bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research of Wireless Sensor Network System Based on Internet of Things
Authors: Li Li , Hu Zhi Yu
Published: August 2014

Along with the once again leap development of science and technology, wireless sensor network technology by a great number of agency predicted to be the core technology of power to change the world, has become the one of the important research field both at home and abroad, has wide application background. It is in special scenario application especially, due to the special restrictions on target area, making the advantages of wireless sensor network system well. In this article, through the research of wireless sensor network system, key technologies and difficulties in the design of the Internet of things system for wireless sensor network solution, and describes in detail the system each function module in detail.
Similarity Measure of Vague Set Based on Uncertainty
Authors: Zhang Kun , Chen Mei Yi , Li Zhuang
Published: August 2014

According to the experimental analysis, this work found out the defect of the formula for similarity measure between current Vague values, and redefined the similarity measure between Vague values. Therefore, a new formula subject to the new definition was put forward according to data mining and uncertainty of Vague value.
Rapid Classification of Pork NIR Speca Using PCA and FLVQ
Authors: Wu Xiao Hong , Qiu Sheng Wei , Li Xiang , Wu Bin , Li Min , Sun Jun
Published: August 2014

Pork storage time is relevant to its freshness which influences pork quality. To achieve the rapid and effective discrimination of pork storage time, near infrared spectroscopy was used to collect the near infrared reflectance (NIR) spectra of pork in different storage time. The high-dimensional NIR spectra was firstly compressed by principal component analysis (PCA) and then classified by fuzzy learning vector quantization (FLVQ). PCA plus FLVQ is a completely unsupervised learning algorithm which finds hidden patterns in unlabeled data. Experimental results showed that PCA plus FLVQ could classify pork NIR spectra effectively.
Manufacturing Enterprise Suppliers Selection Based on Improved TOPSIS Method
Authors: Liu Yao , Zhang Pei Lin , Liu Hong Gang
Published: August 2014

Supplier selection of supply chain manufacturing is particularly important under the environment of Supply Chain Integration. This paper explained basic ideas of suppliers selection firstly, and then proposed improved TOPSIS method, elaborated four steps of this method, finally analysis with examples of B company, a large integrated industrial company, which main products are large crane parts. The conclusion has some reference value for supplier selection in manufacturing.
Research on Driving Comfort Evaluation of Lower Limb Based on Muscular Forces
Authors: Li Zhuo , Zhao Meng Yang , Zhou Liang
Published: August 2014

Driving comfort is one of the most important indexes for automobile comfort evaluation. The joint torque calculation model of the lower limb in driving posture is established in the presented work firstly. The relationship between cab layout parameters and the joint torque can be obtained through dynamical simulation in the MATLAB by employing Kane method. A new method based on muscular forces is proposed to evaluate the automobile comfortableness. The force of each muscle can be obtained by employing static optimization algorithm of inverse dynamics. The impact of cab layout parameters , joint torque and the muscular forces on driving comfort and the relationship between them can be found through the analysis. As an reference, these parameters can be used to optimize the cab and offer an important support for its optimization.
Study on Helical Cylindrical Spring and Presentment of a New Design Method
Authors: Li Wan Xia , Xu Yang Kun , Cai Jing , Zhang Chen Chen , Ke Jian Feng
Published: August 2014

Studied the main theory about helical cylindrical spring design, based on the existing theory,found the parameters that affect helical spring's stiffness, size, stroke, and also how much they effect the parameters. Draw the curve which can be a reference for helical cylindrical spring design, put forward a method of cylindrical helical spring design, which is according to the installation dimensions and working stroke and applicable to the design of cylindrical helical spring when is given workspace and stroke. Provided a new reference for the design of cylindrical helical spring, with important significance to engineering design.
Numerical Study of CFRP-Bonded Pressure Pipes Subject to Impact Load
Authors: Zhao Yang , Wang Zhen Yu , He Zhi Guo
Published: August 2014

A numerical approach is carried out to investigate the dynamic behavior of the CFRP strengthened pressure pipes subjected to impact load. In the FE analyses, Johnson-cook model is used to simulate metal subjected to large plastic strains and high strain rates, the fluid and pipe interaction is modeled by the surface-based fluid cavity to include the coupling effect between the deformation of the pipe and the internal pressure. Besides, the Hashin damage model is used to predict the damage of CFRP. The objectives of the numerical simulations are to capture the measured forming and crash history of the CFRP strengthened pressure pipes and gain an insight into the dynamic behavior of CFRP strengthened pressure pipes subject to impact load. The effects of internal pressure and the thickness of the CFRP are investigated, providing a detailed understanding of parameter sensitivity.
Under Pressure Compensation for Wheel Radius Based on Wheel Speed
Authors: Gao Hui En , Chu Liang , Chen Jian , Li Wen Hui
Published: August 2014

