bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Double Motor DC Drive in the Crane Control System
Authors: Guo Shang Feng , Li Hong
Published: August 2013

Crane with its advantages is widely used in industrial and mining enterprises, but the old control system will bring a series of problems which increased the daily maintenance work. This article adopts the double machine automatic control system of dc drag, and position control method based on the standard stroke was designed, and its validity is verified by Matlab simulation.
Digital Analysis of Hydraulic Cone Valve Turbulence Based on Fluent 3D Solver
Authors: Ji Hong , Zhu Wei Guo , Chen Song , Zhao Jing
Published: August 2013

The hydraulic cone valve is an important basic component in Fluid drive and control technology. Characteristic of cone valve inner flow filed influences directly the valves performance. Especially when fluid flow in runner is turbulent, characteristics of flow field have great influence on the valves working performance.Main work of this paper is numerical calculation and simulation of cone valve inner runner flow field inside hydraulic hammer. First make a 3D modeling for cone valve using Pro/E, by fluent this paper analyses and discusses the distribution of hydraulic cone valve internal flow field including flow velocity field, pressure field and flow, etc when the cone valve core taper angle is 30°, the gap is 0.5 mm, and inlet velocity is different, analyses position and strength of the vortex, and finds out the main reason for energy consumption.The results of the study show that by the optimal design of the cone valve seat, the density degree of the flow and the size of the vortex is reduced, the energy loss is reduced, negative pressure zone also changes, the noise is reduced and the energy utilization is improved.
The Optimal Controlled Partitioning Strategy for Power System Based on Master-Slave Problem
Authors: Wang Wei , Yu Ting , Pu Tian Jiao , Tian Ai Zhong , Lin Ji Keng
Published: August 2013

Controlled partitioning strategy is one of the effective measures taken for the situation when system out-of-step occurs. The complete splitting model, mostly solved by approximate decomposition algorithms, is a large-scale nonlinear mixed integer programming problem. A new alternate optimization method based on master-slave problem to search for optimal splitting strategy is proposed hereby. The complete model was converted into master-slave problems based on CGKP (Connected Graph Constrained Knapsack Problem). The coupling between master problem and slave problem is achieved through load adjustment. A better splitting strategy can be obtained through the alternating iteration between the master problem and the salve problem. The results of the examples show that the method can obtain better splitting strategy with less shed load than other approximate algorithms, which verifies the feasibility and effectiveness of the new approach presented.
Experiment Research on Dynamic Characteristics of Ground Fissure Belt Loess in Xi 'an Area
Authors: Deng Ya Hong , Mu Huan Dong , Peng Jian Bing , Leng Yan Qiu , Sun Zhen Feng , Xue Jie
Published: August 2013

The Fenwei Basin can be the most developed area of ground fissures as well as the associated geo-hazard in China and even in the world .Considering the ground fissure disasters influence on site condition, especially on the dynamic characteristics and dynamic response of site soil, in this paper, under the condition of constant pressure consolidation, consolidated undrained dynamic triaxial tests are carried on Xi'an area ground fissures belt loess with different confining pressures and dynamical parameters are obtained. Based on the experimental results, the dynamic stress-strain relationship, the change laws of dynamic shear modulus and damping ratio are analyzed. The equivalent visco-elastic constitutive model is also established.
Research of Environmental Materials with Sewage Marine Discharge Diffusion Effect in YangKou Port
Authors: Yu Hang , Bai Jing Feng , Wang Xin Hai , Zhao Hong Xin
Published: August 2013

The sewage diffusion is an environmental material for protecting marine environment. It plays an important role in port engineering. Its effect under deep water was carried out between different diffuser design parameters based on the hydraulic model test, and YangKou sewage marine disposal project was taken as an example. For YangKou project, jet angle was controlled to be 0 degree, and horizontal angle was controlled to be 0 degree. It not only can ensure that sewage fully diluted mixed, also can avoid the premature convergence and sewage lifting. It is feasible for selecting large angle nozzle under deep water and there are some technical bases have been provided for other sewage marine disposal project.
Three Dimensional Dynamic Analyses on Stroller Wheel with Shock Absorber
Authors: Hsieh Yi Chern , Doan Minh Hai , Chang Chen Tai
Published: August 2013

We present the analyses of dynamics behaviors on a stroller wheel by three dimensional finite element method. The vibration of the wheel system causes by two different type barriers on the road as an experiment design to mimic the real road conditions. In addition to experiment analysis, we use two different packages to numerically simulate the wheel system dynamics activities. Some of the simulation results have good agreement with the experimental data in this research. Other interesting data will be measured and analyzed by us for future study and we will investigate them by using adaptive finite element method for increasing the precision of the computation results.
Experiment Research of Environment Effect on Mechanical Properties of PMMA
Authors: Wang Jia Ying , Zhang Jian Yu , Shi Xin Hong
Published: August 2013

Fatigue properties of the newly-formed and served canopy PMMA, which was applied in a certain airplane, were studied by experimental method. In order to gain the fatigue strength in the designated life, experiments based on up and down method had been conducted. The S-N curves of the PMMA were acquired based on three-parameter exponential function. Fatigue properties of the canopy PMMA in the two different condition of service were discussed. The results of analysis showed that fatigue properties of the served PMMA did not decrease significantly compared to the newly-formed PMMA.
Study on Direct Current Controlled Distribution Static Synchronous Compensator with Mechanical Properties Used for Improvement of Voltage Quality
Authors: Zhu Qun Feng , Huang Lei , Yang Deng Xiang , Zhu Guang Yao
Published: August 2013

