bluuebunny/crossref_metadata_2025 huggingface dataset:
Motion of Transverse Shock Tester Guided by Parallelogram Mechanism
Authors: Wen Zhao Dong , Yan Ming , Zhang Lei
Published: January 2015

The transverse shock tester is an important device to assess the shock resistance ability of ship equipments. Because of the shock point and the gravity center of the tester are not on the same horizontal, the device may generate huge overturning moment. We adopt the finite element method to do the dynamics analysis of the transverse shock tester, using the parallelogram mechanism as its guide device, to analysis its output waveform and other problems, and find: it will appear saw-tooth acceleration waveform result from the oscillation caused by the overturning moment during the impact process; the oscillation will greatly increases the hinge load--changed following the oscillation amplitude periodically--of the parallelogram mechanism; the hinge inner friction almost has no effect on the impact tester movement or the output waveform. From the above statements, we can see that the parallelogram mechanism can not only share the overturning moment generated by the transverse impact, but also can ensure to get the desired output waveform, thus it suits to be used as the guide device of the transverse shock tester.
Sensitivity Analysis of Measurement Parameters of Marine Inter-Cooled Gas Turbine with Low-Pressure Compressor Fouling
Authors: He Xing , Li Yu Jie , Liu Yong Bao
Published: January 2015

According to the mechanism of thermal system modelling method, the implanting the health factors is adopted, the steady state non-1inear performance deterioration model is founded by integrating experience performance with thermodynamics theory. Considering the low-pressure compressor suffer from fouling, the performance deterioration of gas turbine is simulated based on the temperature-control of outlet of combustion chamber. The measurement parameters of variation are obtained; the mechanism and sensitivity of the change are defined. The results illustrate that the outlet pressure of the low-pressure compressor is degenerated obviously, so can be well-monitor sensors. The deterioration of low-pressure shaft speed is strong non-1inear decreased vs. the fouling increased. Thanks to the cooling for air of outlet of low-pressure compressor by intercooler, in conjunction with the power decreased of low-pressure turbine, the temperature of outlet of low-pressure compressor is have not bad influence on the high-pressure compressor. So the temperature without severe cast down, it is not fine for health monitor.
Flow Field Theoretical Optimization and Experimental Verification of Centrifugal Pump
Authors: Lin Yuan Sheng , Zhang Quan , Dai Lu , Hu Xu
Published: January 2015

Researches on vibration of centrifugal pump induced by fluid exciting forces are significant for reducing equipment faults, which are caused by the vibration transferring from the base, and noise emission of shells which connected with the base. Fluid exciting forces are the main vibration sources in centrifugal pump systems. The vibration of impellers is generated by fluid exciting forces, and transferred to mechanical systems through pump shell and shaft bearings. By optimizing of inner flow filed of centrifugal pump, not only the fluid exciting forces can be reduced, but also the vibration level of the pump can be improved. In this paper, based on reducing noise and isolating vibration, the inner flow field of the centrifugal pump was emulated by CFD method. The flow field was optimized by controlling the impellers cutting process. The optimizing results were shown by comparing the pressure pulsation of the optimized flow field with those of the original flow field. The improvement of optimization was verification by measuring the vibration responses of the centrifugal pump base structure. The experimental results shows that: the level of flow field excitation and the pressure pulsation of flow field under the blade frequencies and multiplication frequencies are declined to some degree by cutting impellers; the vibration responses of pump base decreased 4.5 dB after cutting impeller.
Investigation on Power Transmission for the Isolation System Mounting on Plate-Shell Coupled Structure
Authors: Dai Lu , Yang Tie Jun , Hu Xu , Ke Han Bing
Published: January 2015

An approach of combining the rigid body theory and improved Fourier series method is proposed to model the single-stage isolation system based on an elastic plate-shell coupled structure, and the isolation performance is investigated. Considering the practical problems of the machinery system design in the field of marine engineering, the influences of various structural parameters on the isolation performance for the isolation system is implemented. The numerical simulation results are given and discussed.
A Method of Parametric Design of Automobile Synchronizer Ring Based on UG Secondary Development Tools
Authors: Cui Huan Yong , Tian Na , Li Rui Chuan , Men Xiu Hua
Published: January 2015

To realized the parametric design of automobile synchronizer ring spline tooth efficiently, a method is presented in this article, which is realized based on the UG secondary development tools. The user environment settings and the establishment of the menu file and the human-computer interaction window are introduced in detail. The programming language is written to realize the parametric design of the spline tooth of synchronous ring. Application result shows that the method simplifies the synchronous ring modeling process and improves the working efficiency.
Finite Element Analysis of one New Type Hybrid Bus Frame
Authors: Liu Gao Jun , Zhang Tie Zhu , Yin Huai Xian , Zhang Hong Xin , Zhang Lu Zou , Duan Ben Ming
Published: January 2015

