bluuebunny/crossref_metadata_2025 huggingface dataset:
Configuration Software-Based Control System for Wine Production
Authors: Zang Hua Dong
Published: September 2011

According to request of the control system in the wine fermentation process at a winery, the design plan of the control system based on Siemens PLC and King View is put forward. Lower processor was composed by series CPU module and ET200S module of Siemens S7-400 PLC in that control system; moreover, centralized management and real-time monitoring of collected data are carried out through the upper processor that adopts industrial computer and the software of King View. The practice shows that the control precision and the reliability of the control system of the wine fermentation process both have met the needs of the control.
Impact of Long Hydraulic Pipeline upon Performance of Hydraulic Control System
Authors: Zhao Ya Nan , Du Hong Wang , Li Yu Mei , Luo Xiang , Liu Gang
Published: September 2011

In ocean exploitation, long hydraulic pipelines are usually applied. Using SimHydraulic software, the model of hydraulic system including hydraulic fluid, pump, hydraulic cylinder, directional control valve, relief valve, accumulator, long supply pipeline and return pipeline, is established. The position of the cylinder piston is measured by position sensor, while the supply pressure of the cylinder and the system supply pressure are measured by pressure sensors, the directional control valve is controlled by an on-off signal. The simulation was carried out, the impact of long hydraulic pipeline on system performance is also analyzed.
Study on Pilot’s Visual Information
Authors: Liu Wei , Yu Chang , Zhuang Da Min , Yuan Xiu Gan
Published: September 2011

Objective: The aim of this paper is to study the system problem to help pilots get the information which is useful among large amounts of data; Method: A new experiment on the limit of data strobe signal was built; Result: On the basis of theoretical consideration and analysis of experimental results, the effect on pilots' cognition and the design of display/control system was initially explained; Conclusion: The results showed that the increase of limit of data strobe signal can be accepted by objects; limit of data strobe signal will increase quickly by using digital or simple characters instead of words, but this will slightly increase performance errors; interruption of information doesn’t affect too much on limit of data strobe signal.
Design of LabView-Based System of Noise Measurement on Gear Box
Authors: Wei Xie Ben , Zheng Wen , Lin Rong
Published: September 2011

The gear box is widely used in rotating machinery equipments, also it is a key component of the machinery equipment. Gear box, once it is failure, will cause serious machinery equipments failure, so the condition monitoring and fault diagnosis research of the gear box is very necessary. Its state of running and fault diagnosis can be acquired through measuring and analysis the noise of gear box. A feasible on-line LabView-based system of noise measurement on the gear box is designed by Using NI's hardware and other ordinary sound-tested equipments in teaching laboratory, as well as its applied effect is confirmed in practical test. This system realizes the signal acquisition and analysis in the online and offline conditions. It has the following functions: multiple data collection and preservation, historical data query, gearbox online monitoring and vibration quantity value alarming, etc. So, the noise detection system has very good application prospects in the actual noise detection and analysis of the gear box.
Investigation of Motor-Generator Integration System for Electric Vehicle Based on Induction Motor and Fuzzy Control
Authors: Xing Zhi Long , Liu Yang , Liu Yun Feng
Published: September 2011

Aiming to solve the energy saving problem in modern electric vehicle, we propose a motor-generator integration control system based on the induction motor and the fuzzy control theory in this paper. A motor-generator hardware platform is built up using the four quadrant characteristic of AC induction motor. The AC induction motor works both as driving motor of the electric vehicle and as well as the energy recovery generator. Specifically, the fuzzy direct torque control strategy is adopted in the motor state, and fuzzy instantaneous torque control strategy in power generation state. A simulation is carried out to analyze the practicality of the proposed control method, the simulation results show that the fuzzy torque control technology is well performed. Finally, a simulative energy recovery experimental platform is built up to test the proposed integration control system, and results shown that the efficiency of energy recovery could be up to 97.3%.
Green Design and Manufacturing Technology on Hoisting Device of the Silt Coal Car Loader
Authors: Mao Ping Huai , Chen Run Dong , Zhai Bing
Published: September 2011