Tire under-pressure will increase vehicle’s rolling resistance, additional fuel consumption and possibility of tire wear, which will magnify the possibility of a flat tire when vehicle drives at a high speed. In addition, an under-pressure tire will cause a smaller wheel radius, which influences wheel speed calculation in Anti-lock Braking System (ABS) and reduces the control robustness. In this paper, an under pressure compensation algorithm for wheel radius based on ABS wheel speed is proposed, which can improve the accuracy of ABS control and indirectly give early warning of a single under-pressure tire as well. Finally it has been validated by vehicle experiments.
Investigation of Size Effect on Micro Hardness of Machined Surface in Micro Cutting
Authors: Zhang Tao , Shi Zhen Yu , Yan Bing , Qi Hou Jun
Published: August 2014

Micro cutting is a promising way for manufacturing micro parts, especially micro three dimension parts. Micro hardness is an important character to evaluate surface integrity of machined surface. Micro cutting is different from macro cutting due to size effect of specific cutting energy because of the influence of the ratio of uncut chip thickness to cutting edge radius. A group of micro cutting experiments were conducted to investigate the cutting parameters on the micro hardness of machined surface. The micro hardness of machines surface decreases with the ratio of uncut chip thickness to cutting edge radius first, and then increase when the uncut chip thickness is smaller than the cutting edge radius. The micro hardness shows size effect due to the machined surface compressed twice with the round cutting edge. The micro hardness decreases with the distance increasing far away from the machined surface.
The EBOM of Chemical Tower Based on UG
Authors: Zhang Jun Cai , Chen Qing Guo
Published: August 2014

In UG(Unigraphics) environment, computer aided design on Bill of Materials (BOM) for chemical towel is developed using the development tools of VB. By depth traverse to the assembly structure tree,part properties are extracted from the parts information library in the tower assembly. These information are saved to the BOM management library, to generate the Engineering BOM(EBOM) view. The application module is the base for the further process planning and manufacturing.
Research on Vibration Drilling the Inclined Hole
Authors: Zhang Peng , Guo Xing Yu , Guan Zhi Guang
Published: August 2014

Aim to the difficult problem of the inclined hole machining, the vibration drilling method is analysed and adopted. The experiment of the 60°inclined hole drilling on high-temperature alloy was performed, and the notable effects were obtained. It can be draw from the results that the vibration drilling method break the limit of the jig for the inclined hole driling. The vibration drilling the inclined hole has became the new path.
The Study on Maintainability Design of the Air Bus A380
Authors: Zhao Mao Tai , Song Wen Qian
Published: August 2014

The maintainability of aircraft has a direct relationship with the reliability, availability, security and economy of the airplane and its components. From adopting the new composite material, innovative self-test system and the close cooperation with airlines, airports and airworthiness institutions, the airbus A380 will ensure its better maintainability. This paper intends to discuss the developing and designing direction of the civil aircrafts’ maintainability in expectation of marking some active contribution to the industry of large aircrafts in China.
Aerodynamic Drag Reduction of SUV Based on Underbody Cover Board
Authors: Wang Jing Yu , Wang Bao Yu , Hu Xing Jun , Liao Lei
Published: August 2014

The principles and method of computational fluid dynamics were applied to numerical simulate the external flow field about the SUV model. The hybrid mesh of tetrahedral and triangular prismatic as well as the turbulence model of Realizable k-ε was adopted to study the flow field of SUV of flat underground. Then the SUV of complex underground was simulated with the same mesh strategy and boundary condition. The aerodynamic drag coefficient of latter was bigger than former. That illuminated the complex underground has affect to aerodynamic performance of vehicle. The wind tunnel test validated the veracity of numerical simulation. Based on that, the underground cover board was appended; the aerodynamic drag coefficient was depressed. The velocity and pressure distribution and flow line were achieved. The conclusions provide theoretical reference for the further study of aerodynamic drag reduction of complex underground.
Study on the Preparation Technology of Fixed Abrasive Polishing Pad in Chemical Mechanical Polishing
Authors: Liu Zhi Xiang , Yao Jian Guo , Fan Song Zhan , Su Jian Xiu
Published: August 2014

According to the shortcomings of the traditional free abrasive chemical mechanical polishing (CMP), in recent years, the fixed abrasive chemical mechanical polishing (FA-CMP) technology is proposed. It is a new planarization technology developed on the basis of the traditional CMP. Pad is an important and dispensable part in FA-CMP. The cost and quality of FA-CMP pad are determined by the preparation technology. In order to study the FA-CMP pad of the low cost and high quality, in this paper, by reading a lot of literature, 5 kinds of preparation technology of FA-CMP pad are analyzed. Study results will provide some reference for further designing and manufacturing the FA-CMP pad.
Design of Drawer-Combined Condiment Container
Authors: Yuan Yan , Cao Le
Published: August 2014

A drawer-combined condiment container was designed, and the design methods and steps were illustrated from four aspects, including the structure and function, material selection, dimensioning, modeling and decoration. With the integrated storage and independent sealing of different types of condiment, as well as the pickup of improved fluid condiment, it is characterized by cleanliness, convenience in application, space-saving and reusable features when compared to the like product. Therefore, it is of application and promotion value in the packing container design and related industries.
Parameteric Design of the Hydraulic Scissor Lift Platform Based on Secondary Development of Pro / Toolkit
Authors: Li Xin Xin , Wang Ren Ren , Sun Lei Bo
Published: August 2014

