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A robot chamfering system for special-shaped and thin-walled workpieces Assem. Autom. (IF 1.582) Pub Date : 2021-01-11 Mingyang Li; Zhijiang Du; Xiaoxing Ma; Wei Dong; Yongzhi Wang; Yongzhuo Gao; Wei Chen
Purpose This paper aims to propose a robotic automation system for processing special-shaped thin-walled workpieces, which includes a measurement part and a processing part. Design/methodology/approach In the measurement part, to efficiently and accurately realize the three-dimensional camera hand-eye calibration based on a large amount of measurement data, this paper improves the traditional probabilistic
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Self-aided SINS for spiral-diving human-occupied vehicle in midwater Assem. Autom. (IF 1.582) Pub Date : 2021-01-11 Xianjun Liu; Xixiang Liu; Hang Shen; Peijuan Li; Tongwei Zhang
Purpose Motivated by the problems that the positioning error of strap-down inertial navigation system (SINS) accumulates over time and few sensors are available for midwater navigation, this paper aims to propose a self-aided SINS scheme for the spiral-diving human-occupied vehicle (HOV) based on the characteristics of maneuvering pattern and SINS error propagation. Design/methodology/approach First
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HGHA: task allocation and path planning for warehouse agents Assem. Autom. (IF 1.582) Pub Date : 2021-01-05 Yandong Liu; Dong Han; Lujia Wang; Cheng-Zhong Xu
Purpose With the rapid development of e-commerce, logistics demand is increasing day by day. The modern warehousing with a multi-agent system as the core comes into being. This paper aims to study the task allocation and path-planning (TAPP) problem as required by the multi-agent warehouse system. Design/methodology/approach The TAPP problem targets to minimize the makespan by allocating tasks to the
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A capsule-based collision detection approach of irregular objects in virtual maintenance Assem. Autom. (IF 1.582) Pub Date : 2021-01-04 Yuxue Jin; Jie Geng; Zhiyi He; Chuan Lv; Tingdi Zhao
Purpose Virtual maintenance simulation is of great importance to help designers find and avoid design problems. During its simulation phase, besides the high precision requirement, collision detection must be suitable for all irregular objects in a virtual maintenance environment. Therefore, in this paper, a collision detection approach is proposed based on encapsulation for irregular objects in the
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Experimental investigation on nozzle diameter of vortex gripper Assem. Autom. (IF 1.582) Pub Date : 2021-01-04 Jianghong Zhao; Xin Li
Purpose Vortex grippers use tangential nozzles to form vortex flow and are able to grip a workpiece without any physical contact, thus avoiding any unintentional workpiece damage. This study aims to use experimental and theoretical methods to investigate the effects of nozzle diameter on the performance. Design/methodology/approach First, various suction force-distance curves were developed to analyze
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Analysis of assembly defects in the cam curved groove mechanism Assem. Autom. (IF 1.582) Pub Date : 2020-12-28 Weibin Lan; Shouwen Fan; Shuai Fan
Purpose This paper aims to propose an elementary approach toward the identification of assembly defects of a cam curved groove mechanism. Design/methodology/approach A numerical analysis method for identifying the assembly defects of the cam curved groove mechanism is proposed by resorting to Hertz contact theory. A general mathematical model is established to analyze the kinematic and dynamic characteristics
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A multi-innovation with forgetting factor based EKF-SLAM method for mobile robots Assem. Autom. (IF 1.582) Pub Date : 2020-12-30 Zhen Zhou; Dongqing Wang; Boyang Xu
Purpose The purpose of this paper is to explore a multi-innovation with forgetting factor-based EKF-SLAM (FMI-EKF-SLAM) algorithm to solve the error increasing problem, caused by the Extended Kalman filtering (EKF) violating the local linear assumption in simultaneous localization and mapping (SLAM) for mobile robots because of strong nonlinearity. Design/methodology/approach A multi-innovation with
