Journal of Mechanical Science and Technology最新文献_第2页

Optimal design of gyroid solid-TPMS structures for 8-inch wafer prober lower chuck in additive manufacturing 为增材制造中的 8 英寸晶圆探测仪下卡盘优化设计陀螺固体-TPMS 结构

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-2410-0

Kunwoo Kim, Sohyun Park, Seungyeop Lee, Siyeon Gu, Hyungug Jung, Jaewook Lee

引用次数: 0

Multimodal conversion of a magnetic navigated dual-hemisphere capsule robot based on self-standing characteristics 基于自立特性的磁导航双半球胶囊机器人的多模态转换

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-0842-1

Xu Liu, Yongshun Zhang, Zhenhu Liu

{"title":"Multimodal conversion of a magnetic navigated dual-hemisphere capsule robot based on self-standing characteristics","authors":"Xu Liu, Yongshun Zhang, Zhenhu Liu","doi":"10.1007/s12206-024-0842-1","DOIUrl":"https://doi.org/10.1007/s12206-024-0842-1","url":null,"abstract":"Capsules applied in large-volume and unstructured organs, such as stomach and colon, should perform multimodal motion to effectively accomplish gastrointestinal tract diagnosis. For this purpose, a magnetic navigated dual-hemisphere capsule robot (DHCR) actuated by the spatial universal rotating magnetic field (SURMF) is proposed, utilizing its passive and active modes for fixed-point posture adjustment and rolling locomotion, respectively. The DHCR exhibits a distinctive physical property—self-standing characteristics, which can specify vertically upward orientation as the starting posture and benchmark for multimodal motion after the DHCR undergoes complex multimodal (pseudo-active, active, and passive modes) conversion. On the basis of the momentum moment theorem, a general dynamic model is devised to reveal the mechanism of multimodal transition through stability and posture response. Results show that the DHCR can flip spontaneously after applying SURMF and is finally in a stable passive mode with the vertically upward DHCR axis. Finally, the multimodal conversion of the DHCR is tested in turning navigation within the curved intestine, providing a new method of endoscopic diagnosis.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tool wear classification based on minimalism in deep learning for VanillaNet and recurrence plot encoding technology 基于 VanillaNet 深度学习极简主义的刀具磨损分类和递归图编码技术

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-0815-4

Shuqiang Wang, Jiawen Tian

{"title":"Tool wear classification based on minimalism in deep learning for VanillaNet and recurrence plot encoding technology","authors":"Shuqiang Wang, Jiawen Tian","doi":"10.1007/s12206-024-0815-4","DOIUrl":"https://doi.org/10.1007/s12206-024-0815-4","url":null,"abstract":"Accurate tool wear state identification models are essential to ensure manufacturing reliability and efficiency. Tool wear state recognition systems establish a mapping relationship with the tool state by extracting signal features. Therefore, this paper proposes an architecture for identifying the actual wear state of data unbalanced machining tools by applying the power of minimalism in deep learning networks, namely, VanillaNet, combined with recurrence plot encoding technology (RP). In this paper, the signal is preprocessed by RP, and the nonlinear one-dimensional time-sequential digital signal embedded in variable time-lag delay coordinate space in the phase space is converted into a two-dimensional (2D) color texture image, thereby achieving the feature extraction of tool wear. Then, the data-enhanced 2D recurrence coded image is used as the input to VanillaNet, and its minimalist network architecture is applied to establish the mapping relationship between tool wear states and wear features. This process reduces the state recognition time and achieves the fast recognition of tool wear states. The model in this paper achieves more than 95 % on all four classification metrics: accuracy, recall, F1 score, and precision in three sets of crossover experiments while reducing misclassification in the sharp wear phase. The proposed model also outperforms three DL-based methods, namely, CNN-Attention, AlexNet, and ResNet.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generative models for tabular data: A review 表格数据的生成模型：综述

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-0835-0

Dong-Keon Kim, DongHeum Ryu, Yongbin Lee, Dong-Hoon Choi

{"title":"Generative models for tabular data: A review","authors":"Dong-Keon Kim, DongHeum Ryu, Yongbin Lee, Dong-Hoon Choi","doi":"10.1007/s12206-024-0835-0","DOIUrl":"https://doi.org/10.1007/s12206-024-0835-0","url":null,"abstract":"Generative design refers to a methodology that not only simulates the characteristics of a given data or system but also creates artificial data for various purposes. It’s a significant research area encompassing diverse issues such as privacy preservation, data distribution analysis, and the development of surrogate models. Initially, research in this field primarily employed stochastic models or basic machine learning methods. However, with the advancement of deep learning technology, numerous studies have emerged, showcasing developed mechanisms using artificial neural network-based methods like variational autoencoders (VAEs) and generative adversarial networks (GANs). These studies extend across different data types, including images and texts, tailored to specific objectives. This paper presents a systematic review of generative design research focused on tabular data. We begin by elucidating the characteristics of tabular data within generative design, followed by a discussion on the goals and challenges in this area. Subsequently, the paper introduces various generative design studies on tabular data, categorized according to their methodological development and unique objectives. Finally, we address the benchmark methods used in generative design for tabular and how their performance is evaluated.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142198845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Mask R-CNN based process monitoring system for fabricating high density ceramic parts using photo-polymerization 基于掩模 R-CNN 的工艺监控系统，用于利用光聚合技术制造高密度陶瓷部件

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-2411-z

Seungjae Han, Seung-Kyum Choi, Hae-Jin Choi

引用次数: 0

Study of surface roughness change of AlSi10Mg based on selective laser melting (SLM) using electro-polishing technique 使用电抛光技术研究基于选择性激光熔融 (SLM) 的 AlSi10Mg 表面粗糙度变化

