bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Nano-SiO2 Used to Improve the Property of Ink
Authors: Huang Wen Tao , Chen Guang Xue , Tang Bao Ling , Yu Ming Guang
Published: November 2011

The ink used in food packaging is facing great challenge with the increasing of food safety requirements. In this paper, a kind of nano-SiO2 water-based ink was studied which combined the anti-UV & anti-bacterial characteristics of nano-SiO2 with the advantage of non-polluting water-based ink. Nano-SiO2 was prepared by the chemical precipitation method and characterized by XRD and Malvern zetasizer Nano-ZS. Sodium silicate solution and NH4CI solution were used as the reagent. The experimental results showed that the average size of nano-SiO2 was less than 100nm, and it was a kind of amorphous powder. The homemade powder of nano-SiO2¬, water-based ink and dispersant PVP were mixed using Ultra–wave dispersion, and the anti-UV & anti-bacterial water-based ink could be prepared. The UV absorption experiment of this ink shows that the absorption rate was nearly 100%, and the anti-Escherichia.coli(anti-E.coli) experiment showed that the anti-bacterium rate could reach 90%. This study has good application prospect in anti-aging property of ink and the area of food safety packaging.
The Application of Environmental Protection Long-Lag Material in Printing Ink of Fluorescent Map
Authors: Yang Kun , Shi Rui Zhi , Wang Ming Xiao , Zhou Xiao
Published: November 2011

With the development of fluorescent technology, the application area of fluorescent material is expanding, which includes the fields of traffic, national defence, architecture, detection, decoration etc. In the field of printing, whether in the value of utility or view and admire, fluorescent adds tremendous energies. However, a majority of fluorescent materials used nowadays contain radioelement, which will do harm to human health. This paper considers the needs of fluorescent map printing, according to the defects of traditional fluorescent material such as low brightness, short duration time, strong radioactivity, limitation to spot color printing etc. It improves the capability of long fluorescent lag material and makes red, blue, green and yellow long fluorescent lag materials. Meanwhile, it tests the influence of ink thickness, illumination time and granule size etc. on irradiance capability. The thicker the ink is, the longer of the lag time will be. The bigger the granule size is, the lag time will be. It also tests its radioactivity extent, which is in the safety range and reaches the standard of environmental protection. According to the special requirement of map printing, this paper brings forward the technique scheme of the application of long fluorescent lag ink in map printing,which realizes the color fluorescent map printing.
Study on the Surface Delamination in Milling Carbon Fiber Reinforced Plastic with PCD Tool
Authors: Wang Yong Guo , Sun Chang Yu , Yan Xiang Ping , Jiang Ke Ren
Published: November 2011

The factors which lead to the surface delamination existing in milling carbon fiber reinforced plastic (CFRP) with PCD tool have been studied. The surface delamination is summarized by analyzing the experiment results based on studying cutting velocity and cutting feed. Experimental results show that the increasing cutting feed leads to the increment of cutting force which in turn causes the increasing delamination of CFRP materials. Moreover, the delamination initial reduces with the increasing cutting speed from 6000 to 10000r/min but subsequently raises when the cutting speed vary from 10000 to 15000r/min with the same cutting feed of 0.08mm/z.
Accuracy Enhancement of Alignment for Five-Axis CNC Machine Tools through Touch Trigger Probes
Authors: Bao Sheng , Zhang Fu , Zhang Xi
Published: November 2011

The random errors exist in measuring with touch trigger probe. These errors are directly introduced into workpiece coordinate system with conventional alignment method. An enhanced measuring method is proposed in this paper to improve the accuracy of alignment for five-axis CNC machine tools. By using the method of least square, an error reference frame is constructed, and the relationship between the alignment parameters and the error reference frame is derived. An example of aircraft structural parts is presented to validate the presented method.
Application of Biodegradable Cutting Fluids in High Speed Turning
Authors: Pei Hong Jie , Zheng Wen Jie , Wang Gui Cheng , Wang Hu Qiang
Published: November 2011

Large quantities of coolant-lubricants are still widely used in metal working industry, generating high consumption and discard costs and impacting the environment. An alternative to current practices is to use biodegradable cutting fluids that doesn’t pollute environment or require new setups. In current study, biodegradable base oils, synthetic ester and castor oil, are chosen and compounded into cutting fluids which correspond with the national standards. The tests have been performed to high speed turn AISI 1045 steel in ester-based fluid, castor-based emulsion, kerosene and dry condition. The results indicate that the application of cutting fluids is inevitable in metal machining and can not be replaced by dry machining. The lubricating and cooling properties of the ester-based fluid and castor-based emulsion are better than kerosene and can wholly replace mineral oil.
Application Study of the Aviation Structures’ Machining Deformation On-Line Measurement Technology
Authors: Sui Shao Chun , Tang Li Min , Chu Wang Wei
Published: November 2011

