Assembly Automation最新文献

Online modeling of environmental constraint region for complex-shaped parts assembly 复杂形状零件装配环境约束区域的在线建模

IF 2.1 4区计算机科学

Assembly Automation Pub Date : 2022-11-25 DOI: 10.1108/aa-07-2022-0180

Shuai Gan, Yang Liu, Ziyu Chen

{"title":"Online modeling of environmental constraint region for complex-shaped parts assembly","authors":"Shuai Gan, Yang Liu, Ziyu Chen","doi":"10.1108/aa-07-2022-0180","DOIUrl":"https://doi.org/10.1108/aa-07-2022-0180","url":null,"abstract":"\u0000Purpose\u0000The paper aims to propose a method to build environmental constraint region online in complex-shaped peg-in-hole assembly tasks.\u0000\u0000\u0000Design/methodology/approach\u0000Compared with conventional way which using computer-aided design (CAD) models of assembly parts to construct the environmental constraint region offline, the paper provides an online approach that consists of three aspects: modeling assembly parts through visual recognition, decomposing complex shapes into multiple primitive convex shapes and a numerical algorithm to simulate the peg-in-hole insertion contact. Besides, a contrast experiment is performed to validate the feasibility and effectiveness of the method.\u0000\u0000\u0000Findings\u0000The experiment result indicates that online construction takes less time than the offline way under the same task conditions. Furthermore, due to the CAD models of the parts are not required to be known, the method proposed in the paper has a broader application in most assembly scenarios.\u0000\u0000\u0000Originality/value\u0000With the improvement of customization and complexity of manufactured parts, the assembly of complex-shaped parts has drawn greater attention of many researchers. The assembly methods based on attractive region in environment (ARIE) have shown great performance to achieve high-precision manipulation with low-precision systems. The construction of environmental constraint region serves as an essential part of ARIE-based theory, directly affect the formulation and application of assembly strategies.\u0000","PeriodicalId":55448,"journal":{"name":"Assembly Automation","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44341469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The application of robotics and artificial intelligence in embroidery: challenges and benefits 机器人和人工智能在刺绣中的应用:挑战与益处

IF 2.1 4区计算机科学

Assembly Automation Pub Date : 2022-11-25 DOI: 10.1108/aa-07-2022-0183

Ling Chen, Zhi Su, Xiaotong He, Xiang Chen, Lin Dong

{"title":"The application of robotics and artificial intelligence in embroidery: challenges and benefits","authors":"Ling Chen, Zhi Su, Xiaotong He, Xiang Chen, Lin Dong","doi":"10.1108/aa-07-2022-0183","DOIUrl":"https://doi.org/10.1108/aa-07-2022-0183","url":null,"abstract":"\u0000Purpose\u0000Embroidery as a textile embellishment technique plays an important role in people's daily life. Esthetic embroidery artworks possess cultural values. With the development of robotics and artificial intelligence (AI), these technologies have been studied and applied in the embroidery process. This study aims to survey how these technologies facilitate embroidery from different aspects.\u0000\u0000\u0000Design/methodology/approach\u0000This paper surveys how the technologies of robotics and AI are applied in the embroidery field. The applications are mainly reviewed from three aspects: computerized robotic embroidery systems has been widely used for the mass production of embroidered textiles, the advanced technological systems and techniques have greatly facilitated the development of smart textiles and the artificial intelligence plays an important role in the inheritance, innovation and protection of traditional handicraft artwork of embroidery.\u0000\u0000\u0000Findings\u0000The programmable robotic embroidery machines have greatly improved the production efficiency of embroidered textiles and promoted the development of electronic textiles. The AI, mainly the deep learning technology, brings significant benefits to esthetic embroidery creation. Technology-based embroidery has become a hot research topic in the field of textiles.\u0000\u0000\u0000Originality/value\u0000This paper summarizes the application of robotics and AI technologies in the field of embroidery, which provides readers a comprehensive and systematic understanding about the research progress of modern technology-oriented embroidery. This helps readers gain inspiration from the technology perspectives.\u0000","PeriodicalId":55448,"journal":{"name":"Assembly Automation","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42781082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Adaptive neural prescribed performance control for switched pure-feedback non-linear systems with input quantization 带输入量化的开关纯反馈非线性系统的自适应神经预定性能控制

