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2020 Vol. 63, No. 6
Published: 2020-03-15
FEATURE
FORUM
RESEARCH
COVER STORY
APPROACHING SCIENCE
 
       FEATURE
14 AR Assistant Aircraft Assembly Data Error Correction Method Based on Bayesian Error Correction
XIAO Wenlei, ZOU Jie, FENG Jiangwei, ZHAO Gang
DOI: 10.16080/j.issn1671-833x.2020.06.014
Augmented reality (AR) technology can effectively improve the efficiency of aircraft assembly. Through the use of wireless networks, augmented reality devices can conveniently access various artificial intelligence services, and use optical character recognition technology in natural scenes as a cloud service for AR assistant assembly to reduce manual entry. Aiming at problem of cable recognition errors in AR assistant aircraft cable assembly, this paper proposes a postprocessing process for data error correction based on Bayesian error correctors and aviation cable rules, and uses a noise channel model to identify cables. The result data was inferred and corrected, and an AR assistant cable assembly system based on cloud services was constructed. Under the environment of this system, the AR assistant aviation cable assembly experiment was conducted to improve the accuracy of cable recognition from 88% to 98%, which verified that the system has certain efficiency and guaranteed correctness.
2020 Vol. 63 (6): 14-22 [Abstract] ( 198 ) HTMLNew PDF (3489 KB)  ( 527 )
       COVER STORY
24 Final Assembly Process Planning of Aircraft Complex Systems Based on RFLP Models
LI Tao, YE Bo, LUO Xin
DOI: 10.16080/j.issn1671-833x.2020.06.024
This paper firstly clarifies the typical characteristics of aircraft complex systems, and the requirements of aircraft integration verification in product development as well as the challenges in aircraft final assembly process planning. With the help of verification and validation method from systems engineering (SE), a unified framework of aircraft product design and process planning is produced. Then, a final assembly process planning method based on SE RFLP (Requirements-Functional-Logical-Physical) models is proposed to support the information exchange and tracking between interactions of product design and assembly processes in two ways. A case study is implemented and tested the feasibility of the proposed method in early conceptual phase of process planning.
2020 Vol. 63 (6): 24-31 [Abstract] ( 213 ) HTMLNew PDF (6895 KB)  ( 152 )
       FORUM
34 Research on Construction of Aero-Engine Digital Final Assembly Line Oriented to Intelligent Manufacturing
HUANG Jiang, YANG Hai, SHI Xiaoqiang, SHAN Jidong, ZHANG Jing, HAO Feng
DOI: 10.16080/j.issn1671-833x.2020.06.034
Based on the characteristics of aero-engine final assembly business, this paper puts forward the application architecture of aero-engine digital final assembly line oriented to intelligent manufacturing by analyzing the information development trend and construction demand, and expounds the main construction content and technical realization route. It provides an important reference for the construction of digital production lines for intelligent manufacturing products in China’s aero-engine manufacturing enterprises and equipment manufacturing industry.
2020 Vol. 63 (6): 34-42 [Abstract] ( 174 ) HTMLNew PDF (8231 KB)  ( 390 )
43 Investigation on Intelligent Controlling-Management System of Aero-Engines Pulsation Assembly Line
WEI Xiaohong, YAN Jianxing, JIN Mei, YANG Zhuoyong, ZHANG Lei, LIU Zhijun
DOI: 10.16080/j.issn1671-833x.2020.06.043
The pulsation assembly production organization model can effectively improve the quality and efficiency of aero-engine assembly. This paper analysed the domestic aero-engine pulsation assembly production organization model, and drawn a conclusion that accurate production resources distribution is the key to implement the pulsation assembly. Moreover, this paper investigated the key technology of the real-time data driving intelligent controlling-management system of aero-engines pulsation assembly line, via teased out domestic and abroad intelligent manufacturing ecological standards, and the engine assembly requirements. A series of key technologies are proposed, including assembly process simulation, intelligent scheduling, supplies identification and distribution, technical condition management, assembly state monitoring and optimum distribution. This investigation provide technical support for the intelligent, flexible and pulsating aero-engine assembly systems.
2020 Vol. 63 (6): 43-50 [Abstract] ( 161 ) HTMLNew PDF (4127 KB)  ( 934 )
51 Equipment Layout Analysis and Optimization for the Flexible Production System of Aircraft Structural Parts
LI Jie, XIA Yuanmeng, SONG Zhiyong, SHUAI Chaolin, LIU Dawei
DOI: 10.16080/j.issn1671-833x.2020.06.051
The machining of aircraft structural parts is a kind of typical discrete manufacturing, which is characterized with mixture of research and production, small batch and large flexibility. Thus, it is quite difficult to realize automation for the manufacturing process of aircraft structural parts. This paper proposes a comprehensive solution to automation of aircraft structural parts manufacturing that includes logistics, storage, loading and unloading. In this solution, the layout of the equipment is discussed and the quantity of the logistics equipment (AGV, RGV) is analyzed. Besides, a simulation example is shown to analyze the average vacancy rate of a machine when the RGV quantity and delivery time in a manufacturing system is considered, which provides important directions for the construction of the aircraft structural parts oriented flexible production system.
