bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Influencing Factors for Stirring Effect of Blender Truck
Authors: Huang Tian Cheng , Zhou Si Zhu , Yuan Xin Mei
Published: August 2011

Stirring system of blender truck as an important equipment of fracturing unit, its stirring effect has great influence on performance of fracturing fluid and fracturing operation of fracturing unit, so it is necessary to study the influencing factors for stirring effect of blender truck. On the basis of the theory of the orthogonal test method and the requirement of the design on the stirring system, the factors and their levels of numerical simulation experiment are confirmed and the orthogonal test scheme is established in this paper. Also the numerical simulation for mixing process of stirring system of the blender truck is carried out with CFD software. The influence degree of the factors on stirring effect is obtained with the range analysis method, the optimal structure size of stirring system is achieved according to this result.
Election Campaign Optimization Algorithm for Design of Pressure Vessel
Authors: Zhang Hong , Lv Wen Ge , Cheng Si Yuan , Luo Shao Ming , Zhang Xiang Wei
Published: August 2011

Election Campaign Optimization algorithm is a new heuristic algorithm, it works by simulating the behavior that the election candidates pursue the highest support in election campaign. In this paper, the problem of optimal designing a pressure vessel is selected to verify the validity of Election Campaign Optimization algorithm. The computing result shows that Election Campaign Optimization algorithm can find the global optimal solutions for design problem.
Magnetic Floating Continuous Casting Process (MFCC) for Molten Metal Afterheat Billet
Authors: Cai Li Ming , Liu Ding Ping
Published: August 2011

Electromagnetic metallurgy is an advanced subject of the production technological research in metallurgical industry. Magnetic floating smelting has already been successfully applied to producing hyperpure metal. No report on using magnetic floating method to continuously cast molten metal into near net shape waste heat processing billet along horizontal direction by one step on line. This article discusses the research and development state and the application prospect of the new technology.
Detection of Fractional Data Based on Hilbert-Huang Transformation
Authors: Li Chu Jin , Wan Jian Ping
Published: August 2011

In many theoretical analysis and engineering application fields, fractional Brownian motions has proposed to be a valuable random excitation due to its' key self-similarity and fractal nature. And Hilbert-Huang transformation is counted as an effective tool to deal with nonlinear and non-stationary data. In this paper, we propose Hilbert-Huang transformation to process fractional data, then by verifying and differentiating the marginal spectrum or power spectrum of fractional data we formulate a stochastic detection scheme.
Deposition of Nanocrystalline TiO2 Films on Flexible Titanium Mesh for Dye-Sensitized Solar Cell
Authors: Kao Kuo Sheng , Kuo Po Hsiang , Cheng Chien Chuan , Cheng Da Long , Wang Chin Ming , Hung Pei Shan
Published: August 2011

This study provides a simple and low cost method to deposit TiO2 nanoporous thin films onto the titanium mesh substrate. The flexible titanium mesh is adopted as electrodes where a novel structure of dye-sensitized solar cell (DSSC) is fabricated. The titanium mesh owns many advantages such as low resistance, cheap and high temperature tolerance. The photoanode is fabricated while the Ti mesh immersed into the alcohol solution of nanopowder of TiO2 (P25). For a better adhesion, several treatments against the titanium mesh are carried out. The photovoltaic parameters of various DSSC are discussed through the observations of TiO2 nanoporous thin films. The alcohol solution of N719 dye is used to sensitized the photovoltaic and the electrolyte is a mixture of 0.5 M LiI, 0.05 M I2 and 0.5 M 4-tert-butyl-pyridine in 3-methoxypropionitrile. With a Xenon illuminating, a flexible cell with Jsc=2.9 mA, Voc=0.5 V and F.F =0.68, η=1.02 % is obtained.
Wear Behavior of Al-Al2O3 Reinforced Composites
Authors: Şahin Yusuf
Published: August 2011

Aluminum composites containing 10wt. % of Al2O3 with 3 µm size of particles have been produced using powder metallurgy (PM) method and wear behavior of the composites were tested under dry condition. A comparison is also made with SiCp reinforced Al composite produced at the same conditions. The wear rate of both types’ composites increased with all applied loads, but wear rate of the composites was a strong function of normal load rather than that of type of particles used for the manufacturing MMCs. Furthermore, the wear rate of Al-Al2O3 composite was smaller than that of Al-SiCp reinforced composite, but not indicating significant differences on it. Moreover, SEM examination showed that plastic deformation was the dominant type of wear for the Al2O3 particle reinforced MMCs, but the fragmented-deformed layer of particles was more effective for the SiCp reinforced MMCs due to more fracturing of particles.
Parameter Inversion of Thin-Walled Structure Using Numerical Optimization Approach
Authors: Meng Zhuo , Sun Qin , Jiang Jin Feng
Published: August 2011

Based on the theory of structure impact dynamic and numerical optimization, application of SQP algorithm in nonlinear parameter inversion is demonstrated in this paper by combining the optimization software and finite element software. Parameter inversion of thin-walled cylinder subjected to axial impact load is studied. The material parameters of thin-walled cylinder are obtained from inversion; besides, the whole process of numerical optimization parameter inversed method is demonstrated.
Geotechnical Parameters of Composite Soil
Authors: Chegenizadeh Amin , Nikraz Hamid
Published: August 2011

