Zenggui Gao , Jingwei Tang , Hongjiang Lu , Yuyan Yao , Xinjie Cao , Chunyang Yu , Lilan Liu
{"title":"A dynamic task allocation framework for human-robot collaborative assembly based on digital twin and IGA-TS","authors":"Zenggui Gao , Jingwei Tang , Hongjiang Lu , Yuyan Yao , Xinjie Cao , Chunyang Yu , Lilan Liu","doi":"10.1016/j.jmsy.2025.02.014","DOIUrl":"10.1016/j.jmsy.2025.02.014","url":null,"abstract":"<div><div>Human-robot collaborative assembly is recognized as an essential component of intelligent manufacturing systems, combining human flexibility with machine efficiency, thereby enhancing the effectiveness and adaptability of assembly tasks. However, challenge in adaptability, decision-making, and responsiveness to changing scenarios persist. To address these, this paper propose a digital twin-driven decision-making approach for task allocation, using an Improved Genetic Algorithm with Tabu Search (IGA-TS). First, an assembly task evaluation model and digital twin framework are developed to support dynamic decision-making. Subsequently, the IGA-TS algorithm integrates a custom encoding scheme, fitness function, tabu list, and neighborhood search to avoid local optima, enhancing global optimization and convergence speed. Lastly, a digital twin-assisted system, combining human body modeling and motion recognition, enables real-time optimization feedback, forming a closed-loop for collaboration. Experimental results show that IGA-TS outperforms traditional genetic algorithms and heuristic methods in multi-objective optimization, reducing assembly time, task complexity, and human workload. In addition, the designed digital twin system demonstrates strong adaptability and robustness in responding to dynamic changes during the assembly process, providing a practical and feasible solution for manufacturing workshop assembly. It significantly enhances production efficiency and product quality, offering substantial industrial application value.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"80 ","pages":"Pages 206-223"},"PeriodicalIF":12.2,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A multimodal hierarchical learning approach for virtual metrology in semiconductor manufacturing","authors":"Qunlong Chen , Wei Qin , Hongwei Xu","doi":"10.1016/j.jmsy.2025.02.010","DOIUrl":"10.1016/j.jmsy.2025.02.010","url":null,"abstract":"<div><div>Achieving high-precision wafer yield prediction is a crucial step in improving the quality of semiconductor manufacturing. However, existing methods overlook the multimodal characteristics in wafer fabrication, leading to limitations in prediction accuracy and interpretability. To address the problem, this paper proposes an adaptive modal division and hierarchical learning method for wafer yield prediction. Firstly, Bayesian optimization is employed to adaptively search for the optimal modal division locations in the training samples, categorizing the samples into three distinct yield groups (high, medium, and low) with explicit production relevance. Concurrently, a novel degradation and incremental learning mechanism is designed to address the problem of declining prediction accuracy due to sample imbalance. Subsequently, a classification-regression hierarchical learning architecture is established to separately learn the distribution characteristics of each modality. This involves training classifiers using the labels derived from modal division, followed by distinct regressors for each category to facilitate precise yield predictions. Finally, experimental validations based on simulation and real-world manufacturing data demonstrate that the proposed virtual metrology approach accounting for multimodal characteristics exhibits enhanced performance and robustness.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"80 ","pages":"Pages 194-205"},"PeriodicalIF":12.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Marco Hussong , Patrick Ruediger-Flore , Matthias Klar , Marius Kloft , Jan C. Aurich
{"title":"Selection of manufacturing processes using graph neural networks","authors":"Marco Hussong , Patrick Ruediger-Flore , Matthias Klar , Marius Kloft , Jan C. Aurich","doi":"10.1016/j.jmsy.2025.02.016","DOIUrl":"10.1016/j.jmsy.2025.02.016","url":null,"abstract":"<div><div>The increasing complexity of modern manufacturing, driven by trends such as product customization and shorter product life cycles, presents significant challenges in process planning. Traditional methods for selecting manufacturing processes in industry rely on expert knowledge and manual intervention, which can be time-consuming and error-prone. Systems that can automate the selection of manufacturing processes become increasingly important. Current approaches for the selection of manufacturing processes focus on deep learning that convert the 3D CAD models to intermediate representations such as voxels, point clouds or dexels. However, this transformation can result in the loss of topological, geometrical, or Product and Manufacturing Information (PMI). To address these challenges, this paper proposes a neural network architecture MaProNet. MaProNet is a graph attention neural network (GAT) designed to capture topological and geometrical information through the analysis of Attributed Adjacency Graphs (AAG) and Mesh structures. MaProNet also incorporates a wide range of PMI information.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"80 ","pages":"Pages 176-193"},"PeriodicalIF":12.2,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tianyu Wang , Zhihao Liu , Lihui Wang , Mian Li , Xi Vincent Wang