A type of direct current controlled static reactive power compensator (DSTATCOM) used for improvement of voltage quality in low-medium distribution network is introduced. The main circuit of DSTATCOM consists of VSI-SPWM voltage source inverter. The extraction of reference current and the tracking control of compensator current are realized in synchronous reference frame. The function of DSTATCOM to mitigate voltage sag and flicker is presented in this paper and the control mode of DSTATCOM is discussed in detail. The function of DSTATCOM to mitigate voltage sag and flicker under different control mode is simulated with MATLAB. The simulation results shows that the current control mode is suitable for mitigating voltage flicker and the voltage control mode is suitable for mitigating voltage sag.
Comparative Analysis of Rotor Position Detection Technology in the SFC Soft Starting of Pump Storage Motor
Authors: Ji Lian Tao , Wang De Shun , Yang Bo , Li Guan Jun
Published: August 2013

Static Frequency Converter (SFC) is the key control device of reversible pump storage unit. By inputting a variable frequent current to the corresponding stator windings, the SFC can steadily start the synchronous motor. In this process, rotor position detecting accuracy comes to be the key point, but at the ultra-low speed period, the motors terminal voltage is too low to accurate sampling and is also vulnerable to the interference, which brings risks to the variable frequency starting. In this paper, two initial rotor position detection methods are compared, one is based on the voltage vector, and the other is based on adapt flux observer. At last, a 300MW/15.75kV pump storage unit with a 6 pulses SFC are built on the RTDS platform to exam the control strategy.
Design and Application of the Butt Auxiliary Device for the Erection of Steel Tower Using Helicopter
Authors: Xia Yong Jun , Miao Qian , Huang Ke Xin
Published: August 2013

The erection construction technology of steel tower of overhead transmission line using helicopter has higher requirements to the butt auxiliary device. According to the GE1 steel tower of the QingZang AC/DC interconnection project Geermu converter station earthling line, the butt auxiliary device is developed. The butt auxiliary device includes a guiding device, horizontal-direction caging device and vertical-direction caging device and solve the problems as follows limiting in air, docking, perching and temporary supporting. The successful engineering application show that the butt auxiliary device is safety and reliable and has perfect function, simple structure and convenient installing and removing. This provides reference for the design of the butt auxiliary device to other types steel tower of transmission line.
Preparation and Properties of Ni-TiB2-Gd2O3 Composite Coatings by Electrodepositon
Authors: Liu Xiao Zhen , Qu Wei Wei , Song Ling Ling , Yu Xiao Dong , Rao Ting
Published: August 2013

Ni-TiB2-Gd2O3 composite coatings were prepared by electrodeposition method from a nickel cetyltrimethylammonium bromide and hexadecylpyridinium bromide solution containing TiB2 and Gd2O3 particles. The composite coatings were characterized with X-ray diffraction (XRD), atomic emission spectrometer (ICP-AES), scanning electron microcopy (SEM) and energy- dispersive analyses of X-ray (EDAX), respectively. That the codesposition of TiB2 and Gd2O3 into the coatings were demonstrated by XRD, EDAX, ICP-AES and SEM. TiB2 and Gd2O3 entered the lattice of Ni. The incorporation of TiB2 and Gd2O3 particles in the matrix can largely reduce the wear of the nickel composite coatings.
Earthquake Mechanics Study with Health Check for a Seismic-Damaged Tunnel Suffered from the Wenchuan Earthquake
Authors: Zhang Jia Xin
Published: August 2013

The health diagnosis of seismic-damaged tunnel seismically damaged is important in recovering traffic lines for seismic relief and recovery. Taking a tunnel damaged tunnel in the Wenchuan earthquake as an example, the methods of safety check is exposed. The non-destructive test showed that the seismic damage to this tunnel included concrete cracks, hidden cavities, and strength deterioration of lining. Several causes induced in seismic diseases were discussed. The rehabilitation technique, which needs not break off transportation through the tunnel, was also put forward. It is hoped that this earthquake mechanics study can enhance the stability assessment and tunnel reinforcement in a highly seismic region.
Experimental and Application Study of a New Type High Strength Repairing Mortar for Hydraulic Concrete
Authors: Wu Fei , Jiang Chao Hua , Liao Ying Di , Hou Li Jun
Published: August 2013

Be aimed at concrete surface damages of hydraulic concrete structures, a high strength repairing mortar was made in this paper. The mechanical properties and durability of repairing mortar were studied. Samples of repairing mortar preparation in laboratory and in field were tested respectively and its repair process and quality control was discussed. The results show that the repairing mortar has good mechanical property, obviously anti-abrasion property and excellent bonding performance. It can play an important role in concrete repairing in the field of hydraulic engineering. The sample property from field is a little lower than of laboratory made but still superior to design index. To achieve good repairing effect, construction technology and quality control is also the important factor.
A Review Paper of Sea-Water Ice Slurry Generator and its Application on Indonesian Traditional Fishing
Authors: Pamitran Agus Sunjarianto , Ardiansyah Helmi Dadang , Novviali Mach
Published: August 2013

