limited to avoid disturbances in material removal presumably caused by the shielding effect of boiling bubbles. To achieve both an increased removal rate and a high removal quality, the current understanding of surface removal mechanisms must be fundamentally expanded. Therefore, to create the basis of near-process quality control in the future, a near-process measurement approach is needed for the machined workpiece geometry inside the machine and the temperature in the process fluid as an important process quantity. This study introduces a fluorescence-based measurement approach capable of assessing both quantities in-situ. An experimental feasibility study demonstrated the robustness of the approach in measuring the three-dimensional geometry of a structure produced by LCM, even in the presence of streaming air bubbles in the optical path, thereby validating its near-process capability. However, systematic measurement errors, such as edge artifacts, were observed in the geometry measurements, indicating the need for a revision of the signal model. In addition, precise temperature measurements of the electrolyte solution within the LCM environment were achieved, with a random error of <math><mrow><mn>1</mn> <mmultiscripts><mspace></mspace> <mrow></mrow> <mo>∘</mo></mmultiscripts> <mtext>C</mtext></mrow> </math> and a systematic error of <math><mrow><mn>1.4</mn> <mmultiscripts><mspace></mspace> <mrow></mrow> <mo>∘</mo></mmultiscripts> <mtext>C</mtext></mrow> </math> .</p>","PeriodicalId":52345,"journal":{"name":"Nanomanufacturing and Metrology","volume":"8 1","pages":"17"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12209384/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144555690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-04DOI: 10.1007/s41871-024-00233-w
Y. Guan, Shozo Masui, S. Kadoya, M. Michihata, Satoru Takahashi
{"title":"Super-Resolution by Localized Plasmonic Structured Illumination Microscopy Using Self-Assembled Nanoparticle Substrates","authors":"Y. Guan, Shozo Masui, S. Kadoya, M. Michihata, Satoru Takahashi","doi":"10.1007/s41871-024-00233-w","DOIUrl":"https://doi.org/10.1007/s41871-024-00233-w","url":null,"abstract":"","PeriodicalId":52345,"journal":{"name":"Nanomanufacturing and Metrology","volume":"81 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141268125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-15DOI: 10.1007/s41871-024-00232-x
Motoya Yoshikawa, Saeko Fujii, S. Kadoya, Tatsuya Sugihara, M. Michihata, Satoru Takahashi
{"title":"Fluorescence-Based Calibration Model for In-Situ Measurement of Micro-scaled Lubricant Thickness Distribution at Indentation Interface","authors":"Motoya Yoshikawa, Saeko Fujii, S. Kadoya, Tatsuya Sugihara, M. Michihata, Satoru Takahashi","doi":"10.1007/s41871-024-00232-x","DOIUrl":"https://doi.org/10.1007/s41871-024-00232-x","url":null,"abstract":"","PeriodicalId":52345,"journal":{"name":"Nanomanufacturing and Metrology","volume":"13 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140974395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-16DOI: 10.1007/s41871-024-00229-6
Johannes Degenhardt, Mohammed Wassim Bounaim, Nan Deng, Rainer Tutsch, Gaoliang Dai
{"title":"A New Kind of Atomic Force Microscopy Scan Control Enabled by Artificial Intelligence: Concept for Achieving Tip and Sample Safety Through Asymmetric Control","authors":"Johannes Degenhardt, Mohammed Wassim Bounaim, Nan Deng, Rainer Tutsch, Gaoliang Dai","doi":"10.1007/s41871-024-00229-6","DOIUrl":"https://doi.org/10.1007/s41871-024-00229-6","url":null,"abstract":"","PeriodicalId":52345,"journal":{"name":"Nanomanufacturing and Metrology","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140698525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-03DOI: 10.1007/s41871-024-00226-9
Chuan Tang, Lei Chen, Linmao Qian
{"title":"Influence of Film Thickness on Nanofabrication of Graphene Oxide","authors":"Chuan Tang, Lei Chen, Linmao Qian","doi":"10.1007/s41871-024-00226-9","DOIUrl":"https://doi.org/10.1007/s41871-024-00226-9","url":null,"abstract":"","PeriodicalId":52345,"journal":{"name":"Nanomanufacturing and Metrology","volume":"7 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140748258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号