Articles

Keep Healthcare Workers Safe: Application of Teleoperated Robot in Isolation Ward for COVID-19 Prevention and Control

Authors: Geng Yang, Honghao Lv, Zhiyu Zhang, Liu Yang, Jia Deng, Siqi You, Juan Du and Huayong Yang

Anomalies in Special Permutation Flow Shop Scheduling Problems

Recent researches show that there are some anomalies, which are not satisfied with common sense, appearing in some special permutation flow shop scheduling problems (PFSPs). These anomalies can be divided into...

Authors: Lin Gui, Liang Gao and Xinyu Li

Integrated Modelling of Microstructure Evolution and Mechanical Properties Prediction for Q&P Hot Stamping Process of Ultra-High Strength Steel

High strength steel products with good ductility can be produced via Q&P hot stamping process, while the phase transformation of the process is more complicated than common hot stamping since two-step quenchin...

Authors: Yang Chen, Huizhen Zhang, Johnston Jackie Tang, Xianhong Han and Zhenshan Cui

Dynamic Modeling and Analysis of 5-PSS/UPU Parallel Mechanism with Elastically Active Branched Chains

To study the characteristics of the 5-prismatic–spherical–spherical (PSS)/universal–prismatic–universal (UPU) parallel mechanism with elastically active branched chains, the dynamics modeling and solutions of ...

Authors: Yanbiao Li, Hang Zheng, Bo Chen, Peng Sun, Zesheng Wang, Kun Shuai and Yi Yue

Advanced Data Collection and Analysis in Data-Driven Manufacturing Process

The rapidly increasing demand and complexity of manufacturing process potentiates the usage of manufacturing data with the highest priority to achieve precise analyze and control, rather than using simplified ...

Authors: Ke Xu, Yingguang Li, Changqing Liu, Xu Liu, Xiaozhong Hao, James Gao and Paul G. Maropoulos

Progress in Bio-inspired Anti-solid Particle Erosion Materials: Learning from Nature but Going beyond Nature

Solid particle erosion is a common phenomenon in engineering fields, such as manufacturing, energy, military and aviation. However, with the rising industrial requirements, the development of anti-solid partic...

Authors: Shuaijun Zhang, Junqiu Zhang, Bin Zhu, Shichao Niu, Zhiwu Han and Luquan Ren

Remanufacturing Scheme Design for Used Parts Based on Incomplete Information Reconstruction

The different conditions of use of a component result in a variety of damage levels. Therefore, excluding differences in shape and size, used parts show a high degree of uncertainty regarding failure character...

Authors: Wenhao Huang, Zhigang Jiang, Teng Wang, Yan Wang and Xiaoli Hu

Improved Stiffness Modeling for An Exechon-Like Parallel Kinematic Machine (PKM) and Its Application

Hole drilling or contour milling for the large and complex workpieces such as automobile panels and aircraft fuselages makes a high combined demand on machining accuracy, stiffness and workspace of machining e...

Authors: Nanyan Shen, Liang Geng, Jing Li, Fei Ye, Zhuang Yu and Zirui Wang

Residual Stress Relaxation of Thin-walled Long Stringer Made of Aluminum Alloy 7050-T7451 under Transportation Vibration

Thin-walled long stringer made of aluminum alloy 7050-T7451 is prone to deformation during transportation, so a research of residual stress relaxation was launched in this paper. The transport resonance stress...

Authors: Yinfei Yang, Lu Jin, Jixing Du, Liang Li and Wei Yang

SHUYU Robot: An Automatic Rapid Temperature Screening System

Authors: Zhao Gong, Songwen Jiang, Qizhi Meng, Yanlei Ye, Peng Li, Fugui Xie, Huichan Zhao, Chunzhe Lv, Xiaojie Wang and Xinjun Liu

Effect of Agitator’s Types on the Hydrodynamic Flow in an Agitated Tank

The aim of this paper is to study the effect of agitator’s types on the turbulent flows in stirred tanks without and with baffles. The hydrodynamics behavior induced by four different agitator’s types: a Rusht...

Authors: Mohammed Foukrach, Mohamed Bouzit, Houari Ameur and Youcef Kamla

Structural Stress–Fatigue Life Curve Improvement of Spot Welding Based on Quasi-Newton Method

∆F-N curves are usually used to predict the fatigue life of spot welding in engineering, but they are time-consuming and laborious and not universal. For the purpose of predicting the fatigue life of spot weld...

Authors: Yahang Qin, Shoune Xiao, Liantao Lu, Bing Yang, Xiangjie Li and Guangwu Yang

Regulation Method for Torque–Angle Characteristics of Rotary Electric–Mechanical Converter Based on Hybrid Air Gap

The torque–angle characteristics of electric–mechanical converters are important determinants of the quality of electrohydraulic proportional control systems. It is far more difficult for a rotary electric–mec...