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Improved multi-objective cuckoo search algorithm with novel search strategies for point-to-point part feeding scheduling problems of automotive assembly lines Assem. Autom. (IF 1.582) Pub Date : 2020-12-07 Binghai Zhou; Xiujuan Li; Yuxian Zhang
Purpose This paper aims to investigate the part feeding scheduling problem with electric vehicles (EVs) for automotive assembly lines. A point-to-point part feeding model has been formulated to minimize the number of EVs and the maximum handling time by specifying the EVs and sequence of all the delivery tasks. Design/methodology/approach First, a mathematical programming model of point-to-point part
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Universal grey number theory for the uncertainty presence of wiper structural system Assem. Autom. (IF 1.582) Pub Date : 2020-12-07 Zhiqiang Liang; Xintian Liu; Wang Yansong; Xiaolan Wang
Purpose This study aims to accurately evaluate the influence of various error intervals on the performance of the wiper. Design/methodology/approach The wiper structural system is decomposed into classical four-link planar for kinematics analysis, and it was modeled respectively by using interval method, universal grey number theory and enumeration approach depending on the nature of uncertainty. Findings
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A new approach of surfaces registration considering form errors for precise assembly Assem. Autom. (IF 1.582) Pub Date : 2020-10-16 Qiushuang Zhang; Xin Jin; Zhihua Liu; Zhijing Zhang; Yan Fang; Zhongqing Zhang; Yann Ledoux
Purpose The modern manufacturing industry has put forward higher requirements for the assembly accuracy of components with the development of the industrial technology. For precision assembly, the traditional assembly process study based on tolerance has had difficulty in meeting these requirements. Hence, the distribution of the form errors must be considered. The registration between the two mating
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Assembly kits with variable part physical attributes: warehouse layout design and assignment procedure Assem. Autom. (IF 1.582) Pub Date : 2020-10-16 Marco Bortolini; Maurizio Faccio; Mauro Gamberi; Francesco Pilati
Purpose The kitting feeding policy creates kits with the parts of each product to assemble. Each kit contains elements with heterogeneous physical properties imposing heterogeneous logistic facilities and management solutions for storage and handling. The purpose of this paper is to present and apply a two-step procedure to design the part warehouse layout and to assign locations in case of kitting
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Failure prediction in electrical connector assembly: a case in automotive assembly process Assem. Autom. (IF 1.582) Pub Date : 2020-10-20 Armagan Altinisik; Utku Yildirim
Purpose Electrical defects cover an important part of assembly defects and strongly affect the vehicle system performance. Almost 40% of assembly defects are classified as human errors and electrical connection failures represent a significant part of them. Humans still remain a cost-effective solution for the flexible manufacturing systems with increasing product complexity. So, understanding human
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Learning peg-in-hole assembly using Cartesian DMPs with feedback mechanism Assem. Autom. (IF 1.582) Pub Date : 2020-10-19 Nailong Liu; Xiaodong Zhou; Zhaoming Liu; Hongwei Wang; Long Cui
Purpose This paper aims to enable the robot to obtain human-like compliant manipulation skills for the peg-in-hole (PiH) assembly task by learning from demonstration. Design/methodology/approach A modified dynamic movement primitives (DMPs) model with a novel hybrid force/position feedback in Cartesian space for the robotic PiH problem is proposed by learning from demonstration. To ensure a compliant
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An automated guided logistics robot for pallet transportation Assem. Autom. (IF 1.582) Pub Date : 2020-11-30 Rui Lin; Haibo Huang; Maohai Li
Purpose This study aims to present an automated guided logistics robot mainly designed for pallet transportation. Logistics robot is compactly designed. It could pick up the pallet precisely and transport the pallet up to 1,000 kg automatically in the warehouse. It could move freely in all directions without turning the chassis. It could work without any additional infrastructure based on laser navigation