Composite soils have been widely used in civil engineering applications, especially in slopes, embankment dam and landfills. This paper aims to investigate effect of fiber inclusion on compaction characteristic of composite soil (i.e. clay composite). A series of laboratory tests carried out to evaluate fiber effect on optimum water content and maximum dry unit weight of composite soils. Clay was selected as soil part of the composite and natural fiber was used as reinforcement. The fiber parameters differed from one test to another, as fiber length varied from 10 mm to 25mm and fiber content were selected as 0.1% and 0.3%. For each test, compaction curved derived and the results were compared. The results proved that inclusion of fiber affected compaction behaviour of samples so that increasing in fiber content and length caused increasing in Optimum Moisture Content (OMC) and slightly decreased maximum dry unit weight.
Prediction and Discuss of Strap Mining Subsidence by Numerical Simulation Analysis and its Engineering Apply
Authors: Xie Fei Hong , Kou Zhi Yong , Zhang Yong Mou
Published: August 2011

In this paper, In order to reasonably determine the mining width and reserves length of strip mining, reliable simulation subsidence due to strip mining under earth，according to the cavity environment of the engineering measure, the protected object's space position and the mining rock strata's circumstance, and the relevant mining subsidence mechanic, calculation model are chosen in order to predicting the designing mining area transform and data sorting after mining. Its function and perform is put into practice for all various aspects of subsidence calculation in visual analysis system of own developed software package. It is applicable to all mining geological conditions and mining methods. Based on the condition of strip and pillar practice of Matigou colliery of Huating Mining Group, It is also applicable to this calculation system to guide successfully mining under river and architectural complex, the accurate estimate forecast had been attained.
Projective Synchronzing a Novel Fractional Hyperchaotic System Based on a Approach Configuring a Special Matrix
Authors: Hu Jian Bing , Xiao Jian , Zhao Ling Dong , Jiang Qiang
Published: August 2011

This work presents a new approach configuring a special matrix to design controller for synchronizing fractional chaotic systems. With this method, fractional chaotic projective synchronization is implemented. Numerical simulations confirm the effectiveness of the approach.
Research on Ultrasonic Compression of Cellulosic Biomass
Authors: He Jian Wen , Fok Chun Chiu , Guo Zhong Ning , Zhang Yong Jun
Published: August 2011

Cellulosic Ethanol was considered to be the most promising alternative energy. For the biomass densification and pre-technical problems during the manufacturing process, we propose a new method concerning ultrasonic compression of cellulosic biomass, which does not need high-temperature steam heating, adding adhesive and high pressure, and it increases 60% of the fiber density and 20% of the sugar ratio through the grinding, ultrasonic compression molding and biomass briquetting.
Research on Behavior and Connotation of Product Design
Authors: Ma Xing Guo , Wen Bang Chun
Published: August 2011

Based on studying design behavior and design thinking, a design behavior model which dealt with person, QCTS (quality, cost, time and service), process and environment in product design was set up. The key factors and connotation of product design were discussed based on the model. An expanded design environments model and a systematic design process model were set up. The results show that person, product, process and environment are key factors of product design; in design, the person is body of thinking, QCTS is goal, the process is behavior formula, and the environment is restraint; the product design is a process driven by customers’ requirements in which the knowledge is used and is materialized based on brain, and abstract or detail concepts are changed to a physical assembly or a product step by step.
Impact of ECFA on Trend of Exchange Rate between NTD and RMB Based on Grey Prediction Model
Authors: Tu Chien Chih , Chen An Pin
Published: August 2011

Beginning from 2001 in which both Taiwan and China joined World Trade Organization (WTO), a large number of Taiwanese manufacturers have moved their plants across Taiwan Straight to China in search for cheaper labor force regardless of the political tensions between two countries. With the gradual easing of cross-strait political tension after the inauguration of pro-China president of Taiwan, the Taiwan Government starting from 2009 has been promoting the "Economic Cooperation Framework Agreement" (ECFA) through which the government claims the cross-strait economic and trade relations could be further enhanced and Taiwan could avoid being “marginalized” from the regional economic system. Additionally, as the two countries gradually lift restrictions on the investment and remove tariff barriers the cross-strait economic is bound to be more closely and the trade exchanges are set to skyrocket. However, since the bilateral trade or investment is generally through the U.S. dollar the fluctuation in currency exchange rate may serve as one of the important factors when the business makes the investment decision. Therefore, this paper applies Grey prediction method of Grey theory to the forecast of the exchange rate between NT dollar and RMB on which Taiwan enterprises could depend when formulating their investment strategies of investing more in China or Taiwan.
Vibration Research on Fork-Lift Truck by Harmonic Analysis
Authors: Yang Ming Liang , Chang Zheng Yan , Xu Ge Ning
Published: August 2011

