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Digital Twin-based Quality Management Method for the assembly process of Aerospace Products with the Grey-Markov Model and Apriori Algorithm

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Chinese Journal of Mechanical Engineering 2022年第5期35卷 66-86页

作者： Cunbo Zhuang Ziwen Liu Jianhua Liu Hailong Ma Sikuan Zhai Ying Wu Laboratory of Digital Manufacturing School of Mechanical EngineeringBeijing Institute of TechnologyBeijing 100081China Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314000China Shanghai Institute of Spacecraft Equipment Shanghai 200240China

The assembly process of aerospace products such as satellites and rockets has the characteristics of single-or small-batch production,a long development period,high reliability,and frequent *** to predict and avoid quality abnormalities,quickly locate their causes,and improve product assembly quality and efficiency are urgent engineering *** the core technology to realize the integration of virtual and physical space,digital twin(DT)technology can make full use of the low cost,high efficiency,and predictable advantages of digital space to provide a feasible solution to such ***,a quality management method for the assembly process of aerospace products based on DT is *** that traditional quality control methods for the assembly process of aerospace products are mostly post-inspection,the Grey-Markov model and T-K control chart are used with a small sample of assembly quality data to predict the value of quality data and the status of an assembly *** Apriori algorithm is applied to mine the strong association rules related to quality data anomalies and uncontrolled assembly systems so as to solve the issue that the causes of abnormal quality are complicated and difficult to *** implementation of the proposed approach is described,taking the collected centroid data of an aerospace product’s cabin,one of the key quality data in the assembly process of aerospace products,as an example.A DT-based quality management system for the assembly process of aerospace products is developed,which can effectively improve the efficiency of quality management for the assembly process of aerospace products and reduce quality abnormalities.

关键词： Quality management Digital twin assembly process Aerospace product Grey Markov model Apriori algorithm

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COMPUTER SIMULATION OF 3-DIMENSIONAL DYNAMIC assembly process OF MECHANICAL ROTATIONAL BODY

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Chinese Journal of Mechanical Engineering 1998年第3期11卷 8-12页

作者： Yang, Jichang Li, Jinban Gu, Jinan Zhang, Ziyu Jiangsu Univ of Science and Technology Jiangsu China

Focusing on the study of the components of mechanical rotational body,the data structure and algorithm of component model generation are *** problems in assembly process of 3 dimensional graph of components are studi... 详细信息

关键词： Mechanical component Component mode assembly process 3 dimensional graph Dynamic model

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Optimization of Rotor assembly process of Rotor Initial Unbalance of an Aeroengine Gas Generator

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Transactions of Nanjing University of Aeronautics and Astronautics 2021年第1期38卷 132-139页

作者： BAO Youlin LI Lixin CAO Peng LI Ciying HUANG Xinglong AECC Hunan Aviation Powerplant Research Institute Zhuzhou 412002P.R.China

The rotor initial unbalance of an aeroengine gas generator of turboshaft engine seriously affects rotor assembly *** reasonably optimize rotor assembly process,the effect analyses of rotor initial unbalance of single disc and combined discs on rotor dynamic characteristics are firstly implemented in respect of the dispersity of rotor initial *** is found that the most important factors contributing to rotor vibration are the unbalances of the first stage compressor disc and the second stage turbine ***,reducing the mass of two discs conflicts with the control of the whole gas generator rotor balance resulting from the unbalance increase of single ***,we further analyze the key control factors of affecting rotor initial unbalance,and give the strict control measures of centrifugal impeller runout in the assembly process by adjusting the angle of central tie rod *** purpose of this measures to make the assembly process simpler and more effective for timely controlling rotor initial *** efforts of this study validate that the proposed method is workable for the rotor tightened by a central tie rod and possesses the significant meaning of practical application in engineering.

关键词： turboshaft engine initial unbalance assembly process gas generator rotor control technique

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Evaluating Methods of Visual Assistance for Workers to Improve Quality and Usability in Individualized Kitchen Cabinet assembly

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Journal of Computer and Communications 2024年第2期12卷 156-172页

作者： Albert Eff Michael S. J. Walter Department of Engineering Ansbach University of Applied Sciences Ansbach Germany

In times of digitalisation, visual assistance systems in assembly are increasingly important. The design of these assembly systems needs to be highly complex to meet the requirements. Due to the increasing number of variants in production processes, as well as shorter innovation and product life cycles, assistance systems should improve quality and reduce complexity of assembly processes. However, many large kitchen manufacturers still assemble kitchen cabinets manually, due to the high variety of components, such as rails and fittings. This paper focuses on the analysis and evaluation of virtual assistance systems to improve quality and usability in individualised kitchen cabinet assembly processes at a large German manufacturer. A solution is identified and detailed.

关键词： Digitalisation assembly process Visual Assistance Usability Human-Centred assembly Design

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assembly Information Model Based on Knowledge Graph

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Journal of Shanghai Jiaotong university(Science) 2020年第5期25卷 578-588页

作者： CHEN Zhiyu BAO Jinsong ZHENG Xiaohu LIU Tianyuan College of Mechanical Engineering Donghua UniversityShanghai 201600China

There are heterogeneous problems between the CAD model and the assembly process *** the planning stage of assembly process,these heterogeneous problems can decrease the efficiency of information *** on knowledge graph,this paper proposes an assembly information model(KGAM)to integrate geometric information from CAD model,non-geometric information and semantic information from assembly process *** describes the integrated assembly process information as a knowledge graph in the form of“entity-relationship-entity”and“entity-attribute-value”,which can improve the efficiency of information *** the trial assembly stage of a certain type of aeroengine compressor rotor component as an example,KGAM is used to get its assembly process knowledge *** trial data show the query and update rate of assembly attribute information is improved by more than *** the query and update rate of assembly semantic information is improved by more than *** conclusion,KGAM can solve the heterogeneous problems between the CAD model and the assembly process document and improve the information interaction efficiency.

关键词： knowledge graph assembly process information model integrating

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Interval method for Solving Multibody System Dynamic Equation with uncertain parameters 6th

Interval method for Solving Multibody System Dynamic Equatio...

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The sixth Asian Conference on Multibody Dynamics(ACMD 2012)

作者： Jinglai Wu Yunqing Zhang Liping Chen Zhen Luo Nong Zhang National Engineering Research Centre for CAD School of Mechanical Science and Technology Huazhong University of Science and Technology School of Mechanical and Mechatronic Engineering University of TechnologySydney UltimoNSW 2007Australia

＜正＞Modern multibody systems containing such as mechanisms,robotics,vehicles,and machines *** often very complex and consist of many components interconnected by mechanical joints and force elements. The governing equations of such systems are often governed by index-3 differential algebraic equations （DAEs）.Although mathematical modeling tools for multibody dynamics simulation have experienced a tremendous growth,most researches were based on the assumption that all parameters of multibody systems are ***,the realistic engineering multibody systems often operate under some degree of uncertainty which may be resulted from variability in their geometric or material parameters,or caused by the

关键词： Uncertainty manufacturing tolerances Plant uncertain INTEGRATION TIME bar linkage Series expansions material parameter interval method parameters CHEBYSHEV FUNCTIONS scanning method dynamic equation assembly process nonlinear equations

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