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Projection-based augmented reality system for assembly guidance and monitoring Assem. Autom. (IF 1.582) Pub Date : 2020-11-23 Chengjun Chen; Zhongke Tian; Dongnian Li; Lieyong Pang; Tiannuo Wang; Jun Hong
Purpose This study aims to monitor and guide the assembly process. The operators need to change the assembly process according to the products’ specifications during manual assembly of mass customized production. Traditional information inquiry and display methods, such as manual lookup of assembly drawings or electronic manuals, are inefficient and error-prone. Design/methodology/approach This paper
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Robot compliant catching by Maxwell model based Cartesian admittance control Assem. Autom. (IF 1.582) Pub Date : 2020-10-21 Le Fu; Jie Zhao
Purpose Admittance control is a typical complaint control methodology. Traditionally, admittance control systems are based on a dynamical relationship described by Voigt model. By contrast, after changing connection of spring and damper, Maxwell model produces different dynamics and has shown better impact absorption performance. This paper aims to design a novel compliant control method based on Maxwell
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An improved flower pollination algorithm for solving a Type-II U-shaped assembly line balancing problem with energy consideration Assem. Autom. (IF 1.582) Pub Date : 2020-09-18 Beikun Zhang; Liyun Xu
Purpose The increasing energy shortage leads to worldwide attentions. This paper aims to develop a mathematical model and optimization algorithm to solve the energy-oriented U-shaped assembly line balancing problem. Different from most existing works, the energy consumption is set as a major objective. Design/methodology/approach An improved flower pollination algorithm (IFPA) is designed to solve
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Modeling of rotation accuracy of multi-support rotating machinery considering geometric errors and part deformation Assem. Autom. (IF 1.582) Pub Date : 2020-09-23 Yanhui Sun; Junkang Guo; Jun Hong; Guanghui Liu
Purpose This paper aims to develop a theoretical method to analyze the rotation accuracy of rotating machinery with multi-support structures. The method effectively considers the geometric errors and assembly deformation of parts. Design/methodology/approach A method composed of matrix and FEA methods is proposed to do the analysis. The deviation propagation analysis results and external loads are
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Optimal design of a parallel robotic gripper using enhanced multi-objective ant lion optimizer with a sensitivity analysis approach Assem. Autom. (IF 1.582) Pub Date : 2020-07-08 Golak Bihari Mahanta; Deepak BBVL; Bibhuti B. Biswal; Amruta Rout
Purpose From the past few decades, parallel grippers are used successfully in the automation industries for performing various pick and place jobs due to their simple design, reliable nature and its economic feasibility. So, the purpose of this paperis to design a suitable gripper with appropriate design parameters for better performance in the robotic production systems. Design/methodology/approach
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Robotic assembly for tight tolerant cascaded peg-in-hole process with incomplete constraints Assem. Autom. (IF 1.582) Pub Date : 2020-08-06 Hongtai Cheng; Tianzhuo Liu; Wei Zhang; Lina Hao
Purpose Installing a tight tolerant stepped shaft is not a trivial task for an industrial robot. If all peg-hole constraints are complete, the cascaded peg-in-hole task can be simplified into several independent stages and accomplished one by one. However, if some of the constraints are incomplete, the cross stage interference will bring additional difficulties. This paper aims to discuss the cascaded
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A heuristic method with a novel stability concept to perform parallel assembly sequence planning by subassembly detection Assem. Autom. (IF 1.582) Pub Date : 2020-08-28 Anil Kumar Gulivindala; M.V.A. Raju Bahubalendruni; S.S. Vara Prasad Varupala; Sankaranarayanasamy K.