This article introduce the method of secondary development of Pro / E, discusses the steps of Pro / Toolkit secondary development, and puts a hydraulic scissor lift platform as an example, Pro / E wildfire 4.0 as a software support platform, VC + +6.0 as an integrated development environment, through Pro / toolkit interface technology to achieve the secondary development of Pro / E.
Effect of Modified Atmosphere Packaging on Hypomesus Olidus Fresh Quality
Authors: Huang Qiu Lan , Cui Lin Lin , Li Yong Kun , Gao Jing , Lin Na , Chang Jia Tong , Wang Dan Dan , Zhang Qun Li
Published: August 2014

Effect of modified atmosphere packaging on the Hypomesus Olidus fresh quality under refrigerated (0±1°C) was investigated. By measuring sensory characteristics, pH, rate of juice leakage, TVB-N value, the effect of different gas mixtures were evaluated. The results indicated that MAP prevented the spoilage and the bacterial growth of sample was inhibited, and MAP was effective in extending shelf life of Hypomesus Olidus.
Simulation on Rationalization Process Scheduling in Large-Scale Civil Engineering
Authors: Liu Mao
Published: August 2014

In the construction process of large-scale civil engineering and architecture, how to realize rational scheduling is a key problem need to be solved. This paper studies the construction process of the large-scale Civil Engineering decoration companies, particularly the construction with parallel multiple sets of team and multi-project. To solve the problem, the paper designs a special scheduling algorithm and carries out simulation. The scheduling algorithm shorts the duration of construction and improves enterprise efficiency.
Numerical Simulation of Tire Hydroplaning and its Influencing Factors
Authors: Zhou Hai Chao , Wang Guo Lin , Yang Jian , Xue Kai Xin
Published: August 2014

Tire hydroplaning has become a direct inducement of wet-weather road accidents. The model of hydroplaning of the deformed rib tire with load was built with the help of CFD (Computational Fluid Dynamics) technology. The three-dimensional SST coupled with the Volume of Fluid (VOF) model was applied to numerically simulate the air-water two phase flow with free surface in tire hydroplaning. Based on the model of hydroplaning, the influence of water film and water velocity on tire hydroplaning were analyzed. Analysis shows that tire has a high pressure induced by water impact in the front of footprint; water flow is inclined to tire sidewall. The water velocity in different circumferential pattern is difference. There is an apparent impact of water film thickness and velocity on tire hydrodynamic pressure and the high pressure zone. Therefore, the results of this paper can give recommendations on drivers in the rainy weather.
Dynamic Response of the Surface Building under the Blasting Seismic Waves
Authors: Xu Yu Shan , Sun Qiang , Shi Dong Xi , Zhang Xue Jiao , Hu Yi Feng , Zhu Lin
Published: August 2014

This article selects relatively common residential area as the prototype and uses finite element analysis software ANSYS/LS-DYNA to establish a framework to simplify the model. Four scene measured vibration velocity are loaded on the structural model. The dynamic response under four different peaks blasting vibration velocity response is simulated, and the simulation results are summarized.
Study on the Stability of Tunnel with Large Cross Section Based on the Ultimate Strength Reduction Method
Authors: Zhou Hui Chao , Liu Rui Jun
Published: August 2014

The stability and the instability form of tunnel surrounding rock have always been hotspot and difficulty problems in underground engineering. We combined the finite element method with the strength reduction method to study the stability of the surrounding rock in tunnel with large cross section. To study the vault settlement, ground settlement and some feature points’ displacement, we used ADINA software to establish a simulation model, from which we can get the relationship between the strength reduction factor and data such as the maximum principal stress and the maximum plastic strain. Also, with analyzing the stability of tunnel surrounding rock, we defined the safety coefficient as 2.5 at last. Then, the tunnel’s weak position during the excavation projects and corresponding strengthening measures can be found through analyzing tunnel stress condition.
Stability Analysis of Soil Slope under Strong Earthquake
Authors: Tao Tie Jun , Chi En An , Zhao Ming Sheng , Kang Qiang
Published: August 2014

Based on the finite element model of slope, the stability of sand slope are studied. The results show that The pore water pressure shows increase trend, while the excess pore water pressure shows decreasing trend with the increase of the water depth. With the increase of the the water depth, safety factor of slope calculated by quasi static reduces to 0.193 from 2.366, which reduces 12.26times. The minimum safety factor calculated by dynamic time history is less than that by quasi static method, which shows that there is some limitations of the quasi static method.Without considering the groundwater, the destruction of slope is mainly the circular shearing damage through the slope toe, while the destruction is not yet through the slope toe, but from a point on the front of slope.
Research on Spatially Statically Indeterminate Parallel Force System of Rigid-Flexible Coupling Structures
Authors: Wang Xin , Ming Shu Jun , Wu Di , Liang You Guo
Published: August 2014

