bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigating the use of Nanoscale Bilayers Assembly on Stainless Steel Plate to Improve Evaporation
Authors: Wu Shen Chun , Wang Dawn , Li Hsih Shing , Lin Sin Jie , Hsu Chao Tsai , Chen Yau Ming
Published: September 2013

This study investigated the use of nanoscale bilayers assembly film for hydrophilic surface modification on stainless steel plates and observed its effects on the evaporation of acetone and ethanol on the plates. This study first established the nanoscale bilayers assembly technique, and then performed hydrophilic surface modification on stainless steel plates by changing the surface structure, producing different contact angles. The relationship between the number of bilayers (10, 20, and 30) and the resulting contact angle was empirically determined; results indicated that 20-bilayer modification yielded the best result, reducing the contact angle from 70° (unmodified surface) to 12°. Beyond 20 bilayers, at 30 bilayers, the samples show no significant changes or improvements to contact angle or hydrophilicity. Results from evaporation time tests showed that, compared to the evaporation time of ethanol and acetone on unmodified flat stainless steel surface, this decreased contact angle can improve the evaporation time by 100%, clearly indicating that hydrophilic surface modifications causes significant improvement in evaporation.
The Experimental Study on Paint Removal from Aluminum Surface Using Ice Jet
Authors: Li De Yu , Duan Xiong , Dong Xing
Published: September 2013

Ice jet technology shows a promising prospect of application in surface cleaning and de-painting engineering because of its environmentally friendly feature. The main objective of this work is to present a deeply experimental study on the organic paint removal from aluminum alloy 2A12 substrates and the surface damage development using ice jets. The effects of ice blasting pressure and blasting time on de-painting and damage to the substrate were mainly concerned. It was shown that at blasting pressure of 0.2MPa, organic paint coatings were stripped from the 2A12 substrates. The paint coatings, moreover, were removed more effectively with increasing blasting pressure. Little changes of the roughness of the blasted substrate surface were observed. SEM images showed little plastic deformation at the blasting pressure of 0.5MPa existed on the surface. Whereas, a few of impact craters due to impact of high-velocity ice particles appeared at 0.7MPa for 7 seconds of exposure time with its number increasing obviously for 15seconds.
Preparing the Coating of Color Ink-Jet Paper and Investigating its Printing Quality
Authors: Yang Yong Gang , Liu Fu Ping , Lu Yang
Published: September 2013

In order to know the coating effect and application of color ink-jet paper, the coating formula and printing quality of ink-jet paper were deeply studied. First of all, the coating liquid was prepared by dispersing and mixing the nanometer pigment, the adhesive and the other additives. Then the properties of ink-jet paper were tested and their surface profiles were characterized and evaluated with scanning electron microscope. Finally, the coating paper samples and the base papers were all printed with color ink-jet printer and measured with a spectrodensitometer. The study result showed that it can gain well coating and printing quality when the ratio of SiO2 and TiO2 is 3:1 and the content of PVA adhesive is 50%, especially paper whiteness is obviously higher than that before the coating.
Investigation of Microstructure and Properties of Surface Nanocrystallization Layer by Rolling Technology
Authors: Song Ming Fu , Liu Gui Min , Cai Zhi Hai , Zhao Jun Jun
Published: September 2013

This article will introduce a new type of surface nanotechnology, that is the Surface Nanocrystallization technology by pre-forcing rolling. A nanocrystalline surface layer was fabricated on deposited layer by using pre-forceing rolling technology (PFRT) .The microstructure of treated specimens was characterized by using scanning electron microscopy and transmission electron microscopy. Experimental evidence showed, The technology can form a smooth surface on the parts, so it can be used as the last process of the machining. The equipment has a simple structure, similar to ordinary lathe tool, so can be used in the ordinary lathe or the machining center. Experimental analysis indicated the coars crystal in the surface layer could be refined into nanocrystalline by using the pre-forceing rolling technology, attaining optimizing surface structure of metal parts.
The Crystal Orientation of Hydroxyapatite Coatings Affected by the Magnetic Fields on Magnesium Alloy
Authors: Xu Chen Yang , Xu Xiao Ling , Gao Fang , Chu Fu Xiang , Wang Qi , Guo Qian Nan
Published: September 2013

Hydroxyapatite coatings with biological activity on magnesium alloy can effectively reduce its degradation rate in the physiological environment. Pre-calcification was applied as the pretreatment in this paper. And then, hydroxyapatite coatings were deposited on the surface of the magnesium alloy in non-magnetic field, near the antarctic and the arctic of a constant magnetic field respectively. The morphology, phase composition and crystal structure of the coatings were analyzed using SEM and XRD. The results show that the crystals of the coatings affected by the magnetic fields are preferential orientation significantly.
Preparation and Properties of Photocatalysed Waterborne Styrene-Acrylic Coating
Authors: Zhang Peng Fei , Huo Li , Wang Ya Ru
Published: September 2013

