bluuebunny/crossref_metadata_2025 huggingface dataset:
Torque Converter Pump Wheel's Rapid Manufacturing Based on Stereolithography
Authors: Shi Guang Lin , Zhu Lin , Wen Quan Min
Published: November 2012

This paper introduce the method of the torque converter pump wheel's rapid manufacturing based on the Stereolithography and the key of the technology.Melt molded modelling's shell could be quickly obtained through this method, further to create the functionality needed parts,and to make the foundry production low cost and high efficiency, moreover, let the design synchronous with modification and manufacture.
Simulation Analysis of Friction Disc Temperature Field of Hydro-Viscous Variable Speed Clutch
Authors: Jiang Xue , Yu Yan , Zhang Yuan , Su Pei Pei
Published: November 2012

Hydro-viscous variable speed clutch transmits torque by means of viscous fluid between the friction discs. The study of temperature distribution on friction disc plays a very important role for the design of hydro-viscous soft-start device. When the grooves on the driving friction disc surface have more complex shape, the analytic solution of the temperature field is difficult to obtain. By the advantage of the periodicity of geometric dimension along the circumferential direction of the driving friction disc, physical model with radial and annular groove is simplified and built. FLUENT software is used to make a simulation analysis on the temperature field of the friction disc, transient and steady state temperature distribution is obtained which provides a new approach to the analysis of the temperature field of the friction disc with complex grooves.
Study on Technology Development of Power System Training Simulator for Modern Ship
Authors: Hu Da Bin , Hu Jin Hui , Lin Xiong Wei
Published: November 2012

Aiming at the characteristic of power system of modern ship, the components, software and hardware configuration, main function and feature of power system simulators are presented. Then the framework, simulation software and development of modeling technology are analyzed. At last, the improvement of instructor station and the application of VR technology for marine engine simulation are raised.
Study on Combination of Three and Four Edge-Sealing Based on Reconfigurable and Module for Vertical Bag Packaging Machine
Authors: Shang Rui , Jin Jing Lin
Published: November 2012

It can be combined in a single device for three and four edge-sealing of vertical bag packaging machine. This article studies how to combine them based on reconfigurable and module. The article focuses on the former, feeding device and so on that need to be solved in the combination. The article also studies modular division and standard interface of the modules.
Selection Methods of Rational Parameters of Core-Drill Working Tools
Authors: Soldatenko Andrey , Ao Hong Rui , Jiang Hong Yuan , Danilov Alexander
Published: November 2012

The paper presents the results of experiments in a circle drilling. Namely, the results of data processing load on the cutter (blade) moving in a certain radius, with step-checkboarded and sequential circuits of arrangement on the crown of ring bore. The paper presents the stresses of this incisor, with the two constellations, their relationship to each other. As a result, the conclusions brought under any scheme of arrangement of cutting elements are obtained by the least energy-intensive process.
Characteristics Analysis of Working Mechanisms for Servo Mechanical Presses
Authors: Sun You Song , Hu Jian Guo , Cheng Yong Qi , Ruan Wei Ping
Published: November 2012

Based on analysis of press working characteristics, some of the main kinematics requirements for working mechanisms of servo mechanical presses were put forward: fast in empty stroke, slow and uniform in working stroke and big force gain. Crank link and knuckle-straight link are the most common working mechanisms in mechanical presses. To meet the requirement of servo mechanical presses, another mechanism, knuckle-triangle link, was designed. The kinematics simulations of the three mechanisms for a 1600kN press were conducted by dynamic software ADAMS. Knuckle-triangle link had the most uniform and lowest slide’s average velocity and biggest force gain within the working stroke. For the same nominal pressure of 1600kN, the required input torque of knuckle-triangle link was 9108Nm. In comparison with crank link and knuckle-straight link, the crank’s input torque was reduced by 84% and 76% respectively without considering the influence of friction and inertia. In conclusion, knuckle-triangle link mechanism is more suitable for large-tonnage servo presses.
Diagnostics of Drum Type Wood Chipping Machines
Authors: Zarins Marcis , Torims Toms , Bumanis Maris , Chamans Andris
Published: November 2012

This paper investigates diagnostic methods and proposes modern service technologies for wood-processing equipment. The aim of this study is to ensure systematic, research-based wood-processing services and continuous, no-failure operation of facilities. We describe the working principle of a particular industrial, drum-type wood chipper and discuss the problems that occurred during operation, including potential excess engine load or construction imperfections. First experiments show that knife wear progresses even faster than previously expected. Cutting regime calculations are provided, along with a description of actual improvements and a comparison of cutting regimes before and after improvements. The intended result of this research is a monitoring unit with help of a few modifications, can be used on any drum-type wood processing equipment.
Research on Fault Feature Extraction Method of the Wind Turbine Gearbox Based on SVD and Improved HHT
Authors: Chen Chang Zheng , Gu Quan , Zhou Bo
Published: November 2012