Purpose Parallel assembly sequence planning (PASP) reduces the overall assembly effort and time at the product development stage. Methodological difficulties at framework development and computational issues at their implementation made the PASP complex to achieve. This paper aims to propose a novel stability concept for subassembly detection to minimize the complexities in PASP. Design/methodology/approach
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Intelligent planning of product assembly sequences based on spatio-temporal semantic knowledge Assem. Autom. (IF 1.582) Pub Date : 2020-07-14 Hongjuan Yang; Jiwen Chen; Chen Wang; Jiajia Cui; Wensheng Wei
Purpose The implied assembly constraints of a computer-aided design (CAD) model (e.g. hierarchical constraints, geometric constraints and topological constraints) represent an important basis for product assembly sequence intelligent planning. Assembly prior knowledge contains factual assembly knowledge and experience assembly knowledge, which are important factors for assembly sequence intelligent
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GSR: geometrical scan registration algorithm for robust and fast robot pose estimation Assem. Autom. (IF 1.582) Pub Date : 2020-08-21 Farhad Shamsfakhr; Bahram Sadeghi Bigham
Purpose In this paper, an attempt has been made to develop an algorithm equipped with geometric pattern registration techniques to perform exact, robust and fast robot localization purely based on laser range data. Design/methodology/approach The expected pose of the robot on a pre-calculated map is in the form of simulated sensor readings. To obtain the exact pose of the robot, segmentation of both
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Design of H_/H∞ fault detection observer for closed-loop nonlinear system with disturbance Assem. Autom. (IF 1.582) Pub Date : 2020-05-28 Zhengquan Chen; Lu Han; Yandong Hou
Purpose This paper proposes a novel method of fault detection, which is based on H_/H∞ Runge–Kutta observer and an adaptive threshold for a class of closed-loop non-linear systems. The purpose of this paper is to improve the rapidity and accuracy of fault detection. Design/methodology/approach First, the authors design the H_/H∞ Runge–Kutta fault detection observer, which is used as a residual generator
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Active disturbance rejection control strategy for airborne radar stabilization platform based on cascade extended state observer Assem. Autom. (IF 1.582) Pub Date : 2020-05-14 Dong Mei; Zhu-Qing Yu
Purpose This paper aims to improve the anti-interference ability of the airborne radar stabilization platform, especially the ability to suppress continuous disturbance under complex air conditions to ensure the clarity and stability of airborne radar imaging. Design/methodology/approach This paper proposes a new active disturbance rejection control (ADRC) strategy based on the cascade extended state
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A flexible planning methodology for product family assembly line based on improved NSGA_II Assem. Autom. (IF 1.582) Pub Date : 2020-05-23 Yongming Wu; Xudong Zhao; Yanxia Xu; Yuling Chen
Purpose The product family assembly line (PFAL) is a mixed model-assembly line, which is widely used in mass customization and intelligent manufacturing. The purpose of this paper is to study the problem of PFAL, a flexible (evolution) planning method to respond to product evolution for PFAL, to focus on product data analysis and evolution planning method. Design/methodology/approach The evolution
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3D long-term recurrent convolutional networks for human sub-assembly recognition in human-robot collaboration Assem. Autom. (IF 1.582) Pub Date : 2020-05-14 Xianhe Wen; Heping Chen
Purpose Human assembly process recognition in human–robot collaboration (HRC) has been studied recently. However, most research works do not cover high-precision and long-timespan sub-assembly recognition. Hence this paper aims to deal with this problem. Design/methodology/approach To deal with the above-mentioned problem, the authors propose a 3D long-term recurrent convolutional networks (LRCN) by
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Parallel structure of six wheel-legged robot trajectory tracking control with heavy payload under uncertain physical interaction Assem. Autom. (IF 1.582) Pub Date : 2020-07-06 Jiehao Li; Junzheng Wang; Shoukun Wang; Hui Peng; Bomeng Wang; Wen Qi; Longbin Zhang; Hang Su
Purpose This paper aims on the trajectory tracking of the developed six wheel-legged robot with heavy load conditions under uncertain physical interaction. The accuracy of trajectory tracking and stable operation with heavy load are the main challenges of parallel mechanism for wheel-legged robots, especially in complex road conditions. To guarantee the tracking performance in an uncertain environment
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Design and tests of a non-contact Bernoulli gripper for rough-surfaced and fragile objects gripping Assem. Autom. (IF 1.582) Pub Date : 2020-06-29 Dong Liu; Minghao Wang; Naiyu Fang; Ming Cong; Yu Du
