Articles

Type Design and Behavior Control for Six Legged Robots

The research on legged robots attracted much attention both from the academia and industry. Legged robots are multi-input multi-output with multiple end-effector systems. Therefore, the mechanical design and c...

Authors: Ling Fang and Feng Gao

City-Bus-Route Demand-based Efficient Coupling Driving Control for Parallel Plug-in Hybrid Electric Bus

Recently, plug-in hybrid electric bus has been one of the energy-efficient solutions for urban transportation. However, the current vehicle efficiency is far from optimum, because the unpredicted external driv...

Authors: Qin-Pu Wang, Chao Yang, Ya-Hui Liu and Yuan-Bo Zhang

Noise Reduction of an Axial Piston Pump by Valve Plate Optimization

Current researches mainly focus on the investigations of the valve plate utilizing pressure relief grooves. However, air-release and cavitation can occur near the grooves. The valve plate utilizing damping hol...

Authors: Shao-Gan Ye, Jun-Hui Zhang and Bing Xu

Plastic Deformation Mechanism in Double-Roller Clamping Spinning of Flanged Thin-Walled Cylinder

Double-roller clamping spinning (DRCS) is a new process for forming a thin-walled cylinder with a complex surface flange. The process requires a small spinning force, and can visibly improve forming quality an...

Authors: Shu-Qin Fan, Sheng-Dun Zhao and Chao Chen

Design and Analysis for a Three-Rotational-DOF Flight Simulator of Fighter-Aircraft

Most of researchers focused on traditional six degrees of freedom (DOF) Stewart flight simulator, which can not be adaptive in fighter-aircraft flight simulator. A three rotational DOF flight simulator of figh...

Authors: Chang-Chun Zhou and Yue-Fa Fang

Analysis and Optimization of a Spatial Parallel Mechanism for a New 5-DOF Hybrid Serial-Parallel Manipulator

Hybrid manipulators have potentially application in machining industries and attract extensive attention from many researchers on the basis of high stiffness and high dexterity. Therefore, in order to expand t...

Authors: Dong-Sheng Zhang, Yun-Dou Xu, Jian-Tao Yao and Yong-Sheng Zhao

Experimental Investigation on Cooling/Heating Characteristics of Ultra-Thin Micro Heat Pipe for Electric Vehicle Battery Thermal Management

Due to the heat pipes’ transient conduction, phase change and fluid dynamics during cooling/heating with high frequency charging/discharging of batteries, it is crucial to investigate in depth the experimental...

Authors: Fei-Fei Liu, Feng-Chong Lan, Ji-Qing Chen and Yi-Gang Li

Experimental Study on Wear Performance and Oil Film Characteristics of Surface Textured Cylinder Liner in Marine Diesel Engine

It is of a vital importance to reduce the frictional losses in marine diesel engines. Advanced surface textures have provided an effective solution to friction performance of rubbing pairs due to the rapid dev...

Authors: Zhi-Wei Guo, Cheng-Qing Yuan, Xiu-Qin Bai and Xin-Ping Yan

3D Progressive Damage Based Macro-Mechanical FE Simulation of Machining Unidirectional FRP Composite

Finite element (FE) simulation is a powerful tool for investigating the mechanism of machining fiber-reinforced polymer composite (FRP). However in existing FE machining simulation works, the two-dimensional (...

Authors: Yan-Li He, Joao-Paulo Davim and Hong-Qian Xue

Parameter Optimization of a Stability-Training Platform’s 4-PSS/PS Parallel Mechanism Based on Training Ability Evaluation Index and PSO Algorithm

The existing mechanism parameter optimization (MPO) method of parallel mechanisms only considers the workspace size and ignores contribution of each configuration’s performance. So a novel MPO method is propos...

Authors: Wei-Guo Wu and Li-Yang Gao

Response Sensitivity to Design Parameters of RV Reducer

Dynamic characteristic significantly affects performance of RV reducer. The current researches mainly pay attention to free vibration properties of RV reducer. In order to satisfy the increasing demand on high...

Authors: Yu-Hu Yang, Chuan Chen and Shi-Yu Wang

Influence of Endwall Boundary Layer Suction on the Flow Fields of a Critically Loaded Diffusion Cascade

Boundary layer suction is an effective method used to delay separations in axial compressors. Most studies on boundary layer suction have focused on improving the performance of compressors, whereas few studie...

Authors: Zhi-Yuan Cao, Bo Liu and Ting Zhang

Reliability Assessment for the Solenoid Valve of a High-Speed Train Braking System under Small Sample Size

Reliability assessment of the braking system in a high-speed train under small sample size and zero-failure data is very important for safe operation. Traditional reliability assessment methods are only perfor...