The hybrid bus frame is a vehicle’s main bearing component, in which bearing stress state is very complex. In this article, the virtual prototype vehicle model is established to extract dynamic loads between each key connecting parts and the hybrid bus frame. At the same time, the hybrid bus frame finite element model is established to make strength and stiffness analysis with dynamic loads as boundary conditions. The results verify that the strength and stiffness can meet the hybrid bus frame requirement, and the largest deformation and stress area is found. The results also can provide an important basis for correcting the frame structure. What’s more, this paper makes a comparison between the method of the frame finite element analysis based on dynamic loads and the method of the frame finite element analysis based on the statics, concluded a result that the frame finite element analysis based on dynamic loads can more accurately describe the real stress state of the frame and the analysis result is more reliable.
Numerical Study of the Characteristics of Rotary Spool Orifice in Water Hydraulics
Authors: Wu Jin Jun , Yang You Sheng , Li Jing Yuan , Yu Ge Gang , Jiao Zong Xia
Published: January 2015

The rotary control orifice, in which the relative angular openings are adjusted by the rotary motion of the spool, thus controlling the flow area and the flow passing through, is a basic control element of hydraulic control valve. It has several advantages, such as little minimal steady flow rate, good anti-contamination, small driving power, small opening and shutting shock, and etc., over the translational control orifice. The working medium is tap water. A model is developed and numerical studies are carried out to investigate the hydrodynamic characteristics of the rotary control orifice, including flow and pressure field, flow characteristics, flow torque. The relationships between the flow and the pressure drops, the efflux angle and the angular openings, the steady-state flow torque and the pressure drops as well as the angular openings are obtained. The results show that a) the orifice geometries have great effects on the efflux angle and the steady-state flow torque; b) Under the same openings and flow direction, the efflux angle is almost constant under different pressure drops. It is larger for meter-in flow than for meter-out flow and decreases with the increase of openings; c) The steady-state flow torque (including meter-in flowTsfinand meter-out flowTsfout) is proportional to the pressure drops and first increases and then decreases with the increase of openings, finally reaches zero at the fully opened position; d) The friction moment is proportional to the rotary speed so as the transient flow induced moment to the rotary acceleration. The in-depth study of the drag moment of rotary control orifice helps to design high performance rotary servo valve for robots. The in-depth study of the rotary control orifice provides a basis for developing high performance rotary control valve.
The Research of Grading Dehydration Technology on Slurry Pipeline Grade Conveyor
Authors: Liu Hong Wei , Chen Hai Tang , Pu Guang Yue , Pan Chun Lei
Published: January 2015

To solve the confusing problem of different grades of slurry in the grades pipeline, this paper presents a new technology for slurry sizing dehydration. The method realizes the grading treatment by making full use of dehydrating station agitation tank and thickener buffer storage capacity. Research has shown that the method can effectively solve the grading dehydration process after the arrival terminal dehydration station in different grade slurry, and ensure the multi-grade mineral classification sequence transportation process completed successfully.
Analysis on Contact Stress after Gear Meshing and Finite Element of Stiffness
Authors: Wu Ru Yang
Published: January 2015

According to APDL language of ANSYS, this paper establishes the ideal identity model of tooth profile and gear based on ideal tooth profile equation, and it gets the ideal gear profile in meshing period and change curve of maximum contact stress with position of gear meshing. The result indicates that the contract stress distribution of ideal gear profile presents certain regularity with meshing state of double gear. Gear module can not change the stiffness value of gear meshing; increasing the number of driving wheel can reduce meshing stiffness. Finally, this paper gets the curve of meshing stiffness changes with load. The result indicates that the effect of load on deviation and tooth profile and gear meshing is larger than that on idea tooth profile and stiffness of gear meshing.
Ellipsoid Reticulated Shell of Parametric Design and Analysis of Mechanical Characteristics
Authors: Lu Xiao Yang , Xin Jing , An Ran , Liu Jin Ming , Wang Lei , Liu Feng Cheng
Published: January 2015

By using the parametric design language APDL, developed ellipsoidal reticulated shell parametric macros, only enter the long axis S1, short axis S2, high vector F, scale factor t, ring symmetric region shares Kn, radial nodes turns Nx, to generate the desired lattice shell; comparative analysis of 30 kinds of scheme through two types of single-shell ellipsoid reticulated shell with different rise span ratio force, studied its stress characteristics, providing a theoretical reference for designing and engineering ellipsoid reticulated shell application.
Coupling Effect of Temperature Stress in Butterfly Valve Mechanical System Based on FLUENT Numerical Simulation
Authors: Wang Xiao Zhi , Zhu Hong Hui , Liu Zhi Gang
Published: January 2015