Sea-water ice slurry generator is aimed to produce ice-slurry using sea-water while fishing on boat. Some models of ice slurry generator have been researched and developed. Indonesia as an archipelago and maritime nation has big potential in fishery. Appropriate model for Indonesian traditional fishing boat is necessary. The most important part of ice slurry generator is evaporator, including auger and scrapper. Some studies on ice slurry are presented in this review paper in order to get larger view on design of ice slurry generator.
Effects of Firing Mode on the Performance of Flameless Combustion: A Review Paper
Authors: Abuelnuor Ali Abuelnuor Abdeen , Wahid Mazlan Abdul , Saat Aminuddin , Sies Mohsin M. , Osman Abdalla Mohamed , Ehsan Hosseini Seyed , Darus Amer Nordin , Mohammed H.A. , Dairobi Ahmed G.
Published: August 2013

Flameless combustion is of a great interest since it simultaneously provides higher thermal efficiency together with controlling the pollutant emission such as NOX. This technology has been used to provide large energy savings in power system and industrial heating applications. In this technology, the preheat temperature of the combustion air must be higher than the auto-ignition temperature of the reactant mixture. In this review, papers concern the effect of firing mode to reduce pollutant emissions such as NOX emission and combustion efficiency for flameless combustion were reviewed. Summaries on the influences of the firing mode in the flameless combustion were presented, discussed and analyzed. The review concludes that all the previous studies have asserted that a parallel firing mode gives much lower pollutant emissions and high efficiency compared with staggered and counter modes.
A Design of 3D EMC Scanning System
Authors: Chen Ping , Zhang Jie , Chen Lei , Wang Lin
Published: August 2013

3D Electro Magnetic Compatibility (EMC) Scanning system is based on a spectrum analyzer as the core, can provide the relevant parameters of the EMC quickly and accurately, and can be a single component, PCB, machine, cable-round three-dimensional test. Through the host computer, it can realize the visualization of electromagnetic radiation to show real state of electromagnetic radiation.
Numerical Investigation on Circumferential Overlap Trisection Helical Baffle Heat Exchanger
Authors: Dong Cong , Chen Ya Ping , Wu Jia Feng , Cao Rui Bing
Published: August 2013

The circumferential overlap trisection helical baffle shell-and-tube heat exchanger (cothSTHX) is a modification one based on the quadrant helical baffle one to improve the heat transfer performance. The model of cothSTHX has 34 tubes and 3 rods with tube layout of equilateral triangle and a baffle inclined angle of 20°, and the numerical simulation of flow and thermal performances was conducted using the commercial CFD software FLUENT. The distributions of temperature, pressure and velocity, and temperature, pressure or velocity nephograms with superimposed velocity vectors for special slices can provide access to important implicit information in the simulation results. The Dean vortex secondary flow, which is one of the key mechanisms of enhancing heat transfer in heat exchangers, is clearly depicted, and it shows that the fluid in spiral channel flows outward under the centrifugal force, then flows back to the axis under radial differential pressure, thus a single vortex is formed in each baffle pitch cycle. The unfolded concentric hexagonal slices are designed to make up for the defect that the shortcut leakage flow in the V-notch zone of the adjacent baffles could not be depicted along the longitudinal slices. Moreover, the shortcut leakage flow is restricted with the damper effect of the structure that a row of tubes in the circumferential overlap area of adjacent baffles.
Finite Element Analysis of Accessorial Equipments for Carring the Wounded by Airliners Based on MSC.PATRAN
Authors: Tang Li , Yue Jing Tao , Zhang Yin
Published: August 2013

According to the design criteria referred to CCAR-25,the static strengths of accessorial equipments (single stretcher-supporting equipment, double layer stretcher-supporting equipment and nursing-type unit) and the track-mounting mechanism applied to fix the accessorial equipments to the seat tracks of the airliner are analyzed under five loads by using the software MSC.PATRAN. Based on the analysis results, the strengths of the accessorial equipments will be checked, the structures can satisfy the requirements of strength.
Modeling Analysis of Impedance Characteristics of Saturated Core Superconducting Fault Current Limiter
Authors: Peng Jun Zhen , Cao Kun Nan , Wang Da Da , Song Meng , Hu Nan Nan , Wang Fei Hong
Published: August 2013

As one of the most applicable to high-voltage network superconducting fault current limiterSCFCL(saturated core superconducting fault current limiter) ,which use of core saturation properties can be achieved the current-limiting function without delay ,will be the most widely applied in the future,By analyzing the working principle of SCFCL,this paper use of PSCAD and finite element analysis software Ansoft to build the 500kV\/3150A grade SCFCL model and accurate calculation coil self-inductance and mutual inductance, the harmonic of each size and analyzed its Impedance characteristic on the different external parameters,The results show that SCFCL has a excellent performance for high voltage power network short-circuit current limitation, and provides important reference for design.
The Feature Analysis for Transformer Reliability Assessment
Authors: Pang Er Jun , Hong Yu , Tang Gui Ji , Gao Kuo , Hu Yuan Yuan
Published: August 2013