The photocatalytic waterborne styrene-acrylic coating was prepared by adding different concentrations of homemade TiO2 transparent emulsion and nanometer TiO2 powders into styrene-acrylic emulsion. The adhesion, elastic, hardness, impact resistant properties of the film were measured and photocatalytic properties of the film were investigated through the degree of degradation of Rodamine B. The results showed that the photocatalytic properties of coating with homemade TiO2 transparent emulsion were better than that of nanometer TiO2 powders, and it does not affect the mechanical properties of the coating.
Comparing of Temperatures of Rolling Bearing under the Oil-Air Lubrication to the Spray Lubrication
Authors: Sun Qi Guo , Wang Yue Fei , Wang Ying , Lv Hong Bo
Published: September 2013

The heat generating mechanism inside the cavity of rolling bearing is analyzed and the convective heat transfer coefficient of bearing raceway surface in different rotational speed is calculated under the oil-air lubrication and the spray lubrication in this paper. The fluid domain geometry model of deep groove ball bearing SKF6208 is established, employing the flow field module in Workbench. The comparing simulations of the temperatures of rolling bearing cavity under the oil-air lubrication to the spray lubrication are done in different rotational speed. The simulation results show that the highest temperature of bearing cavity with the oil-air lubrication is almost the same to the spray lubrication when the bearing rotational speed is lower, and the highest temperature of bearing cavity with the oil-air lubrication is far lower than the spray lubrication when the bearing rotational speed is higher. Those conclusions verify the advantages of the oil-air lubrication in high rotational speed.
Failure Analysis of Tower Axle in the Wet Drawing Machine
Authors: Xu Yang , Song Ren Bo , Jia Yi Su , Li Guo Fu , Huang Shuai
Published: September 2013

The paper presents a failure analysis of tower axle in the water tank wire drawing machine. Material of the tower axle is 40Cr steel. In order to analyze the failure reasons of tower axle in the water tank wire drawing machine, we take experimental means such as morphological analysis, mechanical property testing, micro-metallography and scanning electron microscopy (SEM) of fracture observation, etc. The results show that the fracture of tower axle belongs to brittle fracture. The content of inclusions is more, and the composition is complex in the material. The heat treatment technology is improper. Improper quenched and tempered processing technologies cause more reticular and blocky ferrite in the steel. These are the main reasons for fracture of the tower axle.
Effect of Powder Pretreatment on the Wear of Ultrafine Cemented Carbide Cutting Inserts
Authors: Cheng Jian Bing , Pang Si Qin , Wang Xi Bin , Yu Qi Xun
Published: September 2013

Ultrafine WC-Co cemented carbide cutting inserts were prepared by direct low pressure sintering and low pressure sintering after the powder pretreatment, tool life tests of continuous cutting superalloy GH2132 were carried out, respectively. ZEISS continuous zoom stereo microscope and microphotograph system were used to observe flank surface wear morphology of the cutting inserts, and analysis the topography and elements of central wear region of flank surface by X-ray energy dispersive spectrometry and scanning electron microscope. The results show that the main wear mechanism of ultrafine cemented carbide cutting inserts is adhesive wear, and the wear resistance of ultrafine cemented carbide cutting inserts that low pressure sintering after powder pretreatment is superior to direct sintering, powder pretreatment helps increase the resistance of abrasive wear, adhesive wear and oxidative wear as well as diffusive wear of cutting inserts.
Method to Obtain the Regular Term in Bonded Dissimilar Materials under Thermal Loading
Authors: Gu Zhi Xu , Zheng Jian , Peng Wei , Tang Xi Nan
Published: September 2013

The stresses near the free edge of the interface of a joint of dissimilar materials after a change of the temperature can be described as the sum of one or two singular terms and a regular term which is independent of the distance and the geometry angles and . The regular stress terms are important for the stress distribution near the singular point. The emphasis in this paper is placed on giving an explicit form of the regular term by using a concept of equivalent edge load.
Investigation of Deformation and Damage of Taylor Impact Test
Authors: Li Ying , Wang Yu , Li Xiao Bin , Zhang Wei
Published: September 2013

Taylor impact tests are used as experimental and numerical tests for determining the mechanical behavior of materials subjected to high strain rates. Taylor impact tests are numerically simulated in the velocity range from 150m/s to 250m/s. Deformations of different impact velocity; impact damages of the axis centre; and the reasons of impact damage are discussed in the numerical simulation of Taylor impact test.
Calculation of Static Stiffness of Hyperelastic Coating
Authors: Zhu Hai Qing , Zhang Xie Dong
Published: September 2013

The fundamental theory about the constitutive relationship of hyperelastic model has been introduced and the model of super-elastic coating has been simulated in this paper. The static stiffness of different coating thickness has been calculated considering the hyperelasticy and viscoelasticity. Through the studying, because of the increasing of deformation, the compression static stiffness of the hyperelastic coating will be increased; while the tension static stiffness of the hyperelastic coating will be decreased. Moreover, the static stiffness is only related to the relative deformation not the absolute deformation.
Microstructural Characteristics and Wear Properties of NiCr/Cr3C2-WS2 Self-Lubricant Wear-Resistant Composite Coating on Ti6Al4V by Laser Cladding
Authors: Fan Hong Mei , Liu Hai Qing , Ren Jia , Meng Xiang Jun , Liu Xiu Bo
Published: September 2013