Authors: Bin Meng, Yongjiang Lai and Xinguo Qiu

Running-In Behavior of Wet Multi-plate Clutches: Introduction of a New Test Method for Investigation and Characterization

Wet multi-plate clutches are relevant components of modern drivetrain applications, not only in terms of function but also safety and comfort. Especially at the beginning of their lifetime, distinct changes of...

Authors: Katharina Voelkel, Hermann Pflaum and Karsten Stahl

Effect of Trace Addition of Ceramic on Microstructure Development and Mechanical Properties of Selective Laser Melted AlSi10Mg Alloy

Selective laser melting (SLM) is an emerging additive manufacturing technology for fabricating aluminum alloys and aluminum matrix composites. Nevertheless, it remains unclear how to improve the properties of ...

Authors: Yuxin Li, Dongdong Gu, Han Zhang and Lixia Xi

Ocean Observation Technologies: A Review

Covering about three quarters of the surface area of the earth, the ocean is a critical source of sustenance, medicine, and commerce. However, such vast expanse in both surface area and depth, presents myriad ...

Authors: Mingwei Lin and Canjun Yang

Fiber Traction Printing: A 3D Printing Method of Continuous Fiber Reinforced Metal Matrix Composite

A novel metal matrix composite freeform fabrication approach, fiber traction printing (FTP), is demonstrated through controlling the wetting behavior between fibers and the matrix. This process utilizes the fi...

Authors: Xin Wang, Xiaoyong Tian, Qin Lian and Dichen Li

Analysis of Power Matching on Energy Savings of a Pneumatic Rotary Actuator Servo-Control System

When saving energy in a pneumatic system, the problem of energy losses is usually solved by reducing the air supply pressure. The power-matching method is applied to optimize the air-supply pressure of the pne...

Authors: Yeming Zhang, Hongwei Yue, Ke Li and Maolin Cai

Research and Development of Electro-hydraulic Control Valves Oriented to Industry 4.0: A Review

Electro-hydraulic control valves are key hydraulic components for industrial applications and aerospace, which controls electro-hydraulic motion. With the development of automation, digital technology, and com...

Authors: Bing Xu, Jun Shen, Shihao Liu, Qi Su and Junhui Zhang

Numerical Investigation on Fracture Initiation Properties of Interface Crack in Dissimilar Steel Welded Joints

Fracture toughness property is of significant importance when evaluating structural safety. The current research of fracture toughness mainly focused on crack in homogeneous material and experimental results. ...

Authors: Longfei Zhao, Chendong Shao, Yasuhito Takashima, Fumiyoshi Minami and Fenggui Lu

Prediction of Leakage from an Axial Piston Pump Slipper with Circular Dimples Using Deep Neural Networks

Oil leakage between the slipper and swash plate of an axial piston pump has a significant effect on the efficiency of the pump. Therefore, it is extremely important that any leakage can be predicted. This stud...

Authors: Özkan Özmen, Cem Sinanoğlu, Abdullah Caliskan and Hasan Badem

An Overview of Bearing Candidates for the Next Generation of Reusable Liquid Rocket Turbopumps

There is a consensus in the aerospace field that the development of reusable liquid rockets can effectively reduce the launch expense. The pursuit of a long service life and reutilization highly depends on the...

Authors: Jimin Xu, Changhuan Li, Xusheng Miao, Cuiping Zhang and Xiaoyang Yuan

Experimental Research on the Dynamic Lubricating Performance of Slipper/Swash Plate Interface in Axial Piston Pumps

The interface between the slipper/swash plate is one of the most important frication pairs in axial piston pumps. The test of this interface in a real pump is very challenging. In this paper, a novel pump prot...

Authors: Junjie Zhou, Jichen Zhou and Chongbo Jing

Mass-Spring-Damping Theory Based Equivalent Mechanical Model for Cylindrical Lithium-ion Batteries under Mechanical Abuse

An equivalent mechanical model with the equivalent physical meaning of mass-spring-damping is proposed for cylindrical lithium-ion batteries through experiments and theory. The equivalent mechanical model of a...

Authors: Wenwei Wang, Yiding Li, Cheng Lin and Sheng Yang

Discerning Weld Seam Profiles from Strong Arc Background for the Robotic Automated Welding Process via Visual Attention Features

In the robotic welding process with thick steel plates, laser vision sensors are widely used to profile the weld seam to implement automatic seam tracking. The weld seam profile extraction (WSPE) result is a c...