This paper researches fault feature extraction method based on singular value decomposition and the improved HHT method for non-stationary characteristics of wind turbine gearbox vibration signal. Firstly, through the signal phase space reconstruction, the singular value decomposition as a pre-filter, to preprocessing the signal, effectively weaken the random noise. Then using EEMD to improve the HHT method, decompose the denoising signal into a series of different time scales component of intrinsic mode functions. The fault characteristics of the signal are extracted by the Hilbert transform. Finally, simulating gearbox fault experiment to verify the effectively of the proposed method.
Study on Leaning Sensing Device Based on Kerosene Ferrofluid
Authors: Cui Hai Rong
Published: November 2012

In measuring field, leaning sensing devices is an important measuring element in engineering project and lab testing which changes leaning signal to electrical one for detecting leaning attitude. This paper presents one kind of leaning sensing device based kerosene ferrofluid. The detecting principle is deduced and an experiment set up for verifying the deducing conclusion. Both deducing formula and experimental results show that the output voltage signal of leaning sensing system is linearity with leaning angle. The output signal is increased with the increment of leaning angle. And the sensitivity of this detecting system is increased with the increasing of input frequency. The experimental results are well conformity with the principle deducing.
EBD Step-up Control Research during Cornering Braking for Electric Vehicles on High Energy Regenerative Braking/Driving Integrated System
Authors: Wang Guo Ye , Zhang Lu , Zhang Zhong Fu , Chen Guo Yan
Published: November 2012

This paper sets up high energy regenerative braking and driving integrated system for electric vehicle and its dynamic model based on the wheel hub motor and friction brake integrated into electric vehicle braking system. Bend EBD hierarchical strategy of control is put forward, which is based on ABS system. Establish dynamic simulation system of electric vehicle integrated brake system and EBD control simulation system based on the Matlab /Simulink. Based on CheryA3 model car, the wheel hub motor drive system replaces the power system; carry out simulation and analyze the control performance of the integrated braking system during cornering braking. The results show that the bend EBD control performance of high energy regenerative braking/driving integrated system for electric vehicle is good, which has a high braking energy recovery rate, braking efficiency and braking stability.
Numerical Simulation of Flow Field in Cylinder of Gasoline Engine
Authors: Jiao Yun Jing , Lin Man Qun , Wang Xuan , Wang Xue Yan , Yan Xi Cheng
Published: November 2012

Abstract: By adopting CFD numerical simulation software, the transient state numerical simulation of engine is carried on. The intake and compression stroke are studied in maximum power and maximum torque conditions. Through numerical simulation, we can learn the change of TKE with the crank angle, and give a guide for improving design of intake port and chamber. At last, a conclusion is found about the engine that at high speed, the gas flow in cylinder infects the stability of spark ignition.
Study on Repair Techniques of Loader pin Based on Remanufacturing
Authors: Wang Yu Ling , Kong Yin Xiang , Wu Bao Hua
Published: November 2012

Pins of loader are damaged easily, and most of them have been abandoned every year. Remanufacturing for pins can reduce waste of natural resources and energy sources. In this paper, pins with different abrasion loss were selected and remanufactured by electrical arc spraying and oxy-acetylene flame spray welding, respectively. Then, the parameters of remanufactured pins such as dimension, surface roughness, surface hardness and crack were measured. Furthermore, the friction and wear characteristics of the repair coating/nickel coating pair were tested under dry lubrication condition with the MRH-3 high-speed ring-block friction and wear testing machine. With the help of SEM (scanning electron microscope) to observe the surface morphology of blocks, abrasion resistance of spray welding coating and spray coating were analyzed. Results indicate that two remanufacturing techniques both can make the scrap pins as new products, but pins which are remanufactured in the way of oxy-acetylene flame spray welding have better abrasion resistance than the way of electrical arc spraying.
Research on Lightweight Design Manual Piston Pump
Authors: Liu Nan , Liu Jin Li , Fang Bao Hua , Zhang Hong Wang , Shao Wei Guang
Published: November 2012

In this paper, as the research object a manual piston pump is designed lightweight, by using optimization theory and the finite element analysis method. The manual piston pump body, the piston and the end cover are designed proper structures include diameter, height, ayout, etc. The optimized calculation and research analysis provide credible theory and experience for engineering application.
Numerical Analysis and Optimization Design on Critical Parameter of Plane Four-Bar Linkage for a Crusher
Authors: Song Qiu Hong , Ma Yong Mei , Cao Shou Qi , Lv Chao , Li Jun
Published: November 2012

Plane four-bar linkage is widely used in mechanical products; it is a decisive factor to define the characteristics and output of crusher as the key mechanism for the model crusher. At first, expound and classify the critical parameter in theory; then ADAMS is used in parameterized modeling of plane four-bar linkage, according to the simulation optimization data of critical parameter in ADAMS, the relations among the critical parameter and influence on crusher performance are demonstrated after numerical analysis. Finally, the optimal critical values are optimized, which are applied into the design of a crusher.
Research Progress of On-Line Quenching Technology and Equipment
Authors: Yang Hai Bo , Li Wen He , Wang Hui
Published: November 2012

