bluuebunny/crossref_metadata_2025 huggingface dataset:
Influences of New Electrical Material on Transient Heat Transfer in IMCCR
Authors: Cao Jun Ci , Li Wei Li , Zhang Xiao Chen , Zhang Yi Huang
Published: July 2011

A new kind of alloy (conductor for electric and magnetic), is proposed in this paper, which applied in induction motor rotor bars, and a kind of induction motor with compound cage rotor(IMCCR) is obtained. By using the electromagnetic-thermal coupling analysis method, the transient temperature field of an IMCCR is numerically analyzed, and the transient thermal process of motor operating with blocked rotor for 10s and then stopped for 10min natural cooling is calculated. The heat diffusion of stator equivalent windings and the double-directions heat transmission processes in stator are analyzed. Based on which, the influences of rotor material permeability and conductivity on motor performance are studied. Comparing with the normal nonmagnetic material, the alloy could improve motor performance significantly while ensure motor thermal performance, which indicates the wide application of such alloy in electrical machines.
Integrated Optimal Design of Ducted Propeller Based on DOE
Authors: Yang Zhuo Yi , Ma Yan , Chen Yan Xue
Published: July 2011

Ducted propeller is a normal thrust used widely in ship field, and the traditional design method could be improved by advanced computer technology of integrated design. Surface panel method predicting hydrodynamic performance of propeller and CFD were both used here, to ensure the results from surface panel method were believable. Surface panel program of ducted propeller was integrated in iSIGHT optimization platform, where the pitches in different radius were optimized and studied to find the best scheme. Design of experiment was selected as optimal method. Design variables were auto-chosen in the design space and optimal process was auto-executed. Besides, the effect of parameters to objective was gained. The final result showed that this method which can improve the efficiency of ducted propeller and realize the motivation provided a new idea for propeller design.
A Study on Surface Quality of GaN with CMP Polishing Process
Authors: Li Wei , Ma Ming Ming , Hu Bin
Published: July 2011

This paper introduced a polishing process for planarization of gallium nitride (GaN) wafer by polishing slurry that is made up by the chemical reaction with H2O2 solution and iron. Some different polishing parameters in the polishing process has been analyzed, which affect the surface quality of wafers, such as slurry particle size, polishing times, polishing slurry etc., and trying to improve the polishing process by optimization of the polishing parameters. The experimental result showed that this polishing method has an effect on the surface quality of GaN wafers, finally, the efficient and precision machining with surface roughness of GaN wafers of Ra0.81 nm has been gained by the CMP polishing process.
Experimental Investigation on the Influence of Tool System Imbalance on its Vibration Characteristics
Authors: Shen Chun Gen , Wang Gui Cheng , Wang Shu Lin , Liu Gang
Published: July 2011

Due to particular structural design, the error of manufacturing and other factors, the tool system will have more or less residual imbalance. The spindle-tool system’s vibration signals and its frequency response structure were made as reference under the testing of machine raising speed idle running, firstly the tool system’s amount of imbalance was adjusted with the aid of the special balancing ring, then the spindle-tool system’s vibration characteristic was obtained under various amount of imbalanced in idle running condition, finally making use of frequency spectrum analysis the influence of unbalanced quantity to spindle-tool system’s vibration characteristics was studied and compared, the results and the researching approach can help to find the rules about the influence of tool system imbalance to its vibration characteristics in higher speed condition.
Removal of Phosphate from Aqueous Solution by Using Red Mud
Authors: Zhu Xin Feng , Liu Hong Ye , Shi Peng Hui , Wu Jun Feng , Guo Yi Fei
Published: July 2011

Red mud has been used to develop effective adsorbents to remove phosphate from aqueous solution. The effects of different dosage, pH of solution and reaction time on adsorption have been examined in batch experiments. It was found that red mud samples show higher removal efficiency for phosphate. The results showed that phosphate removal efficiency was found to be 97 % with optimal reaction conditions initial phosphate concentration 100mg L−1, red mud dosage 10g L−1, pH 2.0, respectively. The phosphate removal efficiency of the red mud adsorbents decreases with increase of pH.
Using of Different Type Cement in Solidification/Stabilization of MSWI Fly Ash
Authors: Wei Guo Xia , Liu Han Qiao , Zhang Shu Guang
Published: July 2011

Solidification tests of MSWI fly ash (FA) with three types of cement including ordinary Portland cements (OPC), calcium sulfoaluminate cement(CSA) and calcium aluminate cement (CAC) were carried out to discuss the effect of cement type on of the FA-cement solid matrix by means of setting time, compressive strength and heavy metals leachability. Results show that the setting time of the FA-cement mixtures using CSA and CAC is shorter than that of OPC. According to compressive strengths demand and the standard of landfill site of municipal solid waste, the dosage of OPC should be limited about 35% by weigh, the dosage of CAC should be limited about 25% by weigh, and the dosage of CSA should be limited more than 40% by weigh.
Influence of Zeolite NaA on Thermogravimetric Behavior of Sodium Alginate for the Purpose of Processing Plastic Wastes
Authors: Huang Zhen , Shi Xiao Han , Jiang Wei Juan , Zhang Jie
Published: July 2011