IF 2.1 4区计算机科学

Assembly Automation Pub Date : 2022-11-25 DOI: 10.1108/aa-05-2022-0126

Zhong Cao, L. Zhang, A. Ahmad, F. Alsaadi, M. Alassafi

{"title":"Adaptive neural prescribed performance control for switched pure-feedback non-linear systems with input quantization","authors":"Zhong Cao, L. Zhang, A. Ahmad, F. Alsaadi, M. Alassafi","doi":"10.1108/aa-05-2022-0126","DOIUrl":"https://doi.org/10.1108/aa-05-2022-0126","url":null,"abstract":"\u0000Purpose\u0000This paper aims to investigate an adaptive prescribed performance control problem for switched pure-feedback non-linear systems with input quantization.\u0000\u0000\u0000Design/methodology/approach\u0000By using the semi-bounded continuous condition of non-affine functions, the controllability of the system can be guaranteed. Then, a constraint variable method is introduced to ensure that the tracking error satisfies the prescribed performance requirements. Meanwhile, to avoid the design difficulties caused by the input quantization, a non-linear decomposition method is adopted. Finally, the feasibility of the proposed control scheme is verified by a numerical simulation example.\u0000\u0000\u0000Findings\u0000Based on neural networks and prescribed performance control method, an adaptive neural control strategy for switched pure-feedback non-linear systems is proposed.\u0000\u0000\u0000Originality/value\u0000The complex deduction and non-differentiable problems of traditional prescribed performance control methods can be solved by using the proposed error transformation approach. Besides, to obtain more general results, the restrictive differentiability assumption on non-affine functions is removed.\u0000","PeriodicalId":55448,"journal":{"name":"Assembly Automation","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44738353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Automatic tolerance analyses by generation of assembly graph and mating edges from STEP AP 242 file of mechanical assembly 利用STEP ap242文件生成装配图和配合边进行公差自动分析

IF 2.1 4区计算机科学

Assembly Automation Pub Date : 2022-11-17 DOI: 10.1108/aa-11-2021-0155

Mukunthan S., Manu R., D. Lawrence K.

{"title":"Automatic tolerance analyses by generation of assembly graph and mating edges from STEP AP 242 file of mechanical assembly","authors":"Mukunthan S., Manu R., D. Lawrence K.","doi":"10.1108/aa-11-2021-0155","DOIUrl":"https://doi.org/10.1108/aa-11-2021-0155","url":null,"abstract":"\u0000Purpose\u0000This paper aims to propose a method to automate the tolerance analyses of mechanical assembly using STandard for the Exchange of Product model data-Application Protocol Part 242 (STEP AP 242) files derived from the 3-D computer-aided design (CAD) models.\u0000\u0000\u0000Design/methodology/approach\u0000Product manufacturing information and mating information available in ISO 10303 STEP AP242 files resulting from the 3-D CAD model of mechanical assembly are extracted. The extracted geometric attributes, geometric dimensioning and tolerancing (GD&T) and mating information are used to automatically generate assembly graph and mating edges required for the tolerance analyses of the mechanical assembly by using the matrix approach.\u0000\u0000\u0000Findings\u0000The feasibility of the proposed method is verified through two mechanical assembly case studies. The results of manual calculations and tolerance values computed by the automated method are very closely matching.\u0000\u0000\u0000Practical implications\u0000Tolerance analysis is an integral part of product development that directly influences the cost and performance of a product. Apart from the academic interest, the work is expected to have positive implications for the digital design and smart manufacturing industry that involve in the development of solutions for automation of design and manufacturing system functions.\u0000\u0000\u0000Originality/value\u0000The approach presented in the paper that aids the automation of tolerance analyses of mechanical assembly is an innovative application of the STEP AP 242 file. The automation of tolerance analyses would improve the productivity and efficiency of the product realization process.\u0000","PeriodicalId":55448,"journal":{"name":"Assembly Automation","volume":"1 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41796989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tolerance analysis of planar parts with skin modeling considering spatial distribution characteristics of surface morphology and local surface deformations 考虑表面形貌空间分布特征和局部表面变形的蒙皮建模平面零件公差分析