Aimed at the vibrations of driver seat and wheel of a working fork-lift truck, the acceleration was measured and a vibration analysis based on the finite element method was made. Comparing the finite element analysis result with the result of model test analysis, the finite model is modified with the result of test. The mode analysis is done. The result shows that the fork-lift truck driver seat and wheel frequency is far away from the exciting frequency of engine. The vibration is forced vibration but not resonance.
Reason Analysis of Marine Auxiliary Engine Exhaust Pipe Burned Red
Authors: Zhang Guo Yong , Ren Wei , Wu Shuo , Wang Peng
Published: August 2011

To those old ships, one of the frequent faults is that the exhaust temperature of marine diesel generator is too high. This fault may lead exhaust pipe to be burned red, outlet valve to be burned down, piston and piston ring to be melted, and many other troubles. In this paper, aiming at the reason of fault of NO.1 marine auxiliary diesel engine exhaust pipe burned red while running without load, the author analyzes the every possible causes of the malfunction, finds out the real causation of high exhaust temperature is steady ball bearing of timing gear partial wears seriously. Then, the writer expounds elimination process and solutions, and proposes some suggestions about operation and maintenance in the end.
Dynamic Design of High-Speed Planar Cam with Oscillating Follower
Authors: Wei Zhan , Jin Guo Guang , Chang Bo Yan , Liang Dong
Published: August 2011

The purpose of this paper is to design a smooth and higher-degree polynomial curve for satisfying the need of dynamic features of high-speed cam. In this paper, the dynamic model of cam mechanism is simplified into a single-free-of-degree dynamic model. The dynamic equation in this model can be used to establish the design equation of the cam profile. Finally, a typical cam mechanism is used as a simulating example to validate this dynamic modeling method and the curve obtained from calculation is smooth and can satisfy the requirement of dynamics characteristics.
Principle and Dynamics Simulation Analysis of Varying Strategy of a Novel Variable Diameter Walking Wheel
Authors: Chen Xin Bo , Gao Feng , Yao Sheng Zhuo , Wang Zhe
Published: August 2011

According to structure feature and principle of relying on relative rotation among hubs to realize elastic deformation of elastic spoke and varying diameter of a novel variable diameter walking wheel, finite element model was created based on the theory of continuous collision and the nonlinear contact between the wheel’s caster and ground was defined through introducing mobile marker in SIMPACK software. Dynamics simulation analysis was carried out respectively under two varying diameter strategies of the wheel and get the dynamic response in the mode of changing the diameter in situ and the minimum size of torque needing for varying diameter. The suitable for working condition and varying mode was pointed out via comparative analysis of the simulation’s results, and can provide theoretical basis for further rational design and study.
Research on Fidelity of Driving Simulators
Authors: Li Pei Xin , Wei Yan Ding , Zhou Xiao Jun , Wei Chun Yu , Xie Ming Xiang , Tang Fang
Published: August 2011

Through analyzing the specialty and limitation of the current driving simulators, the main factors affecting fidelity of driving simulators are summarized. Then, a new driving simulator of high fidelity based on the multi-body dynamics is proposed, with focus on the dynamics modeling and the road feel. Furthermore, a control algorithm of the road feel is designed and by the means of co-simulations in MATLAB/Simulink and ADAMS environment, the measuring steering wheel torque proves the control algorithm of road feel is reasonable. The control algorithm has been put into practice and got satisfactory results.
Simulating Sliding Efficiency of Belt Driving Acted on by Bi-Directional Alternating Load
Authors: Dong Shi Min , Xing Ming Ming
Published: August 2011

With the belt driving device which is affected by bi-directional alternating load taken as research object and with the elastic slide between belt and pulley which is caused by elastic deformation of the belt considered, the calculating model of belt instantaneous sliding friction is established. The belt is simplified to elastic body of longitudinal vibration, the mechanical model of the belt longitudinal vibration which is excited by alternating friction is established, and the mathematical model of the wave equation form is established. The numerical simulation model of wave equation is carried out on using the superposition method of mode of vibration. The simulation models of the belt instantaneous sliding velocity and the belt instantaneous sliding efficiency are presented. The factors affecting sliding efficiency are pointed out, such as oscillation amplitude of alternating torque and initial tension of belt. The following conclusions are obtained by the simulating results: (1) load torque fluctuations will lead to lower sliding efficiency; (2) specifically, the sliding efficiency will decrease obviously in the area where the direction of load torque is occurring; (3) on condition that the belt doesn’t skid, the sliding efficiency of the belt reduces with the increase of initial tension, and the sliding efficiency will increase through optimizing the initial tension of belt.
Research on Method of Improving Sound Property of Vacuum Cleaner by Means of Sound Forge Technology
Authors: Yang Li Fang , Ding Wen Jiao
Published: August 2011

Good sound-feeling is more important than noise strength for industrial products, especially for household appliances. In the paper, the control method of good sound-feeling of vacuum cleaner is researched based on the theory of soundscape. For the purpose, a special method of sound forge and evaluation technology (SFET) is utilized. For the method, first the spectrum of vacuum cleaner is analyzed to obtain its spectrum characteristics. Second by means of spectrum forge technology, the frequency spectrum of vacuum cleaner is modified and compiled to make the testing samples. Third based on the sound subjective evaluation, the optimum compiled sound sample of vacuum cleaner is acquired. At last, according to the optimum sound sample, the structure of product is modified to obtain product sound of good-feeling. In the paper, the spectrum of vacuum cleaner noise is analyzed, according to the spectrum, the method of sound forge is discussed. In the end of the paper, the virtual simulation of soundscape of vacuum cleaner is designed by means of some software to give an example of optimizing soudscape.
Study on Characteristics of Cylindrical Air Spring
Authors: Chen Chon , Hu Rong Rong , Huang Lan
Published: August 2011