The butterfly valve system is an important part of the steel heating furnace temperature control. In high temperature, the coupling effect of temperature field and stress deformation of the butterfly valve is stronger. We did not consider it in the numerical simulation research in the past, and studied the overall characteristics of butterfly valve only by 2D numerical simulation, resulting in the decrease of the numerical simulation accuracy. This paper uses the way of the FLUENT software and ANSYS software joint control, and has established the mathematical model of fluid and solid coupling effect, and has implemented the coupling effect of the temperature field and stress field of the butterfly valve system by means of three dimensional numerical simulation, then we have got the temperature distribution and stress distribution of the butterfly valve system, which provides technical reference for mechanical system design of butterfly valve.
CNC Cylindrical Grinding Machine Reliability Analysis and Optimization
Authors: Fan Jin Wei , Yi Xiao Long , Liu Chao , Liu Yong Jun
Published: January 2015

CNC cylindrical grinding machine reliability is an important performance indicators, the level of reliability will directly affect the use of CNC cylindrical grinding machine. Reliability of the traditional classification method is not clear, standards are not uniform, the paper application taxonomy for 12 CNC grinding machines from September 2012 to July 2014 for two years more than 600 pieces complete failure and repair data for statistical analysis to identify a greater impact on the overall reliability of the fault location and cause of the malfunction. According to the probability of occurrence of each failure mode, the severity of harm's comprehensive evaluation of the degree of fault of each site, identify the weak links of the whole system. As a result, the reliability of CNC cylindrical grinding machine will be greatly improved.
Flight Dynamic Characteristic Analysis of a Generic Airbreathing Hypersonic Vehicle
Authors: Yang Rui Guang , Yu Jian Qiao , Shen Yuan Chuan
Published: January 2015

Because of the high speed, strong coupling between aerodynamics and propulsion system, complex environmental conditions and new propulsion system, the airbreathing hypersonic vehicles have a complex dynamics characteristic. This paper use the generic hypersonic vehicle model (CSULA-GHV) to research this issue. The nonlinear longitudinal equations of motion are linearized based on the assumption of little perturbation. Analyze the dynamic characteristic on a feature point selected. The results show that, the stability of this model is poor. It has to design an efficient controller to adjust the poor stability.
Mechanism Analysis of Anchor Bolt and Cable Synergistic Action in Coal Roadway Support
Authors: Cheng Peng , Zhang Jian , Liu Ai Qing
Published: January 2015

Aiming at the current situation of anchor bolt and cable arrangement in mine roadway support, the paper analysis the mechanical characteristics and mechanism of bolts and cables, and numerical simulation method is used to comparison and analysis of pre-tension distribution characteristics under different anchor bolt-cable arrangement. The research indicated that separate anchor bolt-cable layout in different sections, anchor bolt and cable force stable equilibrium, coordinate with each other, at this time roadway surrounding rock of shallow and deep pretension distribution more reasonable, can play a role of bolt anchor cable synergistic action, and form the best pre-tension load-bearing structure, which is helpful to keep the stability of coal roadway.
Microstructure and Mechanical Properties of Low-Si Spring Steels Produced by Quenching- Isothermal-Quenching-Tempering Process
Authors: Zhao Fei , Zhang Huan , Liang Yi Long
Published: January 2015

An investigation of low Si spring steels (50CrVA) subjected to quenching-isothermal-quenching-tempering (Q-I-Q-T) process is presented. The results indicated that Q-I-Q-T process lead to the excellent mechanical properties compare to those treated by traditional heat-treatment, quenching and tempering, owing to the multiphase structure. The Q-I-Q-T treated microstructure consists of martensite, retained austensite, bainite and fine distributed carbides.
Establishment of the Dynamics Modal for the Fire-Suction Hydraulic Impactor
Authors: Bao Ze Fu , Zhang Yuan Zhi , Wang Jiang Ping
Published: January 2015

The drilling speed to shorten the drilling cycle plays a decisive role in drilling process.Using the fire-suction hydraulic impactor can achieve percussive-rotary drilling.The fire-suction hydraulic impactor can transform drilling fluid’s pressure energy into mechanical energy.Withing bit static pressure,rotational cutting and vertical impact loading,the way of rock breaking will be faster and more efficient.Using Newton's second law to establish the corresponding kinetic equations,motion equations and displacement equations.The comparison between parameters and measured data validated the correctness of the formulas,which provides a theoretical basis for the products to improve and seriation.
Calculation on Crack Parameter by Extended Finite Element Method
Authors: Zhou Bo , Wang Dong Xue , Xue Shi Feng
Published: January 2015

As a new numerical simulation method, the extended finite element method can deal with the discontinuous problems more effectively than the finite element method. In this paper, the basic theory about the extended finite element method is introduced briefly. The stress intensity factor of the crack of mode I is numerically calculated based on the extended finite element method. The numerical calculations show that the extended finite element method is an approach with high-efficiency for the problems with crack.
Analysis and Evaluation of Wind Turbine Flow Field and Noise Simulation Based on CFD Software
Authors: Weng Ling Xiao , Xu Jiu Nan , Hu Zhi Xin
Published: January 2015

