bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Oleophobic Characteristics Technology of Fluorined Polyethylenic Microspheres
Authors: Fei Yi Wei , Li Xiao Yue , Tong Li Ping , Yang Hong Wei
Published: June 2012

This paper analyzes the oleophobic characteristics of fluorined polyethylenic microspheres, by the way of gaining weight change experiments in 75# aviation gasoline under the conditions of 50, 70 and 90°C temperature, and indicates that the fluorined polyethylene microspheres have better oleophobic characteristics, and finally it is also pointed out the realistic significance about the application of surface-fluorinated treatment technology in soft overlay roof oil-tank.
Study on the Surface Quality of Titanium Alloy in Ultrasonic-Assisted EDM Milling
Authors: Zhang Yun Peng , Sun Guang Biao , Zhang An Zhou
Published: June 2012

In order to improve the surface quality of titanium alloy in electric discharge machining (EDM) milling, presents electrode ultrasonic vibration assisted EDM milling in the kerosene fluid which fills with 12g/L SiC abrasive particles. By the comparison test of surface roughness between EDM milling and abrasive particle ultrasonic vibration assisted EDM milling in short pulse(pulse width less than 1μs), it is found that ultrasonic vibration role of SiC particle could effectively improve surface roughness from Ra 0.5μm to 0.2μm. The recast layer and surface crack are analyzed by scanning electron microscope (SEM).Results show the thickness of recast layer reduced 20-30μm and surface crack decreased obviously under the role of abrasive particle ultrasonic vibration. It shows that the combined action of ultrasonic vibration and abrasive particle can dramatically improve the surface quality of titanium alloy in EDM milling.
Synthesis and Adsorption Characters of Silica Hollow Spheres
Authors: Qiao Feng Xia , Ding Qi Gang , Lin Zhi Ping
Published: June 2012

A kind of ordered meso-sized hollow silica spherical material was prepared by hydrothermal route using monodispersed cross-linked polymethyl polymer spheres as template, metacrylate tetraethyl orthosilicate as a silica source. The calcination was empolyed for the removing of template and generation silica hollow spherical materials with meso-sized pores. The adsorption performance of the obtained hollow silica spheres was investigated and the results indicated that the obtained hollow silica spheres had high adsorption capacity for sulfadimethoxine. They were sucessfully used as the dispersive adsorbent for matrix solid phase dispersive extraction sulfadimethoxine from chicken tissue with satisfactory results.
Synthesis and Characterisation of Controllable Hairy-PANI Nanofibers with Perchloric Acid
Authors: Wang Hai Yan , Zhang Xuan Xuan , Wei Liang , Zhen Min Jing , Kong Lin Bing
Published: June 2012

Shape-controllable polyaniline (PANI) nanostructures varying from fibers to hairy-PANI were synthesized via chemical oxidation polymerization with perchloric acid as dopant. It has been achieved just by adding extra aniline in the later phase of the same reaction or by adjusting reactive temperature. The diameters of the hairy-PANI fibers can be controlled to 300nm. Scanning electron microscopy was applied to investigate various kinds of morphologies. The mechanism of forming hairy-fiber morphologies was proposed to the mole ratio of aniline to APS in the later polymerization phase. X-ray diffraction pattern suggested that PANI were an amorphous character. Conductivity of polyaniline synthesized at room temperature was only 10-1 S cm−1 level. The specific surfacearea of the hairy- fibers PANI is more than that of fibers PANI.
Synthesis of Carbon Onions Including Fe3C by Chemical Vapor Deposition Using an Iron Catalyst Supported on Sodium Chloride
Authors: Chen Lei Shan , Wang Cun Jing , Chen Gai Rong
Published: June 2012

Carbon onions including Fe3C were synthesized by the catalytic decomposition of acetylene at 400 °C using iron supported on sodium chloride as catalyst. The samples were examined by high resolution transmission electron microscopy, energy dispersive spectroscopy, and X-ray diffraction. The results show that carbon onions including Fe3C core with a structure of stacked graphitic fragments and diameters in the range 15-50 nm were obtained. When the product was further heat-treated under vacuum at 1100 °C, carbon onions with a clear concentric graphitic layer structure were obtained.
Synthesis of Gold Nanoparticles Stabilized by 3-(Aminopropyl)Triethoxysilane through (N, N-Dimethylformamide) Reduction
Authors: Chen Yan Ming , Wang Jing
Published: June 2012

gold nanoparticles were synthesized in DMF (N, N-dimethylformamide) solution by using 3-(aminopropyl)triethoxysilane as stabilizer through wet chemical route. A characteristic surface plasmon band can be observed for the obtained gold nanoparticles from UV-vis absorption spectra, which indicate that KH-550 can serve as stabilizing agent for the formation of gold nanoparticles. The influence of reaction temperature, reaction time and precursor concentrations on the formation of gold nanoparticles is investigated through UV-vis absorption spectra. The results show that surface plasmon absorption peak could be red-shifted when reaction temperature, reaction time and precursor concentrations increase. Transmission electron microscopy (TEM) results show that the obtained gold nanoparticles with spherical morphology have a narrow size distribution.
Design and Simulation Study of a New Type of Dual Mass Flywheel
Authors: Chen De Min , Shi Xiao Fei , Liu Guo Qiang
Published: June 2012

