bluuebunny/crossref_metadata_2025 huggingface dataset:
X-Ray Diffraction Analysis Analyze the Error of Residual Stress by Using Mathematical Statistics
Authors: Feng Ai Xin , Xu Chuan Chao , Cao Yu Peng , Sun Huai Yang , Ni Gui Fen , Wang Jun Wei , Zhou Peng Chen
Published: December 2010

X-ray diffraction analysis methods analyze the residual stress the same location for 50 times of 7050 aluminum alloy. And taking residual stress error for statistical analysis, through hypothesis testing and analysis of the residual stress error Square diagram, obtain X-ray diffraction the residual stress error of the 7050 aluminum alloy approximately obey normal distribution.
Study of Surface Temperature Distribution in Plastic Sheet Spraying
Authors: Chen Zai Liang , Yan Ji Zhong
Published: December 2010

The heater’s setting temperature is calculated by using the heat transfer theory. Using the thermal module of ANSYS software to simulate the plastic sheet’s surface temperature field, acquired the distribution of the plastic sheet’s surface temperature field. The results show to get even spraying with the right temperature for spraying experiments.
A Layered Model for the Growth of Solid Tumors in Vascular Phase
Authors: Zhan Kui Hua , Bai Lun , Dai Hong Qin
Published: December 2010

We divide a solid tumor in vascular phase into a vascular layer, an oxygen-diffusion layer, an oxygen-resistant layer and a necrotic layer outside-to-inside, and have constructed a layered model for tumor growth. The actual growth curves of the tumors have been obtained by using different invasion speeds of the vascular layer. The simulative calculation results indicate that the angiogenesis rate is positively correlated with malignant degree of the tumors, if the tumors enter vascular phase, survival time of tumor patients is about 1-4 years, but the tumor patients without angiogenesis can live with tumor.
A Study on the Technology and Equipment for Recycling Spent Zinc-Manganese Dry Batteries
Authors: He Qing Zhong , Li Jun Qing , Wang Jia
Published: December 2010

This paper presents an integrated processing technology for the recycling of spent Zn-Mn dry batteries by means of dry-wet method, which combines mechanical decortications and vacuum technique. On the basis of analyzing current research and applications, the characteristics and problems of existing technologies in this field are discussed. Research achievements such as its processing, key techniques and equipment for mechanical decortications are introduced in detail. This technology has many advantages, including higher recovery rate, lower energy consumption, minimum secondary pollution and lower cost for equipment, which is suitable for the purpose of recycling spent batteries in small and medium-sized cities and provides a new option for technicians and researchers in related fields.
Automatic Lighting Control System for Teaching Building Based on Wireless Sensor Network
Authors: Yuan Jin , Wang Yu Sheng , Zhang Xi Liang , Zhao Li Juan , Huang Lin Jie
Published: December 2010

With the enhanced awareness of energy conservation and eye health, more and more concerns and attentions are focused on the teaching building lighting control technologies and related products. In order that the lighting management of teaching building can be facilitated and the lighting effects and lighting conditions of teaching can be improved, the lighting automatic control system for teaching building is designed by adopting Dimmable electronic ballasts and wireless sensor network. To achieve the control of light switch and regulation of light intensity, the infrared sensor is chosen to detect the human body and illumination sensor used to detect the illuminance values. System operation shows that the lighting control system is stable, reliable and flexible. Compared with the traditional lighting, it can generate 10%~15% energy savings in one classroom within a week by statistical estimation, which has confirmed that the lighting control system realizes significant energy savings.
Production Process Management for the Composite Component Manufacturing Workshop
Authors: Mei Zhong Yi , Liu Yong Jin , Younus Muhammad
Published: December 2010

This paper presents a Manufacturing Execution System (MES) for the composite component manufacturing workshop of an aerospace enterprise. The production process management is the core module of the MES. The system shows the production process management has important effect on the workshop production. The function modules of the production process management are introduced in detail. An improved working flow of the production process for optimizing the traditional production process is emphatically described. Barcode technology is applied to collect the production data and quality inspection data. By scanning the barcode, the real time data information can be collected and data statistic analysis can be done rapidly. The integration relationship between the production process management system and other systems is also introduced. Three-layer structure is adopted to design and develop the system. The developed system has been applied in the composite component manufacturing workshop. The results show that working efficiency of production process management has been improved.
Finite Element Modes Analysis of Involute Planetary Gear in RV Reducer
Authors: He Wei Dong , Zhang Ying Hui
Published: December 2010

Paper built the solid model of RV involute planetary gear with three dimensional modeling software Pro/E, dumped this model into ANSYS with IGES middle exchange file, define the three crankshaft solid connect with the three involute gear, carried on the modal analysis with finite element method, obtained the natural frequency and the vibration mode,. Results put out the danger frequency focus on 3645Hz, 8610Hz ,16729etc., then paper examined the different natural frequency and contrast them with the natural frequency of whole RV reducer, results shows that when the input speed of reducer turning at 1500r/min, for the three involute gear it’s not easy to cause resonance, but being the incentive frequency is 525Hz, it should to pay attention to avoid 451.63Hz, which was a key natural frequency of RV reducer, finally paper laid the system's dynamic response calculation and analysis of RV reducer.
Mechanical Stability Analysis of Subsea Wellhead for Deepwater Production to Earthquake Load
Authors: Xiao Wen Sheng , Lin Xiu Juan , Wang Hong Yan
Published: December 2010

