bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research of Recovery Process of Accident Vehicle Based on FEA
Authors: Dai Jian Guo
Published: October 2010

In this paper, the characteristics and recovery process of accident vehicle are introduced. By using module of modal analysis and fatigue analysis of ANSYS, the natural frequency and fatigue lifetime are worked out before and after repair accident vehicle, the results of calculation can be used to judge the recovery effect. The paper provides an effective theoretical basis to select logical recovery process for accident vehicle.
The Application of Air Pickax in Quicklime Feeding System
Authors: Chen Bing Ming , Yang Feng Xin
Published: October 2010

To solve the problem of unsmooth lime tank feeding which affects waste water treatment, in this paper, we take air pickax as a vibrator to improve the structure and the operation technology of the quicklime baiting system. After testing, we reach the expected effect and the standard. Only by controlling the program on HMI, the improved system can meet the requirement of normal emulsion distribution production and the automation technology. Meanwhile, it guarantees that the uniformity, continuity and stability of the amount of the lime tank feeding to improve productivity.
Optimal Design Methods of Mechanical Product Driven by Key Performance of System
Authors: Hu Ya Hui , Zhang Lian Hong , Wang Shu Xin
Published: October 2010

This paper studied system level optimal design methods of product using the theories of performance requirement-driven. According to the analysis of product performance requirement, firstly, the layered function model is established to realize mapping function to structure. Then, function parameters and their parameter values are used to describe performance model. In this study, we propose optimal designing of mechanical product procedure based on performance requirement-driven. Finally, The 100MN hydraulic pressure machine is used as an example to research the implementation strategies of the key steps in the optimal designing of mechanical product procedure based on performance requirement-driven and the results validate the feasibility of the theoretical modeling.
Light-Strip Model Based Highlight-Line Method for Surface Interrogation
Authors: Yang Bao Guo , Shen H.C. , Zong W.S.
Published: October 2010

A method for surface interrogation named light-strip model based highlight-line technique is proposed. The principium of this method is: taking out a light-strip that includes axial line to replace light-cylinder, making all lines lie in a same light source plane, getting a series of highlight-points on surface by intersecting distance function with different plains, using cubic Hermite interpolation to fit continuous highlight-line cluster passing through those highlight-points. Examples show this method is a comparative ideal surface interrogation technique, it overcomes the shortcoming of light-cylinder model based one as highlight-lines correlating with fiducially line, and the interrogation results cannot reflect the surface fairness of curvature acutely diversification regions.
Reliability Simulation of Mining System for Mechanized Coal Face
Authors: Dong Chun You , Pan Dao Hua , Shi Jian Ting , Liu Xue
Published: October 2010

This paper first analyzes the logical relationship in mining system of fully mechanized coal face and then establishes the system reliability calculation model and simulation model. Based on the running technological data from the mechanized coal face, the authors obtain normal production service distribution and set up equation of monthly output and availability, with which the production and availability are simulated. The test of simulation results on actual condition shows that the simulation method is reliable. This approach contributes to performance evaluation on fully mechanized coal face, improvement on mining system, optimization of mining parameters, equipment modeling and matching. It can also be extended to reliability analysis of other systems.
Classification of Wear Debris Using Weighted Fuzzy Cluster Method
Authors: Peng Dai Qiang , Xu Feng
Published: October 2010

The analysis and identification of wear particles for machine condition monitoring is usually very time-consuming by experienced inspectors. In order to remedy the limitation, automation of the analysis procedure appears to be necessary. A novel weighted fuzzy c-means algorithm for wear particle classification is proposed in this paper. The algorithm uses the variation of the pixel intensities of a region to choose strong resembling area. Then, the spatial relationships of the membership function are constructed to regulate the pixel membership obtained from the FCM object function. Finally, wear debris are classified based on the fuzzy membership. The example shows that the method is briefly and effectively.
Removal of Pb(II) from Aqueous Solution Using Composite Filter Material Made of Fly Ash
Authors: Xue Hong Qin , Liu Xiao Dong , Jing Zhao Qian , Zhao Chen
Published: October 2010

Adsorption of Pb(II) on composite filter material mainly made of fly ash was investigated for the removal of Pb(II) from aqueous solution. Batch experiments have been carried out for adsorption of Pb(II) on to this composite filter material. The effects of various parameters influencing the Pb(II) adsorption such as contact time, initial pH, different dosage of adsorbent and temperature have been studied. Results showed that adsorption equilibrium attained within 60 minutes time. Increase in adsorbent dosage led to increase in Pb(II) adsorption due to increased number of adsorption sites. Adsorption process was found to be highly pH dependent, and the optimum pH range for adsorption of Pb(II) was found to be >8.5. The sorption of Pb(II) increased with rise of temperature.
The Method of the Coal Mining Machine Height Control Based on Magneto-Rheological Tactile Reappearance
Authors: Tang Chun Rui , Zhao Can , Li Hua Jun
Published: October 2010