Based on non-contact 3-D on-line measurement technology, the article studies the aviation structures’ machining deformation on-line measurement technology. The technology provide a effective way to measure the machining deformation, and the accuracy of the system can reach 0.05mm in 2000mm. Use the on-line measurement technology to get the 3-D shape of the structures after machining, and then compare the measurement result with the theoretical model to get the machining deformation. The deformation results provide the basis for the improvement of machining process.
Automatic Control Technology of Grinding Zone Temperature in Grinding Hardening
Authors: Cheng W. , Wang Gui Cheng , Liang P.
Published: November 2011

In grinding hardening process, part’s surface (grinding zone) temperature directly affects the quality of surface layer of heat treatment. The high temperature heat pipe is very good device of control heat transfer. In order to make the grinding zone temperature slightly change in grinding process, this paper describes a design of temperature automatic control technology. A high temperature heat pipe contact with the part’s grinding zone. The zone temperature is measured using infrared radiation pyrometer and the temperature data will be used to control the high temperature heat pipe’s thermal resistance through the PID controller. That is that the PID controller will adjust the contact area between part and high temperature heat pipe, thus achieves control of part’s surface hardening requirements.
MQL Application in Vibration Tapping
Authors: Song Wei , Wang Gui Cheng , Yang Lei , Pei Hong Jie , Wang Hu Qiang
Published: November 2011

To solve the problems caused by the cost of metal working fluids in manufacturing processes, many methods have been employed. MQL (minimum quantity lubrication) is a successful application as a green manufacture strategy. Vibration tapping is a workable tapping method with good performance. An application of MQL technique in vibration tapping was studied. Maximum torque and chip morphology were used to evaluate the performance of MQL operation. A comparison among MQL, flooded and dry operations was carried out. The results showed that MQL decreased the maximum torque value obviously and the chip morphology under this condition was good.
Precision Machining for Thin Wall Spherical Shell Based on Magneto-Rheological Fluids Strengthening
Authors: Kong Jin Xing , Zheng Yong Cheng , Wei Qi Long
Published: November 2011

Magnetorheological (MR) fluids can transform from fluid to solid and back to fluid rapidly in magnetic field. It is a novel intelligent phase transition material. In this study, MR fluids are filled inside a thin wall spherical shell as phase transition material to improve the workpiece stiffness. A fixture structure based on MR fluids for the thin wall spherical shell precision machining is designed. The fixture stiffness can be controlled and the MR fluids can be used many times. The MR fluid as strengthening material is developed and the amount of metal powder in MR fluids is 52% by volume and the performance of MR fluids is measured. Based on electromagnetic principle, a special magnetic field is designed and the magnetic field distributing is analyzed and optimized. The thin wall spherical shell using the designed fixture is turned in CK7820B lathe. The cutting experiment result shows that the fixture based on MR fluids can improve the workpiece machining precision.
The Performance Research of Automobile Disc Brake Based on Finite Element Technology
Authors: He Ya Feng
Published: November 2011

Due to good cooling and braking performance, it is widely used for disc brake in automotive industry. The numerical analysis of stress and strain field for automobile disc brake is done by using ANSYS finite element platform in this paper, the relationship of design parameters and braking performance is obtained by changing design parameters of the brake (braking force, friction coefficient, brake pad thickness).At the same time the modal of automobile disc brake is analyzed, which the results provide a theoretical basis and reference for the automotive brake designer.
Design and Simulation of a-Si:H/nc-Si:H Tandem Solar Cells
Authors: Shan Feng , Wei Wen Sheng
Published: November 2011

A kind of amorphous/nanocrytalline Si (a-Si:H/nc-Si:H) PIN type tandem solar cell of TCO/a-SiC:H(p1)/buffer/a-Si:H(i1)/nc-Si:H(n1)/tunnel junction (TJ)/nc-Si:H(p2)/ nc-Si:H(i2)/ a-Si:H(n2)/Al was optimized with numerical method. The high conductivity, high optical transmittance and wider band-gap material was selected as window layer in the cell. The buffer layer between p1 and i1 layers and the tunnel junction were designed, respectively. The thickness and band-gap of intrinsic layers in sub-cells were adjusted separately. The simulation results indicate that absorption solar spectrum by the designed cell can be expanded towards the long wave direction. The light-induced recession of present cell was restrained while the stability was improved.
Intelligent Control in Gas Supply System for Power Generation with Low Concentration Gas
Authors: Li Zhen Bi , Jiang Yuan Yuan , Zhang Zi Qiang
Published: November 2011

Along with the tension of global energy and the improvement of environmental awareness, more and more Research institute begin examining how to change low-concentration gas into treasure. So we design the intelligent controller with ARM920T as its main control chip, set up an intelligent controller with two inputs, which will dilute the concentration from 4%-8% to 3.8% and the transmission can be carried out under constant pressure. We have made simulation toward the system by using Simulink in MATLAB and Fuzzy toolbox. The results show that the control effect turns out to be fine and has reached the performance indicators of power supply control system of low-concentration gas. This program will be proved to be an ideal intelligent control plan.
Research on Mono-Base Multi-Electrode Quartz Crystal Resonator Dimension Structure and Simulation Analysis by ANSYS
Authors: Zhou Hong Yun , Tian Wen Jie , Sun You Bin , Li Guang
Published: November 2011