Purpose Varied shapes and sizes of different products with irregular rough surface and fragile properties give a challenge to traditional contact gripping. Single Bernoulli grippers are not suited to handle fragile objects as the impact of center negative pressure force could result in large deformation and stress which damage the materials, and they are also have some limitations for gripping objects
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Investigations for partial denture casting by fused deposition modelling-assisted chemical vapour smoothing Assem. Autom. (IF 1.582) Pub Date : 2020-06-29 Gurpartap Singh; Rupinder Singh; S.S. Bal
Purpose The purpose of this study is to investigate dimensional accuracy (Δd), surface roughness (Ra) and micro hardness (HV) of partial dentures (PD) prepared with synergic combination of fused deposition modelling (FDM) assisted chemical vapour smoothing (CVS) patterns and conventional dental casting (DC) from multi-factor optimization view point. Design/methodology/approach The master pattern for
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Optimization of fastener pattern in airframe assembly Assem. Autom. (IF 1.582) Pub Date : 2020-06-25 Sergey Lupuleac; Tatiana Pogarskaia; Maria Churilova; Michael Kokkolaras; Elodie Bonhomme
Purpose The authors consider the problem of optimizing temporary fastener patterns in aircraft assembly. Minimizing the number of fasteners while maintaining final product quality is one of the key enablers for intensifying production in the aerospace industry. The purpose of this study is to formulate the fastener pattern optimization problem and compare different solving approaches on both test benchmarks
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A spatial information inference method for programming by demonstration of assembly tasks by integrating visual observation with CAD model Assem. Autom. (IF 1.582) Pub Date : 2020-06-03 Zhongxiang Zhou; Liang Ji; Rong Xiong; Yue Wang
Purpose In robot programming by demonstration (PbD) of small parts assembly tasks, the accuracy of parts poses estimated by vision-based techniques in demonstration stage is far from enough to ensure a successful execution. This paper aims to develop an inference method to improve the accuracy of poses and assembly relations between parts by integrating visual observation with computer-aided design
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Haptic-enabled virtual planning and assessment of product assembly Assem. Autom. (IF 1.582) Pub Date : 2020-05-09 Enrique Gallegos-Nieto; Hugo I. Medellin-Castillo; Yan Xiu-Tian; Jonathan Corney
Purpose This study aims to present a new haptic-enabled virtual assembly system for the automatic generation and objective assessment of assembly plans. The system is intended to be used as an assembly planning tool along the product development process. Design/methodology/approach The generation of product assembly plans is based on the analysis of the assembly movements and operations performed by
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A fuzzy-regression-PSO based hybrid method for selecting welding conditions in robotic gas metal arc welding Assem. Autom. (IF 1.582) Pub Date : 2020-05-06 Amruta Rout; Deepak Bbvl; Bibhuti B. Biswal; Golak Bihari Mahanta
Purpose This paper aims to propose fuzzy-regression-particle swarm optimization (PSO) based hybrid optimization approach for getting maximum weld quality in terms of weld strength and bead depth of penetration. Design/methodology/approach The prediction of welding quality to achieve best of it is not possible by any single optimization technique. Therefore, fuzzy technique has been applied to predict
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A novel optimization approach for segmented rabbit chase oriented U-type assembly line design: an application from lighting industry Assem. Autom. (IF 1.582) Pub Date : 2020-05-02 Emre Cevikcan; Mehmet Bulent Durmusoglu
Rabbit chase (RC) is used as one of the most effective techniques in manufacturing systems, as such systems have high level of adaptability and increased productivity in addition to providing uniform workload balancing and skill improving environment. In assembly systems, RC inspires the development of walking worker assembly line (WWAL). On the other hand, U-type assembly lines (UALs) may provide
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Cabin posture adjustment method based on redundant constrained parallel mechanism Assem. Autom. (IF 1.582) Pub Date : 2020-04-20 Wenmin Chu; Xiang Huang; Shuanggao Li
Posture adjustment plays an important role in spacecraft manufacturing. The traditional posture adjustment method, which has a large workload and is difficult to guarantee the quality of posture adjustment, cannot meet the requirements of modern spacecraft manufacturing. This paper aims to optimize the trajectory of posture adjustment, reduce the internal force of the posture adjustment mechanism and
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An angle-changeable tracked robot with human-robot interaction in unstructured environments Assem. Autom. (IF 1.582) Pub Date : 2020-04-17 Chengguo Zong; Zhijian Ji; Junzhi Yu; Haisheng Yu