Through analyzing height character of the coal mining machine, the method of height control of the coal mining machine based on touch sensing technology of magneto-rheological valve is proposed. The controller exports control signal based on extracting current and speed signals of shearer cutting motor and controls touch sensing force feedback based on magneto-rheological valve. The operator can accurate and duly adjust roller height of the coal mining machine. The result of simulations and experiments show that the method is important to avoid the coal mining machine cutting the roof and floor rock and maintain the roof and floor of the formation face, and extend machine life, improve equipment reliability, protect worker safety, improve coal quality. This structure of control method is simple and easy to achieve which has a certain application foreground.
A Research on Management Entropy Model and Its Application in the Process of Business Growth
Authors: Zhang M.L.
Published: October 2010

From creation to the bankrupt of company, it will experience a series of intermediate stages of development. Growth stage is the key one during the process of enterprise’s changing rapidly. With the characters of business growth stage, this pa rise’s changing from weak to strong. In this stage, enterprise rises quickly whose influencing factors are per brings in entropy theory. Based on size, complexity, stability of enterprise, the paper establishes a kind of model of measuring and calculating business management entropy around business size, enterprise capacity and developing speed. The model will supply theoretical direction for decision making activities of business growth stage.
The Artificial Neural Network and Regression Analysis Approach to Prediction of the Fiber Diameter of Spunbonding Fabrics
Authors: Zhao B.
Published: October 2010

In this work, the artificial neural network model and statistical regression model are established and utilized for predicting the fiber diameter of spunbonding nonwovens from the process parameters. The artificial neural network model has good approximation capability and fast convergence rate, which is used in this research. The results show the artificial neural network model can provide quantitative predictions of fiber diameter and yield more accurate and stable predictions than the statistical regression model, which reveals that the artificial neural network model is based on the inherent principles, and it can yield reasonably good prediction results and provide insight into the relationship between process parameters and fiber diameter.
Improving Design of Automobile Drive Axle Housing Base on ABAQUS
Authors: Sang Nan
Published: October 2010

This paper uses Pro/E to establish three-dimensional geometric model of drive axle housing, and then introduces it into ABAQUS for FEA, The analyzing result of ABAQUS software is used to improve drive axle housing. Has not appeared axle housing dehiscence phenomenon according to the ABAQUS software analysis result improvement driving axle housing in the practice, has achieved the improvement design goal.
Design and Testing of the Copper Pipe and Aluminum Pipe Welding Control System
Authors: Zhang Yue , Li Qi Dong , Sun Tai Li , Zhang Xi Chuan
Published: October 2010

The copper - aluminum pipe has been widely used in the refrigeration industry. And the welding quality becomes the focus. A PLC control system was developed to accurately control the resistance welding process of the Cu-Al pipe. The welding voltage was adjusted by a couple of silicon controlled rectifiers (SCR). To restrain the effect of network voltage fluctuation on the welding heat generation, it was obtained that the experimental relationship of the angle of flow and the network voltage, and fitted to a quadratic polynomial equation. Therefore, the control system can calculate the exactly the angle of flow value according to the current network voltage. The experiment results show that the error of the welding heat generation is limited in 5% when the network voltage fluctuates in the range of 380V ±10%. And the SEM and EDS analyzing results suggests that the welding seam length is more than 5mm, and there is hardly eutectic composition.
Analysis of the Milling Distortion due to Residual Stress Based on Analytical Method
Authors: Liu Yuan Wei
Published: October 2010

Formulae of stress re-distribution and distortion by stress releasing during milling process are deduced by elasticity theory. Theory prediction of milling deformation due to residual stress is finished, and some calculating equation is given for the deformation solution. By means of these researches, the mechanism of the milling deformation due to residual stress is analyzed, the machining distortion caused by residual stress are analyzed and summarized using the analytical method.
The Development of a New Type Dissolving Instrument of Gallstone
Authors: Zhu B.Q. , Niu J.Q. , Jin Q.L. , Yu Z.L. , Piao C.H.
Published: October 2010

With the rapid development of economic society, more and more people are suffering from the huge pressure that comes from all aspects. So many kinds of diseases have higher morbidity than before. Among these diseases gallstone is paid more attention because of its generality. To design a new type instrument that can dissolve cholesterin gallstone directly through peristaltic pumps controlled by industry compute and high speed Analog/Digital (A/D) and Digital/Analog (D/A) card. The instrument can regulate the amount of solvent automatically in order to adapt to the cholecyst according to the treatment parameter given by manipulator and the pressure of patients' cholecyst. Meanwhile, the date can be displayed on the screen. The working principle, structure design, hardware and software design have been presented in this paper. The instrument showed a good result both in vitro and in vivo for animals. These tests confirm that the instrument can enhance the efficiency of manual infusing to dissolve a stone and decrease the patients’ pain and sufferings, especially have more significance to the patients who aren't fit for operation and anesthesia. It has the advantages of quick treatment and micro hurt, fitting for clinic use. The new type instrument that can dissolve cholesterin gallstone is a kind of means that can be widespread used with micro hurt.
High Voltage DC Power Supply Used in Electrospinning
Authors: Liu Yuan Yuan , Jing Chang Juan , Hu Qing Xi , Li Qing Wei , Wang Q.G.
Published: October 2010