{"title":"A design framework for high-fidelity human-centric digital twin of collaborative work cell in Industry 5.0","authors":"Tianyu Wang , Zhihao Liu , Lihui Wang , Mian Li , Xi Vincent Wang","doi":"10.1016/j.jmsy.2025.02.018","DOIUrl":"10.1016/j.jmsy.2025.02.018","url":null,"abstract":"<div><div>Digital Twin (DT) of a manufacturing system mainly involving materials and machines has been widely explored in the past decades to facilitate the mass customization of modern products. Recently, the new vision of Industry 5.0 has brought human operators back to the core part of work cells. To this end, designing human-centric DT systems is vital for an ergonomic and symbiotic working environment. However, one major challenge is the construction and utilization of high-fidelity digital human models. In the literature, preset universal human avatar models such as skeletons are mostly employed to represent the human operators, which overlooks the individual differences of physical traits. Besides, the fundamental utilization features such as motion tracking and procedure recognition still do not well address the practical issues such as occlusions and incomplete observations. To deal with the challenge, this paper proposes a systematic design framework to quickly and precisely build and utilize the human-centric DT systems. The mesh-based customized human operator models with rendered appearances are first generated within one minute from a short motion video. Then transformer-based deep learning networks are developed to realize the motion-related operator status synchronization in complex conditions. Extensive experiments on multiple real-world human–robot collaborative work cells show the superior performance of the proposed framework over the state-of-the-art.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"80 ","pages":"Pages 140-156"},"PeriodicalIF":12.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jiacheng Sun , Dong Wang , Zhenyu Liu , Chan Qiu , Hui Liu , Guodong Sa , Jianrong Tan
{"title":"Tool digital twin based on knowledge embedding for precision CNC machine tools: Wear prediction for collaborative multi-tool","authors":"Jiacheng Sun , Dong Wang , Zhenyu Liu , Chan Qiu , Hui Liu , Guodong Sa , Jianrong Tan","doi":"10.1016/j.jmsy.2025.02.021","DOIUrl":"10.1016/j.jmsy.2025.02.021","url":null,"abstract":"<div><div>Tool wear prediction is vital for enhancing machining accuracy and ensuring production safety. However, challenges arise from non-processing data interference and missing tool wear samples, complicating the construction of accurate prediction models. Additionally, the complexity of collaborative multi-tool operations on precision computer numerical control (CNC) machine tools, where varying tool types and complex working conditions exist, further exacerbates the difficulty of achieving precise wear prediction. To address these challenges, this paper introduces a digital twin architecture for tool wear prediction, based on knowledge embedding. The proposed architecture is designed to predict the wear of multiple tools, incorporating modules for processing data screening, missing value completion, wear state classification, and so on. On the basis of obtaining high-quality sensing data and complete tool wear values, the wear state and machining process knowledge are embedded into the prediction process. A tool wear prediction model is then constructed based on a Kolmogorov-Arnold integrated time convolutional network (KA-TCN), so as to achieve accurate prediction of multi-tool wear. The effectiveness of the method is validated using data from two grinding wheel wear test platforms and two milling datasets, PHM2010 and NASA. Experimental results demonstrate that the knowledge embedded KA-TCN model outperforms existing approaches, improving prediction accuracy by over 22.4 % on the milling dataset, and by 76.4 % in grinding wheel wear prediction compared to classical methods.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"80 ","pages":"Pages 157-175"},"PeriodicalIF":12.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Binbin Zhao , Xiaokai Mu , Hao Li , Wenliao Du , Qingchao Sun