This paper introduced the present development and tendency of our country’s aluminium processing industry, especially the extrusion industry. As the industrial aluminum extrusion profiles accounted for the proportion of products will continue to rise, which raised for higher quality in products. All these lead extrusion equipments toward the direction of integration. It also talked about the theory and applications of on-line quenching, introduced the new progress of on-line quenching technology and equipment.
Finite Element Analysis on Working Mechanism of Hydraulic Excavator
Authors: Miao Xiao Peng , Zhang Wei , Wang Hai Bo
Published: November 2012

On the basis of working characters, taking a hydraulic excavator as an example, an integrated and refined finite element model of working mechanism was established. Selected four typical working conditions, the strength analysis was made for the assembled working mechanism. According to the finite element analysis, the structure of the working mechanism was improved. The improved working mechanism met the required strength design after increasing the hydraulic system pressure.The results show that this analysis method of working mechanism can provide reference for the excavator working mechanism design.
A Study of Friction and Adhesion Properties of ODS Film on MEMS Device
Authors: Horng Jeng Haur , Lin Jen Fin , Chern Shin Yuh , Wei Chin Chung , Chen Chun Yueh
Published: November 2012

With the rapid development of microelectromechanical systems (MEMS) technology, materials such as silicon, metal, and polymers are widely used in the MEMS field. One of the reliability concerns related to Si MEMS is unwanted wear and adhesion. Therefore, SiC film is a possible choice for surfaces because of its favorable friction and wear properties such as used in cutting tool and transmission system of wind turbine. In this study, biocompatible SAM film (ODS) was used to decrease the adhesion force and the friction coefficient of SiC surface. Experimental results show that ODS can increase the contact angle and decrease the surface roughness value of SiC surfaces for the different roughness values and roughness directions. For Si, SiC film and SAMs film on surfaces, larger normal forces lead to smaller friction coefficients and cross roughness pattern have a smaller friction coefficient than that of straight roughness pattern. In addition, ODS film can decrease the friction coefficient on cross topography with relative small roughness value more effectively than can straight topography of SiC surfaces.
PDF417 Barcode and Digital Anti-Fake Technology in Applications of Cigarettes
Authors: Wu Gao Feng , Li Jun Xiang , Wang Jian Xin
Published: November 2012

Principle of barcode technology was analyzed. After introducing the characters and applications of PDF417 two-dimensional barcode, we presented an anti-counterfeiting application of PDF417 barcode combining digital anti-fake technology in the field of cigarette.
Design and Implementation of Electronic Jacquard Cylinder
Authors: Jin Ji Min , Yu Yuan Zheng , Jin Ze Xiong , Zhang Bai Chun
Published: November 2012

An innovative electronic jacquard cylinder has been developed by combining work principle of conventional jacquard cylinder and advanced electronic technology to save the cost of pattern card, and to dramatically increase production efficiency by shortening the period of preparing new patterns. The paper illustrated the design procedure of the control system and also solved the radiating problem of the electronic jacquard cylinder by analyzing the factors of heating. The feedback from clients showed that after a non-stop running of 24 hours at an ambient temperature of 35°C, the cabinet temperature has never exceeded 48°C, which satisfied the design requirements.
Piezoelectricity-Based Energy Harvesting from Mechanical Vibration
Authors: Fan Kang Qi , Wang Bo , Huo Hai Dong
Published: November 2012

Harvesting energy from the environment has been widely investigated to power and maintain low-power devices. This paper reviews the potential energy sources, piezoelectric conversion mechanism, recently proposed piezoelectric energy harvesters (PEH), and micropower management circuits. It can be concluded that the output power of PEH is still comparatively small, especially when the ambient excitation frequencies deviate from PEH’s resonant frequency. Future work should focus on tuning or widening the operate frequency of PEH so that it can match the ambient vibration frequency at all time. Moreover, flow energy harvesting techniques compatible with MEMS techniques demand in-depth study to facilitate the fabrication of micro PEHs.
Study on the Dynamic Models of Systems Biology from the View of Engineering
Authors: Liu Chen , Liu Xiao Yan
Published: November 2012

From the view of engineering, based on expatiating the features of systems biology, the paper discusses the workflows and the research emphasis of systems biology. It also explains how to model and analyze the dynamic process of signal transmitting network for a biological system by an example. Based on the complexity and uncertainty of the mathematical model, the right methods are chosen to realize the effective estimation of state variables and model parameters for the biochemical pathway.
Design of Piezoelectric Actuator Based on Adaptive Projectile
Authors: Yin Jian Ping , Zhang Hong Cheng
Published: November 2012