In order to research the influence of the main parameters of Dual Mass Flywheel to the torsional vibration of the transmission system, one heavy vehicle was taken as the target vehicle and its dynamics models of transmission system in the idle conditions and the driving conditions were established by ADAMS.Then the main design parameters of Dual Mass Flywheel were gained through simulation and optimization.Finally,a new Dual Mass Flywheel,whose vibrating springs are distributed on both sides of the damping disc,was designed and its damping effect was studied through simulation research.
Synthesis of Rare Earth Catalyst LLa[N(TMS)2]•DME(L=3,5-But2-2-HO-C6H2CH-NH-C5H4N) and Catalytic Behavior for Polymerization of Rac-Lactide
Authors: Zhu Xi , Wang Yao Rong
Published: June 2012

A dianionic phenoxyamido ligand was the first to be used to stabilize organo-rare-earth mental amido complex. Amine elimination reaction of La[N(SiMe3)2]3(THF)2 with 3,5-But2-2-HO-C6H2CH-NH-C5H4N in a 1 : 1 molar-ratio gave the anionic phenoxyamido neodymium amide LLa[N(TMS)2]•DME (1) in a high isolated yield. Furthemore, the catalytic behavior of complex 1 for the ring-opening polymerization of rac-lactide was explored.
Synthesis of Zinc Hydroxystannate Single-Crystalline Nanocubes and its Flame Retardancy for Rigid PVC
Authors: Yang Ling , Niu Ying Jian
Published: June 2012

Zinc hydroxystannate (ZnSn(oh)6 , ZHS) nanocubes have been obtained for the first time through a simple method by hydrolyzation of Tin (Ⅳ) chloride (SnCl4.5H2O ) reacting with zinc chloride (ZnCl2) in aqueous alkali at the presence of solid sodium hydroxide (NaOH ). The X-ray diffraction data show that the phase obtained has a cubic-type structure. The Environmental Scanning Electron Microscope (ESEM) images testify that the product grows into cubic poly-crystals having a mean edge length of 380nm, with a standard deviation 20 nm.. Fire retardant (FR) properties of rigid polyvinyl-chloride (PVC) using the prepared ZHS and traditional antimony trioxide (Sb2O3) as fire retardant and smoke suppressant are evaluated by Cone Calorimeter.
The Inhibition Effects of Wood Light Induced Discoloration Coating with Water-Based Acrylic Varnish
Authors: Liu Yi , Gao Jian Min , Fu Zhan , Zhang Ya Chi , Guo Hong Wu
Published: June 2012

In this paper, we used water-based acrylic varnish to coat poplar and pinus sylvestris veneer, discussed the inhibition effects of veneer light induced discoloration with two coating ways which were paint coating and film covering. The result showed that, after paint coating or film covering, the lightness aberration of veneer ΔL* and chromatism ΔE*ab were significantly reduced. The inhibition rate of veneer light induced discoloration with film covering was 7.88% higher than that with paint coating, reaching 30.41%.It mainly because of the small change of color index b* of film covered veneer, the water-based varnish film to a certain extent could inhibit the wood photochemical consequences by ray radiation. It’s feasible to study light induced discoloration of coated veneer by the method of film covering.
The Wear Property of Plasma Sprayed Nano-Structured Al2O3-13%TiO2 Coating
Authors: Ding Hong Sheng , Cheng Zhi Fang , Rong Hui , Lu Lin
Published: June 2012

Nano-structured Al2O3-13%TiO2 coating was deposited by air plasma spraying. Wear properties of the coatings under different load trough SRV friction and wear testing machine were studied, the results showed that wear mass loss of Al2O3-13%TiO2 coating by plasma spraying slide with ZrO2 and Si3N4 increase with load increasing, but the difference is that wear loss of coaing slide with Si3N4 ¬is lower than the coating slide with ZrO2 when load is less than 40N. Opposite phenomenon will occur when load is higher than 40N.The wear surface morphology was analyzed trough scanning electron microscopic, the results showed that coating slided with Si3N4 ball when matching at low loads, with a shallow furrow shape grinding. There were wide and deep furrows while at higher loads. Coating slide with ZrO2 ball has no obvious cracks, no layer spalling.Wear was occurred by micro cutting.
The Wearability Test and Comprehensive Evaluation of Knitted Fabric Made of Banana Fiber
Authors: Liang Yong , Meng Jia Guang , Wan Min
Published: June 2012

The article briefly introduced the wearing characteristic and the test method of fiber knitted fabrics, like comfortableness, fastness, and the banana property. Finally use the fuzzy comprehensive evaluation method to analyze and estimate the wearing characteristic of banana fiber knitted fabric. And then reach a kind of stitch with the optimum wearing characteristic.
Three Dimensional Stainless Steel Bone Scaffolds: Using the Electrochemical Technique to Coat Hydroxyapatite on Stainless Steel Braids
Authors: Lou Ching Wen , Chen Yueh Sheng , Lin Ching Wen , Huang Chien Lin , Chen Wen Cheng , Lin Jia Horng
Published: June 2012