{"title":"A novel intelligent assembly-adjustment method for aero-engine rotor system aimed at improving interface load-bearing performance","authors":"Binbin Zhao , Xiaokai Mu , Hao Li , Wenliao Du , Qingchao Sun","doi":"10.1016/j.jmsy.2025.03.001","DOIUrl":"10.1016/j.jmsy.2025.03.001","url":null,"abstract":"<div><div>For aero-engine rotor system, the interface load-bearing performance is crucial for its connection stability. In order to effectively ensure the connection performance of aero-engine in strong service environments, this paper proposed an intelligent assembly-adjustment method that integrates key feature measurement, performance prediction and process feedback. Taking the typical multi-bolts connection structure in aero-engine rotor system as the research object, firstly, by using the intelligent fastener, the precise acquisition of preload distribution after assembly process has been achieved. Then, for the issue of interface load-bearing performance weakening represented by non-uniform slip behavior, a <span><math><mi>CON</mi></math></span>-<span><math><mrow><mo>∆</mo><mi>e</mi></mrow></math></span> agent model was constructed for predicting the non-uniformity of interface slip. Finally, based on <span><math><mi>CON</mi></math></span> reduction principle, a local preload feedback-adjustment method for improving the interface load-bearing performance has been proposed. Through a simulated rotor assembly case, the effectiveness of the proposed intelligent assembly-adjustment method in improving interface load-bearing performance was demonstrated. Overall, the research content has a better application prospect in connection stability improvement of mechanical system.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"80 ","pages":"Pages 126-139"},"PeriodicalIF":12.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"MetaFactory: A cloud-based framework to configure and generate dynamic data structures from the STEP-NC knowledge graph","authors":"Wenlei Xiao , Tianze Qiu , Jiurong Guo , Gang Zhao","doi":"10.1016/j.jmsy.2025.02.012","DOIUrl":"10.1016/j.jmsy.2025.02.012","url":null,"abstract":"<div><div>In our previous studies, twin-oriented manufacturing has been identified as a crucial solution to address the manufacturing crisis. Within this context, the notion of “digital twin as a service” necessitates that various twin services share and communicate with each other in a standardized manner. STEP-NC offers a potentially unified model to facilitate data exchange, providing object-oriented and standardized data models for a comprehensive representation of manufacturing resources in the digital realm. However, the complexity of STEP-NC renders it too cumbersome for implementation in diverse cloud-based services or PC-based software. This complexity is a fundamental reason why STEP-NC has struggled to find application in commercial CNC systems despite years of research. To overcome this technical challenge, this paper introduces a novel concept termed “dynamic STEP-NC data structure”, inspired by the dynamic language philosophy of dynamic programming language (such as Python). This approach allows different services and software packages to maintain their own data definitions while still aligning with the original STEP-NC definition. We have developed a framework called MetaFactory that supports the configuration of streamlined data structures and generates the corresponding program code required by various service developers. On this basis, we implemented automatic modeling for a STEP-NC object-oriented database. Using the data trimming and dimensionality reduction methods provided by MetaFactory, several prototype systems for different application scenarios have been developed.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"80 ","pages":"Pages 89-107"},"PeriodicalIF":12.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tianze Qiu , Bofang Dai , Wenlei Xiao , Chen Zhao , Gang Zhao
{"title":"An efficient online geometric simulation algorithm for real-time CNC machining process based on look-ahead method","authors":"Tianze Qiu , Bofang Dai , Wenlei Xiao , Chen Zhao , Gang Zhao","doi":"10.1016/j.jmsy.2025.02.013","DOIUrl":"10.1016/j.jmsy.2025.02.013","url":null,"abstract":"<div><div>Intelligent CNC machining requires advanced online geometric simulation to improve transparency and optimize machining processes. The simulation algorithms need to be efficient enough to keep up with machine tool motions. However, traditional algorithms, which typically discretize the entire blank initially, often result in redundant computations, hindering efficiency in online environments. To strike a balance between efficiency and accuracy, this paper presents an efficient online simulation algorithm with three key innovations. First, the algorithm incorporates the concept of look-ahead into geometric simulation to pinpoint workpiece areas likely to contact the cutting tool. Second, it employs a dynamic voxel partitioning mechanism that adapts to the cutting tool’s movement, reducing data structures and eliminating redundant computations. Third, a hybrid modeling approach integrates voxel model spatial indexing with Tri-dexel model Boolean operations, enabling rapid local positioning and efficient micro-structural representation of the workpiece. Additionally, the algorithm is further optimized in key stages such as online interpolation and surface reconstruction. This algorithm has been integrated into several online simulation software systems and tested and validated on multiple typical 3/5-axis workpieces. Actual machining experiments confirm its efficiency, with over 99% of simulation computation times below 10 ms, meeting the requirements for online environments. The algorithm also demonstrates excellent performance in simulating large-scale aerospace workpieces, providing a solid foundation for real-time synchronization of geometric and physical parameters.