Thermogravimetric behavior of sodium alginate with incorporation of zeolite 4A has been studied. The experiments were performed at air flow rate of 30 ml/min, under heating rates of 5 ~ 30 K/min and up to 1250 K. Kinetic parameters for the main degradation phase thus were estimated by using the pseudo first-order assumption. The results have shown that the introduced zeolite as well as its content has obviously affected thermal properties of sodium alginate.
Mechanical Method for Recycling Original State Aggregate from Demolished Concrete
Authors: Cai Ji Wei , Cai Qin Yan , Wu Ji Xu , Lü Zheng Hang , Gao Guang Liang
Published: July 2011

The demolished concretes have ever been considered as homogeneous materials and simply crushed to produce recycled aggregates which can only be used for low strength concretes. In mechanical processes of intergrinding in combination with pre-crushing, the sieve residue in each size fraction varies with grinding time and residue-grinding time curves of most fractions have their inflection points that can be considered as termination of separation. The original state aggregates (OSA) so recycled are up to standard of grade II original coarse aggregates specified in China’s standard Pebble and Crushed Stone for Building (GB/T 14685-2001) and can be applied in moderate strength concretes with a bit higher strength than that of original concretes from which the OSA derived. In this method, the OSA can be separated furthest from cement pastes and mortars while suffering minimum damage in separation processes and can retain higher strength.
Sulfonated Chemi-Mechanical Pulp of Cotton Stalk and Bleaching
Authors: Liu Shan Shan , Fang Gui Gan , Deng Yong Jun , Wang Qiang
Published: July 2011

The influence of operational variables in the Sulfonated Chemi-mechanical pulp (SCMP) of cotton stalk was studied, and the hydrogen peroxide bleaching sequence was carried out. The major factors, such as sulfite sodium charge (calculated as Na2SO33%, 6%, 9%or 12%on oven-dry cotton stalk), active alkali charge (calculated as NaOH 2%, 4%, 6%or 8%on oven-dry cotton stalk) and the maximum temperature (110°C, 130°C or 150°C) was investigated. The result shows that: the pulp physical property was influenced significantly by sulfite sodium and active alkali charge, at an increasing tendency with above factors. The optimal chemical treatment cooking conditions could be proposed as follows: sulfite sodium charge 9%, active alkali charge 2%, maximum temperature 130°C and liquor ratio 4:1. What’s more, the single H2O2bleaching sequence was employed, which can provide pulps with brightness 58.0%ISO.
Study on Dynamics of Electrochemical Degradation for Chitosan
Authors: Huang Yong Chun , Zhao Chao Yue , Yang Feng , He Ren
Published: July 2011

The electrochemical degradation of chitosan was studied with using graphite as anode and cathode, NaCl solution as supporting electrolyte. The effects of current density, temperature, NaCl concentration, pH, chitosan concentration on the degradation dynamics were investigated. It was shown that the electrochemical degradation of chitosan obeys the rule of random degradation, and the kinetic equation was established.
Tool Wear Measurement of Ball-End Cutter Based on Shape Mapping
Authors: Zhang Chen
Published: July 2011

In milling process, tool wear has important influence on product machining quality. A measuring method for tool wear of ball-end cutter is proposed in order to predict effectively tool wear. The measuring method maps tool wear shape on a block of metal material by milling hole mode after finishing each milling experiment. These formed holes are measured on CMM (coordinate measure machine) by using the planned measuring method. The measuring process is established to attain tool wear of ball-end cutter. The experiments results show that the proposed measuring method can effectively attain tool wear to provide a foundation for tool wear modeling and monitoring.
Test Method for Rheological Behaviors of Magnetorheological Grease Based on Coaxial Cylinder Shear Mode and Rheometer
Authors: Fu Li Juan , Liao Chang Rong , Ma Jian Zuo
Published: July 2011

A test methodology for rheological behaviors of MR greases based on double rotational coaxial cylinder shear mode is presented in this paper. Both flow velocity profiles and shear stress profiles of MR greases in shear channels are analytically explored. The theory relationship between shear stress acted on MR greases and transmission torques is established, an approximate algorithm is put forwarded to acquire nominal shear stresses by transmission torques. On the basis of differential equation and its rational boundary conditions from stress equilibrium of MR greases micro-unit, an approximate corresponding algorithm is worked out for nominal shear strain rates by rotor angular velocities. The relationship between average value of magnetic flux density in annular channels and excitation electrical currents are experimentally obtained. Based on test methodology above-mentioned, a rheometer is fabricated and modulated, in which torque sensor, angular velocity sensor and ampere meter are respectively used to test transmission torque, angular velocity and electrical current. Rheological parameters of MR grease from the rheometer, whose shear rate is more than 2000 1/s and magnetic flux density acting on MR greases exceed 0.6T, are in good agreement with those from test conduced by commercial theological rheometer.
The Frictional Properties and Mechanism of Nano-Diamond/Ni Composite Coatings by Brush-Plating
Authors: Li Ying , Zou Wen Jun , Li Bian Xiao , Dong Qi Ming
Published: July 2011