Subsea wellhead for deepwater production subjects to axial force, lateral force and bending moment under the seismic loading, the effect of subsea christmas tree and casing string’s gravity. Joint action of these forces makes it is possible that horizontal displacement exceeds the limitation and thus loses the stability. A mechanical analytical model of subsea wellhead for deepwater production is established on the basis of the pile foundation theories and material mechanics, the seismic load and behavior between casing string and formation are considered. The analyses on lateral displacement, angular distortion, bending moment and shear force show that the affection of lateral load is focus on the upper section of casing string, and the lateral displacement of subsea wellhead for deepwater production increases along with earthquake load and thus decreases stability. The stability improves notably with the increase of coefficient of soil reaction. Therefore it is necessary to obtain the on-the-spot geological data in shallow formation. The wellhead stability may be improved to different degrees by taking measures such as minimizing axial load, enhancing the conductor bending strenth, increasing the depth of the casing string in soil, reducing the outcropping length of the casing string.
Design of the Hydraulic Press Assembling the Coupling Based on the Virtual Prototype Technology
Authors: Wu Xiao Hong , Lin Xiao Jun
Published: December 2010

In this paper, the hydraulic press to assemble the coupling is designed after its structure characterisdic and work method is introduced. The press mounting device is used to assemble the coupling of a small generator drived by hydraulic oil. In design, the entity model is established using 3D design software Pro/E, and the dynamic and kinimatic characteristics of the virtual prototype of the hydraulic press are simulated in software ADAMS. Thus all kinds of design defects are deleted at the initial stage of the design, the design period can be shorten, the efficiency of design can be raised, and the best and innovative products can be obtatined.
Research on Double-Face Online Dynamic Balance Technology of Machine Tool Spindle
Authors: Zhang Shi Hai , Wu Liang Sheng , Teng Xian Bin
Published: December 2010

Based the principle of online dynamic balance device with balancing disks, the design method of embedded double-face online dynamic device was proposed. Balancing disks could be disengaged from the spindle by Hydraulic system, and the rotating speed of the disengaged disk was kept steady and under the speed of the spindle by friction torque. The systems of signal acquisition, signal analysis and control, hydraulic pressure were designed. The feasibility was proved and analyzed by examples.
Multidisciplinary Robust Optimization Design of Multi-Functional Open-Air Hydraulic Drill
Authors: Luo You Xin , Wen Hui Jun , Li Heng Shu
Published: December 2010

In this paper, the basic concepts and methods of multidisciplinary design optimization, uncertainty analysis and robust design have been introduced. According to the features of a multi-functional open-air hydraulic drill, a new design theory called multidisciplinary robust optimization design was discussed. This theory can undertake uncertainty analysis and robust design in multidisciplinary design optimization. It fully considers both the synergy among each disciplinary or subsystem in the multi-functional open-air hydraulic drill to get the optimal solution to the whole system and the effect of the uncertainty factors upon the drill quality, and adopts the parallel design to improve the quality, robustness and reliability of the drill, to shorten the market cycles of products, to reduce product cost. Finally, the design points were discussed in detail in the paper.
Energy-Saving Design for Hydraulic Cylinder Reciprocating Seal Based on QFD
Authors: Zhang Qing Qing , Zhang Fu Ying
Published: December 2010

An energy-saving design for hydraulic cylinder reciprocating seal is proposed in this paper to improve using efficiency of seal, and reduce environmental pollution and energy consumption caused by oil leakage. HOQ of QFD is utilized to translate customer requirements into technical design requirements controlled by environmental factors, and the conflicts between technical requirements are obtained. TRIZ theory is used to resolve the conflicts, and gets energy-saving design solutions. The energy consumption compare between before and after improving seal is presented to illustrate the validation of the methods.
Study on the Micro-Replication Precision of Shark Skin
Authors: Luo Yue Hao , Zhang De Yuan
Published: December 2010

The biomimetic highly-efficient drag reduction surface can be directly replicated by shark skin as biological template, and the pre cured micro-embossing technology is put forward aiming at the thermosetting materials. In the process of bio-replicated forming, the replication precision is one of the most important factors in evaluating the forming effect, and the convincing and reliable assessing method has become an urgent problem to be solved. In this paper, the new evaluating way on the basis of statistical method is put into application, which provide the new idea and method to study the forming quality and effect, and the replication-precision of single scale and regional scales is in comprehensive and deep analysis. In addition, the factors causing forming errors are also illustrated and discussed, which lay the foundation for further research.
Research of Strength of Rotor System about Containing Blade Crackle Based on Nonlinear Dynamics
Authors: Liu Xiao Bo , Li Kai Qin
Published: December 2010