The power transformer is the most important equipment in the power system, so the condition-based maintenance of the transformer has an important significance for the safe and stable operation of the power grid, and condition assessment provides an important basis for the condition-based maintenance. In this paper, the calculation principle of the reliability assessment method is analyzed, and the contribution of each feature value is calculated. It has an important guiding significance for the Power Supply Bureau to provide the condition assessment data, the data with a contribution of large degree should be collected forcibly, so that the data for transformer reliability assessment is the most simplified, improving the assessment rate.
Energy Price Policy Decision-Making Model under Energy Conservation Environment
Authors: Dong An Youa , Tan Zhong Fu , Lin Li Qiong , Ju Li Wei
Published: August 2013

When the price of one commodity changes, its social demand will also change. As a motivation for the social economic development, once energy consumption price changes, producers will change the product price which will affect the final consumers and cause the social demand changes. The change of every social products price and demand will directly affect the gross social production value .And every products different price elasticity will change the economy structure and energy consumption situation which will further affect the emission pollution. So grasping the implementing effects of energy price policy helps to formulate a proper energy price policy, optimize the economic structure, improve the energy efficiency and lower the pollution emission level without seriously influencing the economic development. This paper focuses on the differential power pricing policy and sets up its influencing and decision-making models to the energy price policy.
Application of Nanotechnology in Anti-Counterfeiting Packaging
Authors: Zhao Qian , Wang Kun Qian , Liao Wei Zhen
Published: August 2013

The necessity of anti-counterfeiting packaging and the concept of nanometer anti-counterfeiting technology to explore the application of nanotechnology in the anti-counterfeiting packaging have been briefly described in this paper. The advantages and disadvantages of nanotechnology in anti-counterfeiting material, in anti-counterfeiting inks, in information encryption are compared by analyzing the principles, characteristic and typical cases. In the end, summarizing the superiority and the issues should be resolved in the application of nanotechnology in anti-counterfeiting packaging to show the prospects.
Research on Influencing Factors of Cooling Process on Inclining Aluminum Profile Wall
Authors: Yang Hai Bo , Li Wen He , Wang Hui
Published: August 2013

For these Aluminum extrusion products which cross-sectional shape are complex and size diverse, we usually discuss the convective heat transfer on the structural units with a single own geometrical characteristic separately at first, then combine them into a specified profile and reach a systematic uniform cooling design, to achieve a uniform cooling at last. This paper discussed heat transfer at the inclined wall zone with a calculation method of finite element. The considered factors are the spray distance, the flow rate of cooling mediums, the angle of inclination and the way of placement, which influence cooling effects separately. The results show that spray distance has little impact on cooling effects with an optimum range of 60mm to 100mm. As increasing the angle of inclination and flow rate of the cooling medium, profile has a faster and more uneven cooling. In addition, the way of placing profile with its narrow side attached to roller offers a higher cooling rate.
Purification Experiment of Silica Sand from Gold Ore Tailings
Authors: Nie Yi Miao , Wang Bin , Niu Fu Sheng
Published: August 2013

Based on the properties of silica sand from gold ore tailings, several experiments, such as flotation of sulphide ore, separation of calcite and dolomite, flotation of mica and feldspar, acid leaching tests, were researched in the flotation experiment. The results showed that with series optimum conditions,SiO298.12% was got with 50% productivity (for raw ore) with Al2O3 1.00% ,Fe2O30.10% , which reached the second product standard of glass raw materials.
Wavelet Finite Element Method Analysis of Bending Plate Based on Hermite Interpolation
Authors: Shen Peng , He Yu Min , Duan Zhi Shan , Wei Zhong Bin , Gao Pan
Published: August 2013

In this paper, a new kind of finite element method (FEM) is proposed, which use the two-dimensional Hermite interpolation scaling function constructed by tensor product as the basis interpolation function of field function, and then combine with the energy functional with related mechanics and variational principle, the wavelet finite element equations for solving elastic thin plate unit that constructed in this paper are derived. Then the bending problem of thin plate is solved very quickly and availably through the matlab program. The numerical example in this paper indicates the correctness and validity of this method, and has high calculation precision and convergence speed. Moreover, it also provides a reliable method to solve the free vibration problem of thin plate and the pipe crack problems.
Fabrication and Evaluation of Flowmeter with Focused-Ion-Beam System
Authors: Choi Dae Keun , Lee Sang Hoon
Published: August 2013

In this paper, we fabricated and evaluated the piezoresistive type flowmeter with focused-ion-beam (FIB) system. The flowmeter body is made up of the low stress silicon nitride, and the nanometer sized piezoresistive layer is deposited with FIB system for the smaller measuring area. The flowmeter is evaluated in the wind tunnel, and the 0~4m/s air flows are applied. Although the sensitivity, ΔR/R shows the negative behavior unlike the conventional piezoresistive layer due to the added materials during the FIB process, the measurement results show the ΔR/R has a suitable sensitivity (-1.04E-2/ms-1) and a rapid response time (0.8sec). Those results represent the fabricated piezoresistive type air flowmeter has the possibility for the small area detection.
Separation of Weak Magnetic Iron Ore with Micro-Fine Particle
Authors: Nie Yi Miao , Chen Miao , Niu Fu Sheng
Published: August 2013