The hardness and the wear resistance of the nano-diamond composite coatings were investigated by the micro-hardness tester and the friction tester. The relationship of the nano-diamond concentration, heat treatment temperature and hardness were revealed. These results show that the composite coatings have higher hardness, better wear resistance and lower friction coefficient under the uniform dispersing of the nano-diamond in the nickel matrix. The maximum hardness of the composite coatings reaches HV654 when the nano-diamond concentration is 30%. Frictional coefficient is decreased from 0.185 to 0.16. Moreover, the hardness does not reduce under annealing at 300°C. The frictional mechanism of the composite coatings indicates that the worn nano-diamond could block the direct contact between the composite coating and the standard ring. Spherical nano-diamond particles play the role in the "micro-ball" among the contact surfaces, the frictional coefficient is reduced and the wear resistance is improved.
Fault Diagnosis based on Wavelet Analysis for Bearings under Low Rotating Speed
Authors: Wang Hua Qing , Guo Yong Wei , Gao Jin Ji , Wang Feng
Published: July 2011

Bearing faults signal is very weak under a low rotating speed, and therefore fault diagnosis for bearings under a low rotating speed, is more difficult than under a high rotating speed. The wavelet analysis technique is adopted for fault diagnosis of rolling element bearing under low rotating speed. This work also acquired vibration signals and acoustic emission signals from the rolling bearing under low speed respectively, and analyzed the both kinds of signals for diagnosing the typical bearing faults contrastively.
The Trial Research on Suppressing the Chatter by Variable Speed Milling
Authors: Gou Zhi Jian
Published: July 2011

The vibration occurring in cutting process is a very harmful phenomenon, which destroys the surface finish and dimensional integrity of workpieces and quickens the wear of cutting tool. Cutting chatter can be suppressed or reduced by applying the method of suppressing chatter by variable speed cutting. In order to investigate the effect of variable speed parameters and cutting conditions on suppressing the chatter in face milling, the tests have been conducted.The results have shown that cutting with variable spindle speed cutting in face milling will suppress the development of chatter. If chatter occurs in cutting process, the vibration amplitude of variable speed cutting can reduce by 3-6 times lower than that of constant speed cutting, as long as the variable speed parameter are selected suitably.The values of speed variation amplitudeΔn/noand speed variation frequency fnof spindle speed trajectory parameter have great effect on suppressing chatter,Δn/no= 15- 20% andfn= 0.4 - 0.5Hz are suitable.
The Study of Fuzzy Reliability of Concrete Durability after Corrosion of Steel-Bars
Authors: Shi Yang Hang , Zhang Lu , Yu De Hai
Published: July 2011

Based on the mechanism, influencing factors and their fuzziness of reinforced concrete (RC) cracking caused by corrosion of steel bars, fuzzy reliability of RC durability failure due to corrosion expansion of steel bars is analyzed adopting the mathematic model of fuzzy probability. The method having the advantages of explicit concept, convenient calculation and stable results which is proved by the examples accords with the actual situation and can be applied to the engineering practice.
Stress Conditions for Surface Analysis of Butyl Rubber Lining
Authors: Racek Jan , Kalabisová Eva , Vaclavikova K
Published: July 2011

An investigation has been conducted into the time-dependent chemical degradation of rubber linings produced from Isobutylene-Isoprene Rubber (IIR). These linings are used for the corrosion protection of steel reservoirs and pipelines within various chemical environments. High resolution core level and valence band X-Ray photoelectron spectra XPS of the degraded copolymer IIR have been obtained with the low-current, low-energy electron beam flood gun charge compensation. The components of region C(1s) and O(1s) have been distinguish in the individual peaks during testing. The Full Width of Half Maximum (FWHM) of curve-fitted components has appeared below 1.6 eV. All results of the C(1s) values have taken the stability of the carbon polymer chain, including the vulcanization agent, into consideration. Direct correspondence for carbon-oxygen systems between the O(2s) at ~27.5 to 24.1 eV and O(1s) at ~535.4 to 530.6 eV binding energies has been described. C(1s) loss peak has appeared at ~21 eV from the principal and it’s loss splitting for C-C and C-H bounds has been confirmed.
Study of Sequential Sampling Method for Weibull Distribution
Authors: Xu Xian Zhao , Lou Hong Liang , Li Xing Lin
Published: July 2011

When sequential sampling method based on MTTF is applied to weibull distribution, shape parameter is considered to be fixed. But, shape parameter in criterions or references is different from that in practice. According to sequential sampling method, with the shape parameter changing, changes of acceptance probability and rejection probability are studied. Finally, the result of simulation evaluating shows that the method of sequential sampling method is feasible and reasonable.
Experimental Study on the Durability of Square-Section Columns Externally Wrapped with Carbon Fiber Reinforced Polymer
Authors: Zhang Ling Ling , Ma Jian Xun , Zhang Ling
Published: July 2011