The self-lubricant wear-resistant NiCr/Cr3C2-10%WS2 coating and wear-resistant NiCr/Cr3C2 coating were obtained on Ti6Al4V by laser cladding. Microstructure of the coatings was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and X-ray energy dispersive spectrometer (EDS). The wear properties were evaluated using a ball-on-disc wear tester under dry sliding condition. The results show that the laser cladding NiCr/Cr3C2-10%WS2 composite coating has good friction-reducing and anti-wear capabilities at ambient.
Research on Ceramic of Water-Based Component
Authors: Wang Juan , Wu Zhang Yong , Wang Xian , Mo Zi Yong
Published: September 2013

That the key components of Water-based hydraulic components are easy to wear down in the course causes sealing performance degradation and then arises leakage, which affects water-based component life and hydraulic system operational reliability. Considering the characteristics of ceramic materials, the ceramic method is applied to improve the key parts of water-based component, and then wear and failure mechanism analysis was done on ceramic water-based component.
The Electromagnetic Interference Shielding Effectiveness of Carbonized Bacterial Cellulose Coated with Nickel by Electroless Plating
Authors: Zhu Pei , Dai Bo , Ren Yong , Xu Liu Yang
Published: September 2013

In this study, electroless plating technology is applied to coat the surface of carbonized bacterial cellulose with Ni. The fiber surfaces and mechanical interfacial properties of these composites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), scanning electron microscopy (SEM) and a vector network analyzer. Our experimental results show that the carbonized bacterial cellulose with nickel exhibit remarkably improved electromagnetic interference shielding compared to the pristine carbonized bacterial cellulose. The enhanced shielding ability arises from the electrical conductivities of the nickel and carbon.
Analysis of Heat Treatment Quality of a Spring Clip with Failure
Authors: Zhu Mei Hua , Lu Jia Wei , Xi Ying , Zhang Jin Sen , Chen Zhe
Published: September 2013

The fastening is an important part for fastening when laying the rails, which requires sufficient fastening pressure, strength, and durability. This article focuses on the fatigue fracture of the spring clip of a fastening and gets a result that the fracture accounts for alternating twist-bend load by examining macro-fracture. The crack origin is on the surface of the clip where significant decarburization and corrosion exists and its extension makes the clip break by examining metallographic structure and testing micro-hardness. The solution is to improve the heat treatment method and the surface quality avoiding corrosion.
Numerical and Experimental Studies of Composites Sandwich Structure with a Rectangular Cut-Out
Authors: Zhang Zhen , Zhang Jian Guang , Liu Xiu Zhi , Wen Yong Hai , Gong Shao Bo
Published: September 2013

Numerical and experimental study on honeycomb sandwich structure with a rectangular cut-out were carried out in this paper. Two designs were presented, with using a U-shaped sandwich structure or a combination of two separate sandwiches. Finite element models were developed and calculated using MSC.NASTRAN code by means of linear analysis and non-linear incremental deformation analysis. Compared with linear analysis, non-linear analysis was more suitable to evaluate the ability of sandwich structure with cut-out to resist compressive load. The results obtained from non-linear solution were verified by the supporting mechanical tests.
Hot Stamping of Two Different High Strength Steel with Tailored Properties
Authors: Wang Zi Jian , Xu Ya , He Wen Ting , Zhang Yi Sheng
Published: September 2013

With the increasingly widespread application of high-strength steel (HSS), tailored properties, namely different mechanical properties required in different regions of the same part, have been proposed, in order to achieve the matching between mechanical properties and safety performance of motor vehicle parts. In this paper, the influence of air gap on the final hardness and strength distribution is discussed in terms of two different HSS, namely LG1500HS and WHT1500HF. As for steel LG1500HS, regardless of the location of samples in the formed part, the final fracture area is in the vicinity of the air gap center, proving the lowest hardness and strength in transition zones. Compared to steel LG1500HS, steel WHT1500HF exhibits gradient hardness distribution from the cooling zone to the heating zone, with no minimal value discovered in transition zones.
Study on Influences Mold Shape Imposes on Bread Heating Distribution
Authors: Chen Ze Hua , Gao Shao Bo , Yang Shang Xin , Zhang Hai Yang
Published: September 2013

A 3D numerical model for heating distribution of bread mold in the oven is presented in this study. In the process of bread production, heat effect is influenced by the shape of the mold. Being consistent with the results of calculation, the shape of the mold imposes great influence on the heating distribution uniformity and maximum temperature difference. Because of even boundary curvature, circular mold behaves better than elliptical and rectangular mold. By utilizing the introduced theoretical model, we are able to get the spatial heating distribution of all kinds of mold. And taking three kinds of mold as example, we illustrate that the more uneven the boundary curvature is, the less uniform the heating distribution will be.
Hot Processing Maps and Workability Characteristics of As-Cast 42CrMo Steel during Hot Compression
Authors: Qin Fang Cheng , Li Yong Tang , Qi Hui Ping , Du Shi Wen
Published: September 2013