By energy trap theory and normalized criterion, this paper theoretical analyzed the mono-base multi-electrode quartz crystal resonator dimension structure，and used ANSYS finite element analysis to simulate the stress distribution in the crystal when quartz crystal resonator exerted with different position of radial arc force. Theory and simulation get the optimal electrode structure and the best azimuth angle to add force, provide reference to design new mono-base multi-electrode quartz crystal resonator.
Poor Information Analysis of Rolling Bearing Friction Torque Characteristic Parameter Based on Phase Space
Authors: Gao Lei Lei , Xia Xin Tao
Published: November 2011

The friction torque of rolling bearings belongs to an information poor system with unknown probability distributions and trends. This counteracts dynamical assessment for the characteristics of the rolling bearing friction torque as a time series. For this reason, the chaos theory is employed to recover the original dynamic characteristics of a friction torque time series by means of the phase space reconstruction theory. The dynamical Bayesian probability density function of the characteristic parameters of the friction torque is constructed by the information poor theory based on the phase space. The method for point estimation, interval estimation, and trend estimation of the characteristic parameters is proposed in this paper. The investigation shows that the error between the calculated result and the experimental result is very small.
Research on On-Line High-Voltage Switch Contact Temperature Rise Monitoring System Based on WSN
Authors: Zhang Jin Bo , Gao Yang , Hao Pei
Published: November 2011

In order to detect the overheating fault of high-voltage switch contacts in time, and enhance the reliability of power supply system, this paper presents a new method for temperature rise monitoring, it is realized by WSN (wireless sensor network) and electromagnetic coupling which is a power-gaining technology. Based on the above method and technology, the author designs an on-line system to monitor the temperature rise of high-voltage switch contacts and builds a WSN based on ZigBee protocol. The system includes integral temperature collectors and data receiver, and the data between two of them is transmitted wirelessly by using the opening frequency band of 2.4 G provided by wireless module. The integral temperature collector does not need external power for its power is provided directly from high-voltage bus by the principle of electromagnetic coupling. The extensive system tests show the measurement error of temperature is ± 1.5°C, which can meet the temperature measurement requirements of high-voltage switch contacts.
Enhanced Field Emission Studies of Carbon Nanotube Emitters with Cross-Like Cathode Electrode for the FED Panel
Authors: Ma Yan Xia
Published: November 2011

With screen-printing method, the diode field emission display panel was fabricated. On the cathode back plane, the cross-like cathode electrode structure was developed for improving the field emission properties of field emission display panel. The prepared carbon nanotubes were utilized to form the electron emission sources, and the necessary cathode potential for the carbon nanotube cathode could be conducted by the indium tin oxide stripe. Seen from the fabrication pattern, the divided indium tin oxide stripe was cross-like, but the fabrication surface for the single carbon nanotube cathode pixel was circular. The whole field emission display panel possessed good field emission characteristics.
The Control System Research of Reheated Steam Temperature State Variables Based on the Mechanism Analysis of Dynamic Characteristic
Authors: Gu Jun Jie , Wang Dong Xu , Ren Yan Ling
Published: November 2011

In this paper, it is presented a method of the design and parameter calculation for state variable feedback control system of reheat steam temperature, which based on the mechanism analysis of reheater dynamic characteristics of supercritical 600WM unit. The simulation results show that the control quality and anti-interference ability is better, and the response is faster, while the control system of reheater steam temperature is established with this method.
Rheology, Phase Morphology and Crystallization Properties of PA6/PP-g-MAH/POE Blends
Authors: Run Ming Tao , Han Qing , Xing Bing Tao , Yao Meng
Published: November 2011

The phase morphology, rheology, and crystallization properties of the PA6/PP-g-MAH/POE blends prepared by melt-blending method were studied by scanning electron microscopy (SEM), capillary rheometer and differential scanning calorimetry (DSC), respectively. The results suggest that the compatibility of PA6 and POE can be improved by the compatibilizer of PP-g-MAH and the 10% of PP-g-MAH is preferred. PP-g-MAH and PA6 can both serve as nucleating agents for each other, and improve their crystallization behaviors. All melts of PA6/PP-g-MAH/POE blends are pseudo-plastic fluids, and PP-g-MAH components can increase the melt apparent viscosity due to its inherent higher viscosity, and so the processing property of the blend will be controlled in much wider temperature range.
Support Vector Machine and its Predicting Stability of Partially Stabilized Zirconia by Microwave Heating Preparation
Authors: Yang Biao , Li Wei , Liu Li Jun , Peng Jin Hui , Zhang Li Bo , Zhang Shi Min , Guo Sheng Hui
Published: November 2011

Support vector machines (SVMs) are a promising type of learning machine based on structural risk minimization and statistical learning theory, which can be divided into two categories: support vector classification (SVC) machines and support vector regression machines (SVR). The basic elements and algorithms of SVR machines are discussed. As modeling and prediction methods are introduced into the experiment of microwave preparing partially stabilized zirconia (PSZ) and built the stability prediction model, the better prediction accuracy and the better fitting results are verified and analyzed. This is conducted to elucidate the good generalization performance of SVMs, specially good for dealing with nonlinear data.
An Investigation into the Static Mechanical Behaviors of Special-Shaped Arch Bridge
Authors: Kou Chang Huan , Huang Yan Ze , Yang Guang , Ma Shih Wei , Wu Tsung Ta
Published: November 2011