Ceramics and metallic material are commonly used in biomedical filed. Ceramic material, such as hydroxyapatite (HAP), is bioresorbable and has osteoconduction and osteoinduction. Metallic material, such as stainless steel (SS), possesses good mechanical properties and chemical stability. Thus, the study aim was combination of the two together can form the bone scaffold applied in bone tissue engineering, providing desirable support, cell growth, and cell attachment for bone tissue. This study method is braid the SS filaments into a three-dimensional structure of braid. By electrochemical technique, HAP is then coated on the braid, forming the three-dimensional HAP/SS bone scaffold. Simulated body fluid, the electrolyte solution, is heated into various temperatures to simulate the environment, and the current supplied in the electrochemical technique remains constant. A scanning electron microscope (SEM) observes the surface of the scaffold, and energy dispersive spectrometer (EDS) further evaluates the HAP attachment in terms of calcium-phosphorus (Ca/P) ratio, determining the optimal Ca/P ratio that is similar to that of human bone tissues to accelerate recovery of bone tissues. The result shows three-dimensional HAP/SS bone scaffolds are covered with HAP particles.
Toughened Epoxy Adhesive Modified with Core-Shell Nanoparticles Containing Epoxy Groups on the Surface
Authors: Zhang Xu Gang , Zhang Bin , Sun Ming Ming , Li Jian Hui , Wang Lei , Gang Xue
Published: June 2012

The epoxy resins were toughened with reactive core-shell nanoparticles(CSNPs) with butyl acrylate (BA) as the core and methyl methacrylate (MMA) copolymerizing with glycidyl methacrylate (GMA) as the shell. The chemical structure of the CSNPs was characterized by FT-IR. The morphology of toughened epoxy networks were analyzed by SEM and TEM, and their adhesion properties were also detected. The results show that mixing methods and CSNP concentration have great influence on the morphology and adhesion properties of the toughened epoxy networks. CSNPs are uniformly dispersed in the epoxy resins by the grinding method. The modified epoxy networks obtained from the modified epoxy networks prepared by the grinding method(MEPN2) with 10 wt% CSNPs show the best adhesion properties, and the increase in maximum peel strength, 25°C sheer strength and 150°C sheer strength of the modified epoxy networks is 401.3% , 46.9% and 27.6% respectively over the unmodified epoxy networks due to the small-scale coagulations of CSNPs.
A New Method to Study the Thermal Fatigue Resistance of Molybdenum by High Power Laser Irradiation
Authors: Lu Shuai , Li Hong Wei , Yu Dun Bo , Pang Ming , Wang Bo
Published: June 2012

In single roll rapid quenching molding, especially for the preparation of amorphous ribbons and rare earth permanent magnetic materials, the chilling roll is an extremely important component of the preparation equipment. However, frequent repair of the roll is not conducive to continuous large-scale production because of its poor thermal fatigue resistance. Molybdenum is gradually being used as chilling roll material in some applications, and in the present paper a new approach to study the thermal fatigue resistance of molybdenum is based on laser pulse irradiation on the molybdenum surface. A new designed device effectively prevents the molybdenum to be oxidized during the laser heating test. The experiments of thermal fatigue damage on molybdenum were conducted by the high power laser. The results shows that the fatigue cracks had been propagated in the irradiated region after the specimen was loaded by 200 times pulsed laser heating. There is a greater crack density in the laser heating brim region than in the center of the irradiated region. According to the transgranular mode of crack propagation in the laser heating brim region and intergranular mode in the center of the irradiated region, the maximum stress took place at the intersection region due to the great temperature gradient in the laser heating brim region. Continued basis-oriented experiments are planned, regarding the mechanism of thermal fatigue crack initiation and propagation for chilling roll materials.
Manufacturing Technique of the Biocompatible Polymer Nanofiber Membrane by Electrospinning
Authors: Lin Jia Horng , Hu Jin Jia , Lu Chao Tsang , Chen Wen Cheng , Huang Chien Lin , Lou Ching Wen
Published: June 2012

This research produced nanofiber membrane with polyethylene oxide (PEO) by electrospinning; the influence of the three parameters —mixture ratio of solution, electric field, and distance between the capillary tip and the collecting plate, on electrospinning was then explored. According to the results of the experiment, the fiber membrane with a diameter of 120 nm could be obtained when the optimum electric filed was 0.6 kV/cm and the distance between the capillary tip and the collecting board was 15 cm. Finally, the spunlace nonwoven was coated with the electrospinning solution with the optimum parameters, creating the asymmetric dressings.
Kinetic Compensation Effect of Kinetic Parameters of Thermal Explosion Test
Authors: Shao Ying Hui , Liu Zi Ru , Ren Xiao Ning , Heng Shu Yun , Yue Pu , Xu Xi Ning
Published: June 2012

The kinetic parameters of thermal explosion tests with five-second delay for 273 energetic materials were analyzed. The compensation effect exists between the two thermal explosion kinetic parameters of these energetic materials, e.g. lnA and Eb. The kinetic parameters of these energetic materials can be expressed by a single linear regression equation for the single compound or mixture under all conditions. The slopes of the regression equation for various systems are in the range from 0.1952 to 0.2413 (mol•kJ-1). The regression equation for single compound or mixture with one type of energetic material as main component has better linearity. Therefore, their “iso-kinetic temperature” Tik is close to their thermal explosion temperature Tb and the “iso-kinetic delay period”τik is also close to the 5 seconds.
Research on the Magnetic-Induced Mechanical Performances of Magnetorheological Elastomers
Authors: Lv Zhi Qiang , Yu Wei Xiong , Yang Xue
Published: June 2012

Magnetorheological (MR) elastomers are a branch of MR materials. The field-dependant characteristics make it have a wide prospective application. The development of MR elastomers was introduced, such as the physical model, the magnetic-induced performances and testing methods. The directions of further study were put forward.
Design of the PRO/MECHANICA to Variable Cross-Section of Micro-Mechanical Cantilever Based on the Finite Element Method
Authors: Wei Chun Li , Zhang Wei , Wei Hui
Published: June 2012