As the condition of a certain blade cracked of rotor system of fans, limited short-axletree nonlinear dynamics model is used ,the vibration frequency and nonlinear dynamic stability single-disc rotor is discussed, interior stress distribution and size of rotating shaft after loaded is analyzed concretely by ANSYS software. Through contrast X, Y, X-Y three directions stress distribution of rotating shaft interior, for entity model of near support disc and shaft, it is observed that its field of stress distribution compare dense is near--support field，also stress concentration is relatively bigger after load is added. Meanwhile ANSYS software is used to calculate by simulation this relation of the blade cracking spread width-temporal of four different alloy material and to count the intensity、stress distributing and the axial displacement of the axletree. The best numerical value about elastic modulus and hardness of the material is found by analysis the curve of crackle width- time function.
Numerical Simulation of Chilled Cast Iron Camshaft in Sand Casting Process
Authors: He Bin Feng , Zhao Zhu Qing
Published: December 2010

There are many kinds of casting defects such as insufficient pouring, cooling separation, crack, and shrinkage and soon on were formed in the mold filling and the solidification process, which affect the final casting performance. Based on the mathematical models of mold filling and solidification process, the numerical simulation of chilled cast iron camshaft in sand casting process has been done. The filling behaviors at each stage in the filling process were presented. The temperature distributions in the solidification process were obtained, and the positions of shrinkages were predicted. According to the simulation results, an improved technology is proposed, and the shrinkages were eliminated efficiently. The simulation results are in good agreement with practical.
Analysis of Singular Integral of Fast Multipole-BEM Applied in Three-Dimensional Elastic Contact Problem
Authors: Ren Zhi Feng , Meng Fan Xia , Gui Hai Lian
Published: December 2010

Fast multipole boundary element method (FM-BEM) is applied in three-dimensional elastic contact problem, but the singular integral influence calculation efficient. How to solve singular integral is become an important problem for improving FM-BEM. In this paper, Taylor series expansion and Laplace transformation were introduced; it can be used to improve the singular integral. After Laplace transformation, the singular integral is written as exponential series form, which can be suit for fast multipole method. It is not only solving singularity, but also suit fast calculation. This method improves the calculation time and calculation accurate of FM-BEM.
Simulation Analysis on Transmission Function of Parallel Indexing Cam Mechanism Based on Adams
Authors: Zhao Hao Dong , Cao Yan Ke , Guo Pei Quan
Published: December 2010

Dynamic modeling method for parallel indexing cam mechanism was presented based on rigid-flexible coupled modeling according to the analysis of mechanism feature. Dynamic simulation has been done with the dynamic model established by means of Adams. Dynamic characteristics of different transmission functions commonly used in practical engineering were analyzed in detail from the perspective combined kinematics and dynamics. The application principle of transmission functions was presented based on dynamic simulation and analysis results. That is Modified Cosine transmission function being suitable for applying in low speed or low precision transmission cases, Complex or Gutman’s transmission function being suitable for applying in high speed, heavy load or precision transmission cases. Complex transmission is the best one for design of high-speed indexing cam mechanism.
A Multibody System Model for Meshing Gears
Authors: Lei Liu
Published: December 2010

As a type of numerical approach to dynamics of gears, multibody dynamics method can handle realistic cases of contact modeling with acceptable accuracy and considerably less computational effort. The ability to simulate contact between teeth has become an essential topic in multibody dynamics. Fully rigid method is not suited for a high quality of the analysis to take into account some elasticity in the model of meshing gear wheels. In our new approach the circumferentially rotatable rigid teeth and elastic elements composed of rotational spring-damper combinations are hereby put forward. The teeth and the body of each gear wheel are still regarded as rigid bodies, but they are connected with each other by elastic elements. Besides, Lankarani & Nikravesh Contact Model is utilized, which counts energy dissipation by means of viscous damping. Both large motions with revolutions and important elasticity are considered in this teeth-wheel multibody system model. Two examples are provided in which the simulation results of completely rigid method, the approach in [10], our new approach and finite element methods are compared. Comparisons indicate that our newly developed approach is more suitable for modeling multibody geared systems.
Influencing Factors Analysis on Regulating Effect of the Pintle Controlled Thrust Regulating Mechanism
Authors: Zhang Lan Ting , Cheng Hai Qing , Song Li Ming , Yan Jin Shun
Published: December 2010

Based on the thrust regulating principle of pintle controlled solid-rocket engine, the mathematical model between pintle motion and thrust changing is established, and influence of main factors to thrust regulating effect is analyzed. These results can provide theoretical foundation for structure design and control of pintle controlled thrust regulating mechanism of solid-rocket engine.
Research and Application of Synchronous Dynamic Test and Adjustment Technology for Novel Water Injection Well
Authors: Jia De Li , Zhao Chang Jiang , Zhang Shu Jin , Zhao Ming Xin , Xu De Kui
Published: December 2010