In order to investigate the thermal forming behavior of as-cast 42CrMo steel, the isothermal compression tests were performed on a Gleeble-1500D thermal mechanical simulator in the deformation temperature ranging from 850 to 1150°C with an interval of 100°C, the strain rate ranging from 0.05 to 5s-1 and the height reduction of 60%. On the basis of the flow stress data, dynamic materials model (DMM) and Prasad's instability criterion, the processing maps for as-cast 42CrMo steel were constructed at the strains of 0.4 and 0.6. The safe and unsafe areas and the corresponding deformation regimes were predicted during hot working, which are verified through the microstructure observation. The results indicate that the safe zones in the temperature range of 850~1150°C and strain rate of 0.05~0.35s-1, which exhibit the dynamic recovery and recrystallization. However, the flow instability domains are in the domain of deformation temperatures 850~1150°C and strain rate higher than 0.35s-1. Typical microstructure of instability is cracking, which should be avoided so as to obtain desired mechanical properties in hot processing. Finally, the forging parameters were predicted and optimized accurately by the processing maps, the temperature range of 1050~1150°C and strain rate of 0.05~0.1s-1 were recommended as the optimum deformation conditions for hot processing of as-cast 42CrMo steel.
Design an Effective Solution for Stretch Forming of Sheet Metal with a Shorter Free Edge
Authors: Han Qi Gang , Zhang Qiang , Li Ming Zhe , Su Shi Zhong , Yang Wen Ke , Ban Qing Chu , Yan Ni
Published: September 2013

To remove the disadvantage of conventional stretch forming machine (CSFM), a flexible stretch forming machine (FSFM) has been developed by authors recently. Based on finite element simulation and experiments, the advantages of FSFM have been detailed discussed. Our results indicated that the discrete multi-gripping jaws can swing and rotate in any direction automatically, which can solve the wasteful production of CSFM by increase the rate of materials utilization and close-fitting dies. Furthermore, the value of springback and thickness gradient in the parts formed by discrete multi-gripping jaws is smaller compare with that of integrally gripping jaws, which can help to achieve a high quality of stretch forming parts. A series of double-curved sheet panels have been formed by FSFM easily and used in the cabinet covers of high-speed train and the Dongdaemun Design Park building successfully. This work has a strong value in enhance the way to flexible and reproducible stretch forming technology.
The Design of a Five-Axis Machine for Water Jet Incremental Sheet Metal Forming
Authors: Lu Hai Long , He Kai , Li Jiu Hua , Wei Shu Guo , Du Ruxu
Published: September 2013

Water jet incremental sheet metal forming is the leading research topic in sheet metal forming industry, recently. In this work, a five-axis machine for water jet incremental sheet metal forming is designed and built, which is made up of four parts, namely linear motion unit, nozzle tilt and rotation unit, fixture and seal chamber. The nozzle tilt and rotation unit has two rotation degrees of freedom and the linear motion unit has three translational degrees of freedom. Then, two types of nozzles including L type nozzle and upright nozzle are designed and built. Finally, two different kinds of fixture are designed and built for common sheet metal forming and bellows expansion joints forming, respectively.
Finite Element Simulation of Four-Way Tube Hydroforming
Authors: Wang Shi Gang , Yang Hong Shuo , Pan Yong Ge
Published: September 2013

The procing craft which make cross pipe by hydroforming is recommend. It created finite element model by DYNAFORM and simulated the process of hydroforming four-way tube. Forming result and influencing factor of different loading path is compared and analyzed. As a result, loading path has a great impact on the forming quality of four-way tube.
Stable Electrophosphorescent Emission of Fluorenyltrifluoromethyl-Pyridine Iridium 2-Picolinic Acid at High Concentration
Authors: Zhang Wen Guan , Shao Xiao Lan , Xie Xue Zhen , Zhao Sheng Min
Published: September 2013

Emission spectrum of bis [2-(9, 9-diethylfluoren-2-yl)-5-trifluoromethylpyridinto-C3, iridium (2-picolinic acid) (fl-5CF3-py)2Ir (pic) in THF was 572 nm. Two weak UV absorption bands can be assigned to spin-allowed singlet metal-to-ligand charge transfer (1MLCT) and spin-forbidden 3MLCT transitions. The organic light-emitting devices A ITO/PEDOT: PSS/PBD: PVK: (fl-5CF3- py)2Ir (pic) (12 %) /LiF/Al, B ITO/PEDOT:PSS/PBD: PVK: (fl-5CF3-py)2Ir (pic) (2 %) /TPBi/LiF/Al and C ITO/PEDOT:PSS/PBD: PVK: (fl-5CF3-py)2Ir (pic) (12 %) /TPBi/LiF/Al were fabricated using iridium complex as emitter dopant with electroluminescent spectra at 576, 572 and 576 nm, respectively. Devices A, B and C exhibited maximum luminance of 983 cd/m2 (at 10 V), 3132 cd/m2 (18 V) and 9876 cd/m2 (12V), respectively. Device C exhibited more efficient emission. The devices had excellent stability even at the high concentration.
Comparative Analysis of Onestep and Multistep Forming in Automotive I/P Beam Hydroforming Process
Authors: Wang Xue Yi , Zheng Zai Xiang , Shen Hui , Zhang Wei Wei
Published: September 2013