Power is the direct force in the process of electrospinning, as voltage takes one of the great main roles effecting the quantity of the fiber, making a model of the generater would be in sense to control the morphology.On analysising the working principle,this paper first design a suitable high voltage dc power,and then take an exam in the Simulink environment of Matlab 2009,finally it was certified to be right comparing to the standard situation.
Study on Composite Material Mechanics Model of the Cement Loop Damage Mechanism in Destroyed Casing Well
Authors: Jiang Min Zheng , Dai Yu Xin , Zhou Guang Ling , Cao Yan Peng
Published: October 2010

Based on the rolling restoration ，the fiber-base body mechanics model is established using casing pipe as hollow fiber, cement loop and mother earth as complex base body during the repairing of destroyed casing well. The calculation formula of stress and displacement are deduced in fiber-base body according to the solid mechanics and discussed the effect of some physics quantity to displacement such as friction coefficient by way of calculation, and have deduced the calculation formula of the cement-loop damage length according to the principle of energy balance. Thus discussing the effect of the friction coefficient and degumming power to the damage of cement loop. The practical circumstances of scene indicate that it is reasonable to using this model to research the cement mantle damage mechanism.
Rotor Crack Detection Based on Multi-Vibration Signal Fusion Collected from the Basement of Machinery Using SVM and Statistical Characteristics Methodology
Authors: Li Xue Jun , Wang K. , Jiang Ling Li , Zhang T.
Published: October 2010

As the poor generability of special sensor support frame and the inconvenience of signal acquisition in the process of common fault diagnosis for cracked rotor, a new fault diagnosis method is presented in this paper. this method takes the basement of rotor test rig as the monitoring objects and makes feature fusion for time-domain statistics of multiple sensors using SVM (support vector machine). The result of experiment showed that the method using the multi-sensor signal fusion technology collected from the basement of machinery has the advantages of better diagnostic precision for rotor crack diagnosis, furthermore, it supplies a new way for rotor fault diagnosis.
Research on Feature Extraction Experiment for Acoustic Emission Signal of Rotor Crack Fault
Authors: He Kuan Fang , Li Xue Jun , Li X.C.
Published: October 2010

The acoustic emission extraction experiment of rotor crack fault has done on the rotor comprehensive fault simulation test-bed. Characteristics of acoustic emission signal of different crack rotors in various depth and conditions are analyzed. The noise-disturbing problems and the noise-eliminating methods of the acoustic emission signal were researched in the paper, and the comparison has been done with the vibration method of crack fault diagnosis by the experiment. The advantages of acoustic emission technique has been highlighted in the early period crack fault diagnosis. The wavelet packet technique was applied to obtain the characteristics of acoustic emission signal of the rotor crack propagation. the diagnosis results are shown to be quite clear, reliable and accurate.
Research on Arrangement of Sensors on Rotating Machinery Base Based on ANSYS
Authors: Wu Ji Gang , Li Xue Jun , Yao Bai Hui
Published: October 2010

The faults of rotating machinery are monitored by fixing the sensors on rotor directly, which brings some problems such as difficulty in fixing the sensors, poor universality and so on, while brings some advantages such as rapidness, convenience and good universality and so on by fixing the sensors on the base. The arrangement of sensors on rotating machinery base was designed by taking advantage of the vibration transitivity of rotor-bearing-base, which will provide a new method for fault diagnosis of rotating machinery. The solid model of rotor test bench was built by combining with PROE and ANSYS. The transient analysis of rotor test bench was done, and the vibration response characteristics of base and the arrangement of sensors were obtained. Finally, the validity of the sensor arrangement was verified by experiments.
Mechanical Response of Laminate (Glass/Epoxy) at Different Periods of Environmental Conditioning (Saturation and Ageing)
Authors: Naceri A.
Published: October 2010

This paper considers the analysis of the mechanical behaviour of a laminate constituted of 12 layers of glass fiber fabric/epoxy resin conditioned at different relative humidities of 0, 60 and 96% at 60 °C. The analysing of the experimental results obtained of hygrothermal ageing on the mechanical response has permited to show that the influence of the moisture concentration on the ultimate mechanical properties becomes significant and important for the composite conditioned at relative humidity of 96% to the periods I and II (state of saturation and ageing).
A Heuristic Optimized Algorithm for Energy Optimization in Wireless Sensor Networks
Authors: Yang Zhao Feng , Fan Ai Wan
Published: October 2010

Wireless sensor networks consist of hundreds or thousands of sensor nodes that involve numerous restrictions including computation capability and battery capacity. In this paper we propose an optimal algorithm with genetic algorithm taken into consideration, and compare it with three well known and widely used approaches, i.e., LEACH and LEACH-C, in performance evaluation. Experimental results show that the proposed approach increases the overall network lifetime, and data delivery at the base station than the other routing protocols.
Key words: Wireless sensor networks, base station, heuristic optimized genetic algorithm, low energy adaptive clustering hierarchy
An Improved Elliptic Curve Digital Signature Algorithm
Authors: Fan Ai Wan , Lu Shu Xi
Published: October 2010