Authors: Jian-Wei Yang, Jin-Hai Wang, Qiang Huang and Ming Zhou

Modification of Roll Flattening Analytical Model Based on the Plane Assumption

Roll flattening is an important component in the roll stack elastic deformation, which has important influence on controlling of the strip crown and flatness. Foppl formula and semi-infinite body model are the...

Authors: Tao Wang, Qing-Xue Huang, Hong Xiao and Xiang-Dong Qi

An Experimental Study of Features Search under Visual Interference in Radar Situation-Interface

As was found through information interface analysis of target search in fighter radar situation environment, there are many of visual attention problems caused by complex environment and features, which genera...

Authors: Xiao-Li Wu, Jing Li and Feng Zhou

A Finite and Instantaneous Screw Based Approach for Topology Design and Kinematic Analysis of 5-Axis Parallel Kinematic Machines

Unifying the models for topology design and kinematic analysis has long been a desire for the research of parallel kinematic machines (PKMs). This requires that analytical description, formulation and operatio...

Authors: Tao Sun, Shuo-Fei Yang, Tian Huang and Jian S. Dai

Parameters Sensitivity Characteristics of Highly Integrated Valve-Controlled Cylinder Force Control System

Nowadays, a highly integrated valve-controlled cylinder (HIVC) is applied to drive the joints of legged robots. Although the adoption of HIVC has resulted in high-performance robot control, the hydraulic force...

Authors: Kai-Xian Ba, Bin Yu, Xiang-Dong Kong, Chun-He Li, Qi-Xin Zhu, Hua-Long Zhao and Ling-Jian Kong

Light-Weight Design Method for Force-Performance-Structure of Complex Structural Part Based Co-operative Optimization

A light-weight design method of integrated structural topology and size co-optimization for the force-performance-structure of complex structural parts is presented in this paper. Firstly, the supporting funct...

Authors: Ya-Li Ma, Jian-Rong Tan, De-Lun Wang and Zi-Zhe Liu

Methods for Detection of Subsurface Damage: A Review

Subsurface damage is easily induced in machining of hard and brittle materials because of their particular mechanical and physical properties. It is detrimental to the strength, performance and lifetime of a m...

Authors: Jing-fei Yin, Qian Bai and Bi Zhang

Fault Feature Extraction of Diesel Engine Based on Bispectrum Image Fractal Dimension

Fault feature extraction has a positive effect on accurate diagnosis of diesel engine. Currently, studies of fault feature extraction have focused on the time domain or the frequency domain of signals. However...

Authors: Jian Zhang, Chang-Wen Liu, Feng-Rong Bi, Xiao-Bo Bi and Xiao Yang

An Error Equivalent Model of Revolute Joints with Clearances for Antenna Pointing Mechanisms

Joint clearances in antenna pointing mechanisms lead to uncertainty in function deviation. Current studies mainly focus on radial clearance of revolute joints, while axial clearance has rarely been taken into ...

Authors: Quan Liu, Sheng-Nan Lu and Xi-Lun Ding

Optimization of Uncertain Structures with Interval Parameters Considering Objective and Feasibility Robustness

For the purpose of improving the mechanical performance indices of uncertain structures with interval parameters and ensure their robustness when fluctuating under interval parameters, a constrained interval r...

Authors: Jin Cheng, Zhen-Yu Liu, Jian-Rong Tan, Yang-Yan Zhang, Ming-Yang Tang and Gui-Fang Duan

Design by Analogy: Achieving More Patentable Ideas from One Creative Design

A patent is a kind of technical document to protect intellectual property for individuals or enterprises. Patentable idea generation is a crucial step for patent application and analogy is confirmed to be an e...

Authors: Li-Zhen Jia, Chun-Long Wu, Xue-Hong Zhu and Run-Hua Tan

Special Issue on Innovative Design of Complex Products

Authors: Jian-Rong Tan

Configuration Design of an Under-Actuated Robotic Hand Based on Maximum Grasping Space

Capture is a key component for on-orbit service and space debris clean. The current research of capture on-orbit focuses on using special capture devices or full-actuated space arms to capture cooperative targ...

Authors: Shang-Ling Qiao, Rong-Qiang Liu, Hong-Wei Guo, Yu-Xuan Liu and Zong-Quan Deng

Personalization for Massive Product Innovation Using Open Architecture

Product innovation is creation of new concepts to plan and realize technological and functional details in the product to satisfy market and customer needs. One of the key drivers to product innovation is reac...