Based on the theory of fluid dynamics and principle of thermodynamics, the characteristic of the stiffness, natural frequency and damping of cylindrical air spring are deduced. Moreover, simulation model for dynamic characteristic of air spring is established under the environment. The simulation results show the characteristics of cylindrical air spring is superior and the isolation effect is good.
Design Closed-Loop Measurement and Control System of Drilling Rig
Authors: Jiao Yan , Gao Ling , He Si Ming
Published: August 2011

In order to overcome the deficiencies of outdated hydraulic system of drilling rig, The testing drilling system is designed, which provides drilling parameters of inspecting, recording and controlling to meet the need of high power and complex drilling controlling. Meanwhile, the improved incremental PID and the multiple algorithm of Fuzzy-PID realize closed-loop feedback control of drilling pressure and rotary speed, what enhance the control system stability and accuracy, and achieve the sake of good control effect so that the system achieves the targets with speed range from 0 to 160r/min and pressure range from 0 to 20MPa.
A Matrix Representation and Motion Space Exchange Metamorphic Operation
Authors: Li Shu Jun , Dai Jian Sheng
Published: August 2011

The paper presents a matrix representation of mechanical chains based on proposed joint-axis matrix, and a matrix operation of joints orientation change metamorphic processes. A four elements joint-axis matrix with joints types and orientations is developed first, and an augmented adjacency matrix of kinematic chains is formed by adding the elements of joint-axis matrix into the corresponding positions of general adjacency matrix of kinematic chains. Then the matrix operation of metamorphic process is performed through changing the orientation of metamorphic joint of augmented planar mechanism to transform the configuration of the mechanism from planar to spatial one.
Research and Development of an Adjustable Elliptical Exerciser
Authors: Shyu Jenq Huey , Chen Ching Kong , Yu Cheng Chi , Luo Yi Jhong
Published: August 2011

This paper presents a novel design of adjustable elliptical exerciser, which can adjust both stride and inclined angle. Firstly, we use a selected coupler curve of four-bar linkage to design a six-bar linkage. From the six-bar linkage, we investigate the parameters which affect the corresponding elliptical path and its inclined angle. By considering the way of adjusting the inclined angle, the final design becomes a 2-DOF seven-bar-eight-joint linkage. We use SolidWorks software to design this novel elliptical exerciser, and use CAE software to check the stresses and strains to ensure the strength of the members of this design. The prototype of this novel design of adjustable elliptical exerciser has been fabricated, and its feasibility has been confirmed.
Workspace Analysis of New Type Parallel Mechanism with Serial Input
Authors: Jing Peng Lin , Feng Zhi You
Published: August 2011

A new 4 DOF parallel mechanism with serial input limb is presented ——2UPS-RPU parallel mechanism, the limb with serial input is a less contrained active branched-chain,the number of its DOF is less than six,that is to say,the limbs not only transmitting driving force but also constraint force at the same time.Compared with traditional parallel mechanisms,the mechanism with serial input has greater number of DOF than the number of limbs and don’t lose the property of parallel mechanism. The inverse solutions to positions of the mechanism are modeled by inverse kinematic analysis in this paper, then the constraint conditions are established according to factors influencing the workspace of parallel mechanism,such as the limits of the hinge angle and the parallel link length.The workspace of 2UPS-RPU parallel mechanism can be obtained by using exetreme-boundary numerical algorithm in Matlab,the volume of workspace can be quantified by means of computation,and analyzing the impact of rod length ,circumradius of moving and fixed platform and motion pair rotation angle on the workspace.
The Kinematic Influence Coefficient Analysis of a Parallel Stabilized Platform Testing System
Authors: Jiang Fang , Ding Hong Sheng , Fu Tie , Dong Zhong Hui
Published: August 2011

A testing system is constructed by connecting two parallel mechanisms in series to assess the performance of the 6-DOF parallel stabilized platform. In addition, a conception, the kinematic isolation factor, is proposed to describe the capability of the parallel stabilized platform and is combined with the kinematic influence coefficient method to form the first and second order influence coefficient matrixes as well as the velocity and acceleration expressions. The definition of the kinematic isolation factor simplifies the establishment of the kinematic equations, and the acceleration formula especially appears a concise format. These kinematic equations are solved according to a certain turbulence signal of a moving carrier, and the results indicate that the kinematic isolation factor describes the parallel stabilized platform’s capability that it correctly compensates the motion of the carrier and evince that the testing system effectively evaluates the performance of the parallel stabilized platform.
Research on Automatic Replacing Technology of Power Battery Pack
Authors: Wang Zhen Po , Han Hai Bin , Zeng Lu
Published: August 2011