In elliptic curve cryptography, reverse-mode operation is the impact on the efficiency of digital signature one of the most important factor. Analysis of the limited domain of elliptic curve digital signature process, to prove the correctness of the algorithm, a non-mode based on the inverse operation of the elliptic curve digital signature algorithm, the algorithm does not reduce the security on the basis of improved algorithms Efficiency.
Research on Adjustment System for Electrohydraulic Proportional Variable Displacement Pump A4VSO
Authors: Ding Hai Gang , Zhao Ji Yun , Zhao Liang
Published: October 2010

To achieve the highly reliable and highly accurate adjustment for electrohydraulic proportional pump A4VSO, an adjustment system is established, in which a servoproportional valve replaces a servo valve or a proportional valve. Then its mathematic model is obtained and simulated on Matlab/Simulink, and performance tests about pump displacement and output flow of the pump are carried out under different pressures. Both simulation and experimental results indicate that the adjustment system controlled by servoproportional valve is characterized by higher steady accuracy and more reliability, both the pump displacement and output flow of the pump A4VSO maintain proportional to the control signal, respectively.
Development of Intelligent Forming Dies with In-Process Defect Detection System for Sheet Products
Authors: Nonaka Tomohiro , Sakata Yutaka , Marumo Yasuo , Okinishi Yoshinori , Horinouchi Taiki , Ogawa Ippei , Watanabe Shinobu
Published: October 2010

In press working, to prevent defects in sheet products and establish the traceability of the causes of defects, we have developed defect detection dies incorporating several types of sensor, including load sensors, fiber laser sensors, ultrasonic sensors and optional sensors. Typical defects such as the rising of pierced scraps, burrs, spring-back/spring-go and wrinkling can be detected using the defect detection dies, i.e., the intelligent forming dies. The real-time defect inspection of all products will be possible. This system can be used to identify defective products on the basis of sensor information compiled in a database. The causes of defects can be clarified from the situation in real time.
Tolerance Allocation and Maintenance Optimal Design for Fixture in Multi-Station Panel Assembly Process
Authors: Cui An , Zhang Hai Peng
Published: October 2010

Traditionally, tolerance and maintenance designs have been studied separately in manufacturing systems. An integration optimization model of tolerance and maintenance for multi-station sheet metal assembly was presented in this work. Based on the variation propagation state space model, a quality loss model of multi-station assembly processes was built. This model considered the effect of process loss. It built the function of fixture tolerance, replacement cycle and total cost. The nonlinear tolerance optimization of locating holes (slots) in multi-station sheet metal assembly was achieved. The optimization model was calculated with practical data in a vehicle body side assembly. Compared with the same type model, it’s verified correct and rational of the model in multi-station sheet metal assembly process quality control.
Baysesian Neural Network Approach to Detecting Temper Embrittlement of 30Cr2MoV Rotor Steels
Authors: Fan Yong Zhe , Ma Rui Na , Du An
Published: October 2010

Baysesian Neural Network approach for predicting the temper embrittlement of steam turbine rotor in service was proposed. The FATT50 (the fracture appearance transition temperature) of the rotors was predicted as a function of ratio of the two peak current densities (Ipr / Ip ) tested by electrochemical potentiodynamic reaction method, temperature of electrolyte, J-factor and grain size ( N ). A database was obtained from the test of electrochemical potentiodynamic reaction and Charpy impact. The Bayesian neural network technique was used for modeling of temper embrittlement. The neural network shows a more precise prediction of temper embrittlement of rotor steels than the prediction using multiple linear regression. The training error and verifying error is with the scatter of ±20°C. The results show that, for the temper embrittlement of rotor steels prediction, the prediction model based on Bayesian neural network is feasible and effective.
Strength Analysis of Dual-Chamber Hydrodynamic Coupling Based on One Way FSI
Authors: Zhang De Sheng , Zhao Ji Yun , Xu Zhan , Wang Zhen Xing
Published: October 2010

In order to improve the accuracy of stress analysis of blade wheels, one way Fluid- Structure Interaction method was introduced based on the comparisons of existing methods. Finite element analysis software ANSYS along with CFD software FLUENT were comprehensively used for the strength analysis of dual-chamber couplings. According to the simulation results from CFD, the node loads at the interface of pump wheel and the working fluid were obtained and the torque and axial force were predicated. Then the static stress of pump wheel was analyzed with ANSYS. The detail processes were described in this paper. The results show that the blades of pump wheel is loaded by alternating forces, and the maximum stress, which is 64MPa, locates at the junction area of the blades and shell. And the coupling analyzed in this study meets the strength requirement.
Research on the Information Extraction of the Whole Machine Simple Model and Characteristics Reproduction
Authors: Wang Qing Fu , Zhao Hong Lin , Wu Zhi Heng , Zhang Guang Peng , Mu Dong Hui , Chen Shi Guang , Zhou Wei Guo
Published: October 2010