Considering Taiwan’s mountainous terrain and winding roads, the special-shaped arch bridge may exhibit superior adaptability; therefore, it has a wide range of applications in the domestic construction of bridges. This paper describes the basic theory and analytical process of the special-shaped arch bridge, using case studies to illustrate the static response of the bridge under uniform dead load. Furthermore, this paper discusses the effects of the changes of the bridge’s geometric shape from the static load response. The results show that because the arrangement of the special-shaped arch bridge is distinct from that of the traditional arch bridge, the distributions of the initial and completion cable forces are complex such that obtaining regular stress responses is difficult regardless of whether the bridge is in-plane or out-of-plane. Hence, the arrangement of cable forces should be specifically considered when building an analytic model of a special-shaped arch bridge.
New Measurement Method of Concrete Pavement Surface Macro-Texture
Authors: Cui Meng , Kang Hong Wei , Zhang Zheng Wei
Published: November 2011

Surface macro-texture in rigid pavements plays an important role in providing safety (providing skid reswastant surfaces) for the traveling public. In general, macro-texture of cement concrete pavements had been measured through sand patch method in China. With the development of measurement technique, some quick methods were applied, such as laser cross-section instrument. But it was unsuitable for the grooving concrete pavement because of its restrictions on measurement principle. So measurement of concrete pavement surface macro-texture based on 3-D optical dense point clouds was introduced in this paper. First, 3-D coordinates of the pavement surface were obtained by the 3-D optical measurement system, then 3-D texture model would be rebuilt with self-programming softwwere, at last the Mean Texture Depth (MTD) of surface could be calculated and compwered with sand patch method. The article studies brooming, grooving and exposed-aggregate cement concrete pavements, and make a correlation analyswas between MTD values of these two methods. The results indicated that they had good correlation, and the measurement technique based on 3-D optical dense point clouds could be used to evaluate cement concrete pavement surface macro-texture quickly
Thermal Conductivity Test and Coupling Simulation of Heat-Transfer in Fracture Rock
Authors: Zhang Shu Guang , Yu Yong Gang
Published: November 2011

In order to research thermal conductivity of fracture rock, fluid-heat coupling test and simulation are studied. Empirical equation of thermal conductivity is obtained and conductivity factor is ensured by test data. Based on the fluid-heat coupling model of heat-transfer, temperature field distribution of fracture rock is described. At the same time, the heat-transfer equation is discretized by using weighted residual Galerkin finite element. Combined with boundary condition and parameters, the temperature field in fractured rock mass is simulated by finite element method. The temperature of fractured rock mass under the action of the seepage is combined with the initial rock temperature, fluid temperature and the rate of the flow. Thermo-isoline is discontiguous at boundary of fracture, which shows that the seepage affects the distribution of temperature field. The change rate of temperture isoline is gradually reduced along the single fissure flow, therefore the rate of heat-transfer is decreased. The influence of fluid temperature to temperature distribution is small, but different fluid temperature obviously affects thermo-isoline.
Research of Product Design in Physically Processed Type Based on Bamboo Composite Characteristics
Authors: Zhang Li Li , Lin Dong Yang
Published: November 2011

Being a natural composite material, bamboo’s biological anatomy structure, chemical components and particularities in mechanical properties have some influences on the processing and manufacturing of bamboo materials. Based on micromechanical analysis and the combination of structural features of its hollow type curved surface and cleavability, this paper discusses about the feasibility about extension design of bamboo pole as a whole for modeling elements, any possible varieties by vertical and horizontal segmentation for diversified combinational designs like enclosure and assembly; as well as rationality about designing products models in association with line-type materials after cleavage and separation. In the meantime, it presents difficulties in processing and utilization owing to bamboo material’s characteristics in geometric configurations such as small diameter, hollowness, multisections, thin wall and taperingness, and also its only longitudinal fibers.
Influence of Parameters on Alumina Particles Size and Morphology
Authors: Zhou Qi , Zhao Hong Liang , Shao Zhong Cai , Song En Jun
Published: November 2011