After a brief introduction of state of art of hydraulic forming technology in China and abroad, the simulation experiment and finite element model of the directly forming and step-by-step forming are designed. According to the different characteristics of forming and spring back, the simulation analysis are performed through dynamic display algorithm and statistic implicit algorithm, and analyze the influence on tube thickness, spring back amount and the final residual stress of two different manufacturing processes which is compared with the experimental result. The comparison result can provide some theoretical reference for dashboard beam hydraulic forming process design, process parameter setting and mold design.
Experimental Research and Numerical Simulation Analysis for Hydroforming of an Instrument Panel Beam
Authors: Wang Xue Yi , Zheng Zai Xiang , Wang Wen Shan , Zhang Wei Wei
Published: September 2013

Due to the apparent advantages of tube hydroforming technology in reducing weight and energy consumption, and saving material and cost, it has been applied in the production of instrument panel beam. By constructing the FEM models of instrument panel beam, three numerical simulation schemes are designed according to the matching relationship between internal pressure load and axial feeding. Then the simulation results are given and compared with the experimental data. The simulation and experimental analysis indicate that the optimal matching relationship between internal pressure load and axial feeding influences hydroforming result of parts. It provides a theoretical reference for the design of hydroforming process and its die, and the setting of critical process parameters.
Study on an Ultra-Precision Plane Magnetic Abrasive Finishing Process by Use of Alternating Magnetic Field
Authors: Wu Jin Zhong , Zou Yan Hua
Published: September 2013

In this paper, a new plane magnetic abrasive finishing process by using alternating magnetic field is proposed to improve the efficiency and surface precision. In alternating magnetic field, the forced direction of magnetic particles is changing. Therefore, magnetic particles could produce the up and down movement, which promote the scatter of magnetic particles , improve the roll of abrasive particles and enhance the utilization of abrasive. In order to know well the magnetic intensity distribution in processing area, measured the magnetic flux density. Finishing force is important to understand the mechanism of material removal, investigated to the finishing force and contrasted to the movement changes of magnetic particles in water-soluble finishing fluid and oily finishing fluid. A set of experimental devices have been designed to realize surface polishing on C2801 brass plate, the results proved the feasibility of this method, which can improve the workpiece surface quality.
Experimental Study on Surface Roughness in Quick-Point Grinding Engineering Ceramics
Authors: Ma Lian Jie , Gong Ya Dong , Bao Yuan Ji
Published: September 2013

Through grinding experiment on mica glass ceramic, the mechanism of material removal was analysed, the fracture and removal of engineering ceramics was suitable for Griffiths fracture strength theory. And the factors of affected surface roughness were studied. The results indicated, The surface roughness was significantly affected by the grinding depth, inclining angle and deflecting angle in quick-point grinding engineer ceramics. The surface roughness value decreased with increasing of the wheel velocity, increased with increasing of the workpiece feed, decreased with increasing of grinding depth, increased with increasing of grinding wheel inclining angle and decreased with increasing of grinding wheel deflecting angle.
Enhanced Two-Point Exponential Approximation for Structural Optimization
Authors: Chung Tien Tung , Jiang Qi Hong , Zhu Jia Rong
Published: September 2013

This paper proposes a new approximation method called Enhanced Two-Point Exponential Approximation (ETPEA), which is derived based on Two-Point Exponential Approximation (TPEA). In TPEA, when the exponents of intervening variables cannot be calculated by fitting the sensitivities of the previous design point, the accuracy of TPEA is decreased. In such cases, ETPEA uses a substitution function to construct the approximate function, and the optimum result can be improved. Some typical structural optimization problems are tested, and the results indicate that the optimum design can be found accurately and quickly with the new approximation method. It is verified that the new approximation method is also efficient for large structural optimization problems.
Aspects of Design and Manufacture of a Three-Dimensional Fibre Optic Laser Doppler Probe Head
Authors: Ahmed Noor A.
Published: September 2013

Laser Doppler Velocimetry is an important flow diagnostic methodology used in modern day fluid flow investigations. The present paper describes the design and manufacturing aspects of a novel fibre optic LASER Doppler probe head intended for three dimensional measurements in a complex flow field. The paper particularly concentrates on the tight tolerances required of the various components associated with the probe head to achieve the desired measurement volume. Keywords: Fibre Optic, Laser Doppler, Velocimetry, three-dimensional, complex flow field
Optimal Design of CNC Crushing Machine Steady Based on Genetic Algorithm
Authors: Zhang De Xin , Han Ming Jian , Ou Yang Jie , Wang Guo Qing , Hao Guo Qing , Huang Jin Fu
Published: September 2013

The Genetic Algorithms In engineering structure optimization design includes Truss Structure optimization, Shape and topology optimization, Composite materials optimization, layout optimization, Multi-Objective Optimization. This paper combined with engineering background , Selecting the Pressing gear of CNC crushing Machine Steady as starting point for Optimization modeling .Analyzing the simple conditions theoretical physical model of CNC Crushing Machine Steady, Reasonably selected design variables ,using Conventional Methods and genetic algorithms to optimize the Steady ,obtainning every iterative step relevant data under the two methods, and analyzing the results ,analysis the accuracy of the optimize results through the stress and displacement map .
Application of an Improved Internal Model Controller Based on the Particle Swarm Optimization in Network Control System
Authors: Chen Wei , Wang Wen Bin , Zhao Zhi Kai , Yan Zhi Yuan
Published: September 2013