IF 2.1 4区计算机科学

Assembly Automation Pub Date : 2022-11-10 DOI: 10.1108/aa-07-2022-0198

Tuanhui Shen, Cong Lu

{"title":"Tolerance analysis of planar parts with skin modeling considering spatial distribution characteristics of surface morphology and local surface deformations","authors":"Tuanhui Shen, Cong Lu","doi":"10.1108/aa-07-2022-0198","DOIUrl":"https://doi.org/10.1108/aa-07-2022-0198","url":null,"abstract":"Purpose\u0000This paper aims to develop a method to improve the accuracy of tolerance analysis considering the spatial distribution characteristics of part surface morphology (SDCPSM) and local surface deformations (LSD) of planar mating surfaces during the assembly process.\u0000\u0000\u0000Design/methodology/approach\u0000First, this paper proposes a skin modeling method considering SDCPSM based on Non-Gaussian random field. Second, based on the skin model shapes, an improved boundary element method is adopted to solve LSD of nonideal planar mating surfaces, and the progressive contact method is adopted to obtain relative positioning deviation of mating surfaces. Finally, the case study is given to verify the proposed approach.\u0000\u0000\u0000Findings\u0000Through the case study, the results show that different SDCPSM have different influences on tolerance analysis, and LSD have nonnegligible and different influence on tolerance analysis considering different SDCPSM. In addition, the LSD have a greater influence on translational deviation along the z-axis than rotational deviation around the x- and y-axes.\u0000\u0000\u0000Originality/value\u0000The surface morphology with different spatial distribution characteristics leads to different contact behavior of planar mating surfaces, especially when considering the LSD of mating surfaces during the assembly process, which will have further influence on tolerance analysis. To address the above problem, this paper proposes a tolerance analysis method with skin modeling considering SDCPSM and LSD of mating surfaces, which can help to improve the accuracy of tolerance analysis.","PeriodicalId":55448,"journal":{"name":"Assembly Automation","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45832076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Geometric modeling analysis method for stacking assembly deviation of aero engine rotor 航空发动机转子叠装偏差的几何建模分析方法