In the process of large equipments lifting, when the object is lifted by four or more cranes collaboratively, it is under the action of the spatially statically indeterminate parallel force system. Based on the state geometric change characteristics of the multi-crane system which is a rigid-flexible coupling structure, we creat the deformation coordination equation and propose a method to solve the problem of the spatially statically indeterminate parallel force system for the rigid-flexible coupling structure, which can be widely applied in any lifting case. And the effectiveness of this method is verified by the comparative analysis with FEM.
Vertical and Horizontal Seismic Response Analyses of Long-Span and Single-Layer Spherical Lattice Shell Structure
Authors: He Jin Sheng , Wang She Liang
Published: August 2014

The dynamic characteristics of 80 m single-layer spherical lattice shell structure are analyzed to control its vibration under seismic load. Through the response spectrum curve of current design specification, the analyses for the vertical and horizontal seismic responses of the single-layer spherical lattice shell structure are made by CQC, and the displacement response of the nodes and internal force of the rods unit are calculated respectively. The calculation results show that the vertical and horizontal seismic responses of the long-span lattice shell structure are in great difference, and should be performed in vibration control at the same time, which could provide certain references for the seismic design and vibration control of single-layer spherical lattice shell structure.
The Design of Driver’s Seat Vibration System of the Road Roller Based on MATLAB
Authors: Xia Jing Jing , Xu Jing Yu , Chen Yong
Published: August 2014

This project mainly studies the structure composition and the working principle of the seat vibration system of the roller . On this basis, dynamic equations are obtained according to the stress analysis of the simplified system of the seat vibration system of the roller, and then with the simulink module of MATLAB software, a simulation model is established as to the driver's seat system.Through the model simulation, the roller’s vibration of the the driver seat system is analysed,then based on the analysis, the optimization design can be done. Finally, through the research of this topic, the ride comfort of roller is been improved.
Integrated Design on CAD/CAM/CAPP/CNC for Cam Mechanism
Authors: Gao Hui Qin
Published: August 2014

In Pro/E environment, it gived the details about parameteric designs on cam contour curve. By 3D parameterized modeling, motion simulation and analysis of cam, the process planning and tool travel-paths generating were given. G-Codes program was automatically generated too. At last, the integrated design on CAM/CAPP/CNC for cam components is realized.
Finite Element Analysis and Parameter Optimization for Mirror EDM without Mixed-Powder
Authors: Sui Xiu Wu , Fan Bo Xue , Zhou Duo , Liu Guan Ping , Hu Teng
Published: August 2014

By analytical and finite element analysis method, this paper analyzes the various factors on the impact of EDM surface roughness. Put forward in the process of EDM according to the coarse, medium and fine, step by step to change the order of the processing conditions, and in turn increase the momentum of the swinging electrode EDM mirror machining method. Analysis and calculate the feeding and machining allowance of each process conditions. Experiments show that in the mixed powder fluid, not replace the electrodes and processed work pieces of 45 # steel, surface roughness of work piece reached Ra0.02μm.
Pulsating Flow Induced Vibration in the Seal System
Authors: Zhang Nan
Published: August 2014

The oscillating flow is an important factor affecting the performance of the rotor–seal system. From the point of view of flow induced vibration, the nonlinear models of the rotor-seal system are presented for the analysis of the self-excited vibration, which is induced by interaction between the unstable seal fluid flow and the vibrating rotor. The nonlinear characteristics of flow induced vibration in the rotor-seal system are analyzed, and the nonlinear phenomena in the unbalanced rotor-seal system are investigated using the nonlinear model with the flow induced vibration.
Theoretical Error Analysis of the CNC Lens Cutting Machine
Authors: Chen Can , Li Run Juan
Published: August 2014

In this paper, doing the theoretical error research of CNC lens cutting machine by the method of mathematical modeling in the theory of multi-body system, It reveals the cause of low of the law of the theoretical error of five-axis CNC machine tools for each degree of freedom, proves designers with the theoretical ideas, certain guiding significance for the development of CNC machine.CNC glass cutting function to adapt to the dynamic changes of the resin lens surface shape, in a very short production cycle can produce a low cost, high quality and different outline of individualized product, is the direction of the lens processing system, CNC glass cutting machine, the three-dimensional model is shown in figure 1: two rotary motion to the X axis swing around and around the Z axis rotation, decorated with Y to linear motion on the worktable, spindle to produce X and Z to translation. According to the literature, as a result of multi-body system theory of complex mechanical system has strong generalization ability and the unique way of system description, can fully consider the various factors influencing the system and the coupling relationship between each other, and therefore is widely used in error modeling of complex mechanical system movement
Kinematic Calibration of Hybrid Machine Tool for Marine Propellers Processing
Authors: Ren Yue Ying , Wang Rui , Zhong Shi Sheng , Wen Jian Min
Published: August 2014