CFD is the abbreviation of the computational fluid dynamics, which is widely used in engineering fluid simulation. Based on two-dimensional N-S equation and k-e turbulence model, this paper uses FLUENT software, finite volume method and SIMPLEC algorithm to do numerical simulation and analysis on flow field in centrifugal fan. In order to improve the efficiency and accuracy of calculation, this paper uses AutoCAD to establish the two-dimensional model of fan, and uses the structured triangular mesh to divide grid. Encrypting the blade can improve the precision and also save the computer memory. Through the calculation we get the internal flow field velocity and pressure distribution in the wind turbine, and get the power level cloud of internal noise in fan. It provides the technical reference for the optimization design of wind turbine.
The New Warhead Concrete Simulation Research
Authors: Wang Ji Peng , Yuan Zhi Hua , Han Tie
Published: January 2015

The new broken-explosive warhead for back deep underground target and airport runway hard target has a unique advantage. Through analyzing hard target characteristics of the concrete , process using ANSYS/LS-DYNA software to break-explosive warhead of a warhead forming process and penetration into concrete target is studied by numerical simulation. Experiments show: the simulation results are accurate. A warhead on concrete penetration and expanding role better, open a channel for level two warhead implement efficient damage. To counter this deep underground and airport target road of hard target penetration has a certain application prospect.
.
Optimization Calculation of Javelin Throwing Results
Authors: Jiang Min , Zhou Ji He
Published: January 2015

On the basis of javelin wind tunnel experiment, we established mathematical model of javelin flight to conduct a computer optimization and got the conclusions. When the initial velocity is in the range of 25m/s-30m/s, the best throwing condition is: the throwing angle is 40°, the angle of attack is 11°. The javelin throwing condition is not zero angle of attack was necessary and sufficient for obtained aerodynamic efficiency.
Analysis the Response of Aerated Flow Depth to the VOF Model
Authors: Zhang Hong Qing , Lou Yi Long , Zhao Qian , Tan Wei Kai
Published: January 2015

In order to analysis the response of aerated flow depth to the VOF model, in this paper, we used VOF combining turbulent model to simulate aerated flow depth in a hydropower station spillway tunnel with high head and large discharge in China. The results show that aerated flow depth is slightly larger than the experiment water depth, but the maximum deviation are not greater than 5% (except the pile number 0+605.236 m). So, using empirical formula to converse the calculate value of water depth into aerated flow depth can make up for the defects of the VOF model which cannot directly get aerated flow depth of the cross section inside the spillway tunnel. But the section water depth can’t be obtained by empirical formula calculation value conversion when cavity exists in the spillway tunnel.
Research on Longitudinal Motion Prediction of Hybrid Monohull Considering Based on Numerical Simulation
Authors: Tian Bo , Ren Hui Long , Dong Zhi Yuan
Published: January 2015

The shape of hybrid monohull at the bow is quite complex and the viscosity force is the main component of the damping force in the drainage area of the bow when the ship moves in waves so that the result of the motion predicition by the traditional potential flow method is very different from the result of experiments. This paper tries to use new numerical compute method considering the effect of the viscosity to improve the precision of the sea keeping predicition. Based on the Reynolds Averaged N-S Equations (RANS) method, the paper takes a hrbrid monohull to compute the hydrodynamic coefficients. According to the result of model test, the prediction of the hybrid monohull’s the longitudinal motion in regular waves at speed of 18kn also indicates that RANS method can reflect viscid influence reducing the motion of hybrid monohull in waves.
Analysis of Thermoelastic Damping in Bilayered Circular Microplate Resonators
Authors: Zuo Wan Li , Li Pu
Published: January 2015

Predicting thermoelastic damping is essential in the design of the next generation of layered composite microresonators. We present an analytical model for thermoelastic damping in circular microplates using the framework developed by Bishop and Kinra. The thermoelastic damping spectrum will exhibit two distinct peaks when the thermal conductivity of the substrate is much greater or less than that of the film. Increment of the thickness of a layer with the bigger Zener’s modulus will increase the peak damping.
Attenuation for Multiple Scattering of Laser in Atmospheric Aerosols
Authors: Wang Hong Xia , Zhang Qing Hua , Sun Hong Hui
Published: January 2015

In this paper, the scattering parameters of aerosol particles are calculated based on Gamma model of atmospheric particle size distribution and the Mie scattering theory for 0.53μm、1.06μm and 10.6μm laser. For the transmission attenuation of the laser in aerosol, the Monte Carlo simulation model is established. The transmittances with propagation distance are calculated for three kinds of wavelength laser in the continental, marine and cumulus aerosols respectively. The results show three kinds of wavelength laser transmission attenuation in cumulus clouds are far stronger than in the continental and marine aerosol. The transmission performance of 10.6μm laser is best in continental aerosol. For marine aerosol, the attenuation to 0.53μm laser is stronger than to 1.06μm and 10.6μm.
Influence of Front Wheel Alignment Parameters on Handling Stability of Vehicle Based on Joint Simulation
Authors: Wang Hui , Wang Xiao Zhi
Published: January 2015