This paper mainly studied the durability of square-section columns wrapped with CFRP by experiments. Three kinds of columns, such as columns without CFRP, columns wrapped with CFRP entirely and columns wrapped with CFRP strips, were considered. The environmental factors included dry and wet cycles of saltwater, the coupled action of freeze and thaw cycles and dry and wet cycles. The results show that the load bearing capability and the ductility of the columns wrapped with CFRP are improved greatly. The external environments have an ignoring effect on the damage model, the ductility and the stiffness of axial compressed columns, but they have an extremely effect on the load bearing capability. The load bearing capability of the columns wrapped with CFRP strips decreased more than that of the columns wrapped with CFRP entirely. And no matter how environments，the bonding between column and CFRP has no damage in this experimental study with the bonding length of 100mm.
Dynamic Reliability Analysis of Drill String System in Deep & Ultra-Deep Well Based on the First Excursion Failure Criterion
Authors: Yang Shang Yu , Yang Xiu Juan , Yan Xiang Zhen , Li Gen Sheng
Published: July 2011

The first excursion failure criterion was introduced to calculate the dynamic reliability of drill string elements. Considering the random of geometry size and mechanical property parameters of drill string in deep & ultra-deep wells, the drill string system was dispersed into several basic elements according to the structure, strength and differences in the nature of formation rock in the well depth direction. And the overall dynamic reliability was quantitatively calculated through the serial theory. Through an example, the results show that the dynamic reliability of the drill string elements appeared fluctuation near the depth of 4500 meters for the inside worn of the drill string and casing, and uneven loading of drill string. The dynamic reliability of drill string in deep and complicated formation was less than any other drill strings. The drilling pressure, rotation speed and drilling depth were the main influencing factors on the dynamic reliability of drill string.
Integration of Moving Least Squares Method and Multilevel B-Spline Method for Scattered Data Approximation
Authors: Yan Shi Ju , Ge Bin
Published: July 2011

For scattered data approximation with multilevel B-spline(MBS) method, accuracy could be enhanced by densifying control lattice. Nevertheless, when control lattice density reaches to some extent, approximation accuracy could not be enhanced further. A strategy based on integration of moving least squares(MLS) and multilevel B-spline(MBS) is presented. Experimental results demonstrate that the presented strategy has higher approximation accuracy.
Automatic Generation of the CAE Parametric Model from the CATIA Model for an Aircraft Hydraulic Tube Structure
Authors: Wu Yong Kang , Qiu Yuan Ying , Li Chun He , Sheng Ying
Published: July 2011

In order to help the designers estimate the dynamic response of the aircraft hydraulic tubes in the working environment, a design and simulation software is developed based on CATIA and ANSYS using VB as the developing tool. This paper concentrates on the part of auto-modeling and introduces the key technologies to automatically extract the CATIA model data and build the CAE parametric model of aircraft hydraulic tube structure in ANSYS. It provides an approach to transfer a CATIA model into a CAE model conveniently which reduces the time for FE (Finite Element) analysis and makes the designers be free from the repetitious data transmission, modeling and so on.
Simulation of Dynamic Carry-Loading Characteristics for Vehicle Body of High-Speed Train
Authors: Qin Fang , Zhang Le Le
Published: July 2011

The carry-loading capacity of the airtight structure is important for high-speed trains. The load of air tightness has been analyzed and universal mathematical model has been built. As a calculation model, the FE Model of the vehicle body for a type of high-speed train has been established and the modal, transient analysis has been done. Different influence of load parameters on the vehicle has been analyzed and compared to obtain the response characteristics of the structure. Finally, the strength of the train under different working conditions is verified, weakness is pointed out and suggestions based on the simulation test are given.
Study on Hydraulic Circuit Simulation Based on MSC·EASY5 for the Arm of Excavator
Authors: Wan Li Rong , Gong Yun Qing , Wang Cheng Long
Published: July 2011

In this paper, a hydraulic excavator is used as an example, and a model of the hydraulic circuit of the excavator arm is established using the graphical modeling method of EASY5. Through the simulation and analysis of the results, it can be seen that the simulation results can accurately simulate the dynamic characteristics of actual hydraulic circuit, and show the variation of the pressure in the hydraulic cylinder chambers. It not only provides a basis for the system performance analysis and the further improvement, but also provides a new method for the optimization design and overall performance analysis of the engineering machinery hydraulic system. And it also provides a new idea of design for the development of new product.
Function Design of PDM System for Small-Medium Scale Pressure Vessel Manufacturing Enterprises
Authors: Wang Gang , Chen Zhi Gang
Published: July 2011

According to the process feature of Pressure Vessel Manufacturing Enterprises,a PDM system for Small-medium Scale Pressure Vessel Manufacturing Enterprises was designed .The system includes many functions such as document management,project management,BOM management,changement management, user’s permissions management.The integration with CAX，ERP，etc．were also considered in the system．The key techniques and conditions in software to realize the functions were explained．The system avoids information isolated between workshops and sections, improves the sharing and Integrality of enterprise’s information．It is useful for management and controlling of Pressure Vessel process and product quality．
Research Status and Countermeasure of Temperature Rise of Hydraulic Dynamic and Static Bearing
Authors: Zhou Jian Fang , Yang Jian Xi
Published: July 2011