Purpose The purpose of this paper is to study the adaptability of the tracked robot in complex working environment. It proposes an angle-changeable tracked robot with human–robot interaction in unstructured environment. The study aims to present the mechanical structure and human–robot interaction control system of the tracked robot and analyze the static stability of the robot working in three terrains
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Optimally scheduling and loading tow trains of in-plant milk-run delivery for mixed-model assembly lines Assem. Autom. (IF 1.582) Pub Date : 2020-04-03 Binghai Zhou; Zhexin Zhu
This paper aims to investigate the scheduling and loading problems of tow trains for mixed-model assembly lines (MMALs). An in-plant milk-run delivery model has been formulated to minimize total line-side inventory for all stations over the planning horizon by specifying the departure time, parts quantity of each delivery and the destination station.,An immune clonal selection algorithm (ICSA) combined
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Mechanism and quantitative evaluation model of slip-induced loosening for bolted joints Assem. Autom. (IF 1.582) Pub Date : 2020-04-03 Qingchao Sun; Qingyuan Lin; Bin Yang; Xianlian Zhang; Lintao Wang
Purpose Bolted joints are the most common type of mechanical connections, and improving the anti-loosening performance of bolts for the reliable performance of mechanical and building structures is highly significant. Design/methodology/approach Because of the lack of sufficient theoretical basis for the evaluation and design of anti-loosening bolts, a quantitative evaluation model exhibiting the following
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An interference discrimination method for assembly sequence planning and assembly simulation Assem. Autom. (IF 1.582) Pub Date : 2020-03-23 Wenlei Zhang; Mingxu Ma; Haiyan Li; Jiapeng Yu; Zhenwei Zhang
Purpose The purpose of this paper is to discriminate fake interference caused by polygonal approximation so as to achieve accurate assembly sequence planning and assembly simulation. Design/methodology/approach An approximation zone model is proposed to formulate polygonal approximation. Fake interference is discriminated from hard interference by evaluating if polygonal models intersect within corresponding
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A measurement method of free-form tube based on multi-view vision for industrial assembly Assem. Autom. (IF 1.582) Pub Date : 2020-03-18 Tianyi Wu; Jian Hua Liu; Shaoli Liu; Peng Jin; Hao Huang; Wei Liu
Purpose This paper aims to solve the problem of free-form tubes’ machining errors which are caused by their complex geometries and material properties. Design/methodology/approach In this paper, the authors propose a multi-view vision-based method for measuring free-form tubes. The authors apply photogrammetry theory to construct the initial model and then optimize the model using an energy function
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Design, engineering and testing of an innovative adaptive automation assembly system Assem. Autom. (IF 1.582) Pub Date : 2020-02-29 Marco Bortolini; Maurizio Faccio; Francesco Gabriele Galizia; Mauro Gamberi; Francesco Pilati
Industry 4.0 emerged as the Fourth Industrial Revolution aiming at achieving higher levels of operational efficiency, productivity and automation. In this context, manual assembly systems are still characterized by high flexibility and low productivity, if compared to fully automated systems. Therefore, the purpose of this paper is to propose the design, engineering and testing of a prototypal adaptive
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A precision analysis method for the kinematic assembly of complex products based on equivalence of deviation source Assem. Autom. (IF 1.582) Pub Date : 2020-02-12 Dongping Zhao; Gangfeng Wang; Jizhuang Hui; Wei Hou; Richard David Evans
The assembly quality of complex products is pivotal to their lifecycle performance. Assembly precision analysis (APA) is an effective method used to check the feasibility and quality of assembly. However, there is still a need for a systematic approach to be developed for APA of kinematic mechanisms. To achieve more accurate analysis of kinematic assembly, this paper aims to propose a precision analysis
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Job rotation scheduling in the Seru system: shake enforced invasive weed optimization approach Assem. Autom. (IF 1.582) Pub Date : 2020-02-06 Ashkan Ayough; Mohammad Hosseinzadeh; Alireza Motameni
Line–cell conversion and rotation of operators between cells are common in lean production systems. Thus, the purpose of this study is to provide an integrated look at these two practices through integrating job rotation scheduling and line-cell conversion problems, as well as investigating the effect of rotation frequency on flow time of a Seru system.,First, a nonlinear integer programming model