To solve the problem that the conventional layered water injection technology has too long test and adjustment period and strong interference among layers at the ultra-high water cut stage, a novel digital synchronous dynamic test and adjustment technology is proposed and developed in this paper. Many advanced technologies, including digital multi-information test and adjustment, bidirectional transmission of remote wireless signals and non-contact electric energy transformation, are adopted to combine multi-information test and flow control to be a whole thrown into the well. This technology can automatically monitor each water injection layer and adjust water flow in user-defined period without any intervention; it can synchronously and dynamically adjust flow of each layer; and it also can monitor and adjust flow data by the redisplay of computer. The experimental results show that this technology not only reduces the field workload and improves water injection effect, but also provides the basis of data analysis for implementation and adjustment of meticulous oil development plan.
Finite Element Analysis on the Large Deformations of Rubber Structure
Authors: Xu Bing , He Qin Shu , Yu Shao Rong
Published: December 2010

In this paper, the hyperelastic constitutive theory, the well-know hyperelastic models and the range of uses are introduced. Finite element simulations of the compression tests have been performed with the incompressible Mooney-Rivlin constitutive theory. The choices of parameters in the hyperelastic modeling, the element type, mesh technique and the contact stiffness in the simulation are discussed. The predicted simulation results agree well the experimental data.
A New Feature Fusion Method for Handwritten Character Recognition Based on 3D Accelerometer
Authors: He Zhen Yu
Published: December 2010

In this paper, a new feature fusion method for Handwritten Character Recognition based on single tri-axis accelerometer has been proposed. The process can be explained as follows: firstly, the short-time energy (STE) features are extracted from accelerometer data. Secondly, the Frequency-domain feature namely Fast Fourier transform Coefficient (FFT) are also extracted. Finally, these two categories features are fused together and the principal component analysis (PCA) is employed to reduce the dimension of the fusion feature. Recognition of the gestures is performed with Multi-class Support Vector Machine. The average recognition results of ten Arabic numerals using the proposed fusion feature are 84.6%, which are better than only using STE or FFT feature. The performance of experimental results show that gesture-based interaction can be used as a novel human computer interaction for consumer electronics and mobile device.
Micro-Measurement of the Virus-Infected Region Using NIS-Elements System
Authors: Yang Hong Yi , Zhuang Xin , Li Li Li , Qin Zhi Wei
Published: December 2010

A method was successfully developed for the measurement of the virus-infected region and distribution of virus. The system consists of a in situ PCR instrument, a light microscope, and an image processing and analysis software. Through developing a in situ RT-PCR system for location of a strawberry virus, the sections were observed on a Nikon light microscope by magnifying 400×. Alcian blue precipitate was observed in palisade tissues, and it indicated that the virus was located in the tissue. The area of the virus-infected region was measured by NIS-Elements software. At last, the distribution of virus in tissue and the area of infected region could be analyzed and accounted on the basis of the micro-measured results. The average area of forty virus-infected regions was 1.5×103 µm2, in addition, the ratio of the area of healthy region to virus-infected one was 3.4. The system achieved to measure quantitatively the virus-infected tissues dispensing with the complicated transmission electron microscope (TEM).
Study on the Drive/Brake Features of Vehicle with Electric Control and Hydrostatic Drive
Authors: Zhang Qing Yong , Guo Shu Jun
Published: December 2010

A new technical scheme of vehicle with electronic control and hydrostatic drive (ECHD) is proposed in the paper. To make out the drive/brake features of the vehicle, a model, combined with the vehicle dynamics and hydrostatic transmission dynamics, and the corresponding simulation program is developed, in which, a gas-charged accumulator is used as power source and energy storage component. In this paper, three main misuses are investigated, i.e. the energy recover and consumption of hydrostatic transmission when drive/brake, vehicle dynamics parameters in drive/brake and how the key components, hydraulic variable motor and accumulator, contributing to the performance. The result of simulation shows some characteristic features of the ECHD vehicle, which should be paid attention on when study the ECHD vehicle.
Research on Switched Reluctance Generator for Off-Grid Variable-Speed Wind Energy Applications
Authors: Mao Jing Feng , Wu Guo Qing , Wu Ai Hua , Zhang Xu Dong , Cao Yang , Yang Kun
Published: December 2010

This paper presents a theoretical analysis and experimental evaluation of the switched reluctance generator (SRG) for off-grid variable-speed wind energy applications. The detailed model, control parameters and operational characteristics of the SRG as well as variable-speed wind turbine are discussed. In order to drive the wind energy conversion system (WECS) to the point of maximum aerodynamic efficiency, a SRG power output feedback control strategy which optimized angle position-current chopping control cooperating PI regulator is proposed. The control strategy is also demonstrated by means of Matlab/Simulink. Moreover, an experimental test system is set up, which a cage induction machine is used to emulate the variable-speed wind turbine. The experimental results validate the proposed control strategy and confirm the SRG performance.
Bifurcation Analysis for Sailing Stability of Autonomous Underwater Vehicle
Authors: Shao Song Shi , Sun Jiong , Liu Kai
Published: December 2010