Internal Model Control (IMC) is widely used in Network Control System (NCS) with its strong robustness and simple parameter adjustment. But the accurate dynamic inversion of the IMC model is not easy to find out. To solve this problem, an improved Internal Model Controller is designed with a PID controller and feedback loop, then the Particle Swarm Optimization (PSO) is used to optimize all the parameters of the improved controller. At last, simulation results show that the improved Internal Model Controller can maintain the system stability and the performance of the step response is extremely great in terms of rapidity and anti-interference ability, compared with the classic internal model controller, which enables NCS to achieve a better control effect.
Testing System of Needle Selectors for Jacquard Knitting Machines
Authors: Ma Jie , Zha Xiao Feng , Tao Hai Bin , Ni Jun Fang
Published: September 2013

Based on piezoelectric theory of computer jacquard circular knitting machines, the needle selectors are analyzed under various complicated working conditions. According to characteristics of the inverse piezoelectric effect, the control system for needle mechanisms is designed and the driving program is implemented by C language, which is used to test the functions of needle mechanisms.
Study of Topology and Control Strategy of the Novel Bi-Directional Lithium Battery Charger
Authors: Chen Xi Kun , Zhu Hui Feng
Published: September 2013

With the development of clean energy, lithium battery is paid more and more attention because of its outstanding energy storage characteristics .So the novel bi-directional lithium battery charger topology is presented in this paper and operating theory is analyzed clearly. It can make the energy bi-directional flow between the power grid and battery as needed. And it can also fully adapt to the lithium battery charging and discharging characteristics. Based on phase shifting control, the output voltage ripple and the inductor current ripple can be reduced in the condition of the same input and output, and the DC bus voltage can also be improved. This bi-directional lithium battery charger topology can be widely used in battery energy storage system.
Drive Control of a Class of Scan Systems
Authors: Wang Cai Xia , Liu Ming Hua , Cai Ning
Published: September 2013

In order to meet the requirements of the degree of speed stability for scanning motion, a three-phase AC permanent magnet synchronous motor (PMSM) driven by sinusoidal wave was utilized as the actuator to design a drive control system for a class of scan systems. The main performance index，the degree of speed stability was introduced in brief. With the method of parameter matching, the design of rotating speed and torque, the system was realized. The structure and system components were designed. The simulation results show that the designed control system can achieve desired degree of stability and satisfy the performance specifications effectively and rapidly.
A Rapid Simulation and Optimization Study of Production Line
Authors: Ma Xiang Fei , Liang Di , Pan Yu Cheng , Wang Hua Dong
Published: September 2013

Based on intermittent production line balance problem, Minitab statistical tool is used for data random distribution fitting in this paper and the car body production line model of one company is established and simulated under Flexsim environment, which benefits the line imbalance problem to be found quickly and accurately. Designing optimal program based on project management network analysis and making simulation and evaluation, the productivity is improved effectively and the time to balance and optimize production line is shortened greatly.
Step Motor Control Based on FPGA
Authors: Zhu Juan , Chen Yue
Published: September 2013

Design a step motor control system based on Field Programmable Gate Array (FPGA). Give the hardware circuit of this system and the program based on very high speed integrated circuit hardware description language (VHDL). Compared to step motor control system based on single chip microcomputer, the processing speed of this system is faster.
Research on Fuzzy Control in Vacuum Heat Treatment Furnace Temperature Control System
Authors: Wang Xiao Yan , Zhou Zhi Wen
Published: September 2013

Vacuum heat treatment furnace temperature parameter is a large time delay, nonlinear,time-varying and complex control objects, Single-chip computer is used as the control core to achieve the temperature control through the fuzzy control algorithm, the hardware structure an software design process are given in this paper, the control precision, dynamic characteristics, and optimization of the performance are improved by this control system.
Optimization of the Hydraulic Control System Utilizing BP Neural Network Control Strategy Based on Genetic Algorithm
Authors: Feng Ying Ying , Hui Nan Mu , Luo Zong An , Zhang Dian Hua
Published: September 2013

For the characteristic of the MMS series Thermo-Mechanical Simulator hydraulic control system, using traditional PID control method can not achieve the desired control effect. Basing on genetic algorithm, BP neural network, which has the arbitrary non-linear approximation ability, self-learning ability and generalization ability, has been used into the hydraulic control system to achieve the online adjustment of the weighting coefficients and the adaptive adjustment of PID control parameters. The results of simulation and online tests show that the control effect of hydraulic system has been improved significantly, and the accurate control of hydraulic system hammer displacement has been realized.
Bearing Condition Recognition Based on Kernel Principal Component Analysis and Genetic Programming
Authors: Liu Wen Bin , He Yu Xin , Wang Hua Qing , Yang Jian Feng
Published: September 2013