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-2412-y

Je-Un Jeong, Kwang-Kyu Lee, Dong-Gyu Ahn, Jeong-Won Lee

引用次数: 0

TFARNet: A novel dynamic adaptive time-frequency attention residual network for rotating machinery intelligent health prediction TFARNet：用于旋转机械智能健康预测的新型动态自适应时频注意残差网络

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0802-9

Lin Song, Jun Wu, Liping Wang, Jianhong Liang, Guo Chen, Liming Wan, Dan Zhou

{"title":"TFARNet: A novel dynamic adaptive time-frequency attention residual network for rotating machinery intelligent health prediction","authors":"Lin Song, Jun Wu, Liping Wang, Jianhong Liang, Guo Chen, Liming Wan, Dan Zhou","doi":"10.1007/s12206-024-0802-9","DOIUrl":"https://doi.org/10.1007/s12206-024-0802-9","url":null,"abstract":"Rotating machinery is critical functional part of industrial mechanical equipment, and health status of rotating machinery is closely related to equipment stability, reliability and safety. Vibration signals for health prediction are often collected under operating conditions with variable loads and speeds, which makes health prediction more challenging. STFT-based time-frequency representation methods are widely used for the health prediction of rotating machinery. However, these methods lack specific learning mechanisms to effectively distinguish the time-frequency representations at different time points and frequency bands and highlight important feature information. To vanquish the weakness, this paper develops a novel dynamic adaptive time-frequency attention residual network (TFARNet) for rotating machinery intelligent health prediction. Firstly, a new adaptive STFT time-frequency attention (TFA) unit is developed to recalibrate time-frequency features, thereby enhancing important information and suppressing redundant information. Secondly, the TFA unit is inserted into the residual network, by stacking multiple residual blocks and TFA units to establish TFARNet and efficiently learn more discriminative features. Thirdly, label smoothing regularization and dynamic learning rate are employed to accelerate model convergence and optimize the model training process. Finally, three cases are carried out to evaluate the developed method. Compared with the other seven health prediction methods, the developed method can achieve higher prediction accuracy.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a nonlinear thermal equivalent circuit model for the digital valve with integrated multiple coils 为集成多线圈的数字阀开发非线性热等效电路模型

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0843-0

Shuai Huang, Ye Lin, Haocheng Xu, Hua Zhou

{"title":"Development of a nonlinear thermal equivalent circuit model for the digital valve with integrated multiple coils","authors":"Shuai Huang, Ye Lin, Haocheng Xu, Hua Zhou","doi":"10.1007/s12206-024-0843-0","DOIUrl":"https://doi.org/10.1007/s12206-024-0843-0","url":null,"abstract":"For the development of a digital valve, modularization, miniaturization, and low-temperature rise are crucial factors that need to be balanced against each other. A digital valve with integrated multiple coils based on a rectangular section magnetic sleeve is proposed to improve performance. To predicate the thermal performance of the proposed digital valve accurately and rapidly, a nonlinear thermal equivalent circuit (NTEC) model was developed. The most significant distinction of this model is its consideration of the changes in convective thermal resistance based on the operating temperature and installation state. This model has been derived and evaluated by simulation and experiments. The experiment results show that the temperature responses of four key test types obtained from the NTEC model have fairly good correspondence with to those from the experiment and the maximum temperature rise deviation is below 17 %. Finally, a comparison study with a C-type sleeve is demonstrated, indicating that the maximum temperature decline of the coil is 26.1 °C under a vertical state.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of non-contact finger seal force based on deformation of the finger pad 基于指垫变形的非接触式手指密封力分析

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0809-2

Yuan Wei, Bowen Ma, Xiangyan Chen, Fanyi Xu, Jia Guo, Shulin Liu, Wei Dou

{"title":"Analysis of non-contact finger seal force based on deformation of the finger pad","authors":"Yuan Wei, Bowen Ma, Xiangyan Chen, Fanyi Xu, Jia Guo, Shulin Liu, Wei Dou","doi":"10.1007/s12206-024-0809-2","DOIUrl":"https://doi.org/10.1007/s12206-024-0809-2","url":null,"abstract":"As a type of flexible seal, finger seal has attracted wide attention due to its low cost and leakage rate. Its potential in engineering applications has been demonstrated by numerous experiments. The deformation of the pad under load during the operation of non-contact finger seal is a critical factor that limits the performance. To investigate the change of the seal force of finger beams and pads, it has been focused on the non-contact finger seal, and the force on low-pressure finger beam has been simulated and analyzed. By differentiating the force acting on finger pad, the simulation on different regions of the finger pad has been considered. The seal force distribution coefficient has been introduced, the results are unified to obtain the final seal force, and its rationality is verified by comparing it with existing results. Subsequently, the relationship between pressure drop, eccentricity, rotor speed, friction coefficient, finger pad size, and finger seal force is explored. It has demonstrated that, at the same eccentricity, the seal force decreases as the pressure difference increases. A larger eccentricity leads to better seal performance. Additionally, it has been observed that the size of the finger pad affects seal force of the beam. Specifically, an increase in the axial dimension of the pad results in a larger force. Through the analysis of the resultant force on the rotor on the whole ring finger seal, the result is closer to the engineering project. The deformation of finger pad is studied, and the stress on pad is analyzed by analytical method, which lays a foundation for further study of finger seal performance.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-objective optimization and fracture analysis of laser weld joints of Ni-Cr superalloy 80 A for gas turbine components 用于燃气轮机部件的镍铬超合金 80 A 激光焊接接头的多目标优化和断裂分析

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-04 DOI: 10.1007/s12206-024-0822-5

Suman Kumar Saurabh, Prabha Chand, Umacharan Singh Yadav

引用次数: 0