Adaptive projectile is intelligent ammunition that adopts optical, mechanical, electrical, material and other high-tech and takes simple guidance or adaptive way of trajectory. It can sensitively recognize the target and automatically attack the target. Aiming at the requirements of the adaptive projectile, a novel piezoelectric actuator is designed in this paper. Through certain technology, ceramic rod is made by piling up and sintering piezoelectric ceramic chip, and four ceramic rods are evenly fixed along the circumference on the backplane of the actuator, then the four ceramic rods are applied with different size, positive and negative voltage, the linear displacement is coupled by spherical linkage and angular displacement can be output at the predetermined position of the cross circumference. Based on the design, the mechanical model and piezoelectric heap coupling mathematical model of actuator are made. After calculating, piezoelectric ceramic heap of type PST150/14/120VS20 should be used. In theory, under the condition of static state and no-load, a maximum angular displacement output of 4.5 degrees can be achieved. After numerical simulation, when the head angle is 4.5 degrees, the range extending rate of the adaptive shell can reach 80%.
Precision Control of Magnetic Drive Actuator Used for Laser Cutting with Compensation of Zero Point of Displacement Sensor
Authors: Zhang Xiao You , Chu De Qiang , Shinshi Tadahiko , Fukuoka Teruaki , Nakai Takahiro
Published: November 2012

This paper describes a precision control method for a magnetic drive actuator used for the laser cutting to realize high speed and high accuracy machining. Firstly, a zero bias current method is applied to drive the electromagnets to achieve a high-precision and long-stroke of the actuator. Secondly, a compensation method of the zero point of the displacement sensors is presented to prevent the generation of the disturbance force produced by the elastic hinges. Finally, the positioning performance of the actuator is evaluated through experiments and the experimental results show that the actuator has a positioning resolution of the order of micrometer, a bandwidth greater than 130Hz, and a positioning stroke of 1mm.
Design and Analysis of a Microgripper Based on Smart Materials
Authors: Yu Yue Min , Ji Xian Sheng
Published: November 2012

Smart materials are a group of solid-state materials whose geometric shape can be related to an energy input in the form of heat, light, electric field, or magnetic field. In the application of active materials to electromechanical energy conversion, electrical energy may be input to the material and the resulting deformation of the material can be used to move a load. The most common smart materials are piezoelectrics, magnetostrictive, and SMAs. In this paper, a microgripper is designed based right angle flexure hinge and driven through piezoelectric ceramic stack. The calculation formulas of amplifying ratio and natural frequency of the microgripper structure were derived. From the analysis, the maximum stress is 147Mpa that under the allowable stress of 65Mn. It can work in a stable status.The results indicate that, the microgripper all are satisfy the need of design .
Design and Simulation of Speed Limit Controller Based on Fuzzy Logic Inference
Authors: Liang Xin Rong , Wang Di Qian
Published: November 2012

Speed limit control is of great importance in freeway traffic control. This study aims to determine the reasonable speed limit through the application of a fuzzy inference method. Firstly, the components of a fuzzy logic controller are formulated. Then the influential factors of speed limit control are analyzed and the speed limit controller based on fuzzy logic is designed according to such information as the number of vehicles on the freeway, the road grade, and the weather conditions. Gauss, g-bell and triangle curves are used for the membership functions of the fuzzy variables. The rule base including 45 fuzzy rules is also established. Finally, the speed limit controller is simulated. Simulation results show that the speed limit values are reasonable. Fuzzy inference method provides a novel and practical way to realize speed limit control.
The Exploration of Evaluation Method about the Driving Electromotor Acoustic Comfort of the Pure Electric Vehicles
Authors: Yang Ming Liang , Ding Wei Ping
Published: November 2012

The driving electromotor noise of a pure electric bus was taken as the evaluation object in this paper. The noise signals were gathered by dual channels and to simulating human auditory by synthetic stereo, and were processed into a series of noise samples for human subjective testing generated according to the 3dB differential progressive attenuation of noise sound pressure level. Then the author investigated the human body comfort/discomfort subjective feelings under various noise samples through the high fidelity audio playback, described the subjective feelings with ‘descriptor’, and quantified the subjective feelings with scores at the same time. On this basis, the correlation of subjective feelings between acoustic comfort and discomfort were revealed, and the noise sample sets corresponding with comfort feeling were found out. Based on these, an evaluation method of electromotor acoustic comfort was established.
Structure Improvement and Experiment Validation for a Car Side Impact
Authors: Sun Xi Long , Wang Deng Feng , Lu Fang
Published: November 2012

A side impact simulation model for a car was built according to China New Car Assessment Programme(CNCAP) and the 120ms response of the side impact was calculated by Pam-Crash software. The side security performance of base model was evaluated with the assessment criteria for the side security which was defined base on the experience and development requirement. Because of the stiffness insufficiency of base model, the body side structure was improved by multiple optimizations to improve the side security performance of body-in-white. The optimal scheme was validated by the test results, and the side security performance satisfies the production development requirements. The reliability and accuracy of the side impact model were validated according to the comparison analysis of test and simulation.
The Effects of Truck Structure Parameters on the Aerodynamic Drag and Optimization
Authors: Yang Xiao Long , Tang Ji Xiang
Published: November 2012