Abstract: In order to achieve the design of micro-machined micro- mechanical cantilever beam of variable cross-section through the PRO / MECHANICA micro-mechanical variable cross-section cantilever beam to mathematical modeling , analysis model , a standard static analysis , the primary design model , the local sensitivity analysis, global sensitivity analysis and optimization design aspects . By the analysis of research data , this body design is feasible and adaptable stress distribution characteristics of a good , good appearance of the structure .
Change in Capacitance with Pore Structure of Microcellular Foamed ABS
Authors: Kim Young Ho , Ahn Jeonghun , Cha Sung Woon
Published: June 2012

An experiment was conducted to confirm how changes in characteristics due to the porous structure apply to the electrical characteristics as the pore size decreases in polymer foam. ABS material, whose foaming process is relatively easy to control, was used to control the foaming ratio by adjusting the foaming temperature. A change in capacitance was observed as a result of the experiment. When the foam structure was analyzed and numerically recorded, it was confirmed that the changes in distribution, according to the specific volume and variation in capacitance, showed similar tendencies.
Studied on Interaction between ADN and (NC+NG) by TG Technology
Authors: Ren Xiao Ning , Shao Ying Hui , Zhang Gao , Zhao Fen Qi , Liu Zi Ru , Xu Ruo Qian , Heng Shu Yun
Published: June 2012

The interaction between ADN and (NC+NG) was studied by isothermal and non-isothermal thermogravimety. The mechanism functions and apparent activation energy and pre-exponential constant have been fitted and calculated by the Arrhenius method, and at same time compared the dates with calculated by Kissinger’s and Ozawa’s method. The result showed that using isothermal thermogravimetric analyzer method studied interaction and model function of（NC+NG）/ADN (1:1) mixture system was trusty and in reason，in selected testing temperature compared NC/NG single system and ADN single system with （NC+NG）/ADN mixture system and found that model function have not changed in evidence，apparent activation energy and activation velocity have varied, at atmospheric pressure and isothermal condition, there being interaction at double-base bond (NC/NG) with oxidizer (ADN).
Investigation on Constitutive Equations for TA15 during Hot Working
Authors: Zhang Yan Shu , Sun Yan
Published: June 2012

Hot compression tests were conducted on Gleeble-1500 thermal simulator for TA15 titanium alloy at temperatures of 750~1050 °C and at strain rate of 0.001 ~ 1 s with a deformation reduction of 60%. The results show that the flow stress of TA15 titanium alloy increases rapidly to a peak with deformation strain, then decreases to a saturation status. The steady and peak stress significantly decreases with deformation temperature increasing and strain rate decreasing. The activation energies (Q) are 619.264kJ/mol in (α+β) phase and 522.58kJ/mol in β phase, respectively. It was found that the parameters, peak stress σp, steady stress σres, peak strain εp and steady strain εres, have linear relationships with Zenner-Hollomon parameter, Z.
Study on Properties and Preparation of Films by Unbalanced Magnetron Sputtering
Authors: Jin Jie , Yang Jia , Ni Mao Lin
Published: June 2012

TiAlN films were prepared by closed field Unbalanced Magnetron Sputtering ion plating. EDS, XRD and SEM were used to test the films’ chemical composition, microstructure and surface morphology. In addition, the films’ surface microhardness, bonding strength and friction coefficient were also determined. The experimental results indicate that the TiAlN films of different substrate hardness have dense film structure and the same chemical composition, the hard substrate microhardness of the film can reach 2575 HV0.025 and soft substrate can be up to 2295 HV0.025, the bonding strength of which is respectively 59N and 56N, Friction coefficient is 0.45 and 0.5.
Preliminary Study of the Application of PET Knitted Fabrics in Artificial Bone Scaffold
Authors: Lou Ching Wen , Li Mei Hui , Chen Wen Cheng , Hu Jin Jia , Lu Chao Tsang , Lin Jia Horng
Published: June 2012

Having good mechanical strength, biocompatibility, and workability, polyethylene terephthalate (PET) is often used as a biomaterial. In this study, PET filaments with various deniers are made into plied yarn with various coefficients of twist. The plied yarn is then made into PET knitted fabrics. Mechanical property tests are performed to determine the differences among the various PET knitted fabrics. Finally, by using cell culture, the PET knitted fabrics are analyzed and evaluated with their cell attachment.
Research for Knitted Fabric Made of Outlast Air-Conditioning Fiber
Authors: Wu Zhen , Meng Jia Guang , Chen Shao Fang
Published: June 2012

The article briefly introduced the wearing characteristic and the test method of Outlast Air-conditioning fiber knitted fabrics, like comfortableness, fastness, and the moisture permeability and so on. Finally use the fuzzy comprehensive evaluation method to analyze and estimate the wearing characteristic of Outlast Air-conditioning fiber knitted fabric. And then reach a kind of stitch with the optimum wearing characteristic.
Determination of Interface Heat Transfer Coefficient for Cylindrical Casting by Using an Inverse Heat Conduction Model
Authors: Zhang Li Qiang , Wang Rong Ji
Published: June 2012