To increase the precision and the processing efficiency of large-scale marine propeller, the method of twin-tool symmetrical processing is proposed based on hybrid mechanism. With the introduction of mechanism compositions of the machine tool, the calibration method of the structural parameters is researched. The serial and parallel mechanisms of the hybrid mechanism are calibrated separately for the coupled motion. Their structural error models are established and identification methods of structural parameters are analyzed. And nonlinear equations are solved by using the Levenberg-Marquardt optimization algorithm to obtain the structural parameters. Finally, in ADAMS, hybrid machine tool model with structural parameter errors is established. And the pose errors of the tool are acquired in kinematics simulation. After that, the structural parameters errors of the machine tool are compensated by calibrating. Then, the error models and the parameter identification methods are proved to be accurate. Meanwhile, the correctness and effectiveness of the calibration method is proved.
Deep-Hole Drilling Negative Pressure Device Injection Process Simulation Analysis Based on Fluent
Authors: Chen Zhen Ya , Shen Xing Quan , Xin Zhi Jie
Published: August 2014

In the process of DF system machining the small diameter deep hole, the working parameters of negative pressure device has a great influence, including injection coefficient, chip removal of cross-sectional area ratio, discharge pressure, negative pressure number, etc. Injection coefficient has the non-linear proportional relationship with chip removal of cross-sectional area ratio, with the increasing incidence of negative pressure discharge pressure increases, as well as, increasing negative pressure number to improve chip removal have a good effect. Movement patterns of cutting fluid is simulated, energy loss of cutting fluid in the flow is studied, finding curved edge nozzle has better negative effects than straight edge nozzle. The effect of negative pressure pumping crumbs is analyzed, the injection process of negative pressure device is simulated, and the form of the fluid motion in negative pressure nozzle is got based on Fluent, which have a good guide for the actual production and machining.
Rapid Design of Injection Molding of Plastic Buckle
Authors: Li Ren Xing , Wang Ze , Su Dong Mei , Ye Xia , Xu Ya Ni , Sun Zhi Juan , Li Xiu Lian
Published: August 2014

In order to achieve higher speed and better efficiency of the plastic buckle molding, Imageware, the reverse design software, was adopted in this paper to process the point cloud data of the plastic buckle, mesh feature lines and reconstruct the surface,and then the reconstructed plastic buckle model was imported into UG and saved in STL format with the powerful surface repair function of UG to suture discontinuous surfaces. Mold Wizards of UG, the mold design module, was used to create mold assembly model, design parting surface, generate three-dimensional solid model of molding parts according to STL format saved previously and eventually the injection-molded plastic buckle was analyzed with Moldflow / MPI. As was indicated, the optimized design parameters tally with the experimental results basically.
Dynamic Scheduling System of Human-Computer Interaction for Steelmaking-Continuous Casting Process Based on Gantt Chart and Optimization Model
Authors: Zhou Yu Lin , Zhang Jin Cong , Wang Xin , Yu Sheng Ping
Published: August 2014

With the development of the hardware in Chinese iron industry, scheduling technology is becoming key obstacles that hold back the further development in iron enterprise. And the scheduling theory about the process of steelmaking-continuous casting can’t fit the actual production. To improve this situation, we manage to develop the system the combine the editable Gantt chart and optimization models. On one hand, this system can use Gantt chart to show dispatcher real-time schedule and allow dispatcher reschedule on Gantt chart. On the other hand, the system can detect the change dispatcher made and use the optimization model to complete the whole schedule. In a word, this system takes advantage of the scheduling ability of dispatcher and the high speed calculation of computer to reschedule efficiently.
Optimization Design of Limestone Conveyor System in Circulating Fluidized Bed Boiler
Authors: Liang Yu Wen , Song Hui , Li Yuan Xin
Published: August 2014

The qualities of the limestone conveyor system running directly affect the efficiency of circulating fluidized bed boiler combustion. Aiming at the problems of limestone conveyor system, this paper optimizes the design of the control system and the ring limestone fluidized bed boiler combustion control system networking, the use of configuration technology for real-time data control system to monitor and implement manual and automatic switching function. While improving the delivery system and improve the combustion efficiency of the boiler. For the circulating fluidized bed boiler combustion system provides a reference value.
The Research of System Design on a Turbine Based on CATIA
Authors: Xu Dong Dong , Wang Tong
Published: August 2014

With the rapid development of science and technology, modern design has become increasingly complex, with the factors needed to be considered more various, find the optimal solution to solve problems, which is the real meaning of product design. In this paper, by analyzing the domestic and foreign research present situation of the modern theory of the modular design, according to the characteristics of complex product system, it will be introduced to the concept design of complex product system modular design, proposed in view of the function of the turbine division method, based on CATIA software research and development of the system design of a turbine, that can effectively shorten the development time, reduce development costs, to lay a good foundation for its innovation, having great theoretical and practical significance for turbine technology development.
Computerized Simulation on Energy Saving Characteristics of Variable Displacement of Double Action Vane Pump
Authors: Zhang Pan , Chen Lei
Published: August 2014