There are several nonlinear elements in the equations of Autonomous Underwater Vehicle(AUV) movements. It is difficult to deal nonlinear problem with traditional methods. A hydrodynamic parameter interference is chosen as bifurcation parameter at first. Then the sailing stability of AUV with proportional-derivative controller is analysed by bifurcation theory. The center manifold theory is used to get the expression of system state parameters. And the Hopf bifurcation of system is analysed. The result is verified by numerical simulations. It shows that the hydrodynamic parameter’s changing will bring Hopf bifurcation for depthkeeping saiiling. And the range of hydrodynamic parameter value that insures AUV sailing stability is given.
Design of Injection Mould for Cars’ Interiors Based on CAD/CAE Technology
Authors: Li Yan Juan
Published: December 2010

The structural features of the cars’interiors were analyzed. A solid model about the cars’interiors and the injection mould were put up by using UG three-dimensional sculpting technolgy and using Moldflow software to analyze and simulate injection progress for the plastic part. The results showed that the use of CAD/CAE technology could assure the veracity of the injection mould effectively, shorten the design time of the part, reduce the time of trying mould, decrease the manufacturing cost and these could enhance the competion ability of the corporation in the market.
Study on Realtime Information Integrating System Orienting Enterprise
Authors: Li Yan Juan
Published: December 2010

To integrate the information of equipment and plant in designing, achieve the whole information of plant production course and share the data is the only way in corporation management information. The method and key technology of integration from local control layer to management layer were introduced. The application of Web Service was presented, and the detail development process for a plant was expatiated.
Comparison on Simulation and Experiment of Supply Air through Metro Vehicle Air Conditioning Duct
Authors: Tao Hong Ge , Chen Huan Xin , Xie Jun Long , Jiang Jun Zhi
Published: December 2010

CFD technique is often employed to simulate and optimize air duct design, but the corresponding experiment validation in metro vehicle is rare. By taking an independent metro vehicle duct as research object in this paper, supply air through air duct is simulated and compared with the actual test results from the angle of supply air velocity at each outlet and supply air volume through several outlets of air duct. The results show that the relative deviation of simulation and test value of air velocity at most of the outlets are within or near ±20%, which is acceptable for the engineering applications. Moreover, the ratio of supply air volume through several outlets to the corresponding total supply air volume through main air duct or flat duct in the case of simulation is consistent with that in the case of experiment. It can be concluded that numerical simulation method is effective and reliable in air duct optimization design of metro vehicle.
Stiffness Matching and Ride Comfort Optimization of Heavy Vehicle's Suspension Based on ADAMS
Authors: Pang Hui , Li Hong Yan , Fang Zong De , Wang Ji Feng
Published: December 2010

In order to reasonably match suspension stiffness and realize the optimization of vehicle ride comfort, a time-domain virtual prototyping model of the 8×4 heavy vehicle is established based on dynamic software ADAMS, and its vertical vibration responses are simulated and analyzed on road level B. After that, an optimal design method for heavy vehicle’s suspension system is put forward. In this proposed method, the first, the second axle suspension stiffness and the balance suspension stiffness are taken as the optimal variables and the maximum values of Z-direction power spectral density (PSD) of the cab and cargo boxes mass center are chosen as the optimal target. By using SQP (Sequential Quadratic Programming) algorithms to conduct optimizing calculation, thus the optimal suspension stiffness parameters are obtained, which promotes and improves the heavy vehicle’s ride comfort.
Simplified Evacuation Planning Model on Naval Ship
Authors: Liu Chong , Qiu Chang Hua
Published: December 2010

In light of the growth in the numbers of maritime disasters during recent years, there is a growing interest in the evacuation of passengers and crew at sea, as documented in recent discussions at the Marine Safety Committee of the IMO. NATO has also developed analogous regulations as part of its Naval Ship Code. In this paper we propose a simplified evacuation model based on the shortest emergency evacuation time for emergency evacuation of a naval ship, which using the theory of mixed-integer linear program to solve navy ship evacuation problem. This evacuation planning model focused on the average evacuation time to travel through the ordered sequence of consecutive arcs by each group. In addition, the model revealed the amount of flow per time unit through the door. Secondly, we proposed a heuristic algorithm to produce sub-optimal evacuation plan. A numerical example is given at last. Results show that the model based on the theory of the mixed-integer linear program can provide more available evacuation solution for naval ship evacuation process.
Research on Control System of Pump and Valve Parallel Connection
Authors: Luo Jing , Sun Chun Geng , Zhang Peng , Liu Sen , Wu Song Tao
Published: December 2010

This paper introduces the composition of pump and valve control system of parallel connection and the output flux of pump and valve is distributed optimally. Then, establish the state-space model of pump and valve system, the system is simulated by Simlink and AMESim software, the simulation results obtained.
Numerical Model of Organic Light Emitting Device with Different Thickness
Authors: Xu Yan Mei , Liu Chong , Yang Zhi Ping
Published: December 2010