The sol - gel method is the effective technique to prepare high purity ultrafine alumina powder. Laser particle size analyzer and scanning electron microscopy were used to study the inflence of pH, leaching of precursor sol, surface modification of alumina powder on the secondary particle size. The impact of leaching sol on powder crystal was tested with X-ray diffraction. The results show that: aluminum nitrate solution showed different appearance with different pH values during titration aluminum nitrate solution with ammonia. When pH=3~5.5, the solution occur through no precipitation to the white precipitate, then the solution becomes relatively thin paste; when the pH was from 6.0 to 6.5, the solution becomes more thick paste. When the pH increased from 7.0 to 8.0, the solution has turned into a more dilute paste. The impact of pH on the particle size is: When the pH increased from 5.5 to 7.0, aluminum powder particle size gradually become thicker and larger. When the pH continues to rise, powder particle size is reduced, when the sol pH value is 8.0, it can get the smallest particle size for alumina powder, up to 548nm. Powder average particle size when adding TEA surfactant to sol is less than the sol without any surfactant particle size from the micrograph. Moreover, particle size is more uniform with TEA surfactant, but powder particle size which did not add surfactant to the sol is clear size differences and the dispersion is poor. When the sol containing surfactant, the effect of surface modification is not obvious. In the case of sol without surfactant powder particle size reduced after the surface modification, then powder surface modification is necessary, it can prevent the powder from congregating. The crystal type is relatively perfect and single α-Al2O3 after filtration, the crystal type without leaching is α-Al2O3 and γ-Al2O3, with a smaller particle size, crystal grain size is relatively smaller. If alumina sol isn’t be leached it contains ammonium nitrate, ammonium nitrate will decompose and release various gases during sintering, the gas emission has an crushed effect on the sintered powder.
Fractal Analysis on Bond-Slip Behavior between Steel Shape and Concrete in SRC on Axial Pull-Out Test
Authors: Xie Ming , Zheng Shan Suo
Published: November 2011

Based on the experimental study of pull-out specimens on bond-slip behaviors between shaped steel and concrete in SRC (Steel Reinforced Concrete Structures), the graphic of the whole damage process are obtained. The crack propagation of concrete is fractal analyzed to calculate the fractal dimension. Relationships between fractal dimension and bond-slip behaviors of SRC are discussed. The main factors impact the bond-slip behaviors are studied to established the relationship with fractal dimension. Linear dependence relation of fractal dimension and bond-slip behaviors and the impact factors is discovered. Statistics formula is established to describe the relation of fractal dimension and ultimate bond strengths. All these may contribute to the further analysis of bond-slip performance and fractal behaviors in SRC composite structures.
Experimental Research on Compressive Strength-Size Effect of Ceramisite Concrete
Authors: Yang Wei Jun , Wang Peng
Published: November 2011

Ceramisite concrete was charateristic of size effect as common concret. Through the experimentation of size effect on cubic compressive strength and axial compressive strength,and analysed and research coefficient of size effect by classical theoretics,elicit size effect of ceramisite concrete.
A Challenge for Strain Optical Measurement for Bimetal
Authors: Zhang De Hai , Wang Ming Yi , Li Yan Qin
Published: November 2011

A challenge method composed of digital image correlation (DIC) method, circle coordinate grid technology and finite element (FE) software to conduct strain measurement of bimetal is presented. This approach can carry out the prediction and measurement of strain. The coordinate grids are painted on top and bottom surface of bimetal when experiment and simulate specimen. Each node is named a fixed number in turn, and these numbers can precisely help to identify the same name point between FE software and the experiments specimen. The bimetal sheet has been tested using DIC software, circle center of the coordinates points can be accurately identify on the surface of bimetal. The changing of distance between adjacent points is computed to construct the forming limit diagram before and after forming. It is an effective means to evaluate the forming performance of bimetal and verify the reasonable of FE analysis results. 2A12 metal is conducted experiment using the challenge method in this paper, bimetal has not conduct experiment due to some reasons.
Research about the Effect of Residual Stress on the Fatigue Life of Cruciform Joint of 16MnR Steel
Authors: Yu Ying Xia , He Bo Lin , Yu Huang Huang , Shi Jian Ping
Published: November 2011

Surface treatment was carried out on the cruciform joint of 16MnR steel by using the HJ-II-type ultrasonic impact machine. The impact current is 1.2A, impact amplitude is 30 microns. Fatigue experiments were carried out for impact treated specimen, impact treated and heattreated specimen and un-heattreated specimen. The effect of ultrasonic impact on the hardness of the weldment and weld toe was researched. The experimental results show that the fatigue life of the cruciform joint of 16MnR steel can be significantly improved through the ultrasonic impact treatment and the hardness of weld toe can also be promoted. Compared to the sample without impact treatment, its fatigue life was increased 692.52%. The hardness of weld toe was increased 31%. Compared to the sample with heat treatment, the fatigue life of impact specimen was increased 316.67%. Compared to the sample without impact treatment, the fatigue life of impact and heat treated specimen was increased 218.69%.
Study on Tracking in Interested Moving Objects
Authors: Cui Dong Yan , Xie Zai Xing
Published: November 2011

This paper presents an automatic program to track in moving objects, using segmentation algorithm quickly and efficiently after the division of a moving object, in the follow-up frame through the establishment of inter-frame vectors to track moving objects of interest. Experimental results show that the algorithm can accurately and effectively track moving objects of interest, and because the algorithm is simple, the computational complexity is small, can be well positioned to meet real-time monitoring system in the extraction of moving objects of interest and tracking needs.
The Research about the Application of the Integration of Reverse Engineering and Rapid Prototyping Technology
Authors: Chen Xue Fang
Published: November 2011