This paper uses AMESim software to establish simulation model of SGA170 mine truck full hydraulic steering system, and validates the correctness of the proposed model. Through the joint simulation, vehicle steady circular test, double lane change test and steering wheel angle input test are verified. By changing the initial alignment parameters of front axle, vehicle handling performance are tested through the same simulation test, and yaw velocity, and the curves of lateral acceleration and vehicle roll angle describing vehicle handling stability are obtained, which provides a reference for the design and improvement of the similar mine truck selection.
Research on Jumper and Connector Detection of Silk Products
Authors: Yang Chang Niu , Sun Xing Bo
Published: January 2015

An improved morphological edge detection algorithm for silk products jumpers and connectors’ test was proposed. With structure elements of different models, we detect the edge information in different directions of silk products respectively; using the proposed adaptive fusion method based on histogram matching, we can obtain ideal image edge, while enhance the blurred edges, and effectively eliminate the silk products inherent texture and noise, then detect the clear jumpers and connectors.
Detection of Demagnetization Fault in Interior Permanent Magnet Synchronous Motors for EV Based on UKF
Authors: Chen Tao
Published: January 2015

In most applications, the permanent magnet flux linkage of interior permanent magnet synchronous motors is treated as a known constant value. However, high operation temperature, stator winding starting current impulsion, armature reaction and frequent field weakening control all may cause irreversible demagnetization of permanent magnet which has direct impacts on motor control performance. In order to implement demagnetization fault detection accurately, the nonlinear observation model is first set up allowing for the effects of magnetic saturation and cross saturation of IPMSM, and then the unscented Kalman filter (UKF) , based on dynamic data processing technology, is presented to implement flux linkage estimation and overcome the disadvantages of traditional extended Kalman filter (EKF). Finally, the simulation results are presented to verify the effectiveness of the proposed method, it is pointed that this method can estimate the permanent magnet flux linkage with the estimation error less than 3% in the full speed range of IPMSM, so it is fully competent for demagnetization fault detection, and consequently, can also prevent the deterioration of demagnetization and improve the reliability of drive system.
Analysis of Influence on Seawater Electric Field Measurement by Sphericity Sensor
Authors: Wang Xiao Bei , Xia Li , Wang Xiang Jun , Ji Dou
Published: January 2015

The underwater electric field model of spherical sensor is established. According to the condition that boundary condition is some certain eigenvalue, affects on underwater electric field by spherical sensor is derived. At last, the underwater potential distribution around spherical sensor is calculated through numerical calculation method.
Fault Signal Detection System of Large Scale Integrated Circuit Based on Single Chip Microcomputer
Authors: Li Xiu Ying , Liu Cun Ping , Mei Rong Fang
Published: January 2015

In the process of fault signal detection of large-scale integrated circuit, the fault signal detection can improve the working performance of large-scale integrated circuit. The traditional detection system is simple, time-consuming, and the error is large, the fault signal detection haslow accuracy. In view of this situation, a new design method of large scale integrated circuit fault signal detection system is proposed based on single chip microcomputer. S3C2410 is taken as hardware design basis, and the signal sensor is used, the software algorithm uses three B spline wavelet transform for ORB wave detection method. The detection is completed.The experiment experimental results show that the system can improve the detection accuracy greatly, and effectively improve the work efficiency.
Parallel Measurement Based on Laue Effect
Authors: Yang Mei He
Published: January 2015

In the paper, interference measurement method for end surface parallel measurement of transparent materials is described. Firstly, basic principles of optical plane template equilibrium point detection are analyzed, measurement algorithms and formulas for calculating optical parallelism are proposed, then possible error of algorithm is analyzed in details, concrete plan for correcting the error is proposed, overall method for testing parallelism is proposed on the basis, and finally related experiment is designed for testing and analyzing the method. Test results show that the method can prominently improve precision of testing parallelism with excellent testing effect.
The Design of Bearing Monitoring System Based on Acoustic Emission Signal
Authors: Huang Ke , Bu Zhi Kang , Zhang Chi , Xie Heng Lian
Published: January 2015

After experimental verification, in terms of low-speed bearing fault diagnosis, the acoustic emission method is superior to the traditional vibration method. In order to further the study of the correlation between AE signals and the bearing state, this article refers to the bearing condition monitoring system, and gives detailed parts models, the acoustic emission acquisition system, which provides help for further researches.
Fault Diagnosis Based on Vibration Signal of Rotating Machinery
Authors: Zhang Wen Wen , Li Na , Ma Yun Fei
Published: January 2015

Rotation machine plays an important role in the production of electric power, chemical industry etc... In the methods of fault diagnosis, the selection of the Pc and Pm of common genetic algorithm will influence its convergence and is easy to be trapped into the local optimum to propose an adaptive genetic algorithm of the fault diagnosis; and in the implementation of system function, it takes the S3C2410 chip as the core of the microprocessor and uses the embedded Linux as the operating system as the software development platform. In this paper ,it introduces the design of the various parts of the system hardware in details, achieves the Boot Loader through combination of the hardware platform and successfully transplants the Linux operating system and builds a root file system, with the combination of the Linux operating system platform, it achieves the LCD frame buffer display device frame buffer, touchscreen A/D converter and development of Ethernet driver program, and the develops the data acquisition, wavelet packet analysis and Ethernet driver program etc. based on the system functions.
A Kind of Multi-Functional Wall Surface Nondestructive Testing Device
Authors: Fan Jin Wei , Liu Yi Jia , Chen Ling , Ji Shi , Yuan Shuai
Published: January 2015