Hydraulic dynamic and static bearing has the advantages of hydraulic pressure bearing and liquid hydrostatic bearing, with the peculiarities of higher load capacity, smallest oil film thickness, higher stiffness, and lower power and so on. It was suitable for not only high-speed precision spindle bearing but also low-speed heavy bearing. Because of the loading traits, ball mill will have a greater impact on the role of bearing, leading to the increasing temperature of bearing. The designers take many measures to reduce the temperature, but there are hardly any reports about mechanism of the increasing temperature. According to the study about the present situation and the research strategies of increasing temperature of dynamic and static bearing in the extreme conditions, this article explores the questions of the increasing temperature of dynamic and static bearing in the extreme conditions and the scarcity of this question at present, and proposes the mechanism and the research strategies of the questions of the increasing temperature of dynamic and static bearing of ball mill in the extreme conditions.
Mining Mobile Telecommunication Services Using Apriori Algorithm
Authors: Jiang Ming Hua
Published: July 2011

This paper introduces the mobile phone services and association rules, and a data mining method Apriori Algorithm is introduced and uses it to mine the frequency of mobile phone services,and referrals to salespersons to develop the mobile phone services which woud lead to maximum profit,and help mobile telecommunicaiton company to make decision on seveices planning.
Research on Calculation and Smoothing of Grinding Wheel Profile for Machining Screw Rotor
Authors: Shen Zhi Huang , Lu Ru Sheng , Zhang Zhe Shan , Yao Bin
Published: July 2011

Upon studying the form grinding principle of helical groove and the conjugate movement between the grinding wheel and screw rotor, the equation of their contact line is firstly derived. The problem of smoothing the profile of grinding wheel is then solved by using the point selection smoothing method which is concludes from the theory of complex curves and numerical analysis. Finally, with the help of computer, the simulation processing is done with the final result shows that this design method is reliable. It can not only reduce the time for design and the number of trial samples but also provides a 3D model which can be used in virtual test of screw rotor.
Design and Implementation of an ATmega8L Microcontroller Based Adjustable Closed Loop Speed Controller of a DC Motor
Authors: Seeraji Shakil , Ovy Enaiyat Ghani , Alam Tasnim , Afsar Rayhan
Published: July 2011

The electric drive systems used in industrial applications require higher performance and reliability. The DC motor is used in many industrial applications requiring variable speed and load characteristics due to its ease of controllability. Microcontrollers can provide easy control of DC motor. In this research work, implementation of the ATmega8L microcontroller for speed control of DC motor fed by a DC chopper has been investigated. The chopper is driven by a high frequency PWM signal. Controlling the PWM duty cycle is equivalent to controlling the motor terminal voltage, which in turn adjusts directly the motor speed. A prototype of permanent magnet DC motor speed control system using the microcontroller is developed and tested.
The Optimum Design of Mechanism Scheme Based on the Functional Analysis
Authors: He Jia Bing , Yang Zhen Yu , Jiang Wu Ji
Published: July 2011

This paper analyzes the main theories and methods of the mechanical design, proposes that the design of mechanism scheme should be started from the Functional Analysis of mechanical product to seek functional solution and expand design ideas, proposes a design process model of mechanism scheme based on Functional Analysis (FA) to realize optimal design of mechanism scheme. In this model, description and decomposition of general function, function solving, functional evaluation and optimization were included. Taking scheme design of Li-ion battery bushing device as an example, this paper discussed the optimal method of mechanism scheme based on functional analysis. In order to obtain the most optimal scheme of bushing function, various mechanisms are conceived and proposed, analyzed and evaluated, the optimal mechanism scheme is selected.
Development Design of New Age Children's Toy
Authors: Jiang Xiao Wei
Published: July 2011

Since the toy is the best textbook that accompanies children growing up, this paper analyzes the requirements of development design on children’s toy. In view of the different psychological and behavioral characteristics of children in different age stages, this paper states the specific scheme and functional classification of development design on children’s toy, among them the babyhood should pay attention to develop the toys which can improve intelligence, and the early childhood should value developing the toys which can improve creative ability, artistic ability, language reading ability and physical activities ability, and the childhood should emphasize developing the toys which can improve emotional quotient. Furthermore, some examples are cited to explain. At last, the development trend has been pointed out.
Digital Design of Children's Battery Car
Authors: Du Qiu Lei
Published: July 2011

Digital design of children's battery car is a comprehensive design, which involves many fields such as man-machine engineering, art shaping and so on. This paper discusses the overall design, local design and digital design of children's battery car; and the three stages including preparation and design idea, improvement and virtual manufacturing about digital design of children's battery car have been analyzed.
Analysis of the Relationship between Void Direction and Closure Efficiency in Forging Process
Authors: Li Xia , Wu Xiao Chun , Li Jun Wan , Luo Yi , Zhang Zheng
Published: July 2011

In this paper, both the numerical simulation and the experimental test are carried out to analyze the relationship between the direction and closure efficiency of voids during the forging process. The closing behaviors of through holes which are parallel and perpendicular to the pressure direction respectively are studied in comparison. Furthermore, the stress status and crash degree of internal voids with different axial ratio are examined to analysis the relationship between the closure efficiency and the axis direction. Finally, a method to determine the closure of voids by using stress curves is proposed.
Research on Collaborative Design System of Mobile Crane
Authors: Guo Ke Xi , Zong Hua , Huang Ying
Published: July 2011