In this paper, separation of weak magnetic iron ore with micro-fine particle was summarized on the base of the reason why this kind of iron ore was so difficult to be used. The methods used now for the fine particle separation were narrated. Four aspects were proposed to utilize the resource with high efficient.
Loss Angle Testing of Polymer Melts at High Shear Rate
Authors: Li Xiang Gang , Liu Yue Jun , Huang Yu Gang , Shi Pu , Tan Mei Jun
Published: August 2013

Theoretical and experimental study of loss angle of polymer melts at high shear rate was done based on multi-function and all-electric rheometer (MAR) designed by the authors. The phase difference of the dynamic components of shear strain and shear stress at the capillary wall proved to be as same as the phase difference of superimposed vibration displacement and the entrance pressure. In order to get the loss angle, the intrinsic vibration displacement was defined and original signal was transformed from time domain representation to frequency domain representation by DFT. The experiment results show that the loss angle increases greatly with the increase of the superimposed vibration displacement frequency. It indicates that the viscous losses increase while the elastic properties decrease with the increase of the superimposed vibration displacement frequency. The loss angle didnt change notably with the increase of the piston steady velocity and the superimposed vibration displacement amplitude. This indicates that the viscoelastic properties keep consistence when the shear rate and piston amplitude changes.
The Design of Comprehensive CAT Test Rig for Electro-Hydraulic Servo Valve
Authors: Feng Shuai , Xu An Bin , Li Dong
Published: August 2013

By comparing the limitation of traditional test rig for electro-hydraulic servo valve and the advantages of CAT test rig for electro-hydraulic servo valve, this paper demonstrates an overall CAT test rig design including hydraulic system design and test software design. This work applies virtual instrument technology based on LabVIEW and adopts OPC standard to realize real-time communication between computer and PLC. Eventually as a case study, a test example of a well-functional servo valve is presented to show the validity and accuracy of the test rig.
New Approach to Delay-Dependent Stability Analysis and Stabilization for Fuzzy Systems with Time-Varying Delay
Authors: Guo Gang , Zhao Su Ping
Published: August 2013

A new method is proposed for the delay-dependent stability control of fuzzy systems with time-varying delay. A new fuzzy Lyapunov-Krasovskii functional (LKF) is introduced to establish a delay-dependent stability criterion. Based on parallel distributed compensation (PDC) scheme, a stabilization condition is derived and the corresponding controller can be obtained by solving a set of linear matrix inequalities (LMIs).
Weak Signal Detection System Based on Lock-in Amplifier Technology
Authors: Lv Yong , Niu Chun Hui , Li Yue Qiang , Chen Qing Shan , Li Xiao Ying , Zhao Zi Ren
Published: August 2013

In order to detect the weak signal deeply buried in the noise, a weak signal detection system based on lock-in amplifier is proposed. The system includes the preamplifier circuit, active low pass filter circuit, AC amplifying circuit and phase sensitive demodulation circuit. Test results show that it can greatly increase the signal-to-noise ratio (SNR) up to 12.7db.
A Sigma-Delta Modulator System Design with 1-1-1 Mash Structure
Authors: Song Ming Xin , Wang Zhi Ming , Yang Yang
Published: August 2013

This paper designs a three cascaded sigma-delta modulator with using mash structure. Analysis of gain coefficient of each module and simulate the modulator for the behavioral level. In 0.5μm CMOS process conditions, the input signal bandwidth is 20 kHz, oversampling rate is 256, SNR of the simulation model can get 100.5 dB, and accuracy is greater than 16 bit. Compared with other structures of the modulator, it has more stable and more dynamic range, so it can be applied to audio-frequency circuit.
Effect of Strontium on the Structure and Properties of ZL102 with Rare Earth
Authors: Cai Guo Sheng , Wu Long , Lu Hai Feng , Li Zhi Long , Lu Hua Feng , Yang Hua , Chen Rong Fa
Published: August 2013

The orthogonal experiments were taken to determine the best metamorphic process parameters of ZL102 by the metamorphic temperature, holding time, and the added amount of Sr and RE. The results indicated that the added amount of Sr and RE were 0.035 wt% and 0.03 wt%, the metamorphic temperature of 740 ° C, holding time of 60 min. The microstructure of the alloy of eutectic silicon became completely the α-Al was small short rod, the tensile strength was 230.5MPa, an elongation of 2.77%.
Intelligent Control System for Intertidal Benthos Research Based on Internet of Things
Authors: Cao Jia Mu , Cao Yi Jiang , Feng Ju Meng
Published: August 2013

A simulation system for intertidal zone environment that can be remotely monitored is proposed. The system is divided into the two parts of remote control center and environment simulator, which are interconnected through wireless network technology. The remote control center performs remote monitoring through upper machine software, while the environment simulator can simulate natural environments such as ocean tides, water temperature and light illumination in different types of intertidal zones. Users can change and access the environmental parameters and data of the environment simulator by making instructions at the remote control center. A stable system is realized in accordance with the design requirements, and actual tests show that main features of the simulated natural environment in intertidal zones are very close to actual environment.
Design of Digital Interface Circuit of Resolver Based on AD2S1200 in a Single Supply System
Authors: Yang Chun Wei , Li Da Zhai , Wang Wei Zhou , Jiang Zhe , Bi Shu Sheng
Published: August 2013