The static and dynamic characteristics calculating of the whole machine structure by finite element method lead to dense grid nodes, which is not conducive to rapid quantitative analysis. Therefore, a simplified model and the corresponding static and dynamic characteristics are needed. This paper presents a simplified model using key nodes kept principle and a corresponding software which reads data from resulting data file, extracts information such as coordinates, static and dynamic displacement of relevant nodes from reading data and draws simplified models of the whole machine structure and static and dynamic deformation of it. Take XK173 Vertical Milling Machine as the case research object, establish a complete machine model, analyze the static and dynamic characteristics and reproduce that using simplified model by software. The result shows that the Vertical Milling Machine nodes are reduced from the original 153 238 nodes to156 nodes. It well preserves machine structure and static and dynamic characteristics, and lays foundations for simplifying follow-up quantitative analysis.
An Effective EMD-Based Feature Extraction Method for Boring Chatter Recognition
Authors: Li Xin , Yao Zhe He , Chen Zi Chen
Published: October 2010

Chatter often occurs during precision hole boring, it results in low quality of finished surface and even damages the cutting tool. In order to identify chatter rapidly and gain the precious time for chatter suppression, a chatter monitoring system was established and an effective feature extraction method for boring chatter recognition was presented. According to the characteristic of chatter signal, empirical mode decomposition (EMD) was introduced into chatter feature extraction, and its basic theories were investigated. The vibration signal was decomposed by EMD, then the intrinsic mode functions (IMF) was got. Finally, the feature of chatter symptom was extracted by analyzing the energy spectrum of each IMF. The results show that feature extracted from vibration of boring bar by EMD can indicate chatter outbreak symptom, and it can be used as feature vectors for rapidly recognizing chatter.
Study in the Modeling Methods of Multi-Batch Experiment Data and Technology of Error Correction
Authors: Miao En Ming , Wang Xin , Niu Peng Cheng , Fei Ye Tai
Published: October 2010

This paper analyzed accuracy calibrating methods of multi-batch experiment data with system errors which can not be removed and gave the accuracy assessment parameters of mathematical models. Besides, according to the features of experiment data, this paper presented “median of vertical intercept modeling method” which was used on the accuracy assessment of eddy current sensor, comparing with the traditional modeling method, to obtain optimized mathematical models.
The Composition Kinematic Reliability of Path Mechanism
Authors: Zhang Jun Fu
Published: October 2010

Normally, the kinematic reliability of the path mechanism is the probability of the coordinate components error of position vector of couple point satisfied its allowable error in last literature. Sometimes, it would have more valuable that we study the composition motion reliability. In this work, we present a composition kinematic reliability model for path mechanism, which is a linear combination of non-central chi-square distribution. Then a quadratic form method is used to calculate the failure probability of path mechanism.
Ultrasonic Transducer Design via APDL Optimization
Authors: Zhang Xiang Hui , Li Gui Hua
Published: October 2010

The design of ultrasonic transducer is used to achieve the desired value of terminal vibration amplitude. However, in many practical applications of ultrasonic transducer, the maximum vibration amplitude failed to achieve that value such as ultrasonic machine and bonding. For that matter, the design of ultrasonic transducer used APDL optimization method. In this paper the optimal design of a sandwich ultrasonic transducer is investigated. The design problem is formulated mathematically as a constrained single-objective optimization problem. The maximum vibration amplitude is considered as optimization objective. Design variables involve continuous variables and discrete variables. What is more, the behavior of ultrasonic transducer is modeled using ANSYS based on models of the transfer matrix method. In this paper, the optimized results are analyzed and the vibration amplitude is determined.
An Increment Transfer Matrix Method for the Torsional Vibration Response of Steam Turbo-Generator Shaft System
Authors: He Cheng Bing , Xing Cheng , Shen Jian
Published: October 2010

In order to solve nonlinear system torsion response of turbo-generator unit, an increment transfer matrix method based on step-by-step integration method and traditional transfer matrix method was put forward. The method can be directly used to analyze nonlinear differential equations. Combined with Riccati method, the increment transfer matrix method was used in a multi-mass model. And matrix equations calculating the responses of torsional vibrations were deduced. Torsional vibration resulted from the faults of short circuit and asynchronous synchronization of 600MW steam turbo-generator unit were discussed in this work by using the increment transfer matrix method which can also extend the application of transfer matrix method in nonlinear field.
Simulation on Vibration of Engine Crank-Connecting Rod Mechanism with Manufacturing Errors Using ADAMS
Authors: Shao Yi Min , Wan Liang Hua
Published: October 2010