In this paper, non-destructive testing on the inner wall surface of the deep, invented a detection device, the device by numerical control systems, mechanical control devices and imaging device components. PC lower machine controlled by CNC system mechanical devices IPC and PLC can control the composition includes a manual lift the car up and down movement, control multistage axial movement of the cylinder and the axial rotation of the servo motor control to meet the imaging device the location requirements. Imaging device consists of a high-speed industrial cameras and miniature camera components. The device has a low cost, high accuracy, simple manufacturing process and so on.
The Wireless Monitoring System of Shipbuilding Gantry Cranes Based on S3C6410
Authors: Tang Ya Ping , Wu Hai Bo , Liu Hai Long
Published: January 2015

For the insufficient of the present monitoring and control system of the crane in communication mode, monitoring data and data is stored; the system of gantry crane safety monitoring and control based on S3c6410 ARM11 is designed in this paper. The Zigbee wireless networking is used to collect and deal with the distributed sensor monitoring, and it can find the problems and to control in the shortest time. To realize the "black box" record function, the SQLite3.0 embedded database is transplanted to real-time storage the Critical data. It is confirmed that the system operation is stable and reliable that can guarantee the monitoring and control system operation security and improving work efficiency, and it has a good application prospect.
An Error-Detecting System of Books Based on Two-Dimensional Code Scanning
Authors: Xu Hai Zhou
Published: January 2015

In order to improve the management of modern large library, an automatic system is needed to arrange the books. The system uses two-dimensional code recognition technology and microcontroller control technology to achieve the efficient management of library. We choose STC89C52 chip as the core controller and the scanning module in the HR-200 laser two-dimensional code scanner as the external communication port. Data is transmitted by serial communication interface between them. By scanning the two-dimensional code on the books and shelves, we can quickly find out the books in wrong position. In this way we can enhance the efficiency of books management obviously. In comparison with the experimental results, the feasibility and rationality of the design are validated as well as the practicability of the system.
Based on ANSYS Analysis of the Carbon Fiber Structure Equivalent Method with Bending Fatigue Properties
Authors: Yang Tian Cun , Sun Yan Qin , Cheng He Ming
Published: January 2015

In the test of higher fatigue load applying to big dimension of carbon fiber plate, the shortage of just right dimension sample block, at the same time, inconvenience applying uniform load, concentrated equvalent on smaller sample block according to FEA simulation caculate is needed. How to exactly equal is the key to the problem.
Iterative Genetic-Algorithm-Based Surface Reconstruction Method for Repair of Twisted Blade
Authors: Wu Hai Dong , Chen Jie Dong
Published: January 2015

When remanufacturing complex surface parts, such as twisted blade, it is difficult to obtain an accurate model. An iterative Genetic-algorithm-based-surface reconstruction method for repair of twisted blade is presented. Genetic algorithm is applied in parametrizing data points and computing knot vectors. Then, the control points of the fitting B-spline surface are calculated by least-squares approximation through either SVD or LU methods. It shows that the accuracy of the method is improved significantly when three different twisted blades surfaces are verified by using the method.
Summarization on Deterministic Seismic Response Analysis of Soil Deposits
Authors: Guo Ming Zhu , Zhang Qiang
Published: January 2015

Seismic ground response analysis methods are categorised into linear, equivalent linear and non-linear methods that perform the analysis in the time or the frequency domain.The equivalent linear and the non-linear methods are two main methods of seismic response analysis for soil layers. The Equivalent linear method is the most common soil seismic response of a way to analyze in the current engineering practice. In recent years, the study on method of seismic response analysis of nonlinear soil layers is an important content in research domain of geotechnical earthquake engineering now. In this paper, these two methods’ basic principles are clarified briefly, Their developing courses and actualities are summarized. According to their basic principles and application practices, their merits and shortcomings are pointed out. The reasons why the merits and shortcomings appear are analyzed briefly.
The Optical Properties of Doped Silicon Nanotubes
Authors: Luo Chun Ya , Lan Zhi Gao , Feng Jie , Hu Ming Zhe , Fu Zhen Xun
Published: January 2015

We perform the first-principles calculations within the framework of density functional theory to determine the electronic structure and optical properties of P-doped and B-doped silicon nanotubes. The results indicate that the electronic structure and optical properties of P-doped and B-doped silicon nanotubes are sensitive to the impurity composition. In particular, when doped with P or B, obviously the band gap decreases and the conductivity enhanced, the P-doped and B-doped silicon nanotubes displays a closer band structure and the unit cell volume of doped silicon nanotubes increased than before doping, the change depends on the doping charge and Si-Si bond length dSi-Si. Moreover, the dielectric constant decreases and increased when doped P and B, the optical absorption peak obviously has a blue shift and red shift respectively. The calculated results provide important theoretical guidance for the applications of Uv detector and the solar cell in optical detectors.
Application of TRIZ Contradiction Matrix in Equipment’s Combat Resilience Design
Authors: Ma Sa Sa , Yang Shi Ying , Xu Ying Xin , Zhang Chao Wei
Published: January 2015