This paper describes the method to integrate the reverse engineering and rapid prototyping and analysis the characters and some key problems in the integration. Through two application cases in artwork and industrial products, the application technical method in the integration was demonstrated. The application of the integration can increase company’s ability to develop new products and can accelerate the speed in the development.
Synthesis of Visible-Light-Driven Photocatalyst Ag3PO4 by a Precipitation-Replacement Method
Authors: Nie Long Hui , Huang Zheng Qing , Zhang Wang Xi
Published: November 2011

A visible-light-driven photocatalyst Ag3PO4 was prepared by a novel precipitation- replacement process. The synthesized sample was cubic crystals with the bandgap of 2.16 eV. And most of the particles size was among 0.5~2 mm. The Ag3PO4 shows high photocatalytic activity for the degradation of methyl orange (MO) solution under the visible light (l>420 nm). The apparent ratio constant (kapp) value of Ag3PO4 was about 239 and 50 times that of P25 and C-TiO2, respectively.
Infrared Emissivity of Capacitive Frequency-Selective Surfaces and its Application in Radar and IR Compatible Stealth Sandwich Structures
Authors: Wang Yi , Cheng Hai Feng , Wang Jun , Zhou Yong Jiang
Published: November 2011

Infrared emissivity of capacitive frequency-selective surfaces is affected by many factors, such as metal area, emissivity of medium part, surface roughness, metal oxidation, and surface cleanness, etc. In this paper, the influence of metal area and emissivity of medium part on the emissivity of CFSSs were depicted in detail. Furthermore, a kind of radar and IR compatible stealth sandwich structures, radar absorbing properties of which were calculated by the finite-difference time-domain (FDTD) method, were designed and prepared. We conclude that emissivity of CFSSs will be below 0.3 while metal area is above 80% and radar reflectivity of fabricated sandwich structure will be below -10dB in 8-18GHz.
Identification and Fault Diagnosis of an Industrial Gas Turbine Using State-Space Methods
Authors: Yousefi Iman , Khaloozadeh Hamid , Ashraf-Modarres Ali
Published: November 2011

The objective of this paper is to identify, detect and isolate faults to an industrial gas turbine. The detection scheme is based on the generation of so-called "residuals" that are errors between estimated and measured variables of the process. A State-Space model is used for identification and some observer-based methods are used for residual generation, while for residual evaluation a neural network classifier for MLP is used. The proposed fault detection and isolation tool has been tested on a single-shaft industrial gas turbine simulator.
Adaptronic Systems in Robot Manufacturing
Authors: Denkena Berend , Immel Jochen , Schönherr Marcus
Published: November 2011

Industrial robots are a cost-efficient possibility to face the increasing demands of future production processes. This paper presents an adaptronic approach to improve the structural properties of stateoftheart robots. For this purpose, highly-flexible piezo-based actuator foils and sensors are directly integrated into CFRP components without structural weakening. This paper shows the potential of these implemented measures for the active damping of structural vibration due to chattering while machining and for aprecision positioning even in the sub-micrometer range.
Durability Test System of Four-Channel Motorcycle Wheel Speed Sensor Based on LabVIEW
Authors: Tian Jin Ming , Liang Juan Juan
Published: November 2011

A four-channel sensor durability to intermittent operation of motorcycle test system was given based on LabVIEW. The system provides a good working platform and a Convenient testing tools for the four channels of sensor signal data acquisition, signal analysis and processing. The hardware is composed of four-sensor platform, oscilloscope, servo motor, calibration, and computer. The system operating interface is designed using LabVIEW. The results show that the system could achieve the continuous automatic motor stopping, turning control, it could also sample four channel signals and analysis of the measurement data, automatic judge, real-time display. Compared with the traditional testing method, which saves cost and improves testing efficiency.
Secondary Development of Blades Parametric Design of Hydraulic Torque Converter Based on CATIA
Authors: Guan Peng , Dong Jun Chao , Wu Li Guang
Published: November 2011

Using VB 6.0 and CATIA software, this paper illustrates a method to generate the parameters and three dimensional shapes of the hydraulic torque converter blade automatically, in order to cut the development cycle. Finally, as an example of this methodology, a particular parametric design of a hydraulic torque converter blade is presented to verify the validity of the method by establishing a VB 6.0 program, which can generate the blade parameters and the three dimensional shape of the specific hydraulic torque converter blade.
Single Input Multi Output Adaptive Network Based Fuzzy Inference System for Machinability Data Selection in Turning Operations
Authors: Suhail Adeel H. , Ismail N. , Wong S.V. , Abdul Jalil N.A.
Published: November 2011