This paper analyzes the common faults of the YMZ light silt coal car loader's hoisting device in working process, and supplies several solutions; Simultaneously, it mainly introduces two types of manufacturing technique about hoisting device's parts design and improvement in practical application and appraises the effect of the green design and manufacturing technique in the working device; The article concludes that improved workpiece performance is of great practical value; As the designers are designing the products, only when they should combine the new design concept and the mode of thinking with the green design concept, and attach importance to the innovation of science and technology during the designing process as well, and finally bring into play the advantages of the technology, can they produce safe, powerfrugal, efficient and shapely green products which are popular with people at home and abroad.
Simulation Analysis of Wheeled Vehicle Skid-Steer
Authors: Wang Yue Fang , Dong Xiao Rui
Published: September 2011

In this paper, the wheeled vehicle is regard as a multi-rigid-body system and simulation model of the vehicle is established firstly by using dynamics simulation software of mechanical system ADAMS which is used most widely in the world. Secondly, through setting the initial condition and inputting various parameters, simulation analysis of skid-steer during the unilateral braking process and swerving braking process that the vehicle runs roundly in constant speed of 10km/h and 20km/h respectively is performed. In addition, vehicle velocity curves are recorded, vehicle yaw angular velocity curve are showed, Side accelerated speed curve is seen, the turning track curve of centre is drawn and the results are contrasted. Finally, some conclusions are reached that the vehicle minimum turning track radius decrease immensely than the radius which does not adopt unilateral braking and vehicle velocity could be controlled in a small velocity rage when vehicle is steering braking.
The Research and Application of the Internal Combustion Engine Power Plant--Rotary UPS Monitoring Systems
Authors: Sun Xiao Jing , Wang Xing Gui , Wang Chun Ning
Published: September 2011

The Internal Combustion Engine Power Plant and Flywheel Battery were the two primarily compositive units of the Internal Combustion Engine Power Plant --Rotary UPS, among them the Internal Combustion Engine Power Plant ensured the continuous power supply to the load after the breaking of the mains supply, the Flywheel Battery ensured the uninterruptible continuous power supply to the load when mains supply switched to the Internal Combustion Engine Power Plant, so the paper started with the two units, Introduced the control system structure and principle, and focused on discussing the method of achieving the Internal Combustion Engine Power Plant --Rotary UPS telecommunication by Ethernet. The method had been applied in correlative production. The practice showed that it was convenient for usage and high reliability.
Object Detection Based on the Frame Difference and Cellular Automata
Authors: Feng Xiao Liang , Xu Xue Jun
Published: September 2011

To give a relative accurate detection result in the computer vision which apply in the Video Surveillance and so on. A method based on the auto collects the seeds and then use the Cellular atuomata to subtract the moving object. Firstly we use the frame difference image to find the moving region and give the seeds of the foreground and background. Then we use the grow cut of CA to cut the frame into the foreground and background. The experiment is shown our seeds can give more accurate information of the foreground and get a relative precise result.
Optimizing Design of Real-Time Spatial Moving Target Tracking System
Authors: Liang Dong Sheng , Liu Zhao Hui , Liu Wen
Published: September 2011

Achieving the detection and tracking of moving targets has been widely applied in all fields of today's society. Because of the shortcomings of traditional video tracking system, this paper proposes a novel method for designing video processing system based on hardware design of FPGA and DSP, and moving target in video can be detected and tracked by this system. In this system, DSP as the core of the system, it mainly completes the processing algorithms of video and image data, FPGA as a coprocessor, responsible for the completion of the processing of external data and logic. The hardware structure, link configuration, program code and other aspects of system are optimized. Finally, through the experiment, the input frame rate of video is 40frames/s, and the image resolution is 512pixels × 512pixels, median 16bites quantitative image sequence, the system can complete the relevant real-time detection and tracking algorithm and extract targets position of image sequences correctly. The results show that the advantage is that this system has powerful operation speed, real time, high accuracy and stability.
Memory Depth of Processing Theory in Network Analysis of Design Tab
Authors: Liu Wei , Yu Chang , Zhuang Da Min , Yuan Xiu Gan , Huang Dao Li
Published: September 2011