Authors: Yinshui He, Zhuohua Yu, Jian Li, Lesheng Yu and Guohong Ma

Surface Quality Improvement in Machining an Aluminum Honeycomb by Ice Fixation

A honeycomb structure is widely used in sandwich structure components in aeronautics and astronautics; however, machining is required to reveal some of its features. In honeycomb structures, deficiencies, such...

Authors: Yongqing Wang, Yongquan Gan, Haibo Liu, Lingsheng Han, Jinyu Wang and Kuo Liu

Dynamic Analysis and Performance Verification of a Novel Hip Prosthetic Mechanism

To assist an amputee in regaining his or her daily quality of life, based on analysis of the motion characteristics of the human hip, a 2-UPR/URR parallel mechanism with a passive limb was designed. The inverse k...

Authors: Majun Song, Sheng Guo, Xiangyang Wang and Haibo Qu

A Fast Multi-tasking Solution: NMF-Theoretic Co-clustering for Gear Fault Diagnosis under Variable Working Conditions

Most gear fault diagnosis (GFD) approaches suffer from inefficiency when facing with multiple varying working conditions at the same time. In this paper, a non-negative matrix factorization (NMF)-theoretic co-...

Authors: Fei Shen, Chao Chen, Jiawen Xu and Ruqiang Yan

Flow Resistance Modeling for Coolant Distribution within Canned Motor Cooling Loops

Taylor–Couette–Poiseuille (TCP) flow dominates the inner water-cooling circulation of canned motor reactor coolant pumps. Current research on TCP flow focuses on torque behaviors and flow regime transitions th...

Authors: Shengde Wang, Zhenqiang Yao and Hong Shen

Kinematic and Dynamic Analysis of a 3-PRUS Spatial Parallel Manipulator

Parallel Kinematic Machines (PKMs) are being widely used for precise applications to achieve complex motions and variable poses for the end effector tool. PKMs are found in medical, assembly and manufacturing ...

Authors: Mervin Joe Thomas, M. L. Joy and A. P. Sudheer

Progress in Thermomechanical Analysis of Friction Stir Welding

This article reviews the status of thermomechanical analysis of the friction stir welding (FSW) process for establishing guidelines for further investigation, filling the available research gaps, and expanding...

Authors: Bahman Meyghani and Chuansong Wu

Research Review of Principles and Methods for Ultrasonic Measurement of Axial Stress in Bolts

Bolts are important fasteners indispensable in the manufacturing field for their advantages, which include convenient assembly and disassembly, easy maintenance, refastenability to prevent looseness, and the a...

Authors: Qinxue Pan, Ruipeng Pan, Chang Shao, Meile Chang and Xiaoyu Xu

Automatic Scallion Seedling Feeding Mechanism with an Asymmetrical High-order Transmission Gear Train

The current automatic scallion-transplanting machine is a complicated mechanism composed of two linkage mechanisms and two band carriers. It delivers seedlings inefficiently because of the movement limitations...

Authors: Xiong Zhao, Jun Ye, Mengyan Chu, Li Dai and Jianneng Chen

Application of Uniform Experimental Design in Optimizing Excitation Parameters for Magnetic Frequency Mixing Measurements

Excitation parameter preferences are key factors affecting the performance of magnetic frequency mixing detection. A uniform experimental design method was used to analyze this influence. Using fuzzy theory, a...

Authors: Yu Chang, Jingpin Jiao, Xiucheng Liu, Guanghai Li, Cunfu He and Bin Wu

Particle Swarm Optimization-Support Vector Machine Model for Machinery Fault Diagnoses in High-Voltage Circuit Breakers

According to statistic data, machinery faults contribute to largest proportion of High-voltage circuit breaker failures, and traditional maintenance methods exist some disadvantages for that issue. Therefore, ...

Authors: Xiaofeng Li, Shijing Wu, Xiaoyong Li, Hao Yuan and Deng Zhao

Simple Push-Type Wave Generating Method Using Digital Rotary Valve Control

The important parameters to describe waves are their amplitude and length. In order to make it easier to improve wave amplitude and facilitate wave experiment, a simple push-type wave generating method using d...

Authors: Yi Liu, Jiafei Zheng, Ruiyin Song, Qiaoning Xu, Junhua Chen and Fangping Huang

Smoothing Parametric Design of Addendum Surfaces for Sheet Metal Forming

The manual design of addendum surfaces on common CAD platforms is very tedious which requires many trials-corrections, which will certainly affect the construction efficiency and quality of addendum surfaces, ...

Authors: Jixing Li, Tao Ning, Ping Xi, Bifu Hu, Tian Wang and Jiong Yang

Flexible Bio-tensegrity Manipulator with Multi-degree of Freedom and Variable Structure

Conventional manipulators with rigid structures and stiffness actuators have poor flexibility, limited obstacle avoidance capability, and constrained workspace. Some developed flexible or soft manipulators in ...