The present study investigates the dynamic response of single-cylinder reciprocating engines. In particular, simplified models of the crank-connecting rod mechanism are examined, which take into the flexibility of the crankshaft. Crankshaft, connecting rod and piston are major parts of the crank-connecting rod mechanism, and their size, mass, centroid location parameters are required precisely in manufacturing process. However, manufacturing error cannot be avoided completely in practical manufacturing process, and it would lead to different vibration performance of engine. Therefore, understanding the effect of manufacturing error on the vibration performance of engine is the aim of this paper. In order to obtain dynamic characteristics of engine, both rigid and flexible body dynamics simulation were done by using software ADAMS.
Modeling the Horse’s Musculo-Skeletal System: A Step Towards the Design of Bionic Motorcycle Frame
Authors: Shao Yi Min , Simon Rom Li , Gueye Bira Hima
Published: October 2010

In this paper we develope and analyse a 3D model of horse’s musculo-skeletal system as a bionic inspiration which can lead to the design of a cross-country motorcycle frame. Based on the great running and load carrying ability of the horse we were inspired to observe its biomechanical functions, extract useful principles, and simplify the extracted information for modeling. We represent the horse’s musculo-skeletal system by seven cylindrical beams connected together by hinge joints, and then analyze it using ANSYS software. The analysis results shows that the vibration and stress in the model can be minimize by changing the joints between the beams from rigid to hinge joints under different spring bars’ stiffness. This model can provide useful information to improve the functional characteristics of motorcycle frames.
Large Wind Turbine Dynamic Modeling and Simulation
Authors: Wu An , Sun Wen Lei , Wang Ping Ping
Published: October 2010

The system produces strenuous vibration when the wind turbine is operating, it will be a great impact on running precision and components’ life of the whole system, the theoretical study of the research of wind turbine’s vibration is incomplete because of the complexity of the wind turbine’s structure and operating environment, as well as the difficulty of theoretical analysis. In this paper, the FAST established dynamic model of wind turbine, and preliminarily study the establishment of the wind turbine drive system model with multi-body dynamics software, finally dynamic response have been analyzed that based on the establishment of whole wind turbine model, which laid the foundation for wind turbine dynamic characteristic and the system’s optimal design.
Working Space Analysis and Simulation of Modular Service Robot Arm Based on Monte Carlo Method
Authors: He Bin , He Xiao Lin , Han Li Zhi , Cao Jin Tao , Li Ming , Tian Ying Zhong
Published: October 2010

Robot working space is an important kinematic indicator. After the modular service robot arm was introduced, DH coordinate system was used to build kinematics equations of 5-DOFs services robot arm. The whole working space model of the robot system was then established. Monte Carlo method was used to simulate the working space, which can straightforwardly and visually describe the working space of robot with high speed. It was indicated that the working points in the workspace of the robot were distributed compactly and uniformly, which can meet design requirements with high efficiency. The effectiveness of the working space model was testified by the simulation analysis on Matlab and experimental validation.
The Design of Embedded Wireless Monitoring System Based on ZigBee Technology
Authors: Wei Wang Dong
Published: October 2010

The home monitoring system designed in this paper used the combination of a home gateway controller and the ZigBee coordinator, the connection of the ZigBee coordinator and the terminal nodes through wireless mode, to issue the collected real-time data to the Intemet with a web page form, and the dynamic real-time update, so that the intelligent monitoring of the home-based internal environment is achieved. This system overcomes the shortcomings of traditional wired control system, has good currency, high expansibility, and can shorten the intelligent home product development cycle, help to design and develop powerful, cost-effective powerful, cost-effective home products.
Study on the Difference of Frontal Impact Response among People of Different Sizes
Authors: Cao Li Bo , Cui Chong Zhen , Zhu Ning Yu , Chen Huan
Published: October 2010

In this article, seven frontal impact simulation models with same restraint system and different human body models were established through the use of multi-body kinematics software MADYMO. The injuries in head, chest and femurs of different human models and the differences of these injuries were analyzed in detail. The weighted injury criterion was adopted to evaluate the overall injuries of different human body models. The results shows that the injury risk of smaller human body is much higher than the taller human body, and existing occupant restraint system that protects the 50th percentile American occupant well protects other size occupant poorly.
Vibration Qualitative Properties of Nonhomogeneous Membrane
Authors: Wu Lei , Wang Qi Shen , Wang Da Jun
Published: October 2010

Some qualitative properties are discussed about the transverse vibration of nonhomogeneous rectangular membrane whose mass changes only along one direction. The oscillating property of nonhomogeneous rectangular membrane is presented. The distinct property of frequency spectrum and the distribution rule about the node line of modal function are also proved.
Study on Joint Characteristics and the Stability of the Flexible Manipulator Considering the Control Performance
Authors: Shen Wei Guo , Yun Jin Tian
Published: October 2010

For flexible manipulator, the analysis of the joint characteristics and the stability become very important for controller design. The boundary conditions of the flexible manipulator with noncollocated P controller and collocated P controller are developed in this paper. And the stability of the flexible manipulator is also discussed.
Research on Low Temperature Performance of Epoxy Asphalt Mixture
Authors: Luo Sang , Qian Zhen Dong
Published: October 2010