The short driving range and long charging time are two big problems for electric vehicles. A concept of battery pack automatic replacement is put forward in this paper to solve these problems, and a deep research on the key techniques is contained. This paper introduced the way of positioning and locking in replacement process, including the concrete structure of both replacing equipment and battery pack. For reliability problems of the connectors, two schemes are designed. Elastic jacks and coil are adopted to guarantee the reliability and automatically centering. On this basis, battery fast replacing system is designed, which controlled by PLC, driven by electro-hydraulic servo. This was proved to be a big success in practice.
Self-Development Design of Automotive Transmission Based on MASTA Platform
Authors: Tian Yan Lin , He Jing Liang , Niu Hao Long
Published: August 2011

MASTA is the professional CAE software for auto transmission simulation, analysis and design system. Based on this, firstly how to realize the design and optimization of auto transmission assembly is discussed by MASTA system deflection analysis principle, not only are the accuracy of gear strength and modification analyzed through comparison, but also the selection and rating basis of axis and bearing are obtained. In addition, on basis of the full consideration of the whole structure deflection namely the structural flexibility factor, the influence of the housing and alien shafts’ actual rigidity on internal driving system is checked, and the analysis results of gear strength are presented. A new design concept is put forward, which improves design level of gearbox, and reduces the testing time and shortens the product development cycles as well.
Study on Parametric Drawing of Planetary Gear Transmission
Authors: Li Xian Zhi , Zhou Xin , Wang Li Juan , Liu Chun Shan
Published: August 2011

In the planetary gear transmission design, the structure and shape of some major parts are often the same or similar, tedious and duplicate drawing may reduce the drawing efficiency. This paper studies redevelopment technology by using Visual Lisp language in AutoCAD platform, and compiles drawing programs to realize parametric drawing. The new graph can be generated automatically by a computer by modifying simply a few parameters in the drawing process.
Research on Fuzzy Control Rule of Anti-Vehicle Rear-End Collision by Matlab and Simulink
Authors: Gan Nai Tian , Chen Ling Shan
Published: August 2011

Nowadays when automobiles become popular to millions of households, its hidden trouble of road safety seems to be more serious. Traffic accidents happen frequently these years with the increase construction of highway and expressway, and they have done great harm to drivers as well as our society. This paper studies the fuzzy control rule of anti-vehicle rear-end collision on the base of Matlab and Simulink software, and the relative measures have also been explored and put forward.
Teaching and Playback of Motion Trajectory Based on Parallel Manipulator
Authors: Li Wei , Wang Yu Tao , Du Jin Feng , Cao Xiao Yan
Published: August 2011

In this paper, a design method that teaching and playback of motion trajectory based on the double-pole angles rotation parallel mechanical arm is introduced. Take writing as example, each stroke of the word can be fitted by the line and then the beginning and the end of the segment can be used as the teaching points. Using Siemens S7-200PLC’s counter to record the data of the encoder on the teaching point, completing the teaching. When playback, plc reads the data of the teaching points recorded and controls the input pulse of motors, uses the linear interpolation to complete playback of writing. The parallel manipulator’s structure is simple, it can easily be controlled and has rich working space and low cost.
Study on the Permeability of Reinforced Soil with Herb Fiber under Different Salt Solution Concentration
Authors: Yan Geng Sheng , Zhang Hu Yuan , Wang Xiao Dong , Li Min , Zhao Tian Yu
Published: August 2011

The best is to read these instructions and follow the outline of this text. n this investigation, laboratory permeability tests were conducted on the wet-processing reinforcement specimens to study the feasibility of reinforced soil as a material of construction. Two kinds of reinforced specimens with different reinforcement materials (wheat straw (C) and flax (M)) were mixed with 3% contents of soil mass, and product to the cylindroid for measurement of permeability by a flexible-wall permeameter. The variation relationship between permeability coefficient and Na2SO4 concentrations was analyzed. Test results show that the liquidity reduced with incrassate diffusion layer caused by the increasing Na+ concentrations in the diffusion layer of soil particles, and then a decrease of permeability is found. With the increasing time of permeability, it is found that the permeability coefficient decreased due to the consolidation and decreasing porosity of specimens caused by the change of stress state. At the same time, ion exchange adsorption and water film incrassate occurs in soil particle surface which also benefit to the decrease of permeability coefficient.
Flexible Module Optimization of Hydraulic Press Based on LSRM
Authors: Chang Qiu Xiang
Published: August 2011

Many scholars have developed a lot of flexible modules used on Hydraulic press, but to reduce costs such as the producing cost and the transportation cost, the above modules, formed through continuation, should be optimized before put into the module library. This paper introduces a method which optimizes the continuation body of type YH30 by means of LSRM. And the contrast shows the new nodule has a well effect on optimizing structure and reducing costs and materials.
Numerical Study of Effects of Separating Efficiency with the Structural Dimensions
Authors: Wang Wei , Yang Fang Pu , Shi Jing Bao , Luo Ming Fu
Published: August 2011

With the development of the petroleum industry ,the separation technology has made progress. The cyclone separator with different structure sizes (such as taper Angle, import hole, overflow hole and bottom hole) are numerical simulated. The separating efficiency are greatly influenced by structural dimension through studied.
Preferentialness Design of a Composite Impeller with Ultra-Low Unit Speed Centrifugal Pump
Authors: Tian Ya Bin , Qi Xue Yi , Hu Jia Xin
Published: August 2011