The influence of different truck structure parameters on the aerodynamic drag is studied. Saving energy and reducing emissions are two worldwide issues. Decreasing aerodynamic drag for the truck becomes more and more important, which is investigated in this paper based on the CFD method. Three structure parameters of a real truck model are studied, including the height difference between the cab fairing and the trailer, the gap between the cab and the trailer, the angle at the bottom of the truck tail. Their impact on the flow field, pressure and drag are investigated. The results show that there is complicated nonlinear relationship between the structure parameter and the aerodynamic drag. A comprehensive optimization of those parameters can effectively reduce the aerodynamic drag. In this paper a 15% decrease of aerodynamic drag is observed by optimization.
Modal Testing Analysis and Dynamic Properties Estimate on the Exhaust System of a Medium-Sized Bus
Authors: He Hai , Zhou Hong , Wang Si Le
Published: November 2012

At the beginning of this paper, we made some brief introductions on the modal analysis theory. In allusion to the vibration conditions of a medium-sized Bus’s exhaust system, LMS Test.Lab testing software was used and MIMO method was selected to conduct the modal testing. According to the synthesized modal analysis on the X, Y, Z directions of the gauging points, parameters such as the modal frequencies and shapes could be obtained. Then with modal shapes of the first 9 orders, we made some analysis and estimates to the dynamic properties of the exhaust system.
Research on Immersive Virtual Assembly Technology
Authors: He Liang Li , Wei Fa Yuan , Yang Yun Bing
Published: November 2012

Considering the conventional products development is a sequential process, many assembly problems can be fully exposed only when the actual produced products are during the process of assembling; the immersive virtual assembly of man-in-the-loop is proposed. The principle of this VA is put forward firstly. the environment, key techniques and application of virtual assembly are researched. Based on the Catia V5 and virtools, a prototype system of virtual assembly is built and validated. The result indicates that this system is able to apply to engineering.
Study on Key Technology in Making Rice by High-Altitude Pressure Cooker
Authors: Zhang Xiang Hong , Yang Han , Li Yan Jun , Yin Li Jun , Shen Can Duo
Published: November 2012

Proceeding from the starch pasting in high altitude, multiple factors such as pressure, moisture and temperature are analyzed carefully, which break through traditional technology, super-huge type pressure cooker with composite bottom equipping with 6 safety protection devices and matching application method are developed, which resolved the technical problems of cooking rice in plateau such as easily sticky, half-cooked and dry on top and watery at the bottom completely.
Management of Cloud Computing Resources for Business, Industry, and Manufacturing System
Authors: Yeo Sang Soo , Jeong Hwa Young , Choi Hae Gill
Published: November 2012

Cloud computing is new trend in all area using the computer. The cloud computing provide efficient function that the user is able to access their program, system, and platforms at anytime, anywhere. Therefore, in this paper, we aim to make architecture of management process for cloud computing resources. The architecture consider the function by multi-tier layers that user can access the resources whatever they need or want to operate without no limit of location and time.
Behaviour of Dissimilar Friction Welds with the Introduction of Silver Interlayer
Authors: Kannan P. , Balamurgan K. , Thirunavukkarasu K. , Sreenivasan M.
Published: November 2012

The present work discusses about the introduction of silver interlayers in dissimilar friction welding process. Thecharacteristics of silver interlayer influenced friction weld are compared with the silver free dissimilar friction welding process. The parameters which include temperature, heat generated, pressure, friction coefficient and width of the softened zone are derived for the silver enriched welds. These derived parameters are compared with those of the silver free welds. From this comparison it is found that the introduction of silver interlayers decreases heat generation during welding, friction coefficient and produces narrower softened zone regions. And also the width of the softened zone decreases which in turn increases the strength of the weld if the silver interlayer is formed at the bondline. From all the considerations it is concluded that, stable and strong friction welds can be produced by the influence of silver interlayer in dissimilar friction welding.
A Design Strategy for Multi-Agent Based Industrial Intelligent Monitor Processing
Authors: Wang Hai Rui , Li Ya , Wang Jian Ying , Bi Gui Hong , Zhang Zhi Bin
Published: November 2012

In this paper, a design issue related to the multi-agent based industrial intelligent monitor processing system (IIMPS) in distributed substations is proposed. Multiagent-oriented programming might be the new trend of software programming after object-oriented programming. Multagent-oriented approach uses a higher-level point of view to see the problems. We comment on the characteristics of industrial monitor problems and claim that the multi-agent system (MAS) is a good choice to solve problems with these characteristics. The proposed multi-agent based IIMPS is able to analyze industrial all real messages to assist human operators in identifying associated events. A prototype MAS with JAVA-based GUI used to integrate the existing SCADA system and as the user interface for operators to perform will be discussed in the paper.
Research and Design of Customer Analysis System Based on Clustering Mining
Authors: Xu Jing Lei , Liu Xi Yu
Published: November 2012

Company customer analysis system is designed and implemented based on clustering mining technology. Customer preference segmentation model is built by using the K-medoids clustering method, the customer are divided into several groups effectively. Through a combination of the decision tree and the logistic regression method, the customer loss early-warning model is constructed. The practical results show that the designed system has an excellent performance.
Application of Oil Analysis Techniques to Diesel Engine Condition Monitoring
Authors: Zhang Yong Guo , Jiang Xu Feng , Wu Xiao Wen , Ying Zong
Published: November 2012