The selection of machining parameters needs to be automated, according to its important role in machining process. This paper proposes a method for cutting parameters selection by fuzzy inference system generated using fuzzy subtractive clustering method (FSCM) and trained using an adaptive network based fuzzy inference system (ANFIS). The desired surface roughness (Ra) was entered into the first step as a reference value for three fuzzy inference system (FIS). Each system determine the corresponding cutting parameters such as (cutting speed, feed rate, and depth of cut). The interaction between these cutting parameters were examined using new sets of FIS models generated and trained for verification purpose. A new surface roughness value was determined using the cutting parameters resulted from the first steps and fed back to the comparison unit and was compared with the desired surface roughness and the optimal cutting parameters ( which give the minimum difference between the actual and predicted surface roughness were find out). In this way, single input multi output ANFIS architecture presented which can identify the cutting parameters accurately once the desired surface roughness is entered to the system. The test results showed that the proposed model can be used successfully for machinability data selection and surface roughness prediction as well.
Research on the High Frequency Realization of High-Power Inverter
Authors: Liu Run Hua , Wang Gang
Published: November 2011

The paper presents the inverter method which based on cascade multilevel inverter and MOSFET-assisted soft-switching of IGBT and modulation strategy against the double requirement of high-power inverter and high frequency. The method can effectively improve the output voltage, reduce harmonic distortion and switching losses, improve the switching frequency and meet the double requirement of the high-power inverter and high frequency. The method proved to be feasible by simulation and experiment.
Multi-Rate Digital Control for Pulse Detonation Engine Control Applications
Authors: Wang Xi Hui , Yu Da Ren
Published: November 2011

Pulse detonation engine is a kind of new engine for spacecraft, it is difficult to control for there is no moving parts in engine combustion chamber and detonation speed is very fast. The engine model was given based on thermodynamics equations in the paper. A multi-rate digital controller for a pulse detonation engine based on the engine model was also given. The simulation results show that the control method is effective. The detonation engine model provides a basis for developing and validating controllers capable of controlling the engine.
Improved CMAC Neural Network Control for Superheated Steam Temperature
Authors: Chen Li Jun , Sun Bo , Diao Jian Chao , Zhao Li Li
Published: November 2011

Aiming at that superheated steam temperature system exists the large inertia and large time delay of the dynamic characteristics,and the converge speed of the conventional CMAC neural network is not fast enough to the real-time system, a credit assignment CMAC (CA-CMAC) neural network control is adopted in superheated steam temperature control system, which is proposed to speed up the learning process in CMAC. The simulation of the superheated steam temperature control system shows that CA-CMAC converges faster than the conventional CMAC. This result illustrates the effectiveness of this method.
Using Governor Sensitivity Test Method to Analyze Moment of Inertia of Engine Generator Set
Authors: Teng Wan Qing , Ren Zheng Yi , Wang Zhi Qiu , Lv Bin
Published: November 2011

A new method for estimating the moment of inertia of engine generator set was proposed in this paper, which was defined as Governor Sensitivity Test Method (GSTM). In this method, the moment of inertia of engine generator set was estimated by means of measure transient speed change of engine generator set when the engine load increases suddenly. In the present, there have been some methods for estimating the moment of inertia of engine, such as, Additional Mass Method, Running Down Test Method and Accelerating- Decelerating Method Under No Load. These methods for estimating the moment of inertia of engine generator set all have shortcomings on accuracy or operability. These shortcomings have been overcome by using the GSTM method proposed in this paper. It is easy to operate, and the factors affecting estimation errors are small. In this paper, the basic principle of the GSTM method was discussed. The factors affecting estimation errors ware analyzed. An example of calculating the moment of inertia of an engine generator set using the GSTM method was presented. The result of calculating the moment of inertia of engine generator set was used to simulate the transient speed response of an engine generator set. The GSTM method was verified to be practical by comparing the results of simulation and experiment.
Synchronization Control Strategy Applied in Two Cylinders System of Rolling Mill
Authors: Wei Li Xin , Zhao Jin Chun
Published: November 2011

The inner parameters and outside load of operating-side and driving-side subsystems of rolling mill are different. This difference can lead to an unequal horizontal thickness difference distribution of strip. Synchronous system is being widely applied in industrial field, in order to solve the problem of synchronization control based on two cylinders system of rolling mill, a mathematical model of hydiaulic system is presented, then, a kind of dynamic synchronous control strategy is applied. In the part of controller, the parameters of PID controller are adjusted by self-study. So the PID controller has the capability of self-adaptation. Experimental results show that the method can reduce synchronization error from to and improve the quality of the plate and strip.
Researches on Start Control Strategy of CNG Engine
Authors: Ni Cheng Qun , Zhang You Tong
Published: November 2011

With the discovery of abundant gas hydrate storage, the natural gas will become an important fuel for future vehicles. In order to improve the starting performance of the CNG engine, an electrical control system was developed and the starting control mode was set up according to the engine operating characteristics. The control parameters of injection quantity, injection timing, ignition energy and ignition timing were considered in the model. The tests of start and idle were conducted on a four stroke CNG engine. The results indicated that the CNG engine can start faster and more reliably by using the optimal start control strategy.
Generalized Multiple-Model Adaptive Estimation for Mars Entry Navigation
Authors: Wu Kai
Published: November 2011