As a substantial power loss, the high speed automotive hydraulic power steering outputs normally exceeds the system actual demands, which is one of the practical difficulties of that kind of power steering. A new type of variable displacement of double-action vane pump based on the study of a patent is described in this issue, which could be applied in the auto steering pump. Considering of the severe energy cost in existing hydraulic power steering system, the recommended pump could compensate the rate. Based on the pump principle, the interior structure design of the pump could be improved to achieve saving energy. A rational pump structure is designed for lower energy lost according to the research on the characteristics of the variable mechanism under various speed, working conditions of the improved vane pump structure and the energy saving theory. Compared to the traditional double-action vane pump, the new vane could not only keep the advantages such as balance of radial suffer force for rotor but also change the displacement automatically according to different speeds. The transformation regulation applying on the variable mechanism floating block under different rotating speeds is analyzed derived according to the engineering dynamics principles and the dynamics model of variable framework is set up in the same way. Some MATLAB simulations are utilized to show a theoretical feasibility proof of the project.
Study on Discharge Parameters of Surface Strengthening with Powder Mixed Near Dry EDM for H13 Steel
Authors: Wang Jing Ling , Yang Hui , Li Min
Published: August 2014

Surface strengthening for H13 steel with powder mixed near dry EDM, research the effect of different discharge parameters on the microstructure and hardness of strengthened layer .The results show that the effect of pulse interval on microstructure and micro hardness is not obvious, the influence of the pulse width less than the peak current. As the increasing of peak current, strengthening layer surface quality get better, when the peak current reach to 14A , preferable microstructure of strengthening layer can be obtained.
Finite Element Analysis on the Redistribution of Reaction at Support
Authors: Chen Mu , Xue Jiang Hong , Gan Neng
Published: August 2014

We use the finite element software Midas FEA to set up space entity model, and discuss various factors including the stiffness of bearing, counteracting force of adjacent beam, the influence of the stiffness of bridge pier on reaction at support. In the practical engineering. Coupling of shear lag, stiffness of beam, bending-torsional coupling and partial load can also affect the redistribution of reaction at support. Through the simulation of the finite element software, we check the support of a railway bridge in Guangzhou city. In the end we found that the stiffness of beam can make the middle support have a tendency to increase. If we take all the factors into account, the force of the middle support will be greater than on the both ends of bearing and the force on the both ends of bearing will be approximately equal.
Study on the Identification Method of Tool Wear State Based on SLLE and SVM in NC Machining
Authors: Pan Rui , Li Zheng Qiang , Nie Peng
Published: August 2014

Aiming at the nonlinear features of Acoustic Emission reflecting the tool wear state, an identification method of tool wear state is proposed based on SLLE and lib-SVM. SLLE can overcome the problems of redundant parameters of the original nonlinear algorithms, low convergence rate, and tiny local areas in the reflecting process, etc. It can realize the reflecting from the high-dimensional data points into a global low dimensional coordinate system. It can also maintain the original topological structures of the lowered dimensional data. By using KC9125 cutting tools to cut 40CrNiMoA alloy steel to collect the acoustic signals, the collected data is vector space reconstructed. Then the high-dimensional space data are reflected into low-dimensional space data by means of SLLE in order to extract the features of the tool wear state. And LIB-SVM classification machine is used to identify and classify the tool wear state. The result shows: this method can accurately identify the tool wear state, and should be extended to a larger prevalence.
The Establishment of DEM and its Application in Road Surveying and Designing
Authors: Liu Shao Hua , Zhang Jia Hua
Published: August 2014

It is so valuable that models merging of Delaunay triangulation are used widely in many applications. This paper researches the algorithm of models merging for Delaunay triangulation. A method for obtaining merged intersection lines and a algorithm for searching fast triangles in the extent of merging intersection lines are proposed, and whole process of models merging are expatiated detailedly. The algorithm is tested in experiments, and the result of experiment shows that this algorithm is very efficient.
Analysis of the Reasons of Driving Wandering and Research of Solution Methods
Authors: Xu Xuan Jiong , Guo Xue Xun
Published: August 2014

Through research of vehicle dynamic feature, analysis and research of the problem of driving wandering by user retroactions, the article put forward some test and evaluation methods of driving wandering. And the article is discussed about main reasons and solutions of driving wandering in-depth.
Waterproofing and Drainage System Design of YUN-GUI Express Railway Cutting Sub-Grade in Expansive Soil Area
Authors: Yang Xiao , Yang Guo Lin
Published: August 2014

According to the character and generation mechanism of railway cutting sub-grade diseases, following the needs of YUN-GUI express railway construction, based on the results of laboratory and field test of expansive soil engineering characteristics, developed new waterproof material, designed waterproofing and drainage system of cutting sub-grade, and full-scale dynamic model test was carrying out, a cycle load with 4Hz frequency and 4000 thousand times excitation was imposed on the sub-grade model under three kinds of working condition (dry, raining and underground water rising). The results indicate that: no cracks appeared on the surface of semi-rigid waterproof layer, its durability is good. Waterproofing and drainage system of cutting sub-grade works well under combined action of long term cycle load and complicated environment. Research results possess important engineering reference value.
Modeling and Optimizing of Random Gyro Drift Based on AR and GP
Authors: Lv Lin , Quan Wei
Published: August 2014