According to main factors which affect the design of a composite impeller with ultra-low Unit speed centrifugal pump—the leaf number of the composite impeller’s short blade design, the relative position of the blade’s radial inlet, the bias degree of the blade’s circumferential direction, the deflection angle and so on. The paper applies Orthogonal method and establishes 16 design schemes. The preferentialness design of Composite Impeller’s short blade with ultra-low unit speed centrifugal pump was gained by numerical simulation. Contrast to the method of permutation and combination, this kind of method can decrease the designer’s workload greatly. As the results show, the composite impeller’s inner stress field and velocity field distribute reasonably, H - Q curve method is smoother, curve directs to large discharge and the work performance becomes well by applying orthogonal method.
Research on CAE System Software of the High-Pressure Reciprocating Pump
Authors: Li Ning , Li You Rong , Zhou Si Zhu , Yang Qin
Published: August 2011

To improve the design analysis efficiency of the high-pressure reciprocating pump, the study adopted a kind of visual programming software and programmed the CAE system software of the high-pressure reciprocating pump. The sortware developed three modules in correspondence with three aspects, namely, the analysis of power end’s motion theory, the analysis of the hydraulic end’s suction and discharge process, and the finite element analysis of the structure and the analysis of fatigue life. It is proved that the system software has a friendly interface, easy to operate and highly precise, providing a powerful professional tool for analyzing suction and discharge performance of the high-pressure reciprocating pump.
Application of Micro-Tube Water-Cooling Device for the Improvement of Heat Management in Mixed White Light Emitting Diode Modules
Authors: Sheen Maw Tyan , Jean Ming Der , Lai Yu Tsun
Published: August 2011

This paper introduces a module using the RGB-based LED design to improve the thermal management of a mixied white light LED and describes a system for heat dissipation in illuminated, high-power LED arrays. Mixed light LEDs can be produced by combining appropriate amounts of light from the red, green and blue LEDs in an array. A LED cooling system, using a micro- tube water-cooling device, was fabricated. Recycling water in the system, gave more efficient convection and the heat created by the LEDs was easily removed, in the experiments. It was shown that micro-tube water-cooling systems rendered an improvement in thermal management that effectively decreases the thermal resistance and provides very good thermal dissipation. Furthermore, the results of experiment and simulation demonstrated that a micro-tube water-cooling system is very effective in heat dissipation in LEDs and the fabrication of practical micro-water tube cooling devices for mixing light LEDs was feasible and useful
Research of Simulation and Design of Microperforated Panel Construction
Authors: Yang Li Fang , Chen Wen Li , Meng Fan Yu
Published: August 2011

Full consideration and prediction of noise problem of product will be helpful to improve its quality, shorten production period and reduce cost of product. The microperforated panel is a kind of special absorbing material, through proper control of diameter, perforation rate, cavity length , number of panel and so on, the peak value, frequency band of absorption coefficient can be controlled. According to the absorption coefficient characteristics, the microperforated panel can be used to control some special noise structure. Based on the idea, the engineering software matlab is utilized in the paper to simulate the microperforated panel construction to obtain some useful microperforated panel construction for practical noise control.
An Approach to Identifying Litchi Fruits under Nature Scenes
Authors: Liu Tian Hu
Published: August 2011

In order to detect litchi fruit under nature scenes, an identification method was studied. A simple process was proposed to segment the image and remove noises. Its key steps include image converting; segmenting by Two-Cluster K-means clustering; labeling by white and black; small noises removing by open-close combined morphology; and big noises removing by blob area thresholding. A new contribution has been made to weighing by ultrasonic sensor and machine vision which allows for identifying litchi weight under nature scenes. A max error of 27% was recorded in tests of such weighing method.
The Monitoring System of Waste Heat Recovery Based on S7-300 PLC and WinCC
Authors: Tan Xiao Dong , Zheng Ke De , Liu Chen Bao
Published: August 2011

This paper has given hardware configuration of monitoring system based on the process of the waste heat recovery system. It has described S7-300 PLC software design of the lower computer, and has created monitoring interface of the waste heat recovery system based on configuration software WinCC. In practice, the monitoring system has high reliability, friendly interface, and convenient operation is very suitable for waste heat recovery industry.
Analysis to Dynamic Characteristics Influence on Bearing-Load Sensor to the Rotor System
Authors: Pang Xin Yu , Yang Zhao Jian
Published: August 2011

For a multi-bearing rotor test bed, using the load sensor designed specially measured directly the bearing load value. In order to analyze the dynamic influence of the load sensor on the rotor system, the dynamic equation of the rotor system with the load sensor established to do the qualitative analysis. On the other hand, quantitative analyzing the two structures that the sensor is installed and is not by finite element software ANSYS, and obtained the impact value. The results show that the load sensor reduced the critical speed of the rotor system, but the effect is not, can be appropriately adjusted work speed according to the results of the analysis.
Design and Research of Micro-Displacement Amplifier Driven by Piezoelectric Actuator
Authors: Chen Xi Ping , Xiao Yan Min , Lv Kun
Published: August 2011