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"80 ","pages":"Pages 108-125"},"PeriodicalIF":12.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Digital twin of dynamics for parallel kinematic machine with distributed force/position interaction","authors":"Fangyan Zheng , Xinghui Han , Lin Hua , Wenjun Xu","doi":"10.1016/j.jmsy.2025.02.019","DOIUrl":"10.1016/j.jmsy.2025.02.019","url":null,"abstract":"<div><div>Extensibility is significant for digital twin (DT) manufacturing systems. However, existing DT models mainly focus on a specific task in manufacturing. The main challenge lies in the specific physical model when addressing different tasks. In fact, the dynamics of machines are the physical basis for most applications, e.g., motion planning, production scheduling, process monitoring, machine maintenance, and so on. Therefore, the Digital Twin of dynamics (DTOD) for machines will be a foundation for a highly integrated and extensible DT system. However, due to the challenges in real-time dynamic modeling and the corresponding data interaction methods, the DTOD for parallel kinematic machines (PKM) has not been realized.</div><div>Facing this challenge, this paper develops a DTOD for PKM with distributed force/position interaction. Firstly, a simplified rigid-flexible coupling dynamic model of PKM, considering link deformations, is established for real-time calculation. Then, a distributed position/force interaction method based on Kalman filter-based data fusion is proposed to realize high-performance data interaction between cyber and physical space. On this basis, a five-dimension digital twin model for DTOD of PKM is established. Further, the DTOD system with an architecture comprising dual central processors and multiple distributed edge executors/sensors is developed and validated by aircraft gear manufacturing, showing 80 % prediction accuracy of dynamic error. Finally, to show the extensibility, integrated error correction for aircraft gear manufacturing is proposed as an extended application of the DTOD system. The gear error is reduced to 218 μm (with error correction) from 503 μm, representing a reduction of about 57 %, showing the high performance of the developed DTOD system and its high application potential.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"80 ","pages":"Pages 70-88"},"PeriodicalIF":12.2,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhongwei Huang , Honghao Zhang , Guangdong Tian , Mingzhi Yang , Danqi Wang , Zhiwu Li
{"title":"Energy-efficient human-robot collaborative U-shaped disassembly line balancing problem considering turn on-off strategy: Uncertain modeling and solution method","authors":"Zhongwei Huang , Honghao Zhang , Guangdong Tian , Mingzhi Yang , Danqi Wang , Zhiwu Li","doi":"10.1016/j.jmsy.2025.02.004","DOIUrl":"10.1016/j.jmsy.2025.02.004","url":null,"abstract":"<div><div>The quantity of waste automobile is becoming very large. Waste automobile not only occupies resources, but also easily pollutes the environment. How to realize the efficient and green treatment of recycled automobile is a hot topic in the industrial circular economy today. The disassembly line is the most efficient way to address large-scale waste automobile. Therefore, this paper takes the disassembly experiment of recycled automobile engine as the information orientation to construct energy-efficient human-robot collaborative U-shaped disassembly line balancing (HRU-DLB) framework considering turn on-off strategy. An engine disassembly information modeling method is proposed to address the issue on the actual disassembly space limitation. Establish a based-normal cloud HRU-DLBP mathematical model including disassembly smoothness, disassembly energy consumption (DEC), disassembly cost, disassembly idle time and disassembly carbon emission (DCE). To further reduce the disassembly energy consumption and carbon emission, the well-accepted energy-saving measure, known as the turn on-off strategy, is also integrated. Subsequently, a hybrid multi-objective optimization algorithm called ALNS-NSGA II, which combines the NSGA-II algorithm and adaptive large-scale neighborhood search algorithm is developed to explore the optimal Pareto solution set. Finally, the novel behavioral decision model is proposed to select the optimal HRU-DLB scheme. The comparative analysis shows that the turn on-off strategy can reduce DEC by 26 % and DCE by 3.1 % in a cycle time, respectively. The computational results confirm the feasibility and effectiveness of the proposed ALNS-NSGA II in solving the HRU-DLBP. The comparative analysis and sensitivity analysis demonstrate that the proposed behavioral decision model has better ranking and classification effects.</div></div>","PeriodicalId":16227,"journal":{"name":"Journal of Manufacturing Systems","volume":"80 ","pages":"Pages 38-69"},"PeriodicalIF":12.2,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}