Gyroscope is the key component in an Inertial Navigation System (INS). It depends on the precision of the INS. The nonlinear random drift error model based on autoregressive (AR) and genetic programming (GP) was established. The linear model is established based on AR technique. After that, the nonlinear model is built based on GP technique. The result indicates that the square error of the random gyro drift is reduced by 74.5%. The hybrid modeling method can effectively compensate the random gyro drift and improve the stability of the system.
Visual Servo Robotic Arm Control System Based on LabVIEW
Authors: Liu Yun Hong , Yu Hao Yang
Published: August 2014

A robotic arm control system based on LabVIEW and FPGA is presented in this paper. It is built with USB camera, PC, FPGA development board and 4-DOF robotic arm. In a way with high performance-price ratio and strong expandability, the system achieves a series of functions: capturing and processing images, identifying the target, planning the path, driving the actuators, and finally, grasping the target. Users can not only monitor the situation of the workbench, but also real-timely grasp the object in the area.
Kinematics Simulation Analysis of a Kind of Pedal Rehabilitation Robot
Authors: Wang Wen Long , Wang Ji Rong
Published: August 2014

This paper describes the design of the gait mechanism of pedal lower limb rehabilitation robot based on people’s heel movement trajectory curve in the normal walking. It is established the kinematics mathematical model of a pedal lower limbs rehabilitation robot and the simplified three-dimensional model with Pro/e software, then it is simulated kinematics using ADAMS software. The simulation result is shown that this pedal lower limbs rehabilitation robot can achieve the expected rehabilitation exercise and run smoothly. Kinematics analysis and simulation of pedal rehabilitation robot is provided the necessary theoretical basis and parameters for the study of lower limb rehabilitation machinery.
Analysis on the Influence Factors of Smart Meters Reliability Prediction
Authors: Ji Jing , Hou Xing Zhe , Tian Juan , Wang Yi , Zhao Fu Ping , Cheng Xiao Ming
Published: August 2014

Currently, parts stress method is the most suitable and practical method for smart meters reliability prediction. This paper establishes the components’ failure rate model, selects parameters based on SR-332 handbook, analyzes the major factors which affect the components and meters reliability prediction results, and proposes the improvement measure to enhance the reliability of smart meters.
Research on Application of Controlling Variables in Computer Color Matching for Textile Dyeing
Authors: Wang Dong Mei , Zhang Bing Sen , Yan Min , Hong Dan Feng
Published: August 2014

In order to get the relationship between the concentration of textile dyeing and the three stimulus values, we analyze the experimental data by controlling variables, and set up a linear model between the concentration of textile dyeing and the three stimulus values. Match the dye weight concentration by this model and the three stimulus values of a sample piece of cloth, and then compare the real value of the dye weight concentration with the predictive one. The experimental results show that the concentration of textile dyeing by controlling the dye weight concentration is closed to the true values. So this model can meet actual production requirements.
Application of CAN Bus and the Layered A* Algorithm in the Parking Guidance System
Authors: Cheng Li Ping , Yan Bo , Tan Yong Hai
Published: August 2014

Most parking guidance system is not perfect, in an unknown and complex parking lot, the most urgent problem to the driver is how to find a parking space and find his car from the parking space quickly. In order to solve this problem, in virtue of the improved layered A* algorithm, system fast calculates the optimal path information which is from the entrance to each parking space and from each parking space to the export. Compared with using A* algorithm directly, the calculation time is shorten, the number of traversal nodes is reduced. At the same time, it adopts the integration design idea in the design of hardware and software, and uses international popular CAN to complete the design of network nodes in the parking guidance system, in which the monitoring interface is designed, the parking space information and gateway vehicle information are collected, the optimal path information are displayed. As integration design method was adopted, the design contents are simplified, the development hours are shortened, and the CAN intelligent nodes have a good extendibility and portability. This is the foundation for the expansion of parking lot In the future.
Optimization and Control of Ladle Operation for Special Steel Plants
Authors: Wang Bin , Wang Bao , Mu Yan Qing , Liu Qing , Lu Xin Chun
Published: August 2014

Ladle operation for steel plant directly affects the production operation to the site, through artificial means of a track record of special steel ladle operation process analysis, on this basis, considering the "product structure" on the operation of the ladle on the rational calculation of the number of ladle has been improved. Match for different machine in case of furnace ladle operation, classification discussed the number of its ladle operation control strategy.
Parameter Optimization of Cartesian Serial-Parallel Manipulator with Redundant Actuation Based on BP Neural Networks
Authors: Luo Jian Guo , He Mao Yan
Published: August 2014