Aiming at problems of lack of theoretical research and existing resources, etc., in equipment’s combat resilience design for the chinese military, a new kind of equipment’s combat resilience design theory-TRIZ contradiction maters are used to describe the technical conflict in practical problem, the conflict resolving matrix is used to analysis problem, and the principle to solve the contradiction is given at last. This theory is strongly to solve the contradiction problem. For these reasons, the equipment’s combat resilience design process is proposed in this paper, and then taking the battlefield maintenance of radar phased array antenna as an example, this paper analyses the improvement design method to introduce the design of phased array antenna by using the TRIZ conflict matrix. The results show that, TRIZ conflict matrix can effectively guide the equipment’s combat resilience design, and can indicate the direction for the equipment’s combat resilience design to improve design efficiency.
Study on Processing of a Collophane Reverse Flotation in Yunnan
Authors: Yang Bo Wen , Zhou Ping , Jin Wan Chao
Published: January 2015

Abstract：The phosphate is low silicon carbonate collophane, gangue mainly dolomite. Apply to the reverse flotation technology, determine one-stage roughing and one-stage scavenging reverse flotation test process,Collector with paraffin soap oxidated,Inhibitor use sulfuric acid. By the reverse flotation process contain. When the ore grade is 20.11%,under the flow sheet can research qualified phosphate product with content of 33.95% in concentration and recovery of 62.06%.
Software Design and Implementation in Simulation of Manipulator Control System
Authors: Jin Shi Jia , Yin Fei
Published: January 2015

Manipulator has been widely used in industrial production because it can reduce labor intensity, improve the machining accuracy and reduce the number of dangerous operations manual operation. There are many kinds of control modes for manipulator trajectory. The PLC due to characteristics of low cost, simple structure, repeatable use, flexible programming ,it widely used in the control of the manipulator. This paper focus on the the software design and implementation. Through the simulation of the control system of manipulator, the PLC program design, debugging and running can achieve the expected control purpose and requirements, make the motion trajectory of manipulator in accordance with the relevant provisions. Based on the PLC programming, the manipulator can run in accordance with the requirements of running track.BackgroundWith the progress of science and technology, industrial production automation equipment demand is increasing day by day. Due to the reduction of labor intensity, improve the machining accuracy and less manual intervention operation risk, the manipulator has been more widely used in all walks of life.
The Inhibitor Exploration Test of Collophane Reverse Flotation in Yunnan
Authors: Yang Bo Wen , Zhou Ping , Jin Wan Chao
Published: January 2015

The phosphate is low silicon carbonate collophane, gangue mainly dolomite. determine one-stage roughing and one-stage scavenging reverse flotation test process,the grinding fineness of 92.86% -200 mesh.Collector with paraffin soap oxidated,Three acid of sulfuric acid, hydrochloric acid, nitric acid as an inhibitor for contrast test,With concentration of 10% sulfuric acid 10000 g/t can research qualified phosphate product with content of 33.95% in concentration and recovery of 62.06%.
Application of Pro/Engineer in Mug Product Development and Mould Design
Authors: Chen Feng
Published: January 2015

Pro/E was developed by the American company PTC CAD / CAM software, it is a new generation product modeling system with features as parametric design, three-dimensional solid model, feature-driven and single database. Pro/E software uses object-oriented unified database and parametric modeling technology, which has conceptual design, basic design and detailed design features,and provides excellent platforms for integrated manufacturing molds.Take Mug for example, the process of product modelling and mold design used by Pro/E software was introduced. The mold design cycle , the parting surface, the mold die space and the core was focused. The high efficiency characteristic of plastic mold design used by Pro/E was elaborated.
Composite Controller Design for Rigid-Flexible Coupling Mechanical System
Authors: Liu Shu Qing , Jia Qian , Zhou Hao
Published: January 2015

A dynamic model in singular perturbation form is established for the deformation and vibration of rigid-flexible coupling mechanical system due to the drive force, inertia force and gravity. This model is divided into slow subsystem and fast subsystem. A PD controller is designed for slow subsystem while optimal controller for fast subsystem and a composite controller is developed based on this. The validity of the composite controller is verified through MATLAB simulation with a flexible scissor-like deployable mechanism as an example. The results can be used in control of CNC machine, robot, spatial mechanism etc.
A Classification Model of Identifying Weeds Based on Chaotic Neural Network and the Empirical Mode Decomposition
Authors: Yu Rui , Zhang Shou Ming , Bi Gui Hong , Si Li
Published: January 2015