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Human-computer interaction based on machine vision of a smart assembly workbench Assem. Autom. (IF 1.582) Pub Date : 2020-01-25 Shiqing Wu; Zhonghou Wang; Bin Shen; Jia-Hai Wang; Li Dongdong
The purpose of this study is to achieve multi-variety and small-batch assembly through direct cooperation between equipment and people and to improve assembly efficiency as well as flexibility.,Firstly, the concept of the human–computer interaction is designed. Secondly, the machine vision technology is studied theoretically. Skin color filter based on hue, saturation and value color model is put forward
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Position analysis of brushless direct current motor using robust fixed order H-infinity controller Assem. Autom. (IF 1.582) Pub Date : 2020-01-23 Sikander Hans; Smarajit Ghosh
The efficient speed controller is found to be an important requirement to run the motor for the brushless direct current (BLDC) motor. This requirement is considered as superior, as it may increase the operating speed and system efficiency. In the existing methods, proportional plus integral (PI) controller has been included because of its simple architecture. But the PI controller produces load disturbance
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An integrated approach for line balancing and AGV scheduling towards smart assembly systems Assem. Autom. (IF 1.582) Pub Date : 2020-01-22 Humyun Fuad Rahman; Mukund Nilakantan Janardhanan; Peter Nielsen
Optimizing material handling within the factory is one of the key problems of modern assembly line systems. The purpose of this paper is to focus on simultaneously balancing a robotic assembly line and the scheduling of material handling required for the operation of such a system, a topic that has received limited attention in academia. Manufacturing industries focus on full autonomy because of the
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A new hybrid particle swarm optimization and parallel variable neighborhood search algorithm for flexible job shop scheduling with assembly process Assem. Autom. (IF 1.582) Pub Date : 2020-01-20 Parviz Fattahi; Naeeme Bagheri Rad; Fatemeh Daneshamooz; Samad Ahmadi
The purpose of this paper is to present a mathematical model and a new hybrid algorithm for flexible job shop scheduling problem with assembly operations. In this problem, each product is produced by assembling a set of several different parts. At first, the parts are processed in a flexible job shop system, and then at the second stage, the parts are assembled and products are produced.,As the problem
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A lean production system design for semiconductor crystal-ingot pulling manufacturing using hybrid Taguchi method and simulation optimization Assem. Autom. (IF 1.582) Pub Date : 2020-01-17 Taho Yang; Yuan-Feng Wen; Zong-Rui Hsieh; Jianxia Zhang
The purpose of this study is to propose an innovative methodology in solving the lean production design from semiconductor crystal-ingot pulling manufacturing which is an important industry. Due to the complexity of the system, it is computationally prohibited by an analytical approach; thus, simulation optimization is adopted for this study.,Four control factors that affect the system’s performance
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Peg-in-hole assembly based on master-slave coordination for a compliant dual-arm robot Assem. Autom. (IF 1.582) Pub Date : 2020-01-16 Yanjiang Huang; Yanglong Zheng; Nianfeng Wang; Jun Ota; Xianmin Zhang
The paper aims to propose an assembly scheme based on master–slave coordination for a compliant dual-arm robot to complete a peg-in-hole assembly task.,The proposed assembly scheme is inspired by the coordinated behaviors of human beings in the assembly process. The left arm and right arm of the robot are controlled to move alternately. The fixed arm and the moving arm are distinguished as the slave
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Preparation of complex surface coatings based on electrospark computer integrated deposition system Assem. Autom. (IF 1.582) Pub Date : 2020-01-10 X.R. Wang; Z.Q. Wang; T.S. Lin; P. He; R.J. Wang; M.Y. Bao
Electrospark deposition (ESD) attracts special attention from scientists and engineers because of its unique advantages. However, the ESD process has been carried out by hand up to the present. This prevents ESD from preparing complex curve/surface coatings owing to manual operation characteristics. To meet the coating precise preparation requirements for a lot of parts with complex surface from various
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Enhanced static modeling of commercial pneumatic artificial muscles Assem. Autom. (IF 1.582) Pub Date : 2020-01-10 XueAi Li; Kui Sun; Chuangqiang Guo; Teng Liu; Hong Liu
This paper aims to propose an enhanced static model of commercial braided pneumatic artificial muscles (PAMs), which is fully analytical without the need for experimentally determined parameters.,To address the highly nonlinear issues of PAMs, the enhanced model is derived considering the irregular shapes close to their end-fittings, as well as the elastic energy stored in both their braids and rubber