For applications of single supply, a digital interface circuit of resolver based on AD2S1200 is designed in a single 5V system. According to the given resolver, the amplification factor and driver capability of excitation signal is calculated and verified. In order to adjust the excitation signals amplitude and provide enough drive current to the resolvers primary winding, an operational amplifier with high current output capability AD8532 is chosen to set an excitation signal buffer circuit which works as a unity gain inverting proportional amplifier. Besides, the design greatly reduces the amount of components which is especially appropriate for the installation in a constriction space. To give a test for the interface circuit, the microcontroller ATmega16 is used to read the 12-bit parallel angle position data of resolver. The test result shows that the interface circuit can not only work well but also obtain an accuracy of angle position within 0.1°.
The Design and Analysis of the Actuator with Long Stroke and Micro-Displacement
Authors: Pan Ge , Zhang Ya Nan , Sun Lin Zhi , Shen Lin Yong , Wang Cheng Gang
Published: August 2013

In this paper, a new actuator with nanoscale micro-displacement is reported. The actuator not only can achieve a large stroke and nanoscale positioning accuracy, but also has the advantages of compact, low cost, high reliability and a single control system. The drive is controlled by a single power, and it consists of stepper motor, harmonic gear reducer, screw and the guide rail. The stepper motor is controlled by the pulse train and the harmonic gear reducer has high precision and small hysteresis. The precision screw converts the rotary motion of the stepper motor into linear displacement, and the plunger pushes the target in nanoscale motion accuracy through the guide rail finally.
A FMS Dynamic Scheduling Optimization Strategy and Simulation Research
Authors: Hui Ji Zhuang , Ding Xiang , Gao Kai
Published: August 2013

This paper studied the FMS dynamic scheduling problem which was based on Petri net FMS static scheduling optimization algorithm, which in accorder to solve the FMS actual production scheduling problems. A rolling window dynamic re-scheduling strategy was proposed which based on event driven and cycle driven. Then take the emergency machine failure often appearing in the actual workshop for example, this scheduling strategy was analyzed and applied to dynamic simulation and finally the effectiveness of the dynamic scheduling strategy was verified.
Research on Modal Identification of Structures Using Robust Second-Order Blind Identification Technique
Authors: Du Jian Hua , Huang Hong Wu , Lan Dian Dian
Published: August 2013

The paper discusses the basic principle of blind source separation algorithm applying in structural modal identification. By improving the signal-whitening method, a robust second-order blind identification (RSOBI) algorithm is established on the basis of second-order statistics. The modal responses and mode shapes can be obtained using the RSOBI algorithm from the observed data of structures in time domain. Frequency and damping are estimated from the modal responses by traditional single degree of freedom methods. The simulation results show that the RSOBI algorithm has good performance in modal identification of structures.
Integrated CAD/CAE/CAM System for Scorbot-ER Vu Plus Industrial Robot Manipulator
Authors: Prabhu N. , Dev Anand M. , Sundar V.
Published: August 2013

Robots are required to operate in different environmental conditions facing varieties of end-effector to perform the workspace interactions. This paper deals with integrated CAD/CAE/CAM system for SCORBOT-ER Vu plus Industrial robot manipulator. The DH (DenavitHartenberg) coordinate transformation method was used to perform the robot position analysis. The robot manipulator parametric solid models were constructed using Pro/ENGINEER (Pro/E). Pro/Mechanica was used to simulate the dynamic simulation and working space, CATIA was used to implement the cutting simulation, and the prototype was manufactured using a CNC milling machine. Finally, a CAD/CAE/CAM integrated system for a robot manipulator was developed. This integrated system not only promotes automation capabilities for robot manipulator production, but also simplifies the CAD/CAE/CAM process for a robot manipulator.
Automatic Recognition System of Key Tooth Based on Machine Vision
Authors: Zhang Hai Feng , Yang Zhu
Published: August 2013

Key tooth recognition is an important procedure of lock core assembly, it directly affects the assembly efficiency and qualified product rate. The current method is artificial and mechanical recognition, which has defects of mechanical loss, low precision and automatic degree. This paper proposes an innovative solution based on machine vision technology. The recognition system uses TMS320DM642 as the core processor. The image sensor MT9M001 acquires key image. The operation of image processing algorithm produces the key tooth code. Communication with the lock core assembly system uses 485-bus. The experimental result indicates that the method proposed in this paper is superior to the existing methods.
Research of Molten Carbonate Fuel Cells Modeling Based on Neural Computing
Authors: Tian Yu Dong
Published: August 2013

The molten carbonate fuel cell (MCFC) is an important research field of the new energy generation equipment, and is a difficulty in the research field of high-temperature fuel cells at present. To aim at the MCFC modeling problem, the MCFC electrochemical mechanism process was analyzed firstly, then the MCFC modeling applied neural computing is advanced. Thirdly, the structure, algorithm and simulation of MCFC modeling based on feedback neural networks were presented in detail. Finally, the computer simulation and conducted experiment verified that this model was fast and accurate, and can be as a suitable operational model of MCFC real-time control.
Optimal Formation Reconfiguration Control of Multiple UCAVs Using Improved Firefly Algorithm
Authors: Li Yue Guang , Fan Jing Xing
Published: August 2013