In order to satisfy the needs of Mars precision landing, a Mars entry navigation method is proposed for the problem of Mars atmospheric density model uncertainty. The navigation system processes accelerometer outputs as measurements, employs an extended Kalman filter bank regulated by the generalized multiple-model adaptive estimation method. Simulation results demonstrate the navigation system can identify the real atmospheric density model automatically, and show adaptivity and robustness to the uncertainty of atmospheric density. The navigation performance is greatly improved compared with traditional dead-reckoning
Hoist Safety Risk Assessment Model Research
Authors: Yi Jian Gang , Cai Xin , Xu Jin Cai , Li Hong Xuan , Dai Shuang Xi
Published: November 2011

Considering the various factors which influenced the safety of hoist system, and the general objective which was the failure probability of hoist system, it established the safety risk assessment model for hoist system. Then it used the time-varying effect to forecast the failure probability and crash damage of hoist system. It constructed the evaluation index system, and used the AHP method, the fuzzy mathematics method and the method of expert advice on weight distribution at various levels. Based on the evaluation and analysis of Zhuzhuang reservoir projects on the gate crane, it proved that the safety risk assessment model for hoist system was scientific, safety and reliability.
A Mesh-of-Appendixed-Trees-Based Technique Carried on the Crossed Cube
Authors: Zhang Zong Yun , Liu Shi Zhong , Zhang Feng Qing , Yu Chun Hua
Published: November 2011

In this paper, we show how a MAT (Mesh-of-Appendixed-Trees) embedded into the crossed cube which is a variant of hypercube. When we seek to implement this MAT-based mapping scheme on a crossed cube machine, we solve the two following questions: an N×N MAT can be embedded into a crossed cube of 4N2 nodes and the smallest size crossed cube to embody an N×N MAT has 4N2 nodes.
Application of Fuzzy Control in Transformer Cooling System
Authors: Jia Zhen Guo
Published: November 2011

Designed a device with PLC and inverter for transformer cooling control system. The structure of fuzzy controller is built with PLC. By calculating and testing, fuzzy and fuzzy control rules are established. Practical computing for the PLC to control the output lookup table is given. Using this technique, transformer cooling system energy consumption will be reduced, transformer’s coolers life will be extended and transformer cooling system automation level will be increased.
Electromagnetic Design of Dual Stator-Winding Induction Generator System with Boost Converter
Authors: Shi Xian Jun , Liu Ling Shun , Zhang Shu Tuan
Published: November 2011

In this paper, the electromagnetic design of dual stator-winding induction generator with boost converter to raise output voltage under the minimum speed is presented. When the output voltage of power winding is very low and the output current very high, the large winding turns ratio between the control winding and power winding is proposed to reduce the current of control winding. The excited capacitor of power winding and filter inductor of control winding can be canceled. With the boost converter adjusting the out put voltage under the minimum speed, the demand of output voltage of the generator can be achieved. Design results show it is much benefit for reducing the dimension ,cost and weight of the system.
Path Planning of Avoiding Obstacle for Fruit-Picking Manipulator Based on Position Information
Authors: Wang Yu Fei , Yin Jian Jun , Chen Shan Feng
Published: November 2011

Motoman SV3X manipulator was used to pick fruit and chosen as research object. Under the instance of known space coordinates of fruit and space position and pose of erect obstacle, a kind of multi-joint angle computation and path planning method for Motoman SV3X was proposed. Firstly, several sets of joint angles were computed according to relative space position between fruit and erect obstacle. And then, one set of joint angle was chosen as terminal angle of path planning. Finally, algorithm was used to plan a obstacle-avoiding path from start angle to terminal angle. The method solved the computation problem of multi-joint angle, and has universality for the problem of avoiding erect obstacle for fruit-picking manipulator. Simulation tests under the environment of Matlab showed that solved joint angles of manipulator can both make Motoman SV3X avoid erect obstacle and end-effector reach preconcerted position with given position error, and validated the correctness of the path planning method.
Design of Direct Yaw Moment Control System to Enhance Vehicle Stability Based on Fuzzy Logic
Authors: Xu Zhe , Wei Min Xiang , Wang Yang , Wei Jian Wei
Published: November 2011

Vehicle running at high speed if affected by crosswind or steering handling may spin or drift out since the yaw moment produced is not big enough to stabilize it. In order to prevent these dangerous situations, a fuzzy direct yaw moment controller is designed in this paper, since it is simple and suitable for nonlinear system. This vehicle stability control system is based on model following control method. The side slip angle and yaw rate which indicate the vehicle’s stability and handling performance are chosen as the control variables. The response of the bicycle model is selected as the reference value. In order to evaluate the performance of the controller, simulations of lane change and J-turn maneuver are carried out. The results show that the stability and handling performance of the vehicle are improved.
UAV Automatic Landing Control Law
Authors: Liu Mao Han , Li Chun Tao , Wang Yi
Published: November 2011

Landing is the most important stage of the Flight of UAV, the study of automatic landing of UAVs has important engineering significance. In this paper, the UAV landing trajectory is divided into approach phase, steep glide phase and flare phase; a cascade control structure controller of height tracking was applied and the landing control law was designed. The digital simulation was done in the MATLAB / simulink environment. The results of simulation indicated that UAV can track the designed landing trajectory very well under the control law of automatic landing and safe landing can be achieved.