Memory depth of processing theory suggests that the factors affecting memory has nothing to do with the time but the processing level. Network label is the emerging Web 2.0 in the navigation mode. In this paper, memory processing of in-depth perspective of a comparative test was designed to explore the network of label design, and give the theoretical proof to the direction of its development.
Dynamic Analysis of a New Type of Hydro-Viscous Drive Winch
Authors: Hou You Fu , Wang Dao Ming , Meng Qing Rui , Du Bo
Published: September 2011

A new type of hydro-viscous drive (HVD) winch was designed by combining with differential gear train and HVD. It could meet the requirements of inclined hoist. In order to achieve good control properties, though dynamic modeling and simulation, the output moment curves of HVD device were obtained, then, the working processes of starting, braking and lowering weight were analyzed. Research results provide a theoretical basis for making control strategies for HVD winch. Finally, the starting process of HVD winch was studied in the experimental device; the result indicated that the starting curve of HVD winch efficiently in accordance with Harrison curve.
Performance Characteristics Analysis of Supercritical Boiler Water Wall
Authors: Cao Rui
Published: September 2011

The key technology of supercritical boiler is water wall, this paper is mainly analyzed the dangerous working conditions of supercritical boiler water wall. On the one hand, from working substance’s point of view, we adopt traditional pressure drop method to judge the heat transfer deterioration position under sub-critical pressure; on the other hand, we use temperature test point combining calculation formula of wall temperature to judge the heat transfer deterioration position under supercritical pressure, and combining improved zoned thermal calculation method to get wall surface thermal load distribution map. Through an instance calculation, when boiler unit under 40% of full load, the maximum thermal load is near 20 meters of furnace height and when it under 100% full loads, the maximum thermal load is near 30 meters of furnace height. So we can control all kinds of heat transfer deterioration position through changing hydrodynamic condition and ward off the highest thermal load area, which is significant to operation.
A Study of the Automatic Formation Line of Li-Ion Power Batteries
Authors: Han Liang , Xiao Feng , Chu Xin Pan , Xue Jun Feng , Chen Qi Biao , Lei Min , Zhang Lei Xiang
Published: September 2011

Li-ion battery is used widely in many industrial areas, and formation is a necessary process in battery manufacture. After formation, the performance of Li-ion power batteries can be activated. In the process of production, the key technology in the formation has been changed. The technology of formation and holding independently for each battery is turning into the formation after being clamped and then holding now. Therefore, the design of the automatic production line must base on the battery groups after being clamped. This text will introduce a new production line for the formation of Li-ion battery, mainly discuss the formation of clamped batteries, and how to realize the automation of the production line. The line uses the three-dimensional multi-layer frameworks, speed-fold chains and stoppers. The speed-fold chain is a new type of conveyor chain, and known as "flexible manufacturing unit". The battery groups can be stopped in the manufacturing line by the stoppers, and then they can be charged or discharged. The line can be connected by the lifting machine.
Underactuated in-Pipe Robot for Moving inside Underground Oil Pipelines
Authors: Jiang Xu Dong , Jiang Sheng Yuan , Hu Zhi Yong , Gao Ying Hua
Published: September 2011