Low-temperature cracking is a significant and costly problem for pavement on the orthotropic steel deck. As a popular material used on the steel deck pavement, the low-temperature performance of epoxy asphalt mixture was investigated. In this research, the three-point bending test, the thermal stress restrained specimen test (TSRST) and the coefficient of thermal contraction test were conducted to achieve the flexural strain energy, the fracture temperature, and the coefficient of thermal contraction respectively. Test results show that epoxy asphalt mixture performs excellently on low-temperature properties and has a prominent deformation compliance with the steel deck. Findings from the research indicate that epoxy asphalt mixture is an alternative material paved on the orthotropic steel deck due to its profound low-temperature performance.
Determination the Modifier Content in SBS Modified Asphalt Based on Infrared Spectroscopy Technique
Authors: Zhong Ke , Cao Dong Wei , Luo Sang
Published: October 2010

SBS modified asphalt is widely used in pavement engineering in China, since it has excellent performances both in high-temperature and low-temperature stability. However, there is no effective method to determinate the modifier in the SBS modified asphalt at home and abroad, causing that there is no efficient methold to manage and monitor the modified asphalt’s quality. This paper mainly introduces the method to determinate the modifier content in SBS modified asphalt qualitatively and quantitatively, using infrared spectroscopy technique.
Influence of Micro-Addition Chromium on the Valence Electron Structure and Toughness of Fe2B Phase
Authors: Ma Rui Na , Fan Yong Zhe , Cao Xiao Ming , Wen Ming
Published: October 2010

Fe2B is a kind of typical intermetallic compound, which has good corrosion resistance in molten zinc. However, the fatal intrinsic brittleness limits its further application in the Hot-Dip Galvanizing Industry. Therefore, it is worthwhile to improve the toughness of Fe2B phase. In this study, the fracture toughness property of Fe2B phase with and without micro-addition chromium is investigated. In comparison with pure Fe2B phase, the intrinsic brittleness of Fe2B phase with chromium is lower. In addition, the valence electron structure of Fe2B containing various chromium content is calculated by the method of bond length difference (BLD). The results show that, in the (Fe1-x Crx)2B phase, the number of covalent electron pairs and the weaker bond energy are increased by the substituting atom-Cr. The calculated results are in good agreement with experimental observations.
Investigation on Harmonic Response of Pneumatic Vibration Isolation System with Single and Double-Frequency Excitations
Authors: Zhong Yan Chun , Yang Qing Jun , Bao Gang
Published: October 2010

In this paper, a nonlinear model of pneumatic vibration isolator was established, considering the volumetric compressibility of air. Based on this, simulation analyses were done using matlab/simulink software. The response to two different types of disturbances is studied: single-frequency excitation and double-frequency excitation. Single-frequency excitation can induce harmonic frequency response and offset response at the zero frequency. When the frequency is near to the the linearized natural frequency, the harmonic frequency response become stronger. Nonlinear characters have much to do with the drive amplitude. When the drive amplitude become large, the nonlinear characters are more obvious. Double-frequency excitation can induce combination resonance. When the two drive frequencys are close, combination resonance are more strong.
Surface Texture’s Role in Assessing Surface Integrity of Machined Parts
Authors: Zeng Quan Ren , Liu Geng , Liu Lan , Tong Rui Ting
Published: October 2010

Surface texture, as one of the typical surface integrity characteristics, plays a vital part in efficiently and systematically evaluating the surface integrity and relevant mechanical properties of machined parts. Commonly used 2D surface roughness parameters are formularized and discussed in this paper. And 3D characterization technique is also illustrated through measuring and describing a machined surface with an optical profiling system. The relationship between surface texture and the fatigue property of final machined parts are discussed by employing the quantity of effective stress concentration factor which could be expressed by the standard surface roughness parameters and measured averaged root radius of surface texture’s valleys. This research emphasizes the indispensable role of the surface texture in evaluating surface integrity and corresponding functional performance of machined parts.
RFID-Based Optimization Method for Inventory Control Strategy
Authors: Wu You Bo , Tao Yi , Pan Xiao Hong , Wu Peng Cheng
Published: October 2010

As the market competition became more fiercely and the customers’ needs of diversified products increased, small and medium enterprises (SME) were more and more aware of the importance of getting quick respond of the market. More and more enterprises felt the logistics cost pressure during this business. How to lower down the logistics cost especially the stock cost became crucial for these SME enterprises. Further more, for enterprises whose producing type is many varieties small batches, how to use valid method to decline inventory and waste, is a great hard nut to crack. This article targeted on inventory control of clothing manufacturing enterprises for research, RFID technology was applied in stock management, optimization method was adopted for inventory control based on RFID, optimization control model was built, and the route for declined inventory cost and waste was analyzed. Finally, the application method was verified according emulation.
Application of Reverse Engineering Technology in Constructing Prototype Surface
Authors: Yu Dong Man , Li Xiao Jing , Xiong Yi , Gao Zhi Hua
Published: October 2010