For accurate simulation of the casting process with permanent mold, the correct Interfacial Heat Transfer Coefficient (IHTC) is highly important. However, its value is not easily obtained through the experimental or theoretical method in the complex solidification process. In this paper, an inverse conduction model is introduced to determine the IHTC at casting-mold during solidification of the cylindrical casting based on the temperature-measured data. The established inverse model is verified to be a feasible and effective tool for estimation of the metal-mold IHTC during solidification of cylindrical casting by the analysis of calculated results.
An Alternative Method to Optimize Octagonal-Ring Transducer
Authors: Sun Yu Jing , Hao Miao , Liu Yang , Liu Cheng Ming
Published: June 2012

Nowadays there is no precision theory to determine the parameters of an octagonal ring type transducer with high sensitivity and adequate stability according to its load condition. Stress design criterion and a method to optimize octagonal ring based on finite element method (FEM) are proposed. Full-load stress distributions in P and F directions of 3 octagonal-ring transducers are studied by FEM, and the stress prediction precision of FEM is validated by experimental calibration. Experiment results suggest that the FEM predicted max stress is less than the stress design criterion both in P direction and in F direction. The average relative errors are all less than 20%. With fully loaded stress distributions of octagonal-ring sensor, results from FEM are of contribution to optimize transducer structure. Compared with conventional experimental method, analysis based on FEM is efficient and intuitionistic, and can supply theoretical guidance to design a transducer.
Analysis and Control of Unknown In-Vehicle Network System
Authors: Wu Yu En , Hu Yu Hui , Jin Ya Ying , Xi Jun Qiang
Published: June 2012

A CAN-Bus protocol analysis and verification method with three key aspects which are static analysis, dynamic analysis and verification &control is put forward. Static analysis ascertains the communication information of each node by bus residual method; Synchronous contrast method is put in use to obtain practical and effective control protocol in the dynamic analysis; Verification &control is to verify the correctness of the analytical protocol and to achieve the control of the critical subsystems by bus gateway system. This scheme has been used to analyze a foreign parallel hybrid powertrain system, and it proves the correctness of the designed static analysis and dynamic analysis, the applicability of verification &control.
Decoupling Compensation Using in the Hydraulic-Servo System of Mould
Authors: Li Liang , Zhou Xiong , Deng Xiao Gang
Published: June 2012

The hydraulic-servo system of mould is a typical two-dimensional hydraulic-servo system, what stored among pass way was handed in and uniting interfering with between every pass way of the system. Because of the connection of the load system, output and control of every pass way influencing each other, cause the coupling of load, influence the system, even cause the systematic instability. This text apply on coupling and decoupling principle, mutual interference problem of many pass way that exists in the hydraulic system of mould, is studied by decoupling compensation control. Through the theory pushing over, we bring forward the decoupling compensation method, which can solve mutual interference problem. Have verified the feasibility of this method in the real artificial experiment too, and can solve mutual interference problem in the hydraulic and systematic of mould effectively.
Design and Realization of the Mobile Robot with Caterpillar Double Accused for Extinguishing
Authors: Xu Ying , Yuan Lei , Duan Jin Tan
Published: June 2012

In this paper, two kinds modes of the mobile robot made fire caterpillar method are presented, manual control and automatic control,can this not only make it have the performance of the movement in cross-country, but also realize the early warning and effective extinguishing the fire by carrying the flame using sensors and connecting rod type fire extinguishing actuators.This paper introduce the robot structure design, fire extinguishing actuators, control system design, operation analysis and the realization of two-way control mode , provide the reference for minitype ground mobile robot and the related technology research.
Design of Gun Barrel Exterior Wall Temperature Measurement Device
Authors: Jia Chang Zhi , Xu Dong Sheng , Liu Guang Sheng , He Yao Xin
Published: June 2012

The temperature of the gun chamber interior wall is an important parameter for the research of the gun barrel life, and the heat transfer by conduction rule between the barrel interior and exterior wall can be ensured by measurement extrapolation method or method of finite element. By choosing a suitably, designed a measurement device of the gun barrel temperature which can be used to measure and memorize the exterior wall temperature of the gun barrel.
Design of Tower Crane Intelligent Monitoring Management System Based on PLC and WinCC
Authors: Zheng Ming Gang , Zhu Xiao Hui
Published: June 2012

In this paper, an intelligent monitoring management system of tower crane is designed based on PLC and WinCC. As the core of tower crane electrical control unit, PLC processes the data from sensors and transmits the operation parameters to WinCC configuration screens for real-time display. The system can give the alarm when overweight, high torque or too large inclination happens, and anti-collision self-learning function is added in the system. The experiments prove that the system can play a good role in tower crane safety protection.
Development and Experiment of ESD Simulator Console
Authors: Yang Shi Liang , Li Teng , Yuan Xiao Mei , Wu Chao
Published: June 2012

This paper put forwards the overall design idea and scheme for ESD simulator console, which conducts analysis on the two key technologies of motion control system, i.e. control motor and programmable control. In this paper, test comparison regarding the experiment of repeatability of air discharge current wave form of ESD simulator has been conducted. The results indicated that repeatability of air discharge current wave forms has been improved to some extent.
Finite Element Analysis of Four-Leg Capacitive Accelerometer
Authors: Ma Shu Min , Chen Chao , Wang Tao , Zhang Huan , Zhou Hong Xi
Published: June 2012