In order to verify the validity of oil analysis for heavy diesel engine condition monitoring, the lubricating oil were sampled from the lubricating system of the domestic diesel engines, and then were tested by oil analysis (including contamination detection, periodic sampling test and ferrography technology). The results showed that oil analysis could monitor the lubricating oil contamination and mechanical wear condition to make diesel engines avoid early mechanical failure.
A Evaluation Method Based on Regression Analysis of Vehicle Detection for Clutch
Authors: Fan Di Hu , Lin Min , Guo Bin , Lu Yi
Published: November 2012

In the real venicle testing, evaluating the mechanical properties of the clutch just depend on the related characteristic point on mechanics characteristic curve at present, The evaluation method failed to make full use of the informantion included in the characteristic curve and may lead to miscalculation. According to the stuation, by parameter transform can get clutch undamped mechanical characteristic. Through the method of regression analysis, then the qualify can be judged by comparing the test curves of clutch undamped mechanical characteristics with the curve of modeling. Experimental results show that the new evaluation method is feasible.
Structural Optimization of Suspension Mechanism Based on APDL
Authors: Zheng Xi Jian , Han Yong Shang , Xie Zheng Yi , Ma Jin Xia
Published: November 2012

In this subject, there were the Analysis Parametric Design Language (APDL) and optimization of the design process to be introduced. Based on APDL and optimization design module of ANSYS, the structure of suspension mechanism was optimized and the extraction of the maximum stress of the beam structure was realized according to the actual work of the large load temporarily installed suspended access equipment. The optimization of product structure was achieved and the utilization of materials was improved by the minimum structural quality of the suspension mechanism as the optimization objective. The study could provide reference for the similar products on design and development.
Analytic Study of Non-Newtonian Double Layer Coating Liquid Flows in Optical Fiber Manufacturing
Authors: Kim Kyoung Jin , Kwak Ho Sang
Published: November 2012

In mass manufacturing of optical fibers, the wet-on-wet polymer resin coating is an efficient process for applying double layer coatings on the glass fiber. This paper presents an analytic study on the behavior of non-Newtonian polymer resins in the double layer coating liquid flow inside a secondary coating die of the optical fiber coating applicator. Based the approximations of fully developed laminar flow and the power law model of non-Newtonian fluid, the coating liquid flow of two immiscible resin layers is modeled for the simplified geometry of capillary annulus, where the surface of glass fiber moves at high fiber drawing speed. The effects of important parameters such as non-Newtonian fluid properties, the coating die size, and fiber drawing speed are investigated on the resin velocity profiles and secondary coating layer thickness.
Frequency-Domain Spectral Element Model of a Uniform Spinning Shaft
Authors: Lee Usik , Jang In Joon , Park Il Wook
Published: November 2012

This paper presents a spectral element model for the spinning uniform shaft represented by the Timoshenko beam model. The bearing-supports are represented by equivalent springs. The variational approach is used to formulate the spectral element model from the frequency-dependent shape functions derived from exact wave solutions to the governing differential equations.
Capillary Flow in the Vane-Type Surface Tension Tank: Drop Tower Test Results
Authors: Li Jing Hao , Chen Xiao Qian , Huang Yi Yong
Published: November 2012

The paper studied capillary flow in asymmetry interior corner in the vane-type surface tension tank, and calculated it by analytical solution. Proposed a variable of equivalent corner angle to calculate the parameters of meniscus, and then analyze the capillary flow at asymmetry interior corner. A vane-type surface tension tank model is tested at drop tower to observe the capillary flow at asymmetry interior corner in microgravity condition. The test results are compared with analytical solution results to verify the theory of interior corner flow.
Study on the Natural Frequency of the Pipe with Various Depths and Directions of Crack
Authors: Gao Pan , He Yu Min , Zhang Xiao Long
Published: November 2012

Pipe can be regard as a dynamic system which is composed of quality, damping and stiffness matrix. The natural frequencies of the system will change when a crack occurs on the pipe. This paper studies the influence of a crack with various depths and directions on the natural frequencies of the system. Results of this paper give an experimental foundation for crack prediction.
Numerical Simulation of Steady Air Injection Flow Control Effects on a Transonic Axial Flow Compressor
Authors: Benhegouga Islem , Yang Ce
Published: November 2012

In this work, steady air injection upstream of the blade leading edge was used in a transonic axial flow compressor, NASA rotor 37. The injectors were placed at 27 % upstream of the axial chord length at blade tip, the injection mass flow rate is 3% of the chock mass flow rate, and 3 yaw angles were used, respectively -20°, -30°, and -40°. Negative yaw angles were measured relative to the compressor face in opposite direction of rotational speeds. To reveal the mechanism, steady numerical simulations were performed using FINE/TURBO software package. The results show that the stall mass flow can be decreased about 2.5 %, and an increase in the total pressure ratio up to 0.5%.
Integrated Quantitative Analysis of Customer Satisfaction Based on Kano's Model
Authors: Fan Zhi Jun , Jiang Zhao Liang
Published: November 2012