Optimal formation reconfiguration control of multiple is a complicated global optimum problem. In this paper, according to the characteristics of Uninhabited Combat Air Vehicles. A Novel Firefly Algorithm was used to solve Uninhabited Combat Air Vehicles, the redesign of the individual location update in the algorithm, and introduced a Levy flight to increase the population search domain. In addition, a local search algorithm is introduced to enhance the local search ability in this paper. the algorithm was experimented and the experimental results show that the new algorithm to be successful in locating multiple solutions and better accuracy. Series experimental results demonstrate the feasibility and effectiveness of the proposed method in solving the optimal formation reconfiguration control problem for multiple UCAV.
Energy Efficient Virtual Machine Allocation in Cloud
Authors: He Zhong Tang , Zhang Xiao Qing , Ji Tong Kai , Xu Zhi Wei
Published: August 2013

Cloud data centers hosting cloud applications consume huge amounts of electrical energy, contributing to high operational costs and carbon footprints to the environment. When virtualized resources of cloud data centers are allocated, the energy consumption is a problem to be considered necessarily. In this paper, three energy efficient virtual machine allocation algorithms are carried on experimental analysis, including MAX, DVFS and dynamic deployment algorithm (DDA). We have evaluated these algorithms by conducting a performance evaluation study using the CloudSim toolkit. The experimental results show that the dynamic virtual machine allocation algorithm like as DDA is more energy-efficient and the virtual machine migration is an efficient saving energy method.
Study on Integrated Scientific Research Management Information System in Higher Vocational College Based on Workflow
Authors: Tang Jun , Hu Zhi Min
Published: August 2013

For the purpose to realize information collection, collation, transfer, tracking and execution required by Hunan Urban Construction College to carry out the function of scientific research and management, and through the re-definition of the workflow process definition, we combine the modeling technology of Petri net and the workflow technology to design the amendment of the workflow process and the storage mechanism. Also we design the data structure of the workflow engine, hoping to make breakthrough on both thoughts and measures for the realization of the research management & information system.
The Study of Elastic Dynamic of the Deployment Mechanism in Large Deployable Reflector
Authors: Wang San Min , Chen Su , Yuan Ru
Published: August 2013

The study regards the ETS-VIII satellite antenna unit deployment mechanism as object, uses multi-body dynamics theory as basement to build the rigid body dynamics model of the unit bodies, adopts the finite element method analysis of bending of elastic deformation of the linkage, to establish a unit elasticity of dynamics model and to research the components of flexible dynamic properties of the cell bodies of satellite antenna development. The result of the research shows that the flexibility of the component will lead to the elastic deformation of the cell bodies, in which beats significantly in the location of the maximum abduction, takes place in the deployment process. The research lies the foundation for the dynamic optimization of design of development structure.
Buckling Analysis of Inclined Beam-Column Structures by Using Differential Transform Method (DTM)
Authors: Ozkan Ayse , Özkol Ibrahim
Published: August 2013

In this work a classical structural element inclined beam-column has been analyzed for two boundary conditionsby applying a semi-analytical numerical technique differential transform method (DTM).Eigenvalues related to critical load and length, and deflection curves are presented for pinned-pinned and clamped-pinned end condition cases.
Mechanical Efficiency of a Mass-Spring System in Hypergravity, Normal Gravity and Microgravity
Authors: Kadri Shahrul , Wan Aziz Wan Nor Suhaila , Hashim Mohd Helmy , Jaafar Rosly , Yaacob Mohd Ikhwan Hadi
Published: August 2013

The operation of a mechanical machine may behave differently in various gravitational conditions. We compare the mechanical efficiency of a mass-spring system in three different gravitational conditions, namely hypergravity (2G), normal gravity (1G) and microgravity (0G) through parabolic flight. The simple system consisted of a mass load (18.92 g and 21.97 g) attached between two springs 6.91 N/m which make overall length 410 mm. The mechanical efficiency is justified by the decay of the oscillation amplitude of the attached load. Our result shows that the mechanical efficiency for the simple mass-spring system is better in lower gravitational condition.
Performance Analysis of Bipropellant Propulsion System on Special Working Conditions
Authors: Lin Zhen , Li Yong
Published: August 2013

At the end of a test satellite, oxidant of the propulsion system was exhausted ahead of fuel. Long-term monopropellant working condition without combustion, cool gas flow working condition and interim working condition were experienced, which trouble the de-orbit control of the satellite. In order to evaluate the performance of the propulsion system on the special working conditions during the satellite de-orbit, theoretic analysis of the specific thrusters is introduced. And effective calculation method is built. Based on the method and obtained remote data, the thrust and specific impulse of the propulsion system on monopropellant working condition and cool gas flow working condition are calculated. It is indicated that, on monopropellant working condition, the thrust of 10N thruster declines 83%, the specific impulse declines about 82%. On cool gas flow working condition, the thrust of the 10N thrusters is less than 0.12N, and declines with the decrease of the tank pressure. The specific impulse is less than 146s. These results can be consulted by other satellites confronting similar conditions.
A Review of Ignition Delay and Combustion Characteristics of Biodiesel Fueled Diesel Engine
Authors: Qate Mehran , Pourabdian Majid , Javareshkian Alireza , Farzbod Ali
Published: August 2013