The concept of collaborative design and mobile crane designing are discussed, a method of concurrent engineering technique applied in mobile crane designing within network circumstance has been proposed. And a detailed description is carried on a sort of key technology—the line browsing and revision, which is based on a re-development of the SolidWorks drawing software on the .NET platform, the parametric design module of mobile crane is complete. Besides, with support of digitized coordination design tool, the Mobile Crane coordination design platform is constructed.
Study on the Information Coding Design Humanity of Man-Machine Display Interface
Authors: Zhou Ying Wei , Zhuang Da Min , Song Guo Ling , Wanyan Xiao Ru
Published: July 2011

The humanity of coding design for human-machine display interface in the product design is studied by experimental method. During the experiment, three character types, three eye distances from the display interface, five character sizes are adopted. The correct rate and reaction time are chosen as the evaluation indexes. Analyzed by ANOVA, mathematical models of the information coding are established. Mathematical models proposed in this paper can be widely applied for man-machine display interface coding design, and provide theoretical basis for different kinds of products design.
Harmonic Detection Based on Improved Adaptive Method and its Performance
Authors: Zhang Jun Min
Published: July 2011

In this paper, according to the base-adaptive detecting method of harmonic current for APF, there had contradiction between detecting accuracy and dynamic response. It had been proved that this system is a symmetrical notch-filter. Based on analysis above, this paper is proposed improved-adaptive detecting method. A low-pass filter has been in base-adaptive system. We first discussed the stability of improved system. Then theoretical analysis and simulation test shows the bandwidth had been reduced nearby reference frequency. Simulation had showed that the dynamic performance was in a period and the harmonic distortion rate was no more than 1.7%.
Design of a Fuzzy Control System for Integrative Irrigation in Field
Authors: Zhang Ying Mei , Yao Li Li
Published: July 2011

A set of integrative irrigation fuzzy control system is designed to the question of the north field crops irrigation in this paper. In this system, the biogas digester, generating system, irrigation system, and control system are combined organically; the power needed is supplied by the biogas generator; the signals of soil moisture and air temperature are collected by the PLC; according to the control scheme that mainly controls soil moisture while air temperature is considered secondarily, a three-dimension fuzzy controller is designed to irrigate precisely; the local and remote communications are realized via the Ethernet and GPRS respectively; four monitoring modes (local operator monitor, SMS, website and C/S client) are designed in this system. The automatic irrigation system can save water, power and fertilizer at the same time.
Design of Multi-Channel Data Acquisition System Based-On DSP
Authors: Leng Jia Peng , Liu Wen Yi , Liu Su Hua , Shen San Min
Published: July 2011

Data Acquisition System Based-on TMS320F2812 can quickly and easily for analog-digital converting, arbitrarily switching to 16 analog input channels. Serial Communication interfaces Make the system easy to use .The system is in design modular, can flexible debugging and modify.
Predictive Controller Design and Simulation of Time-Varying System Based on IGPC
Authors: Gao Qin He , Guan Wen Liang
Published: July 2011

An adaptive predictive controller is proposed to solve the time-varying characteristics of the industrial process control system. The arithmetic of implicit expression generalized predictive control（IGPC） is put forward to compute the optimal control signal increment. In order to decrease the computing work and increase the computing speed, the system input/output data are used to identify the controller parameters directly and the plant model parameters are unnecessary. Simulation results show that the controller can track the change of setting value excellently even though without any prior information of controlled system, and have excellent adaptive abilities for the changes of system external disturbing signals and model parameters.
Design of Open Motion Control System in Fully Electrical Plastic Injection Molding Machine
Authors: Zhang Hang Wei
Published: July 2011

This paper intends to configure a control system of the plastic injection molding machine using a Motion Controller. It narrates the wiring methods of the control system based on “PC + Motion Controller” architecture. Furthermore, it divides some functions by the language of C++ Builder. This work aims to produce a low cost and high efficient control system which has good expansibility and transplantation.
Research on a New Flexible Acceleration and Deceleration Algorithm with Continuous Jerk
Authors: Sun Jian Ren , Hu Chi Bing
Published: July 2011

Control of the motion process of acceleration/deceleration (Acc/Dec) is one of key complicated problems in CNC system development. The excellent Acc/Dec control can improve the processing precision. The traditional Acc/Dec algorithms such as the linear and the exponential are not suitable for high speed motion because there would be flexible impacts existing in feed motion, especially that the jerk of the S-shape curve Acc/Dec is discontinuous. A new flexible Acc/Dec algorithm for high speed motion system based on the squared sine function is introduced. The modeling of the Acc/Dec algorithm with Trigonometric Function Squared Sine(TFSS) shape curve is constructed.In this algorithm, the sine curve in jerk, acceleration, velocity and displacement are all continuous. The simulation experiments result demonstrate that the Acc/Dec algorithm with TFSS shape curve is a new method of continuous Jerk for the design flexible Acc/Dec.
Ratio Control Strategy for an Electromechanical Continuously Variable Transmission Based on Engine Models
Authors: Jiang Qiang , Liu Hong Yi , Hao Jian Jun , Cheng Yue
Published: July 2011