Authors: Qing-Jin Peng, Yun-Hui Liu, Jian Zhang and Pei-Hua Gu

Design and Experiment of Triangular Prism Mast with Tape-Spring Hyperelastic Hinges

Because of the limited space of the launch rockets, deployable mechanisms are always used to solve the phenomenon. One dimensional deployable mast can deploy and support antenna, solar sail and space optical c...

Authors: Hui Yang, Hong-Wei Guo, Yan Wang, Rong-Qiang Liu and Meng Li

Vibration Response and Stress Analysis of Planar Elastic Tube Bundle Induced by Fluid Flow

Flow-induced vibration plays a positive role on heat transfer enhancement. Meanwhile, it is also a negative factor for fatigue strength. Satisfying the fatigue strength is the primary prerequisite for heat tra...

Authors: De-Rong Duan, Pei-Qi Ge, Wen-Bo Bi and Yan-Ying Dong

Optimization Design and Performance Analysis of Vehicle Powertrain Mounting System

The design strategies for powertrain mounting systems play an important role in the reduction of vehicular vibration and noise. As stiffness and damping elements connecting the transmission system and vehicle ...

Authors: Han Zhou, Hui Liu, Pu Gao and Chang-Le Xiang

Quasi-Static and Dynamic Behaviors of Helical Gear System with Manufacturing Errors

Time-varying mesh stiffness (TVMS) and gear errors include short-term and long-term components are the two main internal dynamic excitations for gear transmission. The coupling relationship between the two fac...

Authors: Bing Yuan, Shan Chang, Geng Liu and Li-Yan Wu

Effect of Degree-of-Symmetry on Kinetostatic Characteristics of Flexure Mechanisms: A Comparative Case Study

The current research of kinetostatic characteristics in flexure mechanisms mainly focus on the improvement of accuracy. To reduce or eliminate the parasitic motion is considered as an approach by using the com...

Authors: Xiao-Bing He, Jing-Jun Yu, Wan-Wan Zhang and Guang-Bo Hao

Active Profiling and Polishing Model and Validation Based on Rotor Spiral Groove

When a spiral groove is formed using superplastic molding, precision casting, additive manufacturing, or other non-mechanical processing technology, it is difficult to meet the molding precision required for d...

Authors: Guo Yu, Feng Li, Yong-Min Yu and Shou-Xiang Zai

Application of Fractal Contact Model in Dynamic Performance Analysis of Gas Face Seals

Fractal theory provides scale-independent asperity contact loads and assumes variable curvature radii in the contact analyses of rough surfaces, the current research for which mainly focuses on the mechanism s...

Authors: Song-Tao Hu, Wei-Feng Huang, Xiang-Feng Liu and Yu-Ming Wang

Analysis of the Load-Stress Response Characteristics of the Bogie Frame in Intercity Electric Multiple Unit

Load spectra research for bogie frame requires establishing the load-stress relationship on working condition, which has been omitted by the researchers. With the load-stress of the bogie frame of an intercity...

Authors: Hua Zou, Shou-Guang Sun, Qiang Li and Zun-Song Ren

Fuzzy Sliding Mode Control for the Vehicle Height and Leveling Adjustment System of an Electronic Air Suspension

The accurate control for the vehicle height and leveling adjustment system of an electronic air suspension (EAS) still is a challenging problem that has not been effectively solved in prior researches. This pa...

Authors: Xiao-Qiang Sun, Ying-Feng Cai, Chao-Chun Yuan, Shao-Hua Wang and Long Chen

Life Distribution Transformation Model of Planetary Gear System

Planetary gear systems have been widely used in transportation, construction, metallurgy, petroleum, aviation and other industrial fields. Under the same condition of power transmission, they have a more compa...

Authors: Ming Li, Li-Yang Xie, Hai-Yang Li and Jun-Gang Ren

Numerical Simulation and Experimental Verification of the Stiffness and Stability of Thrust Pad Aerostatic Bearings

Many researchers concentrate on improving the stiffness and stability of aerostatic bearings, however the contradiction between stiffness and stability is still existed. Therefore, orifice, multiple, and porou...

Authors: Hai-Long Cui, Yang Wang, Bao-Rui Wang, Hong Yang and Huan Xia

New Immersed Boundary Method on the Adaptive Cartesian Grid Applied to the Local Discontinuous Galerkin Method

Currently, many studies on the local discontinuous Galerkin method focus on the Cartesian grid with low computational efficiency and poor adaptability to complex shapes. A new immersed boundary method is prese...