In order to extract the fault feature validity in early fault diagnosis, method based on kernel principal component analysis and genetic programming (GP) is presented. The time domain features of the vibration signal are extracted and the initial symptom parameters (SP) are constructed. Then the combination to the initial SPs is carried on to optimize and build composite characteristics by GP. Through kernel principal component analysis (KPCA), the nonlinear principal component of the original characteristics is produced. Finally, the nonlinear principal components are selected as the feature subspace to classify the conditions of rolling bearing. Meanwhile, the within-class and among-class distance is introduced to compare and analyze the bearing condition recognition effect by using KPCA and GP plus KPCA separately. Experimental results show that the features extracted by kernel principal component analysis and genetic programming perform better ability in identifying the working states of the rolling bearing.
Adaptive Levitation Control Based on Feedback Linearization
Authors: Li Li Xin , Jin Zhong Qing
Published: September 2013

This study mainly addresses the adaptive control for the levitation system in presence of mass variation. Firstly, considering the nonlinear of levitation system, the feedback linearization is applied to achieve the global stabilization. Due to the additions of luggage and passengers, the variation of mass degrades the dynamic performance of levitation system, it is necessary to estimate and cancel the effect of mass variation. So an algorithm to estimate the mass of levitation system is proposed and integrated to adjust the parameters on line. The results of simulations show that excellent closed-loop performance is provided in the presence of mass variation.
The Study of Fuzzy Control Algorithm in a Duct Active Noise Control System
Authors: Meng Xian Jie , Wang Juan , Wang Yu Cheng
Published: September 2013

In this paper, the application of fuzzy control algorithm in duct active noise control technology was studied, according to the problem of secondary acoustical feedback existing in feedforward control structure (FCS) adaptive active noise control (AANC) system, a reverse control structure of fuzzy active noise control (FANC) system was established. Through Matlab software the fuzzy control algorithm was simulated, and the simulation results showed that it has a good convergence and stability in the FANC system.
Analysis of DAS and ATWS Mitigation System in Nuclear Power Plant
Authors: Yao Wan Ye , Bai Jin
Published: September 2013

As the backup systems of RPS (reactor protection system), Diverse Actuation System and ATWS( Anticipated transients without scram) mitigation system are diversely designed from RPS system so as to offer protection for the normal operation of nuclear power plant. Both of the systems bear the function of mitigating the anticipated transients without scram events. Being isolated from RPS system, the design of DAS and ATWS system meeting the requirement of diversity and influences of CCFs (common cause failure) are effectively prevented. This article mainly analyzed the structure and function of the two systems and the similarities and differences between them.
The Research of Permanent Magnet Synchronous Motor Predictive Current Control Algorithm
Authors: Lin Lian Dong , Ren Pei Jia
Published: September 2013

To enhance the current regulation capability for PMSM when transient state, which caused by the existence of numerical delay such as current sampling and Pulse-Width Modulation (PWM) duty-cycle updating, this paper proposed a predictive current control algorithm for permanent magnet synchronous motor which based on deadbeat control. The numerical delays in conventional FOC system are eliminated in theory. Simulation and experiment results show that the PMSM (Permanent Magnet Synchronous Motor) current predictive control scheme improves both the dynamic performance and steady-state precision of the PMSM control system.
Study on Mechanical Braking System Development Method and Validation for Electric Vehicles
Authors: Huang Xiao Ming , Ning Guo Bao
Published: September 2013

A set of mechanical braking system matching and development method for hybrid vehicles is established with the reference of mechanical braking system development method for traditional vehicles. The control strategy and development method, which based on braking force distribution between front and rear axle, enable the recycle of energy as well as good brake efficiency. Finally, the development methods, which based on brake efficiency and braking regulations, has been analyzed and verified through parameter model.
Modeling and Control with Hysteresis of Piezoelectric Smart Materials Actuators
Authors: Liu Yan Mei , Chen Zhen , Zhuang Xue Zheng , Liu Zhao Hui
Published: September 2013

Hysteresis hinders the effective use of piezoelectric smart materials in sensors and actuators. This paper proposes a hybrid model that can precisely portray hysteresis in piezoelectric actuators, which is constructed by a preisach operator with a piecewise uniform density function. Then, the corresponding inverse model for hysteresis is developed. It studies online recursive identification of hysteresis drift. Based on the obtained models, a method for simultaneous compensation of the hysteresis of piezoelectric actuator is applied to the control of system nonlinearities. Simulation and experimental results based on an IPMC actuator are provided to illustrate the proposed approach. The result verified the validity of the model and effectiveness of the controller.
An Energy-Saving Control System to Street Lamp Based on Sensor Networks
Authors: Li Xiao Guang , Xiao Ping Ping , Zhu Juan
Published: September 2013

For the problems that the street running state and information was difficult to feedback and reasonable control, we apply the topology model to the street lighting management system, and complete the optimization control in this paper. Using the fuzzy control theory to handle the road signals, the intelligent lighting region controller integrates the thyristor chopper with the autotransformer technology, carries out the soft start and slow slope control to the street light, and realizes automatic voltage and energy saving. At finally, the system can realize the energy-saving control and intelligent, networked management of city street lamp.
Design Higher Order Sliding Mode Controller for a Class of SISO Uncertain Nonlinear System
Authors: Liu Jin , Ding Gang , Zhao Zhan Shan
Published: September 2013