In the paper a new OLED is provided. By adjusting the thickness of each layer in OLED the peak spectral wavelength moves to red. To explain the phenomenon a new simulation is presented to research the relation between thickness of the layer and their CIE coordinates. We use optical transmission matrix to deal with multiple layers. As a result, we obtain the relationships between the CIE coordinates of the device and the thickness of each layerIn this paper, we provide such a theoretic analysis.
Study on Banded Structure in Low Carbon Vessel Plate for Nuclear Power Plant
Authors: Xue Fei , Luo Zhi Feng , Yu Wei Wei , Wang Zhao Xi , Zhang Lu
Published: December 2010

In this paper, the role of the pearlite-banded structure on fatigue crack growth behavior was investigated on carbon vessel plate material SA516, which is commonly used in the nuclear power plants. Along pearlite-banded orientation, in situ fatigue tests indicate that the crack initiated and propagated in the ferrite and then extended along the ferrite-pearlite interface when it met pearlitic colony. For comparison, the cyclic loading was also carried out perpendicular to the banding direction of the microstructure, and an intense crack branching was observed which led to fatigue crack retardation. Besides, the orientation perpendicular to banded pearlite in the investigated ferrite-pearlite steel was found to have a lower fatigue crack growth rate.
Devise of the RCF Test Rig for Ceramic Bearing Ball by Design Methodology
Authors: Zhou Jing Ling , Wu Guo Qing , Chen Xiao Yang , Zhu Wei Nan , Ren Yu Song , Gao Er Gang , Chen Jian Chun , Zuo Wei Ming
Published: December 2010

It is presented to apply the designing methodology in design of an accelerated pure rolling contact fatigue test rig for ceramic bearing ball. Starting with function analysis, the request and structure of test rig are analysed. Meanwhile, the form matrix table is established, from which many designing schemes can be obtained. In accordance with several kinds of innovation schemes, the appraised decision of product is analyzed. The specimen machine is made according to the design scheme in the design of innovation.
Constructing a Class of Four-Dimensional Correlative and Switchable Hyperchaotic Systems
Authors: Yang Fan , Li Dong , Tu Hong Qing
Published: December 2010

A class of four-dimensional correlative and switchable hyperchaotic systems were built by adding state variables, nonlinear functions or using the method of anti-control the three-dimensional chaotic system. We studied detailedly some of its basic properties, such as the feature of equilibrium, the phase portraits of hyper chaotic attractor, Lyapunov exponent and the evolutive course of systemic dynamical action.
Rigid-Flexible Coupling Dynamics Analysis of Clock Mechanism
Authors: Sui Li , Shi Geng Chen , Song Ping , Song Wei
Published: December 2010

As a device for time-delay, clock mechanism is widely used in fuze safety and arming device, whose core component is the runaway escapement. With the development of artillery systems, the dynamic environment during the projectile becomes more and more complicated. Recently, some shots misfire or premature explode during shooting process because runaway escapements’ miswork. This paper utilizes gear system’s research results applied in other fields, discusses clock mechanism’s dynamics problem, and uses ADAMS to analyze runaway escapement’s rigid-flexible coupling model. From comparing the simulation results of multi-rigid model and rigid-flexible coupling model, we find that elastic deformation will affect runaway escapement’s movement, even can cause the whole device to work abnormally.
Numerical Simulation of Atmospheric Pressure Plasma Jet Using Lattice Boltzmann Method
Authors: Sun Yan Zhou , Dang Ya Bing
Published: December 2010

A model for calculating the velocity and temperature field of plasma jet by Lattice Boltzmann (LB) method was established in this paper. The numerical simulation of plasma jet was derived by selecting two opportune equilibrium distribution functions, and the results obtained are compared with those of the experiment and in literature. It is found that the LB method is simpler and more efficient than the traditional finite difference method.
Inverse Dynamics Analysis of a 2-DOF Planar Parallel Manipulator
Authors: Zhu Xiao Rong , Shen Hui Ping , Zhu Wei , Cai Lan
Published: December 2010

The dynamic characteristics of the parallel mechanism depend strongly on the operating modes corresponding to different inverse solutions, but few of them have been involved with. In this paper, a new kind of 2-DOF parallel manipulator actuated horizontally by two parallel linear actuators is investigated. Firstly, the four inverse solutions of this manipulator are derived and analyzed; Secondly, the closed form inverse dynamic model is presented using the Lagrange approach based on the generalized system coordinates. An explicit formula of the equivalent moment of inertia, driving forces and consumed energy of the mechanism are investigated; Finally, the changes of equivalent moment of inertia, actuator force and energy consumption of the mechanism in different operating mode are analyzed through the dynamic numerical simulation. The results show that, for a given motion, the configuration and the operating modes have a significant influence on the equivalent moment of inertia and actuator force. The analysis provides necessary information for dynamic performance analysis and control of this parallel manipulator.
Robust Reliability Design for Networked Control Systems Based on State Observers
Authors: Huo Zhi Hong , Zheng Yuan , Xu Chang
Published: December 2010