Electromechanical control CVT (EM-CVT) is a new type of continuously variable transmission, and its ratio quality is an important parameter validated the performance of vehicle. In order to study the dynamical coupling technology between EM-CVT and engine under the running state of vehicle, the special character of two working models is obtained by engine experiment; according to the principle of the EM-CVT, the relation between vehicle speed and ration is theoretically analyzed. Based on the basic theory of PID control, the improved PID control algorithm is proposed for the speed ratio control of the EM-CVT, and experimental verification is made. The experimental results show that there is a significant effect on the system with this algorithm.
Evaluation of 18 Year-Service Lifetime of NR-SBR Lining
Authors: Racek Jan , Kalabisová Eva
Published: July 2011

Our recent high resolution core level and valence level X-ray photoelectron spectra (XPS) of Natural-Styrene Butylene Rubber (NR/SBR) demonstrated much narrower linewidths than previously obtained on rubbers or other polymer coatings. This improvement is due to low-current, low-energy beam flood gun charge compensation on non-conductor rubbers. The different charging has compensated on the rough surface and in the bulk of sponge structure in depth 50 Å of rubber sample. Despite residual charging has occurred on the surface which is apparent in C1s and O1s shoulder on its right side of the peak shape. Carbon groups such as C-H, C-C, C=C cannot be easily differentiated by their principal C(1s) peak chemical shift. Carbon black fillers seem to behave quite differently in the rubber-curing reaction. The stability of vulcanized rubber with sulfur curing system was studied in components of C(1s), O(1s), S(2p) regions which represented appropriate estimation of changes of crosslinked with sulfide bonds on rubber surface. The connection between the Shore hardness of rubber and the presence of carbonyl and sulphonyl groups was apparent. A model has been proposed for the degradation of the crosslinking density of rubber after long term exposure.
PID Parameters Adjustment Based on PMAC Control Card
Authors: Zhu Ming Xin , Yang Zhong Yi
Published: July 2011

This paper analyze the importance of using PID servo-control parameters based on PMAC motion control card. The control accuracy can be improved greatly in PMAC servo control system. And the following error can be reduced substantially, control algorithm of PID based on PMAC is given and tested by experiment of PID control performance.
Research on Large Steam Butterfly Valve for Steam Turbine DFMEA Tool System Based on Knowledge Management
Authors: Wu Zhen Yong , Ming Xin Guo , Song Wen Yan , Zhu Bao Ting , Ni Jia Min
Published: July 2011

Failure Modes and Effects Analysis (FMEA) method has been used to study the reliability of many different power generation systems, making it easier to take actions to overcome such issues, thus enhancing the reliability through design. A FMEA Knowledge Base System was designed and realized in this paper, and this system was used to design new steam butterfly valve for steam turbine. Through the system designer will improve product quality, and reduce risk.
High Efficiency Strategy in Mould Cavity Roughing Oriented Machining Features
Authors: Cai Yu Jun , Qi Tie Li , Chen Shu Lai
Published: July 2011

A highly efficient rough machining strategy for mould cavity oriented machining features is proposed based on the traditional CAM systems. The rough machining strategies for the mould cavity can be calssified as drilling, reaming, slot cutting, lateral cutting and clearance machining according to the extated cutting layers which is generated by the traditional constant scallop toolpath. And the machining methods are differ accodring to corresponding machining features. The strategy proposed in this paper has an great value for the high efficiency mould cavity machining, it can not only ensure the load well-distributed in the machining process, but also raise the machining efficiency and extend the tool life.
Comparison of Forecasting Methods for Thermal Error on High-Speed Motorized Spindle
Authors: Lei Chun Li , Rui Zhi Yuan , Liu Jun , Fang Jing Fang
Published: July 2011

In order to reduce the thermal error of the motorized spindle and improve the manufacturing accuracy of NC machine tool, the thermal error forecasting models based on multivariate autoregressive (MVAR) method and genetic radial basis function (GARBF) neural network method are proposed, respectively. According to different representations of generation mechanism of motorized spindle thermal deformation, operation efficiency and curve fit precision of these two models are compared. The studied results show that under the same temperature rise variable conditions, MVAR model and GARBF neural network model have almost the same convergence and operation time and relative errors of two models are less than 3%. The results also show that the MVAR model has higher forecast precision in the prediction former stages; in contrast, the GARBF neural network model has higher forecast precision in the latter stages.
Research on Output Power of Plasma for PCVD Synthesizing Silica Glass
Authors: Wang Yu Fen , Song Xue Fu , Sun Yuan Cheng
Published: July 2011

Super purity silica glass was synthesized by Plasma Chemical Vapor Deposition (PCVD) method, during which inductively coupled plasma was used as the heat source. Influence of structure factor of tube and working gas on output power were discussed. The structure factor of tube was confirmed by analyzing the relation between structure factor of tube and coupling efficiency. With the increase of coupling efficiency, output power and plasma radius grow bigger. Super purity silica glass can be successfully synthesized when air was used working gas, during which input power was 100kW and output power reached to 40kW.
A New Approach to Precision Cropping with Radial Forging
Authors: Zhao Sheng Dun , Zhong Bin , Tang Yong , Zhao Ren Feng
Published: July 2011