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Estimation for normal contact stiffness of joint surfaces by considering the variation of critical deformation Assem. Autom. (IF 1.582) Pub Date : 2020-01-02 Qingchao Sun; Xin Liu; Xiaokai Mu; Yichao Gao
This paper aims to study the relationship between normal contact stiffness and contact load. It purpose a new calculation model of the normal contact stiffness of joint surfaces by considering the elastic–plastic critical deformation change of asperities contact.,The paper described the surface topography of joint surfaces based on fractal geometry, and fractal parameters and of fractal function derived
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A deep learning based automatic surface segmentation algorithm for painting large-size aircraft with 6-DOF robot Assem. Autom. (IF 1.582) Pub Date : 2019-12-19 Guolei Wang; Xiaotong Hua; Jing Xu; Libin Song; Ken Chen
This paper aims to achieve automatically surface segmentation for painting different kinds of aircraft efficiently considering the demands of painting robot.,This project creatively proposed one method that accepts point cloud, outputs several blocks, each of which can be handled by ABB IRB 5500 in one station. Parallel PointNet (PPN) is proposed in this paper for better handling six dimensional aircraft
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Wheel design and motion analysis of a new heavy-duty AGV in aircraft assembly lines Assem. Autom. (IF 1.582) Pub Date : 2019-12-16 Junxia Jiang; Shenglin Zhang; Yuxiao He
The flexible automatic transportation and manual assembly jobs for large aircraft components demand an automated guided vehicle (AGV) system with heavy-duty capacity and omnidirectional movability. This paper aims to propose a four driving-steering wheels-four supporting-steering wheels (4DSW-4SSW) layout plan to enhance the controllability and moving stability of AGV.,The anti-vibration structure
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Application of sensitive dimensionless parameters and PSO–SVM for fault classification in rotating machinery Assem. Autom. (IF 1.582) Pub Date : 2019-12-12 Aisong Qin; Qin Hu; Qinghua Zhang; Yunrong Lv; Guoxi Sun
Rotating machineries are widely used in manufacturing, petroleum, chemical, aircraft, and other industries. To accurately identify the operating conditions of such rotating machineries, this paper aims to propose a fault diagnosis method based on sensitive dimensionless parameters and particle swarm optimization (PSO)–support vector machine (SVM) for reducing the unexpected downtime and economic losses
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Parallel two-sided assembly line balancing with tools and tasks sharing Assem. Autom. (IF 1.582) Pub Date : 2019-11-27 Ashish Yadav; Ramawatar Kulhary; Rupesh Nishad; Sunil Agrawal
Purpose Parallel two-sided assembly lines are usually designed to produce large-sized products such as trucks and buses. In parallel two-sided assembly lines, both left and right sides of the line are used for manufacturing one or more products on two or more assembly lines located parallel to each other. The purpose of this paper is to develop a new mathematical model for the parallel two-sided assembly
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Image-based visual servoing using a set for multiple pin-in-hole assembly Assem. Autom. (IF 1.582) Pub Date : 2019-11-27 Chicheng Liu; Libin Song; Ken Chen; Jing Xu
Purpose This paper aims to present an image-based visual servoing algorithm for a multiple pin-in-hole assembly. This paper also aims to avoid the matching and tracking of image features and the remaining robust against image defects. Design/methodology/approach The authors derive a novel model in the set space and design three image errors to control the 3 degrees of freedom (DOF) of a single-lug
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On stability for learning human control strategy by demonstrations using SVM Assem. Autom. (IF 1.582) Pub Date : 2019-11-23 Zhiyang Wang; Yongsheng Ou
This paper aims to deal with the trade-off of the stability and the accuracy in learning human control strategy from demonstrations. With the stability conditions and the estimated stability region, this paper aims to conveniently get rid of the unstable controller or controller with relatively small stability region. With this evaluation, the learning human strategy controller becomes much more robust
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Optimizing assembly sequence planning using precedence graph-based assembly subsets prediction method Assem. Autom. (IF 1.582) Pub Date : 2019-11-18 Nan Zhang; Zhenyu Liu; Chan Qiu; Weifei Hu; Jianrong Tan
Assembly sequence planning (ASP) plays a vital role in assembly process because it directly influences the feasibility, cost and time of the assembly process. The purpose of this study is to solve ASP problem more efficiently than current algorithms.,A novel assembly subsets prediction method based on precedence graph is proposed to solve the ASP problem. The proposed method adopts the idea of local
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