Shanghai Key Laboratory of Advanced Manufacturing Environment

Shanghai, China

Shanghai Key Laboratory of Advanced Manufacturing Environment

Shanghai, China
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Qiu S.,Shanghai JiaoTong University | Qiu S.,Shanghai Key Laboratory of Advanced Manufacturing Environment | Sallak M.,CNRS Heuristic and Diagnostic Methods for Complex Systems | Schon W.,CNRS Heuristic and Diagnostic Methods for Complex Systems | Cherfi-Boulanger Z.,CNRS Roberval Laboratory (Mechanical Research Unit)
Control Engineering Practice | Year: 2017

The aim of the paper is twofold. First, it proposes an original application of the Valuation-Based System (VBS) for the availability assessment of systems under uncertainty in a time-varying fashion. Uncertainties related to failure data of components (data uncertainty) and the system structure (model uncertainty) are analysed in the proposed model. Second, it proposes the application of the VBS for the availability assessment of the European Rail Traffic Management System (ERTMS) Level 2 under uncertainty according to the railway dependability standards. The originality of this work lies in the application of the VBS for the availability assessment of systems under data and model uncertainties, and the proposition of a temporal VBS to evaluate the instantaneous system availability. © 2017 Elsevier Ltd


Sun J.,Shanghai JiaoTong University | Sun J.,YAPP Automotive Parts Co. | Chen X.,Institute of Computer Integrated Manufacturing | Liao H.,China Institute of Technology | And 2 more authors.
Rapid Prototyping Journal | Year: 2013

Purpose - The purpose of this paper is to propose a template-based framework for nasal prosthesis fabrication using a 3D areal scanner and a CT scanner. Design/methodology/approach - Use of a self-designed 3D areal scanner enables acquisition of accurate data describing the patient's face. Patients with nasal defects have no organization for reference, but the template-based model construction method can ensure successful building of the outer surface of the nasal prosthesis. Since the areal scanner has some difficulties acquiring data for concave areas, preoperative CT data are used to provide concave information, enabling construction of the inner surface for the nasal prosthesis. The combined inner and outer surfaces are used to generate the completed nasal prosthesis. Findings - The results showed that the nasal prosthesis fits the patient's appearance well. Clinical applications confirmed that this framework is attractive and has the potential desired nasal prosthesis in daily clinical practice. Practical implications - The results of this study improve the fabrication accuracy of nasal prostheses. The construction and development technique employs a nasal digital library, 3D areal scanning data and CT scanning data. This technique facilitates fabrication of precise nasal prostheses while helping the patients predict the effect before the prosthesis is manufactured. Originality/value - This template-based framework has strong potential for clinical applications because of its advantages over other methods in terms of accuracy, speed, safety, and cost. © Copyright - 2013 Emerald Group Publishing Limited. All rights reserved.


Zheng Y.,Shanghai JiaoTong University | Zheng Y.,Shanghai Key Laboratory of Advanced Manufacturing Environment | Ni Y.,Shanghai Key Laboratory of Advanced Manufacturing Environment | Xi J.,Shanghai Key Laboratory of Advanced Manufacturing Environment
Journal of the Balkan Tribological Association | Year: 2016

Civil aircraft is a kind of complicated product with the tremendous product data and intricate data evolution process. Data consistency management in the product lifecycle is an extremely significant problem. Product data consistency management for civil aircraft is not only required by the airworthiness certification on conformity inspection, also related to the success of the new product development. In this paper, the aircraft product BOM frame and structure are analyzed in the 'airframer-suppliers' development model. Operations and changes during the BOM transition and reconstruction from engineering BOM to manufacturing BOM are illustrated. The differences between engineering BOM and manufacturing BOM which are generated during the BOM transition are classified into 'normal inconsistencies' and 'erroneous inconsistencies'. For the erroneous inconsistencies inspection, a product structure relation based conformity inspection method is proposed. The corresponding algorithm is clarified, and its workflow is described in detail. The civil aircraft conformity inspection system is developed. The method and system are applied in practical product data management of ARJ21-700 and verified efficiently. © 2016, Scibulcom Ltd. All rights reserved.