Piezoelectric actuator was widely used in precision machinery as driving element used for their small size, high frequency, large resolution displacement and so on. A new micro-displacement amplifier driven by PZT is designed in this paper. The concrete machine parameters are studied out by finite element analysis. And the prototype is trial-manufactured. Experiential results show that the new mechanism has good displacement amplification performance and dynamic characteristics.
Preparation and Characterization of Thermally Compatible Leucite-Reinforced Dental Ceramics
Authors: Wen Jin , Sun Shu Zhen
Published: August 2011

The high average thermal expansion required for thermal compatibility of dental porcelain with their substrate alloy is supplied by the mineral leucite (KAlSi2O6). In the research, the high thermal expansion coefficients phase leucite was prepared by coprecipitation technique. Three materials with formulae of K2O∶Al2O3∶SiO2 = 1∶1∶x ( x=1.4, 2.0, 4.0 ) were investigated for differences in phase, thermal expansion. Unstoichiometric composition where K2O and Al2O3 were added properly is advantage to leucite obtained. Coprecipitation processing produced fine leucite powder that would sinter at 1300°C, this temperature is about 200°C lower than of melting method. The average thermal expansion coefficients of leucite is 22.7×10-6/°Cfrom room temperature to 620°C,which is higher than the common porcelain. Changing in the leucite content of dental porcelain would results from thermal expansion coefficients of porcelain variation, which could be responsible for changes in porcelain-metal thermal compatibility.
Analysis on Actuating Mechanism for Tomato Color Sorting Robot Based on High-Speed Photography
Authors: Zhang Ruo Yu , Kan Za , Yan Xu Guang , Hu Wan Chao
Published: August 2011

To separate objects (immature tomatoes, foreign material) accurately from tomatoes using actuating mechanism of tomato color grading robot, high-speed photography was used to acquire images the tomato sorting process for studying effect between tomato cast position and track for separating. Test results show that tomatoes cast position affects tomato sorting; tomato track from conveyer belt affects the hitting position of pneumatic ejection finger directly. High-speed photography is used for tomatoes sorting process analysis at high speed, which can be helpful for design of tomato color sorting robot.
A Integrated Methodology for Product Life Cycle Design
Authors: Yan Zhi Guo , Yang Jiang , Xuan Ai Guo , Wu Yuan Xin
Published: August 2011

With the increasing public environmental consciousness, chemical product design requires simultaneous satisfaction and compromise of environmental and economic performance. To fulfill the two conflicting while complementary objectives, a systematic approach for life cycle design of chemical product is proposed in this paper. Multi-attribute decision-making is adopted in a trade-off consideration of both technical-economical evaluation and environment impacts assessment with the analytic hierarchy process approach. Based on the evaluation of relative importance of criteria, multi-criteria decision making is performed.
Effect of Size of the Common Cup on the Injection Molding Process
Authors: Liu Qing Qing , Guo Wei
Published: August 2011

Plastic injection molding process is an advanced but much complex plastic part molding with multi-factors coupling interactive effects. The size of the part has a significant effect on the injection molding process. In the current work, a kind of common plastic part, common cup, is taken into study. Based on the 3D FE model, the effect laws of size of the common cup on the fill time, pressure at V/P switchover, clamp force needed and maximum deflection considering all effects in the injection molding process have been investigated. The research results show the following: (1) With increasing the initial diameter of the cup, fill time, pressure at V/P switchover and clamp force increase obviously, while overpacking happens for the maximum deflection considering all effects. (2) With increasing the initial height of the common cup, fill time, pressure at V/P switchover and clamp force increase less obvious. Meanwhile, overpacking doesn’t happen. (3) The effect of height to diameter ratio H0/D0 by changing D0 on injection molding process is different from that by changing H0.
Lightweight Analysis of Torsion Spring Based on Reliability Constraint in Multi-Failure Modes
Authors: Wang Mei , Chen Guo Ding , Xiao Yong
Published: August 2011

The generalized stress and strength distribution interference theory is introduced to establish the reliability model of torsion spring in multi-failure modes. Using it as constraint condition, the lightweight optimization model of torsion spring based on reliability constraint in multi-failure modes is presented. And then an optimization design for a given structure of torsion spring is made to use the theoretical model under operating conditions and the reliability constraint. The weight of the opti-mized torsion spring is lighter than that of non-optimization. This verified the validity of the opti-mization method. The optimization method may contribution to design of aerospace equipments which demand strictly in weight.
Effect of Polar Molecule Urea on TiO2/Urea ER Fluid Properties and Microstructure
Authors: Tan Suo Kui , Song Xiao Ping , Qiao Li , Guo Hong Yan , Ji Song , Zhao Hong
Published: August 2011

By way of mechanical properties test and microstructure observation，the effect of Urea on TiO2 particles has been researched，it has showed that ER fluid activity of the particles were closely associated with urea content. When the mass ratio of Urea/Ti is 30%, The property of TiO2/Urea particles ER fluid is the best .The microstructure observation of the ER fluids under DC electric field showed that the particles aggregated to form thicker and dense column structure when the mass ratio of Urea/Ti is 30%, while the column structure were broken down when excessive urea/Ti (>30%) was been added.
Chalcogenide-Tellurite Composite Microstructed Fiber for Low-Threshold Mid-IR Supercontinuum Generation
Authors: Xie Dong , Wen Jian Guo
Published: August 2011