MEMS are the manufacturing of a wide variety of items that are mechanical and electronic in nature. This paper describes a capacitive accelerometer technology using sense element structures. The sense element consists of a symmetrically flat plate of mass supported by four L shaped cantilevers, beams and frameworks. Capacitor plates located on the surface are used to detect the displacement. By using the finite element analysis method to build a model, analyzing the maximal displacement of mass, resonant frequency and stress of cantilever beam with different length, width and thickness.
Fuzzy Control Strategy of the Mixed Magnetic Levitation Bearing Rotor System
Authors: Zhou Xiao Bin , Zeng Li , Xu Zheng Jie , Hu Dao Tian , Yang Yan Neng
Published: June 2012

This paper proposes a Fuzzy Control strategy of magnetic levitation bearing rotor according to the mixed magnetic levitation bearing. Combined with electromagnetic winding working principle, this paper uses the self-sensing displacement self-diagnosing system instead of the special displacement sensor, makes a no sensor self-diagnosing magnetic suspension control system, controls the system by the fuzzy PID (proportional, integral and differential) controller, and builds a mathematical model of the control system. Analyzing the fuzzy rules and fuzzy control principle of the fuzzy PID controller setting parameters, this paper has a fuzzy simulation for the system.
Research of Trajectory Tracking Control of Cruise Missile Based on Observer
Authors: Hao Bo , Li Fan , Zhao Jian Hui
Published: June 2012

To achieve cruise missile accurate trajectory tracking control, an observer-based tracking control method is designed. An observer is developed to estimate the states and control signals of desired trajectory as the inputs of the tracking controller. The linear quadratic optimal control is used to realize full-state feedback control for trajectory tracking. A certain cruise missile is used for the tracking simulation and the result shows satisfactory performance, the control method is simple and suitable for engineering applications.
The Reliability Analysis of Multi-Operation State Repairable System
Authors: Luo Rui Meng , Yao Jin Yong
Published: June 2012

To describe precisely the performance characteristics of Markov repairable systems, the model of Markov repairable systems with multi-operating state was introduced. There are three kinds of states of the system: normal, abnormal and fault state. The system works when it is in the normal state and abnormal state, it stops to be mended till it is inspected and diagnosed in abnormal state or something wrong happens in it. Inspect it at intervals after it begins to work in the normal state until it is inspected and diagnosed in abnormal state or it fails. The life of the system, inspection time intervals and repairing time follow exponential distribution, we build the Markov mathematic model to the system. The steady-state reliability and the expression of steady-state yield are derived by using the Markov process method. The study of numerical examples has shown that optimal inspection strategy can increase the system economic effectiveness.
Signal Analysis Module of NC Machine Tool Based on C Language
Authors: Cheng Yao , Hu You Min , Wu Bo , Xuan Jian Ping , Jia Guang Fei
Published: June 2012

In the monitoring of a NC machine tool (NCMT), signal analysis is one of the most important considerations. In order to process multi-information in a comprehensive way and integrate with NC systems in a stable way, a signal analysis module (SAM) with various feature parameters programmed in C language is proposed. Experiments are carried out in Huazhong NCMT to verify the validity of the presented SAM. The work described in this paper can be applied to almost all NC systems and industrial computers with different operating systems (OSs).
Research and Design of the Biped Robot Gait Parameters
Authors: Zhang Dan Tong
Published: June 2012

A simple and intuitive scheme about online locomotion pattern generation of dynamic walking for biped robot is presented to solve the complex joint trajectory design. A modeling which based on Cartesian Coordinate system and generalized coordinates was proposed. The gait planning of the biped robot was studied by using the method of 3rd order spline interpolation algorithm. The hip and impatient joint trajectory of the robot was emulated using Matlab. The result shows that the algorithm can make a continuously smooth moving trajectory of position and velocity, resulting in the moving trajectory of manipulation continuously smooth, which satisfies the industrial robot need.
Dynamics Analysis of 3-TPS/TP Parallel Robot’s Moving Platform
Authors: Luo Ji Man , Xing Zhi Hui , Jiang Yang , Zhang Xiao Tong , An Yu Zhen
Published: June 2012

The purpose of this research work is to find the relationship between the driving force (F) of 3-TPS/TP parallel robot’s moving platform and the motion of tool tip, and provide reliable basis for the robot control. The Lagrange method is adopted to establish the dynamics model, and the results of the simulation by MATLAB are given in this paper. The movement of tool tip can be described by the angle α and β rotated around X-axis and Y-axis respectively, and the displacement z in the Z direction. The simulation results show that the value of F increases with the increase of the value of z, namely when the total length of the transmission rod decreases, F will increase to overcome the resistance caused by telescoping.
Edge Distance Determination for Aeronautical Thin-Walled Structures with Automated Riveting
Authors: Guo Fei Yan , Wang Zhong Qi , Yang Bo
Published: June 2012

In the process of automated riveting, the position between the riveting head and the holes distributed on the stringer and wing skin to be riveted will go beyond the design requirements currently. Using the edge distance determination technology to measure and compensate the deviation in time is one effective method to solve this problem. In the dissertation, after the characteristic of the edge distance determination technology is introduced, the working principle of the edge distance tracer apparatus is developed. Based on the mechanical design solution, a pressure sensor is selected to measure the position relationship between the riveting head and the stringer. Then an edge distance tracer apparatus is struck out to detect the deviation, which is an automatic positioning feedback device that can be fit for many kinds of stringers. And the riveting head is operated to meet the design deviation requirements. By using this technology, the drilling precision of the automated riveting system can be effectively improved.
Effect of Surface Roughness on Performance of Spiral Groove Gas Film Face Seal
Authors: Ma Gang , Zhao Wei , Shen Xin Min
Published: June 2012