Networked control systems with network-induced delay, packet loss and parameters uncertainty is modeled in this paper, consider the sensors that can’t send information to controller and the actuators that can’t receive information calculated and sent by the controller, the integrity design of the networked control system with sensors failures and actuators failures is analyzed based on robust fault-tolerant control theory. Parametric expression of controller is given based on feasible solution of linear matrix inequality. After detailed theoretical analysis, the simulation results is provided, which further demonstrated the proposed scheme.
Study on Modeling of Growth Conceptual Design
Authors: Li Pei Gang , Feng Xian Ying , Song Ya Qing
Published: December 2010

Based on decomposition and reconstruction principle, by analyzing the limit essence of rigid body in generalized coordinate system, the paper proposes growth conceptual design model from function to structure. It applies the mechanism of biological growth into conceptual design of products, realizes the stable mapping from function to structure, and also solves the issues of multi-solutions, uncertainty, etc, existing in the mapping process from function to structure of mechanical products in conceptual design stage. Establish the product knowledge model supporting product conceptual design, use the Case-Based reasoning (CBR) technology into entities match and verify it by case, which provides a new idea for the conceptual design of computer aided product.
Development of Automotive Electronics HIL Simulation Experimental Platform
Authors: Lian Jing , Zhou Ya Fu , Ma Teng , Shen Xiao Yong
Published: December 2010

This paper presents a low-cost, simple and reliable solution for automotive electronics Hardware-In-Loop (HIL) simulation, taking Jetta AT1.6 car as object, designs and develops automotive electronics HIL simulation platform. Firstly, the overall structure of the platform is designed; secondly, system hardware platform is developed and built using Protel DXP; then, HIL simulation models of ABS (Anti-lock Braking System), engine and automatic transmission are built using Matlab/Simulink and develop automotive electronics HIL simulation platform; finally, carry on the experiment and the results show that the designed HIL simulation experimental platform is good. The platform has widespread applicability in the teaching experiments and the aspects of developing, debugging and testing of automotive electronics control systems.
Mechanical Analysis and Study on Structural Parameter of Partially Earth-Anchored Cable-Stayed Bridge Part I: Mechanical Analysis
Authors: Zhang Li Wen , Xiao Ru Cheng , Xia Rui Jie
Published: December 2010

Based on a partially earth-anchored cable-stayed bridge with 1218m main span and composite beam, the mechanical analysis of this bridge type was conducted in this paper. The bridge was simulated with space pole department model, in which the beam element was used to model girder and tower, the truss element was used to model stayed-cable whose sag effect was corrected by Ernst theory. The load cases considered in analysis include: the completion state, the live load, the temperature load and other load combination. The analysis content include: the structural deformation, the structural internal force, the structural stress.
The Thermal Influence of Green Roofs on Air Temperature in Taipei City
Authors: Sun Chen Yi
Published: December 2010

During the last decade, a large amount of research has been published in Taiwan on the reduction of the urban heat island effect for different strategies. The most important strategy for reducing ambient temperature and mitigating the heat island effect is to encourage citizens to build green roofs on their buildings. For analyzing the effect of a green roof on the thermal environment, this paper collects temperature and humidity data from two building roofs that have different greening levels and tries to analyze the thermal influence of a green roof on air temperature in Taipei City. The results of this research can give citizens an idea what kind of thermal environment they can benefit from; moreover, it also can provide useful data to governments for calculating the environmental benefit if they carry out a green roof policy.
Research on Meshing of Face Gear Drive under Errors of Alignment and Machining
Authors: Zhao Ning , Guo Hui
Published: December 2010

The coordinate systems for cutting face gears and for meshing of face gear drive with involute cylindrical pinion. The tooth surface equation of face gear with machining errors is deviated, such as change of shaft angle, change of shortest distance between face gear and cutter tool axes, helix angle of cutter tool. Tooth contact analysis applied in the paper considered with the alignment error of the driving system. The tooth contact path and the transmission error of the face gear drive were simulated through the tooth contact analysis for different alignment errors and machining errors. The simulation results indicate that all of the alignment errors and machining error don’t cause transmission error except helix angle error of the cutting tool. The errors will bring the shift of the contact path on gear teeth. The shift of bearing contact can be reduced by combination of different errors of alignment or machining.
Design and Simulation for a Carton Packaging Robot
Authors: Zhang Lei , Hu Xu Dong , Xu Yong Kang
Published: December 2010

Product packaging is one of the key industrial sectors where automation is of paramount interest. This paper deals with the conceptual design and kinematic simulation of the machine for a carton packaging robot. In a conceptual design phase, many studies for packaging robots are investigated, leading to the invention of a carton packaging robot. Combining this robot with two 3-DOF fingers mechanism, two 2-DOF fingers mechanism, two tappets and cams mechanism, a carton packaging robot can be created which is particularly suitable for package cartons at very high speed. In this paper we also present a workspace analysis methodology that can be applied for optimal design of robots in the further work.
Model Test Study on a Single Diagonal-Span Arch Bridge with Curved Beam
Authors: Wang Qian , Shi Lei , Zhang Zhe
Published: December 2010