This paper presents a new approach to precision cropping with radial forging, it skillfully utilizes the stress and strain concentration effect of the prefabricated V-shaped notch and the principle of the radial-forging machine to achieve the regular fracture of metal bar. The basic working principle of the new radial-forging cropping method is discussed in detail. Moreover, the distribution of the radial displacement loads is discussed in detail, and the loading rules are clearly explained under the conditions of the single cropping die, two cropping dies, three cropping dies and four cropping dies, as well as the radial-forging loading sequence. The model and equation of the movement with the radial-forging are established, the feasibility analysis of the radial-forging cropping method is carried out, which is in agreement with the experimental results.
Manufacture Probe with EDM Single Pulse Discharge Research
Authors: Chen Lan
Published: July 2011

This paper presents a new method to fabricate tungsten microelectrode in a single pulse electrical discharge. The electrode material, diameter and polarity affect the shape of probe. The 80μm diameter tungsten wire between 500 and 600μF capacitance can be fabricated in 1μm tungsten electrode probe tip. The experiment use different material such as W, Cu and Mo. Finally, in the condition of “negative pole machining”, only tungsten can be used to make probe. It can greatly shorten the microelectrode fabrication time and effectively improve the reliability of the microelectrode and can fabricate a nanometer level tip in general electrical discharge machining (EDM) machine tool not add any other apparatus. The fabricated microelectrode can be used as a probe for scanner and measurement devices.
Anti-Overload of a High-G Acceleration Sensor
Authors: Shi Yun Bo , Zhang He , Tang Jun , Zhao Rui , Liu Jun
Published: July 2011

High-g acceleration sensors are used in high-impact environment, the ability of resisting high-overload is demand higher requirements.In order to determine the Shock-resistibility of the sensors, tests were performed using Hopkinson bar. Analysis of the failure mechanism of the sensor.The results show that the critical load resulting in sensor failure is about 200000g. Main failure mode of the sensor chip is broken.
Clothing Workshop Production Line Analysis and Improvement Research Based on IE
Authors: Zhao Ling , Yang Jing
Published: July 2011

In the face of problems of labor shortage, high cost and low efficiency, if the company can implement industrial projects scientifically, enterprises could effectively increase the garment processing efficiency and enhance their marketability. This article firstly takes a clothing firm for example, analyzes and identifies problems on the production line, by using methods of program analyzing and stopwatch measuring; Secondly, this article will analyze enterprises’ methods of working and balancing to improve its balance; Finally, the results show that the application of the researching method has dramatically increased the balance of the assembly line and enterprises’ production rate.
Modeling and Exergy Analysis of Seawater Source Heat Pump System
Authors: Shi Zhi Gang , Li Xu Quan , Hu Song Tao
Published: July 2011

A seawater source heat pump (SWHP) system refers to the utilization of solar energy stored in sea water as heat source and heat sink , offer an attractive option for heating and cooling residential and commercial buildings owing to their higher energy efficiency compared with conventional systems The purpose of this study is to present an exergy analysis of a SWHP system The exergy transports between the components and the consumptions in each of the components of the SWHP system were determined for the average measured parameters obtained from the experimental results. In addition the exergy loss was presented for the SWHP system studied to give quantitative information regarding the proportion of the exergy input that is dissipated in the various system components.
Structural Topography Optimization of Engine Block to Minimize Vibration Based on Sensitivity Analysis
Authors: Du Xian Feng , Li Zhi Jun , Bi Feng Rong , Zhang Jun Hong , Wang Xia , Shao Kang
Published: July 2011

This paper describes the structural optimization technique with FEM topography optimization technology, the design shape of engine components have been optimized based on the sensitivity analysis, and the purpose is to minimize the vibration of engine block. The process of structural optimization display that the vibration on FEM models of engine block as boundary conditions for subsequent topography optimization were used to be an output from dynamic response analysis, and the loads exerted on the FEM models are acquired from the multibody dynamics system, and topography optimization is performed to detect the effective design parameters of engine block shape to structural strength, to reduce the vibration velocity intensity. This paper presents today’s computer design capabilities in the simulation of the dynamic and vibration behaviour of engine and focuses on the relative merits of modification and full-scale structural optimization of engine, together with the creation of new low-vibration designs. The results verify the analysis, assessment and vibration optimization of the engine.
Design and Implementation of Performance Appraisal System for Foundry Enterprises
Authors: Chen Lu , Zhou Jian Xin , Wang Hong , Ji Xiao Yuan
Published: July 2011

Performance appraisal, an effective method for human resource management, is getting increasing attention by more and more foundry enterprises. Traditional manual methods, though laborious and not conductive to the management, have been widely used to appraise employee’s performance in the past years. Most domestic foundry enterprises have achieved a certain extent of informationization, during which lots of valuable data are accumulated, but these data rarely play a significant role in performance appraisal. In order to solve these problems, this paper analyzes the features of performance appraisal methods of these foundry enterprises, then designs and implements a Performance Appraisal System (PAS) based on data integration. PAS is suitable for enterprises at different informationization levels. The aim of PAS is to achieve a more rapid, fair and accurate performance appraisal and help to promote informationization of foundry enterprises.