Authors: Dunwen Wei, Tao Gao, Xiaojuan Mo, Ruru Xi and Cong Zhou

A Computational Synthesis Approach of Mechanical Conceptual Design Based on Graph Theory and Polynomial Operation

The design synthesis is the key issue in the mechanical conceptual design to generate the design candidates that meet the design requirements. This paper devotes to propose a novel and computable synthesis app...

Authors: Lin Han, Geng Liu, Xiaohui Yang and Bing Han

Kinematic Sensitivity Analysis and Dimensional Synthesis of a Redundantly Actuated Parallel Robot for Friction Stir Welding

Friction stir welding (FSW) has been widely applied in many fields as an alternative to traditional fusion welding. Although serial robots can provide the orientation capability required to weld along curved s...

Authors: Xinxue Chai, Ningbin Zhang, Leiying He, Qinchuan Li and Wei Ye

Distribution Performance Analysis and Experimental Research on the Port Plate Pairs of Low Speed High Torque Seawater Hydraulic Motor

The current research of seawater hydraulic motor mainly focused on piston motor and vane motor, but seldom regarded low speed high torque seawater hydraulic motor. Low speed high torque seawater hydraulic moto...

Authors: Zhiqiang Wang, Shaofeng Wu, Dianrong Gao and Shuncai Wang

Research on the Structural Rigidity Characteristics of a Reconfigurable TBM Thrust Mechanism

To improve the adaptability of TBMs in diverse geological environments, this paper proposes a reconfigurable Type-V thrust mechanism (V-TM) with rearrangeable working states, in which structural stiffness can ...

Authors: Younan Xu, Xinjun Liu and Jiyu Xu

Characteristics of Eddy Current Attenuation and Thickness Measurement of Metallic Plate

In eddy current testing, the law of attenuation of eddy current (EC) is of great concern. In conductive half space under the excitation of uniform magnetic field, the EC density decreases exponentially in the ...

Authors: Zhiwei Zeng, Pengcheng Ding, Jiayi Li, Shaoni Jiao, Junming Lin and Yonghong Dai

Capacitive Imaging Technique for the Inspection of Composite Sucker Rod

Composite sucker rod has been extensively used due to its high strength, light weight and corrosion resistive nature. However, such composite sucker rod is difficult for conventional non-destructive evaluation...

Authors: Kefan Wang, Xiaokang Yin, Chen Li, Wei Li and Guoming Chen

Caution to Apply Magnetic Barkhausen Noise Method to Nondestructive Evaluation of Plastic Deformation in Some Ferromagnetic Materials

Magnetic Barkhausen Noise (MBN) method is known as an effective nondestructive evaluation (NDE) method for evaluation of residual stress in ferromagnetic materials. Some studies on the feasibility of the MBN m...

Authors: Manru He, Takanori Matsumoto, Tetsuya Uchimoto, Toshiyuki Takagi, Hongen Chen, Shejuan Xie and Zhenmao Chen

A New System to Evaluate Comprehensive Performance of Hard-Rock Tunnel Boring Machine Cutterheads

The accurate performance evaluation of a cutterhead is essential to improving cutterhead structure design and predicting project cost. Through extensive research, this paper evaluates the performance of a tunn...

Authors: Ye Zhu, Wei Sun, Junzhou Huo and Zhichao Meng

A Numerical Method for Extrication Characteristics of TBM Cutter-Head with the HVC

Achieving highly efficient extrication of the tunnel boring machine (TBM) cutter-head driving system from the collapsed surrounding rock has become a key problem globally, and significant effort has been direc...

Authors: Huasheng Gong, Haibo Xie and Huayong Yang

Nonlinear Static and Dynamic Stiffness Characteristics of Support Hydraulic System of TBM

Full-face hard rock tunnel boring machines (TBM) are essential equipment in highway and railway tunnel engineering construction. During the tunneling process, TBM have serious vibrations, which can damage some...

Authors: Jianfeng Tao, Junbo Lei, Chengliang Liu and Wei Yuan

Power Matching and Energy Efficiency Improvement of Hydraulic Excavator Driven with Speed and Displacement Variable Power Source

Mobile machinery energy efficiency and emission pollution are the national and worldwide issues. This paper contributes in solving these problems by applying a speed variable power source. Unfortunately, almos...

Authors: Lei Ge, Long Quan, Xiaogang Zhang, Zhixin Dong and Jing Yang

On the Loads for Strength Design of Cutterhead of Full Face Rock Tunnel Boring Machine

Cutterhead loads are the key mechanical parameters for the strength design of the full face hard rock tunnel boring machine (TBM). Due to the brittle rock-breaking mechanism, the excavation loads acting on cut...

Authors: Meidong Han, Zongxi Cai and Chuanyong Qu