A higher order sliding mode control design is considered for a class of uncertain nonlinear systems with unknown bounded uncertainties. This method can be viewed as the finite time stabilization based on integral sliding mode control and geometric homogeneity. Based on the Lyapunov theory, the system trajectory is guaranteed to approach the sliding surface. Only one adaptive gain parameter is required. The stability and the robustness of the control system are proven. Numerical experiments illustrate the satisfactory performance of the proposed control methodology.
Design and Implementation of Fall Detection System Based on ZigBee
Authors: Zhang Yi , Tan Gang , Luo Yuan , Li Yang
Published: September 2013

Elderly people are unable to be rescued promptly when they fall down from the chair or bed, and may be injured seriously. A fall detection system for chair based on ZigBee was investigated in this paper for this problem. Gotten the fallen information by multi-sensor data acquisition and detection technology, uploaded to PC or Android terminals through ZigBee-WiFi gateway, and sent the information to mobile phone in SMS through GSM module. The adaptive weighted fusion algorithm was used to improve the accuracy of monitoring-data. The results show that one who take the system can get the alert message instantly by PC, Android terminals and mobile phones, so it has the potential to satisfy the application of the elderly peoples care problem.
The Research and Experimental Study of Fully Automatic CNC Grooving Machine
Authors: Yin Ming Fu , Song Chao
Published: September 2013

This article puts the automatic CNC grooving machine as the research object, which oriented by the enterprise's actual demands, and designs the product structure. Furthermore, the paper applies UG/NX 3d modeling and motion simulation to the product. Verify the machining accuracy through experimental study, on this basis, carry through commissioning and improvement to grooving machine, thus it is concluded that the design is feasible.
Steps and Stairs-Climbing Capability Analysis of Six-Tracks Robot with Four Swing Arms
Authors: Li Yun Wang , Ge Shi Rong , Wang Xue , Wang Hai Bin
Published: September 2013

In order to investigate the maximum stairs-climbing capability of the six-track robot with four swing arms and the centroid position control in the climbing process, firstly, the isolated steps and successive stairs in reality environments were simplified into a model that composed of horizontal planes and vertical planes; afterward, the robots centroid distribution was analyzed, the step-climbing methods and processes were given, and the relation equations of the step height, the arms swing angles and the main track evaluation angle were founded; Lastly, the conditions of the maximum step height and the conditions of climbing successive stairs using the slope-climbing method was deduced. Using the parameters of CUMT-III type coal mine exploring robot prototype, the relation curves of the step height and the robot elevation angle was drawn when the rear swing arms spread, and the 3D relation graphs of the robot elevation angle, rear arms swing angles and the step height were drawn, when the swing arms took some specific swing angles. The maximum theoretical step height of the prototype were obtained, which were compared with the test results in laboratory. This paper will provide theoretical basis for centroid position control in steps and stairs climbing process.
The Design of the Intelligent EOD Manipulator with Five DOF
Authors: Liang Dong Dong
Published: September 2013

A kind of intelligent EOD manipulator with five DOF has been designed against the EOD sites with the complicated cases and many obstacles unstructured. In this paper a general solution for the intelligent EOD manipulator with five DOF has been summarized, and a system analysis based on the following five parts has been performed further: Design for structure of the hand, design for structure of the wrist, design for structure of the arm, design for body of the manipulator, design for the hydraulic driving system. In view of the above, utilizing software such as CATIA and AUTOCAD, etc, a relative three-dimensional solid model has been modeled in the design to improve it in efficiency and quality, accordingly, and shorting development period for the intelligent EOD manipulator with five DOF.
Robotic Curve-Shaped Seam Tracking System Using Vision Sensor
Authors: Gao Feng Xin
Published: September 2013

This paper presents a vision-based curve-shaped seam tracking system. The measurement of the curve trajectory is based on a camera that is installed ahead of the end effector of the robot. Effective image processing method is designed to extract the feature points of the curve. Then a fuzzy controller is proposed to control the position of the robot to track the curve. To improve the performance of the controller, a self-tuning mechanism is added to the controller. Finally, experiments are fully conducted to verify the effectiveness of the proposed method.
True Color Image Enhanced by Wavelet Illumination-Reflection Model
Authors: Xiong Jie , Lu Lei
Published: September 2013

When a true color image is enhanced, the same hue should be kept and the useful details should be strengthened in the image enhanced. According to the imaging principle, wavelet illumination-reflection method is proposed. Firstly, true color image is transformed from RGB space to HSV space. Secondly, the saturation is attenuated by CLAHE. Thirdly, the value is decomposed into illumination and reflection by wavelet illumination-reflection model. The details of the reflection are strengthened. The dynamic range of the illumination is reduced in order to enhance the image. Experiments and analysis show that the enhancement algorithm based on wavelet illumination-reflection model is obviously better than multi-scales Retinexs with color restoration (MSRCR).
An Algorithm to Transform Tolerance-Control Solutions of Interval Linear Equations
Authors: Tian Li , Li Wei
Published: September 2013

Solutions to interval linear equations is a fundamental problem in interval analysis. Many different forms of solutions have been defined, but the relationship between various solutions are rarely discussed. In this paper, we propose an algorithm to change system parameters, which can make the tolerance-control solution to become a tolerance solution or control solution of the new system.