Yu C.,Shanghai JiaoTong University | Xi J.,Shanghai JiaoTong University | Xi J.,Shanghai Key Laboratory of Advanced Manufacturing Environment
Robotics and Computer-Integrated Manufacturing | Year: 2018

For a robot-based inspecting system calibration procedure in the production environment, it is desirable that the calibration technique should be automatic, time-saving and convenient to implement. The paper presents a new self-calibration method to calibrate and compensate for the robot-based inspecting system's kinematic errors. Compared with traditional calibration methods, this calibration approach has several unique features. First, the inspecting system can be calibrated without external measurement devices since an optical sensor is mounted to the robot end-effector as its integral part, so it can make the inspecting system realizing on-line calibration. Second, it simultaneously calibrates all the kinematic parameters of the inspecting system in one step to avoid error propagation rather than calibrate the hand-eye relationship, the robot itself and the robot exterior relationship separately. Third, the paper analyzes and eliminates redundant kinematic parameters in the inspecting system's kinematic model and derives a MDH model without redundancy. These features not only realize the automatic calibration of the inspecting system but also greatly reduce the number of identified parameters and avoid error propagation, therefore, enhance the efficiency and accuracy of parameter estimation. Experiments are conducted on a 6 DOF serial robot-based inspecting system to validate the good performance of the proposed method. © 2017 Elsevier Ltd


Huang X.,Shanghai JiaoTong University | Shen B.,Shanghai JiaoTong University | Chen D.,Shanghai Key Laboratory of Advanced Manufacturing Environment
DSDE 2010 - International Conference on Data Storage and Data Engineering | Year: 2010

IT Service Management (ITSM) is playing an increasing important role in ensuring consistency between information technology and business process nowadays. As the core of ITSM, IT Service Support ensures that the customer has appropriate services to support business function. Therefore£¬many organizations adopt best practices and tools in order to import IT Service Support normative and efficiency, and IT Infrastructure Library (ITIL) has been the international de facto standard. However, current standards and tools are not enough to provide precise, abstract and systematic IT Service Support concepts. Furthermore, process model integration, reuse and exchange still remains a challenge in IT Service Support process development area. In this context, an ITIL-based IT Service Support Process metamodel was presented in this paper. The metamodel extends Business Process Definition Metamodel (BPDM) as an IT Service Support process is also a business process. The metamodel has characteristic of easy operation and simple structure, and it has been preliminary applied in implementation of IT Service Support Process tool. The proposed metamodel soundly support process modeling and business rule customization in the form of ECA (Event-Condition-Action). © 2010 IEEE.


Yan W.,Shanghai JiaoTong University | Shen B.,Shanghai JiaoTong University | Chen D.,Shanghai Key Laboratory of Advanced Manufacturing Environment
2nd International Workshop on Education Technology and Computer Science, ETCS 2010 | Year: 2010

IT service providers face a great need to improve the quality of services by IT service management (ITSM) in highly complex IT Environments. This pressure demands a strong collaboration from both the external service providers and internal service providers. However, providers still lack the necessary support, in methodologies and tools, to achieve efficient collaboration strategies. This paper proposes an innovative approach which comprehends a methodology and a tool to support collaborative work in IT service management. The main ideal of this solution is to integrate worksheet management with the core processes of service support defined in IT Infrastructure Library (ITIL), and inject delegation mechanism to the configuration management. © 2010 IEEE.