The three dimensional model was established for studying performance of spiral groove gas face seal. According to machining features of different surface area, the seal face can be divided into three parts, rotor ring grooved area, rotor ring non-grooved area and static ring area. The effect of roughness on seal performance was analyzed based on calculation of three dimensional flow field. The analysis results show that the surface roughness of rotor ring grooved area has great influence on the seal performance, but the influence is little when roughness on non-grooved rotor ring surface and static ring surface. The influence must be considered when surface roughness of rotor ring grooved area bigger than 0.2μm. Roughness of rotor ring surface can increase the loading force while it also can cause the increase of leakage. It is important to select rational roughness when designing gas face seal.
Experimental Study on Bendability of Thin-Walled 6061-T4 Tube under Different Bending Velocities
Authors: Li Heng , Yang He , Tian Yu Li , Shi Kai Peng
Published: June 2012

The larger bending velocity is needed in practice to improve efficiency of tube bending, however, whether it has undesired effects on bending behavior has not been identified and clarified. In this study, taking thin-walled 6061-T4 Al-alloy tube of Φ50.8×0.889×101.6mm (out diameter D×wall thickness t×bending radius R) as the objective, the physical experiments are carried out to explore the influence rules of the bending velocity on tube bending in terms of major defects such as wall thinning, wrinkling and springback. The results show that: 1) both higher and lower bending velocities result in excessive wall thinning and wrinkling. 2) springback angle increases with increasing of bending velocity.
Feature-Based Identification and Reconstruction of Regular Curves and Surfaces
Authors: Ye Tie Li , Li He , Zeng Qing Liang
Published: June 2012

Based on the preprocessed measuring data, this paper proposes a method for identification and reconstruction of regular curves and surfaces including straight line(segment), circle(arc), four-sided plane and right cylindrical surface. Considering the geometric feature of each kind of regular curve or surface, the paper studies the corresponding algorithm for identifying the curve or surface point set, reconstructs the curve or surface and gives the parameter equation.
Finite Element Analysis of Impact of Root Fillet on Bending Stress for Helical Gear of Automotive Transmission
Authors: Xie Fei , Wang Jian Hua , Wang Yun Cheng
Published: June 2012

On the basis of the analysis of special demand of helical gear of automotive transmission, gear precision modeling and finite element analysis of bending stress were carried out in this paper. In UG three-dimensional modeling environment, helical gear model was generated and imported into ANSYS software. Then the meshing on the geometric model and influence on gear strength with different radius of root fillet were discussed. The paper provided certain methods to guide the gear parametric design, strength analysis and improve optimization design efficiency of transmission gear parts.
Finite Element Analysis of the Bionic Tissue Engineering Scaffold for the Defect Cranium
Authors: Peng Fan Fen , Zheng Shu Xian , Li Jia
Published: June 2012

The relationship between the porosity and the mechanical property was still a bottle-neck in bone tissue engineering scaffold. Porosity increasing may reduce the scaffold strength. In order to solve the contradiction, the idea of enhancing the mechanical properties by controlling the scaffold porosity was proposed in this paper. Using reverse engineering technology, 5 different porosity cranium scaffolds were first established. Their FE models were built through FE surface preprocessing and volume fitted meshing. According to results of static analysis, the displacements and stresses of the 5 porosity scaffolds were compared and discussed and it indicated that the 36% porosity bionic scaffold have good porous level and mechanical properties.
Finite Element Analysis of ZY18000/32/70D Hydraulic Support Double Telescopic Mast
Authors: Liu Jian Ying , Bai Ling
Published: June 2012

This paper mainly solved the 3D modeling and force analysis of double telescopic mast about the real structure of ZY18000/32/70D hydraulic support. According to the GB of mast standard, computer simulation was manipulated for double telescopic mast about ZY18000/32/70D hydraulic support by not only 1.5 times rated axis load strength analysis but also 1.1 times rated load and eccentric 30mm buckling analysis. Through analysis and simulation tests，not only the distribution and deformation of the double telescopic mast about ZY18000/32/70D hydraulic support but also the stress distribution and simulation conditions were got about mast. Thus, theoretical basis could be provided for the design of double telescopic mast about ZY18000/32/70D hydraulic support.
Finite Element Modal Analysis of Frame of Vertical Type High-Pressure Grouting Machine Based on ANSYS
Authors: Huang Zhi Cheng , Li Ze Lun
Published: June 2012

The frame of 4MPa vertical type high-pressure grouting machine is used as the research object. The finite element analysis software ANSYS is applied to the modal finite element analysis of the frame. The first five order natural frequencies and the corresponding vibration modes of the frame are obtained, and then the influence of every mode shape on the performances of the frame was discussed. It provides a reference for the dynamic structural design and optimization of the frame of vertical type high-pressure grouting machine.
Flow Field Analysis and Numerical Simulation for Dynamic Filtration with Rotating Disks
Authors: Liu Zhong Bin , Luo Feng
Published: June 2012

Dynamic filtration with rotating disks is modeled by three-dimensional graphics software and its flow field is analyzed and numerical simulated by CFD software. The mechanical stability of dynamic filtration with rotating disks in the work process is analyzed by the model of rotating flow. The results show that the farthest end of rotating disks exit the largest flow velocity. There are two circular flows, which can remove the pollutants of rotating disks. The pressure of water is gradually increased as the main flow is near cylinder of the filtration. Simulation results are consistent to the practice, which provides important theoretical basis for improving and optimization of dynamic filtration with rotating disks.
Fracture Failure Analysis of 127mmG105 Drill Pipe
Authors: Li Fang Po , Zhang Shu Mao , Liu Yong Gang , Xu Xin
Published: June 2012