Reverse engineering (RE) plays an important role in accelerating product research and borrowing ideals from other manufacturers. This paper describes the whole RE process from origin point acquisition to data processing for better point quality. Based on RE system of a toy prototype, a fine surface reconstruction module is developed. Measurement data are acquired by scanning the physical object using three-dimensional coordinate measuring machine (CMM) and an optical scanning device. After the establishment of the model, data process for prototype, includes noise elimination, data interpolation, data smoothing, data filtering, data splicing and surface reconstructing, are conducted subsequently. Through processing of measurement data, the authors succeed in creating a CAD model and fabrication of the product in stereo lithography apparatus (SLA) machine.
User’s Preference Aggregation Based on Parallel Interactive Genetic Algorithms
Authors: Guo Yi Nan , Lin Yong , Yang Mei , Zhang Shu Guo
Published: October 2010

In traditional interactive genetic algorithms, high-quality optimal solution is hard to be obtained due to small population size and limited evolutional generations. Aming at above problems, a parallel interactive genetic algorithm based on knowledge migration is proposed. During the evolution, the number of the populations is more than one. Evolution information can be exchanged between every two populations so as to guide themselves evolution. In order to realize the freedom communication, IP multicast is adopted as the transfer protocol to find out the similar users instead of traditional TCP/IP communication mode. Taken the fashion evolutionary design system as test platform, the results indicate that the IP multicast-based parallel interactive genetic algorithm has better population diversity. It also can alleviate user fatigue and speed up the convergence.
Performance of Wood-Polymer Composite Prepared by In Situ Synthesis of Terpolymer within Wood
Authors: Li Yong Feng , Wang Bao Gang , Fu Qi Liang , Liu Yi Xing , Dong Xiao Ying
Published: October 2010

In order to improve the value-added applications of low-quality wood, a novel composite, wood-polymer composite, was fabricated by in-situ terpolymerization of MMA, VAc and St within wood porous structure. The structure of the composite and the reaction of monomers within wood were both analyzed by SEM and FTIR, and the mechanical properties were also evaluated. The SEM observation showed that the polymer mainly filled up wood pores, suggesting good polymerizating crafts. The FTIR results indicated that under the employed crafts, three monomers terpolymerized in wood porous structure, and grafted onto wood matrix through reaction of ester group from monomers and hydroxyl group from wood components, suggesting chemical combination between the two phases. The mechanical properties of the wood-polymer composite involving modulus of rupture, compressive strength, wearability and hardness were improved 69%, 68%, 36% and 210% over those of untreated wood, respectively. Such method seems to be an effective way to converting low-quality wood to high-quality wood.
Streaming Potential Induced by Canaliculi Fluid Flow: A Fluid-Filled Thick-Walled Cylinder Osteon Model Subjected to Axial Loading
Authors: Wu Xiao Gang , Chen Wei Yi
Published: October 2010

Based on the physiological structure of osteon, a single fluid-filled osteon model under only time-dependent axial loading is modeled for calculating the streaming potential induced by canaliculi fluid flow. Solid matrix is modeled as an elastic transverse isotropic thick-walled cylinder and fluid phase is considered as an incompressible Newtonian fluid. Close-form solution of the streaming potential for a single osteon model was obtained and used to study the electromechanical properties on intraosseous pressure and potential distribution. The solution can also be used as a benchmark for numerical studies of other osteon models.
Evaluation on Emergency Management System in Supply Chain Based on Trapezoidal Fuzzy Order Weighted Average (FOWA) Operator
Authors: Lu Shan , Zhao Zhong Ping
Published: October 2010

Currently the research has just started in terms of the applications on the multi-attribute decision-making under the situation that the attribute value is defined as the trapezoid fuzzy number, while it is also a new attempt to evaluate the emergency management system in the supply chain by this method. The assessment indicators of the emergency management system in the supply chain are provided in this thesis based on both theoretical and empirical studies. By considering fuzzy uncertainty of the source of the data, FOWA operator is introduced, and the effectiveness and practicality of the indicator system and model are verified through empirical studies. This method is visual, concise and easy to calculate, which yet needs gradual improvement in practical applications.
Empirical Study of the Influencing Factors of Supply Chain Risks
Authors: Lu Shan
Published: October 2010

With the existing research done both at home and abroad, as well as the special situation in China’s supply chain, this paper proposes the structure of supply chain risks and the primary measuring items of the influencing factors based on field interviews, and verifies the scientific attribute of the factors through reliability and validity analysis. In this thesis, supply chain risks mainly contain endogenous risks which include risks of cooperation, purchasing, logistics, management and information, and exogenous risks which include risks of law, policy, sudden disasters and market. Based on this conclusion, further studies can be done in the aspects of evaluation on supply chain risks and the related research.
Optimization Models and Heuristic Method Based on Simulated Annealing Strategy for Traveling Salesman Problem
Authors: Hao Xu
Published: October 2010

The traveling salesman problem (TSP) is a problem in combinatorial optimization studied in operations research and theoretical computer science. In this paper, we presented a novel heuristic simulated annealing algorithm for solving TSP. The algorithm is fully operational in the genetic role of crossover operator, and mutation operator, to achieve a balance between speed and accuracy. The experiment results show that the algorithm is better than the traditional method.