Composed of tri-axis differential mechanism and adjustable flexible pipe-diameter adaptability mechanism, an underactuated wheeled in-pipe robot is developed to avoid the motion interference during moving in elbow. The experiment system is established to evaluate the robotic differential performance. The experimental results show that the proposed robot has several advantages such as reliable differential performance and pipe-diameter adaptability, and hence verify that the present underactuated method is an effective way how to prevent a wheeled in-pipe robot from motion interference.
Buffer and Vibration Optimization of Missile Data Recorder Structure
Authors: Zhang Jing , Jia Hong Guang , Ding Ling , Dong Wen Hui
Published: September 2011

On the analysis of the original data recorder, made several key problems clear when buffer and damping, distinguished between a cushion theory and application field of stress wave theory, the traditional rigid spring-buffer model whose object is to reduce the impact of acceleration that can not accurately describe the elastic force of the part of the actual situation; the stress wave theory is the elastic theory can explain the filter buffer question from the micro-small space, from this designed a composite structure for vibration reduction, which made the dynamic stress of protected component down about one order of magnitude. Optimization with Isight and Ls-dyna, the protected component's dynamic stress down about 69.3% and the data recorder's quality 300g lower, finally passed the Marshall Hammer test successfully.
An Optimal Design Method for Radar Brackets
Authors: Guo Lian Zhong , Yang Ding , Huang Zi Teng
Published: September 2011

The purpose of this work is to present an optimal design method for radar brackets to get the lightest structure with stiffness constraint. Current radar brackets usually have conservative strength and excessive weight which influences the mobility of radar greatly as they are not optimized in the conceptual design stage. In this paper the well-known ESO (Evolutionary Structural Optimization) method based on ANSYS is studied and used as the method to optimize them. To begin with the criteria of ESO method and its implementation method are studied. Then a case of optimization for a phased array radar bracket is studied and at last the optimization result is compared to the result by using WORKBENCH (a commercial CAE software) and the comparison shows that this method has its unique superiority.
Synthesizing Different Preference Information by Fuzzy Programming Method
Authors: Yang Jing
Published: September 2011

Group decision making problems with different forms of preference information are discussed. Firstly, four forms of preference information ( i.e. preference ordering, utility value, AHP judgment matrix and fuzzy judgment matrix) are introduced and the computing formulas are given to transform different forms of preference information into the form of fuzzy judgment matrix. A new method that involves in different preference strength of experts is studied. Then, the assessment of the group priorities is formulated as a fuzzy linear programming problem, maximizing the group’s overall satisfaction to get the group solution. The method can easily deal with missing judgments and different partiality intensity by decision makers. At the end, the feasibility and effectiveness of method is explained by an example.
Evaluation and Analysis on Benefit of College Resources Input of China
Authors: Zhu Xiao Hong
Published: September 2011

From the 1990s, China's higher education has experienced a rapid development, which provides Talents guarantees for Chinese economic rise and the development of social undertakings. Colleges and universities as an important carrier of higher education, attract more investments from national financial departments at all levels, social organizations and students’ families. The college education resource management increasingly becomes a hot social concern, arousing more and more scholars' research interests. Research indicates that the value of education input can be evaluated. In china, the higher education resources are infrequent, and the using efficiency can not be evaluated by analysis educational economic income of individual. This paper did a profound research on benefit of higher education from input angle based on the main components and clustering analysis method in multivariate statistics, using SPSS and R software. The result has prominent theoretical significance and practical value for high education resources management.
An Approach to Reconstructing 3D Solid Model and Generating Orthographic Views from the Two 2D Views Using AutoCAD
Authors: Zhao Hong Sheng , Wu Ya Xian
Published: September 2011

According to the given 2D orthographic views to image the object’s shape is one of the key qualities that engineers and technician must possess. This paper presents a teaching approach with which the teacher can easily, effectively and efficiently teach students how to solve the problems that the object’s shape is required to be imaged and the third view is required to be drawn according to the two given 2D orthographic views. The approach emphasizes integrated and flexible application of Boolean’s set operation of AutoCAD software and basic knowledge of engineering drawing with no needs for complicated computation and 3D rich imagination. It is intended to encourage student’s interest and enthusiasm in creative design using CAD software. And teaching practice has shown this method can improve greatly student’s quality of creative spatial thinking and computer-operating.
Discussion of Quality Management of Large Complex Equipment under the Cross State of Development and Production
Authors: Zhang Xue Cheng , Wang Jia Chen , Sun Xu Ning , Wang Yong Jie
Published: September 2011