2020 Vol. 63 (6): 51-56 [Abstract] ( 159 ) HTMLNew PDF (14251 KB)  ( 359 )
64 Aircraft Assembly Shop-Floor Resources Tracing and Visualization
MA Teng, JIA Xiaoliang, SUN Bingyang
DOI: 10.16080/j.issn1671-833x.2020.06.064
In the process of aircraft assembly, in order to visually tracing the on-site aircraft assembly resources, this paper proposes an aircraft assembly on-site resources tracing and visualization method oriented CPS and 3D model. Aircraft assembly on-site resources data model is founded that includes spatio-temporal data and 3D data. Based on threedimensional modeling of shop-floor and assembly resources, aircraft assembly on-site resources tracing and visualization framework is established. The feasibility and effectiveness of the proposed method and framework is verified in an aircraft fuselage component assembly shop-floor.
2020 Vol. 63 (6): 64-72 [Abstract] ( 137 ) HTMLNew PDF (4312 KB)  ( 271 )
73 Application Architecture of Intelligent Line for Multi-Variety and Variable-Batch Products
YU Chenglong,HOU Junjie,LU Jing,ZHANG Wei,PU Hongbo,GUO Xukai
DOI: 10.16080/j.issn1671-833x.2020.06.073
To promote the application of intelligent manufacturing technology in the producing process of multivariety and variable-batch products, the application architecture of intelligent line is studied. The application process and system architecture of the line are put forward, and the key contents and technologies are sorted out. It is a good reference value for the development of intelligent manufacturing technology, the construction of intelligent line and the implementation of intelligent manufacturing application in production.
2020 Vol. 63 (6): 73-79 [Abstract] ( 161 ) HTMLNew PDF (2019 KB)  ( 353 )
       APPROACHING SCIENCE
80 Research and Application Technology of Intelligent Robot
2020 Vol. 63 (6): 80-81 [Abstract] ( 128 ) HTMLNew PDF (1194 KB)  ( 457 )
       RESEARCH
82 Review on High Temperature Thin Film Thermocouple for Aero-Engine
ZHOU Yingfeng, CUI Zaifu, LI Xin, ZHOU Paidi, LI Yali, CHEN Qinnan, SUN Daoheng
DOI: 10.16080/j.issn1671-833x.2020.06.082
High temperature film thermocouple is considered as an effective method to measure temperature in extreme environment such as turbine blade, combustion chamber wall and inlet and outlet gas temperature of aero-engine. This paper introduces the research history and current situation of high temperature thin film thermocouple for aero-engine, and summarizes the trends of thin film thermocouple from the thin film material, device performance and applications. The challenges of the current thin film thermocouple in the high temperature stability of sensitive materials, the process of multilayer thin film material system on conductive substrate and the fabrication of sensing thin film on curved surface are analyzed. It also points out the development direction of thin film thermocouple in the future
2020 Vol. 63 (6): 82-89 [Abstract] ( 232 ) HTMLNew PDF (4657 KB)  ( 668 )
90 Improved Particle Swarm Optimization Algorithm for Aircraft Posture Evaluation Problems
CHEN Yuanzhi,HUANG Jie,ZHANG Yilian,ZHU Limin
DOI: 10.16080/j.issn1671-833x.2020.06.090
In an aircraft assembly line, the aircraft posture is required to meet tolerance constraints. A novel optimization model was proposed to obtain the optimal aircraft posture parameters under tolerance constraints. Tolerance constraints, which was transformed into a penalty function, was combined with the sum of distance errors as an objective function for optimization by using PSO for constrained optimization problems (PSO-COPs). Further improvement on the above algorithm, the maximum distance error of the aircraft feature points could be further reduced by using an improved PSO algorithm (IPSO), which was an iterative method by dynamically strengthening tolerance constraints. The simulation example and Monte Carlo simulation indicated that compared with the singular value decomposition method (SVD) and the basic PSO algorithm, PSO-COPs and IPSO can better guarantee the accuracy of aircraft posture for assembly under tolerance constraints.
2020 Vol. 63 (6): 90-96 [Abstract] ( 158 ) HTMLNew PDF (3129 KB)  ( 219 )
       FORUM
97 Research and Application of NC Machining Technology for Large-Scale Precise Casting Titanium Alloy Components
LIU Yuanji, CHEN Qingliang, LUO Jinwei, ZHANG Na
DOI: 10.16080/j.issn1671-833x.2020.06.097
To solve the machining problems of large-scale precise casting titanium alloy components, such as complicated manufacturing processing, poor stiffness, hard-controlled deformation, and difficult processing features, the article finds out an efficient solving processing, which has been implemented in real manufacturing project, from fixing equipment, location technology, deformation control, allowance measurement, cutting tools, cutting parameters, manufacturing strategy, etc. This process lays a solid foundation for the machining of precise casting titanium alloy components and similar structural parts on aircraft, and has good popularization and practical value.
2020 Vol. 63 (6): 97-102 [Abstract] ( 161 ) HTMLNew PDF (2558 KB)  ( 325 )
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