The failure cause of one Φ127mm G105 drill pipe was investigated through mechanical properties testing, optical morphologies and fracture analysis. The results show that drill pipe’s failure reason is the "martensite" white bright layer in its out-surface caused by intense friction in drilling process. Under the effect of torque and tensile loads, lots of cracks initiated in the white bright layer and developed along the vertical. In the end, when its tensile capacity was less than the weight of drilling string, drill pipe fractured along the horizontal. In addition, H2S in the travelling environment promoted crack’s initiation and development.
Influence of Humidity on Burning Perfectibility of Winding Combustible Cartridge Case
Authors: Lu Gui E , Jia Hao Nan , Jiang Jin Yong , Jia Xiao Biao
Published: June 2012

Studied the hygroscopic properties of winding combustible cartridge case by weighing method. Investigated residue formation of cylinder materials with different water contents by nitrogen-bomb tests. The results show that the higher the relative humidity is, the greater the equilibrium moisture content of the inside-wall material is. When the relative humidity was about 90%, its absorption rate was about 4.3%. Compared with its outside wall, the inner parts have much stronger moisture absorption properties. And the gross of combustion remains reached to the minimum when the relative humidity was about 60%.
Modal Analysis of Eccentric Rotor for Multi-Layer Leather High-Speed Cutting Machine Based on Bond Graph Method
Authors: Zhao Yan Wei , Li Jun Wei , Wang Huan , Yu Zhi Sheng
Published: June 2012

The stability problem of eccentric rotor in high-speed cutting process is the main factor affecting the performance of cutter transmission system. A modal analysis of eccentric rotor for multi-layer leather high-speed cutting machine based on bond graph method is proposed to obtain the complete modal parameters. The lateral vibration mathematical model of the eccentric rotor is build using bond graph theory. The inherent frequency, deformation modal vibration shape, and velocity modal vibration shape of eccentric rotor are obtained through the Matlab numerical calculation. Then the modal test for eccentric rotor is done and the compared results are given. The results show that using the bond graph method solves the problem more easily than Newton's theory, obtains the two type of modal vibration shape, and its relative error is less than 0.4%. The complete modal information is given that provides a theoretical basis to better understanding the dynamic properties of eccentric rotor and provides the basic parameters for dynamic performance optimization and dynamic balancing analysis of cutter transmission system.
Multi-Objective Design Optimization of Cooling Turbine Blade Based on Kriging Model
Authors: Ao Liang Bo , Li Lei , Li Yuan Sheng , Wen Zhi Xun , Yue Zhu Feng
Published: June 2012

The multi-objective design optimization of cooling turbine blade is studied using Kriging model. The optimization model is created, with the diameter of pin fin at the trailing edge of cooling turbine blade and the location, width, height of rib as design variable, the blade body temperature, flow resistance loss and aerodynamic efficiency as optimization object. The sample points are selected using Latin hypercube sampling technique, and the approximate model is created using Kriging method, the set of Pareto-optimal solutions of optimization objects is obtained by the multi-object optimization model using elitist non-dominated sorting genetic algorithm (NSGA-Ⅱ) based on the approximate model. The result shows that the conflict among all optimization objects is solved effectively and the feasibility of the optimization method is improved.
Numerical Simulation and Optimization of Cooling Ducts Layout in Hot Stamping Die
Authors: Xie Hui , Chen Ya Ke
Published: June 2012

Abstract. As an innovative process of manufacturing ultra high strength steel (UHSS), hot stamping or press hardening is a multi-physical coupling process with complex changes in thermal, mechanical and phase transformation. In this work, in order to study heat transfer from workpiece to upper & lower die and cooling water, a new approach, named Bulk Flow, is adopted to model the cooling ducts and to simulate heat transfer in hot stamping die. Not only can tool design, cooling duct layout and process parameters be studied and optimized to increase the cooling rate and to homogenize temperature distribution in workpiece, but also, the precision of hot stamping simulation be improved. The experimental results of boron steel components formed by the designed die show that the martensite is homogenous. It indicates the feasibility of the bulk flow method．
Numerical Simulation of Flow Field and Separation Efficiency of Inclined Cut-In Double-Inlet Cyclone
Authors: Wu Cai Jin , Ma Zheng Fei , Yang Yong
Published: June 2012

The three-dimension flow field and the separation efficiency of the inclined cut-in double-inlet cyclone were simulated numerically with Reynolds Stress Model (RSM). Numerical results show that the flow field nonsymmetry is improved in the inclined cut-in double-inlet cyclone and the swirl in the flow field was decreased greatly compared to that in the single-inlet cyclone. With the increase of inclined angle, both the tangential velocity and the axial velocity first increase and then decrease, reaching a peak at inclined 12 ° angle and at inclined 10 ° angle, respectively. The pressure drop in the inclined cut-in double-inlet cyclone increases first and then decreases with the increase of inclined angle, reaching a maximum far lower than that in the single-inlet cyclone, while the change of the radial velocity is not obvious. The separation efficiency of the inclined cut-in double-inlet cyclone could be effectively improved and the optimum inclined angle is 10 °.