This paper puts forward a classification method of imitating the human eyes to recognize image as a whole which combined chaotic neural network and the Empirical Mode Decomposition (EMD). The method takes the individual of weeds plant as the research object and utilizes the chaotic neural network, the EMD, Teager energy operator and cluster analysis technology comprehensively. Firstly take the two-dimensional gray image matrix as the chaotic neural network weight matrix directly. Use the chaotic neural network with n neurons expression to iterate and get the one-dimensional output curve. Secondly, make the EMD decomposition for the curve and get the corresponding intrinsic mode function (IMF) curves. Then make the Teager energy transformation for each IMF component and get the average Teager energy. Finally use the fuzzy clustering algorithm to cluster analyze and get the clustering results. It can realize the classification of different categories of weeds through analysis and contrast the results with the original images. The experiment proves the effectiveness of the proposed algorithm for classifying weeds, and it is a universal new method of weeds classification.
A Method to Establish 3-D Finite Element Geological Model Based on DEM Data
Authors: Guo Ming Zhu , Zhao Feng Xian , Wang Ya Kun
Published: January 2015

This paper introduces a methodology for creating geometrically of real terrain based on DEM data, which provided by the international scientific data sharing center.The method is to convert the DEM data in Global Mapper, AutoCAD and other softwares, process batch of data using office software, based on APDL language programming in ANSYS software , so as to realize the real remote sensing data to establish 3-D geological model in finite element software. An example illustrates the capabilities of the proposed methodology in this paper.
Safety Monitoring System Design Based on WIA-PA
Authors: Xu Chun Hui
Published: January 2015

The paper designed a safety monitoring network system which is composed of the wireless sensor network based on the emerging wireless communication technology.Tests indicate that the system runs well with small consumption and good mobility, and the data can be uploaded to host computer for real-time display and record so that it can provide effective help to quickly carry out rescue work.
A Map Matching Algorithm Based on Fuzzy Logic
Authors: Ma Liang
Published: January 2015

First in this paper, we will introduce a map matching algorithm based on fuzzy logic, and how we use it to fuse the navigation data. Then we will introduce a kind of iterative algorithm what we use to optimize the parameters of the map matching algorithm we mentioned before. So we can improve the precision of our map matching algorithm.
Multi-View Registration Based on Triangle Constraint and Global Optimization
Authors: Wang Rong Hua , Zhang Hua , Xu Feng , Yue Li
Published: January 2015

The measurement technology of 3D scanning in automation level is low, its measurement process is not stable, and the measurement error is large. After the principle of binocular structured light measurement was analyzed, match the marked point to multi-view registration based on the relative distance of any two marked point in space is unchanged. A multi-view registration is proposed using triangle constraint and global optimization. The method includes: remove the false matching points in possible matching points by joining triple constraint; after the first registration, use the center of marking points to global optimization through least squares principle method. The realization of the algorithm by use of tools such as VC++ and Open CV demonstrates that this method has the advantage of better restraining the accumulative error, keeping the process stable, and fast and realizing automatic registration.
Decorrelation-Based Data Association Algorithm for Heterogeneous Sensors System
Authors: Kong Yun Bo , Wang Hua Bing , Feng Xin Xi , Lu Chuan Guo , Ke Rong Bo , Chen Guo Sheng
Published: January 2015

A decorrelation-based data association algorithm for heterogeneous sensors system is proposed, which first fusions multiple measurements to estimate a target position using the pseudo linear estimation method, then a decorrelation-based data association model is built and the unscented transform is proposed to compute the mutual covariance between measurements and the pseudo ones. Meanwhile, taking the real-time problem into consideration, when calculating the cross covariance, the minimum skew simplex sample is used to reduce the complexity of the algorithm.
Research of Automatic Drawing Scheduling Network Method Based on Force-Directed
Authors: Wu Jie , Wang Qiu Quan
Published: January 2015

Automatic drawing algorithm has been one of the hotspot in research of drawing. So far there is no completely effective method. Force-directed graph drawing algorithm is based on physics model, makes the drawing problem into force for solving the problem in physics, then into unconstrained optimization for solving the problem in mathematics. Its advantage is based on people familiar with the physical model, and the principle is easy to understand. We can draw large-scale graphics with symmetrical and beautiful appearance through certain set and the improvement. At the advantages of Force-directed algorithm, this paper presents force-directed algorithm can be applied to automatic drawing in scheduling network, and explores the image style in a more intuitive graphical way to show the connection between scheduling network vertices.
Estimation of Optical Amplifiers with Limited Information Based on Optoelectronic Equivalent Model
Authors: Wen Ming
Published: January 2015

This paper investigates the estimation of optical amplifiers based on an optoelectronic equivalent model. In order to improve the estimation performance with the limited information, a linear filter is adopted. The limited information can be treated as a switch that acts in a random manner. As the switch is open, the corresponding output is held at the previous value. The estimation of optical amplifiers taking into account the limited information can give out the better results. The results demonstrate the effectiveness and applicability.