Tong-Tai Bridge is a special-shape arch bridge with arch obliquely cross the curved beam. In order to validate the theoretical solutions and ensure the structure safety, model test is discussed. In this paper, the structural design, fabrication procedures and test method of the model are presented. Meanwhile, the finite element method is applied to analyses this special structure. Some experience of the structure construction is obtained during the practice process and the experimental results achieved are satisfactory.
Condition Monitoring and Life Prediction of Rolling Guide Based on Hybrid Intelligence
Authors: Gao Hong Li , Shi Xiao Hui , Feng Ling Cong , Xu Li Ping
Published: December 2010

To evaluate accurately working condition of guide, make maintenance strategy, and predict its residual life in the process of machining operation, a rolling guide rail condition monitoring system based on neural networks was constructed after key factors to guide life were investigated carefully. Eight B&K 4321 three-way vibration sensor were installed on slider surface to monitor the on-line condition of four guides and eight sliders. Vibration signals were processed by wavelet packet decomposition and the most sensitive features to guide life were selected by fuzzy clustering method. The relation between guide life and input vectors including vibration features and machining condition was built by radial basis probabilistic neural networks (RBPNN), which parameters were optimized by genetic algorithm. The experimental results show maximum forecast error is 360 hours and minimum forecast error is 63 hours.
Evaluation of Green Technology Innovation Capacity of Automobile Manufacture Industry
Authors: Wang Yan Rong , Xu Qiao Ling
Published: December 2010

to cope with the pressure of energy and ecological environment, automobile manufacture industry must implement green technology innovation. According to the characteristics of green technology innovation, the paper puts forward evaluation index system of green technology innovation capacity , establishes comprehensive evaluation model based on improved BP neutral algorithm by Matlab toolbox, and carries out empirical analysis of data from automobile manufacture industry, finally reaches a conclusion.
Early Fire Detection of Large Space Combining Thresholding with Edge Detection Techniques
Authors: Hu Guo Liang , Jiang Xi
Published: December 2010

Image segmentation is a crucial step of the early fire detection in large space based on image processing technology. The image edges contain abundant feature information, and the edge detection has been a main topic of image segmentation algorithm. In this paper, several kinds of traditional edge detectors have been used to detect the edge of frame target in the fire video images, and the results have been contrasted and analyzed. Considering the influence of breaks in the edge caused by noise, nonuniform illumination and spurious intensity discontinuities, proposing the method of combining thresholding with edge detection, using Otsu’s method to compute a threshold for segmentation, extracting the flame area from the background, and then using the traditional edge detectors to detect the flame edge. At the same time, the simulation results based on the MATLAB kits indicate that this kind of method has good effectiveness and strong robustness, the detected flame edges have better effect in integrality and definition, and the relevant result can be the basis of the subsequent extraction and analysis of the fire image features as well as the space positioning of the fire.
Fuzzy Adaptive Variable Structure Active Attitude Control of Flexible Spacecraft
Authors: Qu Fa Yi , Zhu Liang Kuan , Song Wen Long
Published: December 2010

This paper presents a novel control system design method for the three-axis-rotational tracking and vibration stabilization of a spacecraft with flexible appendages. Based on the sliding control theory, a robust attitude control law is derived to control the attitude motion of spacecraft. For actively suppressing the induced vibration, both fuzzy methods and strain rate feedback (SRF) control methods are presented. Numerical simulations are performed to show the feasibility and effeteness of the proposed methods.
Research on Multi-Disciplinary Behavior Coupling Model in IC Engine
Authors: Dai Xu Dong , Zhang Zheng Shan , Meng Xiang Hui , Zhang Zhi Nan , Xie You Bai
Published: December 2010

The paper analyzes the coupling of multi-disciplinary behaviors, including system dynamical behavior, combustion behavior and tribological behavior, of the cylinder liner-piston-rod-crank system in IC engine. Based on the state equation method, multi-disciplinary behavior coupling model of the Cylinder-Piston-Rod-Crank system is constructed and a multi-disciplinary behavior coupling analysis method in IC engine is presented on the basis of the state equation. With the coupling analysis model, the coupling effect of multi-disciplinary behaviors can be considered in the two sequential state calculations. By means of state calculation in time domain, the coupling effect of multi-disciplinary behaviors on life performance of IC engine can be predicted.
Study on Determination of the Content of Fe2+,Fe3+ in Medicine Haematitum with Different Characters
Authors: Xiong Nan Yan , Kang Lian We , Wang Xiao Mei , Zhou Ji Hong , Wei Cui Ling
Published: December 2010

Objective: Establishment the iron (Ⅱ), iron (Ⅲ) the content determines separately method in haematitum.Methods: Sample decomposition with hydrochloric acid and potassium fluoride. Determined the content of iron in different characters mineral medicine haematitum by UV-vis spectroscopy, pH3~5, wavelength 396nm；Determined the content of Fe2+, Obtained the content of Fe3+ by concentration difference. Results: This method is easy to do.The accuracy is good.The returns-ratio is high.The method may take the haematitum quality the control standard.