The satisfaction of customer requirements (CRs) is the objective of product configuration. A methodology Based on the Kano's model was proposed to explore customers' stated needs and unstated desires and to resolve them into different categories which have different impacts on customer satisfactions (CSs). The customer satisfactions are classified into group satisfaction and individual satisfaction, and each of them has three types with Kano theory. Group requirements items were selected frequently by the same kind of customers. Individual requirements were specified by the customer himself. Based on a combination of group satisfactions and individual satisfactions, the integrated satisfaction was determined. A case study is provided to illustrate the effectiveness of the presented method.
Parameter Mapping Method for Multi-System Design of Automotive Chassis
Authors: Jiang Wu Hua , Wang Qi Dong
Published: November 2012

Automotive chassis is an engineering system whose successful design requires harmonization of a number of objectives and constraints that, in principle, can be modelled as a constrained multidisciplinary design optimazation in the space of design variables. However, accurate recognition and effective management of coupling relationships among multisystem design models is fundamental to implementation of Multisystem Design. In view of the demand of complex automotive chassis system design, A model of multidisciplinary design optimazation(MDO) is built. Subsequently, The genetic algorithm is used for parameter recognition and representation among multidisciplinary model solvers (design systems). The parameter mapping approach enables integration of coupled disciplinary model solvers, and effective accelerates coordination of multidisciplinary computation processes. The parameter mapping approach has been applied to automotive chassis design, and which significantly improves the efficiency and quality of design.
Finite Element Analysis on Energy Dissipation Ability of Geo-Materials under Impact Load
Authors: Liu Wen Bin , Yan Shu Wang , Wang Wu Gang , Yu Miao
Published: November 2012

The non-linear finite element program Ls-DYNA/ANSYS is applied to simulate numerically the capacity for the geo-materials to dissipate the energy induced by the falling objects. The calculation results for the crushed stone coincide well with those recommended by the current Code of《DNV-rp-f107_2010》, which is on the basis of experiment data, implying the feasibility of using this program to estimate the energy dissipating capacity of the geo-materials. Because little research has been performed with clay soil, the program Ls-DYNA/ANSYS is used to predict the energy dissipating capacity of clay layers.
Mechanical and Electrical Coupling Vibration Characteristic Analysis of Power Train System for Electric Driven Vehicle
Authors: Yu Peng , Zhang Tong , Liu Pu Hui
Published: November 2012

Determine the electrical and mechanical coupling modeling and analysis method of power train system for electric driven vehicle. Mechanical vibration mathematical model, rotation DQ axis mathematical model of PMSM and electrical-mechanical coupling model of Power-train System for a new energy vehicle are given. Numerical solution and parameter sensitivity analysis has been done. Consider the impact of temperature change, iron core magnetic saturation, motor torque fluctuations and load torque fluctuation on the system.
Web Service Based Process for Dynamic Manufacturing
Authors: Jeong Hwa Young , Choi Hae Gill
Published: November 2012

Manufacturing system has changing their technology to service based application. In the contents, web service technique can be a solution for their needs. Web service can provide various business logic, process, application for manufacturing system’s software over the internet. In this paper, we propose web service based process model for manufacturing system. The sample target system is IC test Handler, semiconductor device test equipment. The main application consists of 4 services; operational process, GPIB test process, Communication process, and Data management process.
Exploration on Aerodynamic Noise Characteristics for Control Valve of Steam Turbine
Authors: Fan Li Hua , Cai Guo Huang
Published: November 2012

The flow within the control valve is rather complicated, which is induced by a variety of pneumatic sound sources, including turbulent mixing, turbulence and boundary layer interaction, shock wave, etc. Through presenting the aerodynamic noise generation mechanism, we introduce several classic prediction methods for control valve of steam turbine, and then give the suppression and elimination advises of the aerodynamic noise of the control valve. It mainly involves two approaches, the direct method - sound source approach method and the indirect method–the acoustic path approachment method, and it can provide important guidance to control the noise level for steam turbine control valve.
Short-Term Wind Power Forecasting Based on SVM with Backstepping Wind Speed of Power Curve
Authors: Yang Xi Yun , Wei Peng , Liu Huan , Sun Bao Jun
Published: November 2012

Accurate wind farm power prediction can relieve the disadvantageous impact of wind power plants on power systems and reduce the difficulty of the scheduling of power dispatching department. Improving accuracy of short-term wind speed prediction is the key of wind power prediction. The authors have studied the short-term wind power forecasting of power plants and proposed a model prediction method based on SVM with backstepping wind speed of power curve. In this method, the sequence of wind speed that is calculated according to the average power of the wind farm operating units and the scene of the power curve is the input of the SVM model. The results show that this method can meet the real-time needs of the prediction system, but also has better prediction accuracy, is a very valuable short-term wind power prediction method.
Numerical Simulation of Smoke Exhausts Function of Roof Vent in Compartment Fires
Authors: Li Jin Mei , Li Qiang , Zhang Jia Qing , Li Chang Hai
Published: November 2012