IF 2.1 4区计算机科学

Assembly Automation Pub Date : 2022-11-08 DOI: 10.1108/aa-05-2022-0130

Zesheng Wang, Dongbo Wu, Haibo Wang, Jiawei Liang, Jingguang Peng

{"title":"Geometric modeling analysis method for stacking assembly deviation of aero engine rotor","authors":"Zesheng Wang, Dongbo Wu, Haibo Wang, Jiawei Liang, Jingguang Peng","doi":"10.1108/aa-05-2022-0130","DOIUrl":"https://doi.org/10.1108/aa-05-2022-0130","url":null,"abstract":"\u0000Purpose\u0000Assembly errors of aeroengine rotor must be controlled to improve the aeroengine efficiency. However, current method cannot truly reflect assembly errors of the rotor in working state owing to difficulties in error analysis. Therefore, the purpose of this study is to establish an optimization method for aeroengine rotor stacking assembly.\u0000\u0000\u0000Design/methodology/approach\u0000The assembly structure of aeroengine rotor is featured. Rotor eccentricity is optimized based on Jacobian–Torsor model. Then, an optimization method for assembly work is proposed. The assembly process of the high-pressure compressor rotor and the high-pressure turbine rotor as the rotor core assembly is mainly considered.\u0000\u0000\u0000Findings\u0000An aeroengine rotor is assembled to verify the method. The results show that the predicted eccentricity differed from the measured eccentricity by 6.1%, with a comprehensive error of 8.1%. Thus, the optimization method has certain significance for rotor assembly error analysis and assembly process optimization.\u0000\u0000\u0000Originality/value\u0000In view of the error analysis in the stacking assembly of aeroengine rotor, an innovative optimization method is proposed. The method provides a novel approach for the aeroengine rotor assembly optimization and is applicable for the assembly of high-pressure compressor rotor and high-pressure turbine rotor as the rotor core assembly.\u0000","PeriodicalId":55448,"journal":{"name":"Assembly Automation","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44689311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reinforcement learning control for a flapping-wing micro aerial vehicle with output constraint 具有输出约束的扑翼微型飞行器的强化学习控制

IF 2.1 4区计算机科学

Assembly Automation Pub Date : 2022-10-27 DOI: 10.1108/aa-05-2022-0140

Haifeng Huang, Xiaoyan Wu, Tingting Wang, Yongbin Sun, Qiang Fu

{"title":"Reinforcement learning control for a flapping-wing micro aerial vehicle with output constraint","authors":"Haifeng Huang, Xiaoyan Wu, Tingting Wang, Yongbin Sun, Qiang Fu","doi":"10.1108/aa-05-2022-0140","DOIUrl":"https://doi.org/10.1108/aa-05-2022-0140","url":null,"abstract":"\u0000Purpose\u0000This paper aims to study the application of reinforcement learning (RL) in the control of an output-constrained flapping-wing micro aerial vehicle (FWMAV) with system uncertainty.\u0000\u0000\u0000Design/methodology/approach\u0000A six-degrees-of-freedom hummingbird model is used without consideration of the inertial effects of the wings. A RL algorithm based on actor–critic framework is applied, which consists of an actor network with unknown policy gradient and a critic network with unknown value function. Considering the good performance of neural network (NN) in fitting nonlinearity and its optimum characteristics, an actor–critic NN optimization algorithm is designed, in which the actor and critic NNs are used to generate a policy and approximate the cost functions, respectively. In addition, to ensure the safe and stable flight of the FWMAV, a barrier Lyapunov function is used to make the flight states constrained in predefined regions. Based on the Lyapunov stability theory, the stability of the system is analyzed, and finally, the feasibility of RL in the control of a FWMAV is verified through simulation.\u0000\u0000\u0000Findings\u0000The proposed RL control scheme works well in ensuring the trajectory tracking of the FWMAV in the presence of output constraint and system uncertainty.\u0000\u0000\u0000Originality/value\u0000A novel RL algorithm based on actor–critic framework is applied to the control of a FWMAV with system uncertainty. For the stable and safe flight of the FWMAV, the output constraint problem is considered and solved by barrier Lyapunov function-based control.\u0000","PeriodicalId":55448,"journal":{"name":"Assembly Automation","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43406226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Fusion event-triggered model predictive control based on shrinking prediction horizon 基于收缩预测范围的融合事件触发模型预测控制

IF 2.1 4区计算机科学

Assembly Automation Pub Date : 2022-10-13 DOI: 10.1108/aa-02-2022-0022

Qun Cao, Yuanqing Xia, Zhongqi Sun, Li Dai

引用次数: 0

Coaxiality and perpendicularity prediction of saddle surface rotor based on deep belief networks 基于深度信念网络的鞍面转子同轴度和垂直度预测