A chalcogenide-tellurite composite microstructed optical fiber (MOF) has been proposed and designed in this paper. The fiber has a flattened near-zero dispersion curve around 2.5 μm and has two zero dispersion wavelengths(ZDWs) in close. It also shows low confinement loss and single mode operation properties. Numerical simulation has been used to predict the supercontinuum spectra obtained from the designed fiber. Simulation results show that a widely supercontinuum spectrum covering from 1.8 to 6.0 μm can be generated by pumping pulses of energy below 10pJ/pulse.
A Virtual Product Development Platform for Tunnel Drilling Rigs
Authors: Zhang Jian Ming , Liu Gui Qin , Liu Qing Xiu , Zhang You Zhen
Published: August 2011

A virtual platform is developed to support the design of tunnel drilling rigs, which is used to drill holes in underground coalseam for gas drainage. Firstly, a three-layer framework of virtual platform is established, which includes the base layer, platform layer, and application layer to provide data, information and techniques respectively. A virtual design flow of drilling rigs is subsequently defined. Then three key techniques for the virtual design of drilling rigs is proposed, which are digital modelling, digital simulation and digital management. The first is used to support 3-D modelling, the second is used to analyze the dynamic performance, and the third is to manage the design data. Finally, a design case of ZDY6000LDA drilling rig is given to demonstrate the application of this platform.
Preparation of High Performance Aluminum Foam Using Carbon Fibers as Stabilizing Additive
Authors: Cao Zhuo Kun , Liu Huan , Du Jin Jing , Yao Guang Chun
Published: August 2011

Carbon fibers are used as novel stabilizing additives for aluminum foams production at the aim of manufacturing metallic foams of high mechanical performance. The effect of carbon fiber fraction on the foam structure and mechanical property is studied in the present paper. Results shows that the change in foam structure can be slowed down by increasing fiber fraction, which would led to more stable foam. The yield strength of aluminum foams increase with fiber fraction, but the foams are also getting brittle. High performance aluminum foams can also prepared by using aluminum alloy as start material, and the resulting foams show much higher compressive strength than that of commercial aluminum foams.
A Computer-Aided Conceptual Design System: Model and Applications
Authors: Chen Yuan
Published: August 2011

An effort is made to give a description of a computer-aided conceptual design system. A novel Function-Action-Behavior-Mechanism (FABM) modeling framework is proposed to realize mapping from the overall function to principle solution according to customer’s requirements. Expansion and modification rules in the demand behavior are developed to extend the innovation of principle solution. A case study on pan mechanism design for cooking robot is presented to show the procedure of how to implement the intelligent reasoning based on the FABM model.
Multidisciplinary Design Optimization of a Hydraulic Poppet Valve Considering Fluid-Solid Coupling
Authors: Bo Ji Kang
Published: August 2011

Hydraulic poppet valve often works in fluid-solid coupling state. It is necessary to comprehensively consider the multidisciplinary coupling effects in the design and optimization of poppet valves. This paper presents the fluid-solid coupling model for the optimization of a poppet valve, and the actual flow performance of the poppet valve is analyzed by numerical method. By coordinating the conflicting requirements at the system level, the MDO model of the poppet valve is built. The Multiple-island Genetic Algorithm is employed to solve the optimization problem, and an optimum design of the poppet valve is obtained. The optimization results show that the optimum poppet valve has a better performance on the flow characteristics.
Multi-Domain and Hybrid Behavioral Modeling for Complex Product Systems
Authors: Zhu Yu Ming , Liu Ji Hong
Published: August 2011

The model of complex product systems involves mechanical, electrical, hydraulic, control, thermal and even aerodynamic domain. It also simultaneously includes discrete state behavior and continuous dynamic behavior. In order to support the development of complex product systems, in the paper, a behavioral modeling methodology considering multi-domain and hybrid behaviors is presented. The individual behavioral models are firstly developed and then the behavioral model of the system is composed by connecting the individual behavioral models. Some simple syntax and semantics is provided for supporting the construction of the behavioral models. In order to analyze performance of the systems, the behavioral model should be transformed to unified multi-domain model which is formulated in Modelica language. The mapping specifications including model declaration, hybrid behavioral modeling and model interface are presented.
Development of Full Position Portable Coiled Tubing Straightener
Authors: Liu Xiao Liu , Shang Qi
Published: August 2011

To solve the problems of bending, deformation, complicated, hard to center occurred in the assembly welding of coiled tubing; the coiled tubing Straightener is developed by backward applying the theory of three-point bending. Its prominent features are: pressure head pushes directly from the middle; external circular arc explorators on the two sides rotate and support. It realizes the fast and damage-free straightening of coiled tubing. By replacing pressure head, changing the external circular arc radius of explorators on the two sides and adjusting the distance between two symmetrical support points, it can do the precise straightening of available metal coiled tubing of all specifications.