The influence of roof vent area and fire source area on smoke exhaust function of roof vent is provided in this paper. Numerical simulation results show that the temperature of hot smoke layer increases with the increases of heat release rate and decreases as the roof vent area increases. For the evaluation criterion with temperature difference, with the increase in roof vent area and fire source area, the smoke exhausts function of roof vent was enhanced. But for the evaluation criterion with efficiency of smoke exhaust, the smoke exhaust efficiency increases as the roof vent area increase and decreases with the increases of fire source area.
A Quality Attribute for RFID Manufacturing System
Authors: Jeong Hwa Young , Choi Hae Gill
Published: November 2012

RFID is used very wide for manufacturing system, supply chain system, and others. RFID uses the chips or tags to store electronic product codes (EPC) and he tags have radio transceivers using which they transmit the product or device information using EPCs to the devices that probe these tags. In the contents, in order to apply RFID technique to their system (manufacturing system) efficiently, to identify and know the accurate quality attributes for RFID enable system has necessary. In this paper, we propose the quality attributes for RFID enabled manufacturing system. For this work, we extract the quality criteria from similar attributes of the standards such as ISO/IEC 9126 and IEEE 1451.
The Study of Digital DC-DC Converter of Electric Vehicles
Authors: Piao Chang Hao , Li Yu Sheng , Qiao Hong Tao , Teng Cong
Published: November 2012

This paper presents a two-stage DC-DC converter for electric vehicles that controlled by using a digital MCU with a lag algorithm. Because the fuel vehicle causes many environmental issues, the electric vehicle becomes a new tendency in vehicle fields. The voltage of power battery is very high and can’t charge for lead-acid battery directly, so DC-DC converter is an essential device. In order to absorb the advantage of digital converter and meet the requirement of widely range input voltage, a digital DC-DC converters for electric vehicle is proposed. The BUCK and half bridge topology was analysis in detail and chosen for the DC-DC converter. A digital DC-DC converter system which includes the hardware and software was designed. The sample circuit, driven circuit and how to make the power transformer is described in detail in hardware design. The software mainly consist the voltage regulate program and CAN communication program. A lag compensator was designed for the voltage regulate. A prototype was made and test in the charge of the lead-acid battery. The result shows the correctness of the topology selection and circuit design. It proved that the DC-DC converter can charge the lead-acid battery within working voltage of power battery and meet the specification basically.
Control-Relevant Discretization of Nonlinear State Delay Systems Using the Matrix Exponential Algorithm
Authors: Zhang Yuan Liang
Published: November 2012

In this paper, a new discretization method to obtain the sampled data representation of the nonlinear state delay control system is proposed. This discretization method is based on the matrix exponential computation. The mathematical structure of the new discretization scheme is explored. Then it is applied to obtain the discrete form of the nonlinear state delay continuous systems. The resulting time discretization method provides a finite dimensional representation for nonlinear control systems with state delay, thereby enabling the application of existing controller design techniques to such systems. The performance of the proposed discretization procedure is evaluated by means of the simulation study. In the simulation various sampling rates and time delay values are considered. The results demonstrate that the proposed discretization scheme can assure the system’s accuracy requirements.
The Safety Research for Face Recognition System Based on Image Feature and Digital Watermarking
Authors: Li Fei , Wang Yuan Yuan
Published: November 2012

Abstract: In order to solve the easily copied problem of images in face recognition software, an algorithm combining the image feature with digital watermark is presented in this paper. As watermark information, image feature of the adjacent blocks are embedded to the face image. And primitive face images are not needed when recovering the watermark. So face image integrity can be well confirmed, and the algorithm can detect whether the face image is the original one and identify whether the face image is attacked by malicious aim-such as tampering, replacing or illegally adding. Experimental results show that the algorithm with good invisibility and excellent robustness has no interference on face recognition rate, and it can position the specific tampered location of human face image.
Training Mode Reform of Application Excellence Engineer in Mechatronics Subject Field for Local University
Authors: Hu Hong Sheng , Cao Jian
Published: November 2012

This paper was based on the innovation mode of application excellence engineer’s education, and a new talent cultivation mode was explored for local university’s application excellence engineer in order to be adapting to regional economic and social needs and the development of characteristic industries, and highlight its professional characteristics. In this paper, engineering knowledge, engineering quality, engineering ability, teamwork spirit and professional ethics training were selected to construct as the main thread. Besides, 3+1 university-enterprise cooperation talent cultivation system, a new talent cultivation project based on course platform, skill platform and comprehensive quality platform and a three-stage multi-level experimental and practical teaching system were all researched, which would provide some valuable examples of the applied innovative talent’s cultivation for local university during the regional advantage characteristic industry transformation and upgrading and the development of strategic emerging industries.