IF 2.1 4区计算机科学

Assembly Automation Pub Date : 2022-10-11 DOI: 10.1108/aa-06-2022-0163

Chuanzhi Sun, Yin Chu Wang, Qing Lu, Yongmeng Liu, Jiubin Tan

{"title":"Coaxiality and perpendicularity prediction of saddle surface rotor based on deep belief networks","authors":"Chuanzhi Sun, Yin Chu Wang, Qing Lu, Yongmeng Liu, Jiubin Tan","doi":"10.1108/aa-06-2022-0163","DOIUrl":"https://doi.org/10.1108/aa-06-2022-0163","url":null,"abstract":"\u0000Purpose\u0000Aiming at the problem that the transmission mechanism of the assembly error of the multi-stage rotor with saddle surface type is not clear, the purpose of this paper is to propose a deep belief network to realize the prediction of the coaxiality and perpendicularity of the multi-stage rotor.\u0000\u0000\u0000Design/methodology/approach\u0000First, the surface type of the aero-engine rotor is classified. The rotor surface profile sampling data is converted into image structure data, and a rotor surface type classifier based on convolutional neural network is established. Then, for the saddle surface rotor, a prediction model of coaxiality and perpendicularity based on deep belief network is established. To verify the effectiveness of the coaxiality and perpendicularity prediction method proposed in this paper, a multi-stage rotor coaxiality and perpendicularity assembly measurement experiment is carried out.\u0000\u0000\u0000Findings\u0000The results of this paper show that the accuracy rate of face type classification using convolutional neural network is 99%, which meets the requirements of subsequent assembly process. For the 80 sets of test samples, the average errors of the coaxiality and perpendicularity of the deep belief network prediction method are 0.1 and 1.6 µm, respectively.\u0000\u0000\u0000Originality/value\u0000Therefore, the method proposed in this paper can be used not only for rotor surface classification but also to guide the assembly of aero-engine multi-stage rotors.\u0000","PeriodicalId":55448,"journal":{"name":"Assembly Automation","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42732024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inventive redesign for automatic assembly in the household appliances industry 家用电器行业自动装配的创造性重新设计

IF 2.1 4区计算机科学

Assembly Automation Pub Date : 2022-10-10 DOI: 10.1108/aa-01-2022-0010

A. Bianchini, A. Ceruti, A. D'Anniballe, J. Rossi, Giorgio Zompi

{"title":"Inventive redesign for automatic assembly in the household appliances industry","authors":"A. Bianchini, A. Ceruti, A. D'Anniballe, J. Rossi, Giorgio Zompi","doi":"10.1108/aa-01-2022-0010","DOIUrl":"https://doi.org/10.1108/aa-01-2022-0010","url":null,"abstract":"\u0000Purpose\u0000In the redesign process of assembly components that need adaptation to robotic assembly, designers can find support from structured methodologies for innovation, such as the theory of inventive problem solving (TRIZ). This paper aims to illustrate the authors’ methodology for redesigning gas hobs components for adaptation to robotic assembly.\u0000\u0000\u0000Design/methodology/approach\u0000A designer approaching a redesign task of an assembly component of any kind for adaptation to robotic assembly must consider, first of all, the features and limitations of existing robotic assembly systems; the generation of new design ideas that best fit the requirements may result to be a very challenging task. Here, the TRIZ methodology has proven useful for generating design ideas and finding the best solution.\u0000\u0000\u0000Findings\u0000The authors’ methodology approaches the challenges of redesign tasks for robotic assembly adaptation, which exploits knowledge of automatic and robotic assembly systems and the TRIZ method for innovation; it has proven useful in the redesign, checks and prototyping of gas hobs components.\u0000\u0000\u0000Originality/value\u0000This paper shows how the TRIZ methodology can be integrated into the redesign process and its impact on an industrial environment. The work’s main value is to provide a set of steps to help the designers change their design components approach that is necessary but not still implemented to optimize the use of the automation.\u0000","PeriodicalId":55448,"journal":{"name":"Assembly Automation","volume":" ","pages":""},"PeriodicalIF":2.1,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49491025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0