Authors: Xu-Jiu Zhang, Yong-Sheng Zhu, Ke Yan and You-Yun Zhang

Leakage and Stiffness Characteristics of Bionic Cluster Spiral Groove Dry Gas Seal

Spiral groove dry gas seal (S-DGS), the most widely used DGS in the world, encounters the problem of high leakage rate and inferior film stability when used in high-speed machinery equipment, which could not b...

Authors: Jin-Bo Jiang, Xu-Dong Peng, Ji-Yun Li and Yuan Chen

Impact of Impeller Stagger Angles on Pressure Fluctuation for a Double-Suction Centrifugal Pump

Pressure fluctuation may cause high amplitude of vibration of double-suction centrifugal pumps, but the impact of impeller stagger angles is still not well understood. In this paper, pressure fluctuation exper...

Authors: Da-Chun Fu, Fu-Jun Wang, Pei-Jian Zhou, Ruo-Fu Xiao and Zhi-Feng Yao

Adaptive Shape Control for Thermal Deformation of Membrane Mirror with In-plane PVDF Actuators

Optical membrane mirrors are promising key components for future space telescopes. Due to their ultra-thin and high flexible properties, the surfaces of these membrane mirrors are susceptible to temperature va...

Authors: Yi-Fan Lu, Hong-Hao Yue, Zong-Quan Deng and Horn-Sen Tzou

Dynamic Accuracy Design Method of Ultra-precision Machine Tool

Ultra-precision machine tool is the most important physical tool to machining the workpiece with the frequency domain error requirement, in the design process of which the dynamic accuracy design (DAD) is indi...

Authors: Guo-Da Chen, Ya-Zhou Sun, Fei-Hu Zhang, Li-Hua Lu, Wan-Qun Chen and Nan Yu

Closed-Form Modeling and Analysis of an XY Flexure-Based Nano-Manipulator

Flexure-based mechanisms are widely utilized in nano manipulations. The closed-form statics and dynamics modeling is difficult due to the complex topologies, the inevitable compliance of levers, the Hertzian c...

Authors: Yan-Ding Qin, Xin Zhao, Bijan Shirinzadeh, Yan-Ling Tian and Da-Wei Zhang

Modeling Method for Flexible Energy Behaviors in CNC Machining Systems

CNC machining systems are inevitably confronted with frequent changes in energy behaviors because they are widely used to perform various machining tasks. It is a challenge to understand and analyze the flexib...

Authors: Yu-Feng Li, Yu-Lin Wang, Yan He, Yan Wang and Shen-Long Lin

Sequential Monte Carlo Method Toward Online RUL Assessment with Applications

Online assessment of remaining useful life (RUL) of a system or device has been widely studied for performance reliability, production safety, system conditional maintenance, and decision in remanufacturing en...

Authors: Ya-Wei Hu, Hong-Chao Zhang, Shu-Jie Liu and Hui-Tian Lu

Crack Fault Classification for Planetary Gearbox Based on Feature Selection Technique and K-means Clustering Method

During the condition monitoring of a planetary gearbox, features are extracted from raw data for a fault diagnosis. However, different features have different sensitivity for identifying different fault types,...

Authors: Li-Ming Wang and Yi-Min Shao

Optimization Study on Expansion Energy Used Air-Powered Vehicle with Pneumatic-Hydraulic Transmission

Pneumatic-hydraulic transmission has been developed for years. However, its dynamic properties are not good enough for application. In this paper, in order to increase the output characteristics, a late-model ...

Authors: Xiang-Heng Fu, Mao-Lin Cai, Yi-Xuan Wang and Yan Shi

Theory and Experimental Verification on Cymbal-shaped Slotted Valve Piezoelectric Pump

Valve piezoelectric pumps usually have larger flow rate than that of valveless ones. However, the traditional cantilever valve easily induces stress concentration which impacts the reliability of pumps. Theref...

Authors: Jun Huang, Yi-Chao Zhu, Wei-Dong Shi and Jian-Hui Zhang

Fabrication of Microlens Array and Its Application: A Review

Microlens arrays are the key component in the next generation of 3D imaging system, for it exhibits some good optical properties such as extremely large field of view angles, low aberration and distortion, hig...

Authors: Wei Yuan, Li-Hua Li, Wing-Bun Lee and Chang-Yuen Chan

Symmetric Equations for Evaluating Maximum Torsion Stress of Rectangular Beams in Compliant Mechanisms

There are several design equations available for calculating the torsional compliance and the maximum torsion stress of a rectangular cross-section beam, but most depend on the relative magnitude of the two di...

Authors: Gui-Min Chen and Larry L. Howell