Xiong S.,Shanghai JiaoTong University | Xiong S.,Shanghai Key Laboratory of Advanced Manufacturing Environment | Zhao J.,Hubei University | Jiang Z.,Shanghai JiaoTong University | Dong M.,Shanghai JiaoTong University
International Journal of Advanced Manufacturing Technology | Year: 2010

There has been a growing trend among shoe manufacturers to introduce customized shoes to satisfy varying customer style, fit, and comfort needs, thus to increase the product's added value. This study presents a computer-aided design (CAD) system for designing a customized shoe last based on the chosen shoe style and customer's foot features. The CAD system first automatically extracts 18 important foot features from a laser-scanned customer's foot. Then, it applies a global grading with a local deformation approach that can deform the base shoe last with the customer's chosen style to the customized shoe last based on the extracted foot features while maintaining the customer's chosen style. Finally, the system evaluates the final foot shoe last fit and represents the fit in a contoured figure. The experimental results show that the proposed CAD system can be adopted by shoe manufacturers to make customized shoes with the customer's chosen style and foot size and shape. © 2009 Springer-Verlag London Limited.


Xu W.,Shanghai JiaoTong University | Chen X.,Shanghai JiaoTong University | Xi J.,Shanghai Key Laboratory of Advanced Manufacturing Environment | Xi J.,Xi'an Jiaotong University
Guangxue Xuebao/Acta Optica Sinica | Year: 2011

Based on simulation of the influence of gamma nonlinearity of the projector on phase error, a method of phase error compensation for structural light measurement based on phase shifting is put forward. In this method, quadratic polynomial is used to approximate the intensity of the captured images, meanwhile least square fitting method is used to compensate the phase error, and in this way, system error caused by the gamma nonlinearity of the projector is reduced greatly. Because it doesn't depend on environmental light, camera parameters or DLP parameters, this method has superiority in aspects of universality, complexity and calculation speed. Experimental results show that this method reduces greatly the phase error caused by the gamma nonlinearity of the projector. The average phase error is 5 times smaller than that before error compensation, meanwhile the bit error rate of unwrapping based on look-up table method is reduced 14.5 times.


Feng H.,Shanghai JiaoTong University | Bao J.,Shanghai JiaoTong University | Bao J.,Shanghai Key Laboratory of Advanced Manufacturing Environment | Jin Y.,Shanghai JiaoTong University | Jin Y.,Shanghai Key Laboratory of Advanced Manufacturing Environment
Journal of Computational Information Systems | Year: 2010

In the production process, some goods or materials stored in carts distributed in a job shop need to be transported to some destination locations by vehicles as soon as possible for storing or processing, which gives rise to a problem called the multiple vehicle transporting goods problem (MVTGP). In the MVTGP, distances of vehicles transporting carts with goods or materials from start locations to end locations are changed dynamically according to schedules. A genetic particle swarm optimization (PSO), a hybrid genetic PSO and an improved hybrid genetic PSO algorithm are employed for solving the problem. The computational results show that the performances of the improved hybrid genetic PSO algorithm are the best. Copyright © 2010 Binary Information Press.


Zhu H.,Shanghai JiaoTong University | Wu D.,Shanghai JiaoTong University | Wu D.,Shanghai Key Laboratory of Advanced Manufacturing Environment | Fan X.,Shanghai JiaoTong University | Fan X.,Shanghai Key Laboratory of Advanced Manufacturing Environment
Assembly Automation | Year: 2010

Purpose - The purpose of this paper is to develop a modeling and interactive operating method for virtual assembly (VA) to support assembly process generation based on interactive operation. Design/methodology/approach - This paper puts forward an assembly semantic modeling method for interactive assembly and process generation after the analysis on requirements of operation process generation. Based on this semantic model, methods for semantic generation, semantic processing and assembly motion extraction from interactive operation are presented. Partial process generation of auto engine is proposed to verify the approaches in this paper. Findings - The application shows that assembly semantic modeling and operating methods can support process generation based on VA operations. Originality/value - The approaches presented in this paper improve the efficiency of assembly process, making assembly process intuitive and natural. © Emerald Group Publishing Limited.

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