Increasing rate of demanding biodiesel as alternative energy resource, persuade researchers to investigate engine performance of biodiesel-fueled engines, which are highly influenced by ignition delay (ID) and combustion characteristics of such a fuel. This review article introduces a literature review on ignition delay (ID) and combustion characteristics of diesel engine fueled with biodiesel. Slightly difference between combustion characteristics of bio fueled engine and petroleum diesel one recognized as result of carried out investigations. Early start of combustion (SOC) and shorter ID of biodiesel comparing to diesel is reported by most of investigations. Lower compressibility, higher Cetane Number (CN) and fatty acid composition of biodiesel have been recognized as the principle elements of early SOC and shorter ID. It is also revealed that heat release rate (HRR) of biodiesel comparing to diesel is slightly lower because of lower calorific value, shorter ID and higher viscosity.
The On-Road Exhaust Emissions from Vehicles Fitted with the Start-Stop System
Authors: Merkisz Jerzy , Fuc Pawel , Lijewski Piotr , Ziolkowski Andrzej
Published: August 2013

The paper describes the influence of the start-stop system on the exhaust emissions and fuel consumption. The tests were performed for two vehicles. The first one was a vehicle designed specifically to operate in city conditions. It was fitted with a gasoline engine of the displacement of 0.9 dm3 and maximum power output of 63.7 kW. The other vehicle was an SUV (Sports Utility Vehicle) fitted with a diesel engine of the displacement of 3.0 dm3. The measurements of the exhaust emission were carried out on the same route under actual traffic conditions. For the tests a portable exhaust emissions analyzer from the PEMS group SEMTECH DS was used (PEMS Portable Emissions Measurement System).
A Study on Systematic Procedure for Choosing the Best Powertrain Configuration in Hybrid Sedan Cars
Authors: Mehrkish Ali , Tahani M. , Ghazanfar H. , Norouzi Ghazbi S. , Zare S.
Published: August 2013

With increasing market awareness for fuel efficient vehicles, automotive manufacturers are rapidly adopting various hybrid electric configurations (HEVs) to a wider range of passenger vehicles. There are three major HEV configurations depending on the connection between the components that define the energy flow routes and control ports: series, parallel and series-parallel hybrid. Each configuration includes variety of power-transmission patterns.
Choosing the right pattern has been always the most important decision in design process of HEV. This paper presents an introduction to hybrid electric vehicles, the commonly used configurations of the powertrain and finally the selection methodology. This methodology could be used by designers to choose the best power-transmission architecture in design processes of a hybrid sedan car with given specification. The expert choice software is used in selection process. The software is programmed based on AHP method. AHP is a structured method which is used for choosing between several options. The introduced method in this article could be used by designers in designing hybrid electric vehicles in all ranges of hybridization.
Improved Packing Representation Model for the Orthogonal Packing Problem
Authors: Chekanin Alexander V. , Chekanin Vladislav A.
Published: August 2013

The multidimensional NP-hard orthogonal bin packing problem is considered in the article. Usually the problem is solved using heuristic algorithms of discrete optimization which optimize a selection sequence of objects to be packed in containers. The quality and speed of getting the resulting packing for a given sequence of placing objects is determined by the used packing representation model. In the article presented a new packing representation model for constructing the orthogonal packing. The proposed model of potential containers describes all residual free spaces of containers in packing. The developed model is investigated on well-known standard benchmarks of three-dimensional orthogonal bin packing problem. The model can be used in development of applied software for the optimal allocation of orthogonal resources.
Optimization of Multiple Quality Characteristics in Laser Cutting of Difficult-to-Laser-Cut Material
Authors: Norkey Gavendra , Dubey Avanish Kumar , Agrawal Sanat
Published: August 2013

This paper presents experimental study of laser cutting of Aluminium alloy sheet with the aim to optimize multiple quality characteristics such as cut edge surface roughness and kerf deviation, simultaneously. The Taguchi method combined with Grey relational analysis has been used for parameter optimization. The Principal component analysis and entropy measurement method have been used for eliminating co-linearity and deciding the weighting factors, respectively. The results indicate considerable improvements in multiple quality characteristics.
The Finite Element Analysis of the Rollers in a Rotary Steerable Drilling Tool
Authors: Zhang Guang Wei , You Li , Li Zhao
Published: August 2013

Rotary steerable system (RSS) is a system complete the oriented features in real-time while a drill string rotary drilling. It is a major change since the 1990s in directional drilling technology. RSSs drilling frictional and torsional resistance is small, has a high drilling speed, low cost, the well trajectory is smooth and easy to control, it is considered to be the development direction of modern steering drilling technology .When the system working ,drilling pressure and torque are passed by the thrust bearings in the controlled bend sub oriented tool; therefore it is necessary to analysis the rollers load distribution to verify the design parameters of variation cardan shaft, thrust bearings and roller are correct or not, This article analyzed thrust bearings rollers by ANSYS. Determine its maximum stress, etc. Providing more intuitive and scientific basis for its structural optimization [1].