Design the redundant driving structure based on a new type of universal Cartesian serial-parallel manipulator, structural parameters are optimized through objective function, relative workspace and accuracy of motion included as the main index, four BP neural networks are constructed with reiterative exercise carried out, transferred function and input parameters through the constructed and exercised neural networks, analysis and approach computation completed with pretty optimal data suggested.
Studies on Bilateral Impedance Control Method for Teleoperation Robot
Authors: Ying Min , Gao Xin , Han Si Yu , Sun Han Xu , Jia Qing Xuan
Published: August 2014

The bilateral PD control method for teleoperation robot has some defects, such as poor tracking performance and force feedback performance. This paper, based on traditional bilateral PD control method, adds an impedance controller to the master and the slave, and deduces the stability condition according to the absolute stability criterion. The simulation shows that this method can assure the system stability and improve tracking performance and force feedback performance.
Condition Analysis of Steam Turbine Digital Electro-Hydraulic Control System Based on Data Fusion
Authors: Wang Zhen He
Published: August 2014

Aiming at the problem that the system of DEH regulation system is complex and difficult to analyze its condition, a method based on characteristic extraction and information fusion is proposed. By making RCM analysis, the indexes for quantitative risk evaluation of fault modes are determined, and the fuzzy rule base for risk evaluation is built. Using fuzzy inference, the system fault modes are ranked according to their risk level. Then, the condition characteristic parameters are extracted according to the pivot fault modes. Using the extracted characteristic parameters, an information fusion method based on evidence theory is put forward to evaluate the system’s condition. It is shown by the instance that this method is feasible and effective and the condition analysis results can be used as a support for next maintenance decisions.
The Braking Spray System of Heavy Truck Based on PLC Control
Authors: Song Zuo Jun
Published: August 2014

At present, the switch with manual control is generally used in the brake cooling spray system of heavy truck, but the switching time is difficult to be determined by drivers. PLC is suitable to be the controller for the braking spray system of heavy truck, because of its advantages such as high stability, strong anti-interference ability and easy maintenance etc.. In this paper, it’s introduced that the composition, the working principle and function of the braking spray system based on PLC.
Simulation Analysis and Study of Energy Control Strategy for an Extended-Range Electric Vehicle
Authors: Niu Ji Gao , Xu Chun Hua
Published: August 2014

The basic configuration and operation modes of the series extended-range electric vehicle were analyzed and a new method of engine choice and fuel economy evaluation was proposed. A co-simulation platform is set up with Cruise and Matlab/Simulink to evaluate the rule-based engine on-off and optimal operation line control strategies. The simulation results with typical driving cycles illustrate that: firstly, the engine on-off control strategy makes engine and generator operate on their best efficiency points, and its fuel economy is better than optimal operation line control strategy; secondly, when the optimal operation line control strategy is adopted in Extended-Range Mode, the engine downsizing will be beneficial and the extended-range electric vehicle (E-REV) will achieve a better fuel economy and control effect.
Feedforward and Feedback Optimal Control of Autonomous Profiling Monitoring Underwater Vehicle with Disturbance
Authors: Mu Hua , Yuan Jian
Published: August 2014

The optimal control of autonomous profiling monitoring underwater vehicle (APMUV) is investigated. Firstly, dynamics equations in vertical plane with disturbances are constructed, and the equations are converted into a linear system by feedback linearization method and then feedforward and feedback optimal control (FFOC) law is designed for the linear system. To solve the unpractical problem of the control law, we construct a disturbance observer to observe the system states to make a quick convergance of the observed system states. Numerical simulations show the effectiveness of the control scheme
Design and Simulation of the Robot Flexible Roller Hemming System
Authors: Wan Zi Gang
Published: August 2014

The roller hemming system could be verified before it is put into operation by virtual manufacturing technology. This paper analyses roller hemming process, establish roller hemming system 3D models, include roller hemming tool system, roller hemming fixtures system and roller hemming robot. Finally verify the reasonableness of roller hemming system based on DELMIA.
Aluminum-Copper Bilayers Thin Films Deposited at Room Temperature by RF Magnetron Sputtering
Authors: Abdul Halim Zulhelmi Alif , Mat Yajid Muhamad Azizi , Rosli Zulkifli Mohd , M. Ali Riyaz Ahmad
Published: August 2014

In this work, the effects of room temperature deposition on the structural properties of Al-Cu bilayers thin films were investigated. The bilayers were sputter deposited by RF magnetron sputtering on Si {100} wafers without substrate heating. The thickness of each layer is approximately 500 nm thick. Characterization were performed with grazing incidence X-ray diffraction (XRD) cross-sectional field emission scanning electron microscope (FE-SEM) with chemical analysis by energy dispersive X-ray (EDX) and atomic force microscope (AFM). It was found polycrystalline Al and Cu thin films have been grown with {111} preferred growth orientation with very fine crystallites size (less than 20 nm). The bilayers were in non-strained condition, but each layer shows different morphologies between the columnar and non columnar structure. AFM analysis revealed that the bilayers top surface appears to have higher surface roughness (Ra = 20 nm) due to low adatoms surface mobility during room temperature deposition.