The development of large complex equipment takes very long and needs to reduce the time introduced to the market. The cross state of development and production appears frequently because of the tight schedule. The cross may result in instability problems of quality and would delay development schedule ultimately. In order to ensure the quality and schedule, the method and strategy used for the cross state of development and production are discussed in this paper. The main problems caused by the cross situation are analyzed. And then the solution is proposed to the question, that is the management process needs to be infused with more in-depth systems analysis during the early stages and planned using tenets of process control, configuration management and integrated test & evaluation methods. These approaches may accelerate the exposure of technical problems as far to the left as possible. Therefore such management process could help to ensure the quality consistency and schedule under the cross state of development and production.
A Study on the Phenomenological Constitutive Models of AZ80 and AZ31 Magnesium Alloy Forming at Elevated Temperatures
Authors: Xue Yong , Zhang Zhi Min , Wu Yao Jin , Lu Guang
Published: September 2011

Quantities AZ80 and AZ31 magnesium alloy billets were compressed with 60% height reduction on hot process simulator at 150,200,250,300,350,400,450°C under strain rates of 0.001, 0.01, 0.1,1 and 10s-1.A constitutive model with a few parameters is used to characterize the dynamic recrystallization strain softening of AZ80 and AZ31 alloy, which comprehensively reflect the effects of the deformation temperature, strain and strain rate on flow stress.
A Fuzzy Model of Scenario Planning Based on the Credibility Theory and Fuzzy Programming
Authors: Shi Zhong Guo
Published: September 2011

Uncertainty, complexity and paradigm shift are three challenges that are inherent in emerging technologies. Scenarios provide background for decision-making by clarifying possible paths of emerging technologies. Based on the analysis of three basic stages of empirical scenario construction, i.e. analysis phase, subsystem analysis phase and syntheses phase, credibility theory and fuzzy programming are introduced to dissolve scenario planning problems. This paper adopt such research road as (1) measurement of factors’ credibility, (2) analysis of pairwise factors’ compatibility, (3) eliminate incompatible scenarios through pruning rules, and (4) choice of scenarios through fuzzy programming. And then, the choice of scenarios can be conducted by expected value model. In the end, the further research fields are also discussed.
An Experiential Calculation Method to Radial Extrusion Pressure by Floating-Die
Authors: Xin Xuan Rong , Shan Long Long , Liu Xin Cheng
Published: September 2011

By analyzing the rheological behavior and stress to the metal in cross-axle during a radial extrusion with floating-die, establishing a computational model of rigid-perfectly plastic and the stressing model similar to the forward extrusion, and introducing a simple forward extrusion calculation into a complicated radial extrusion calculation, a new calculation for radial extrusion is proposed, then the axial clamping force on female-die and other load parameters are calculated. Through verifying the result by Deform-3D numerical simulation, the formula proposed in this paper is approved to be of a relatively small error and a high accuracy, which can be applied to various calculations of forward extrusion model.
Mechanical Products’ Function and Structure Modeling Based on the Knowledge
Authors: Xin Zhi Jie , Zhang Ying Yu
Published: September 2011

The method and the technology of Mechanical products’ function and structure modeling based on the knowledge are discussed in this document. The method of description and index of product design knowledge is analyzed. In the foundation, the functional analysis and the function solution to the product functional model are offered. The expression and the retrieval method of the product structure modeling are proposed. Finally, the application of the method is put forward taking the CNC arc tooth milling gear machine structure design as the example.
Study on Thermal Analysis of Main Mirror in Space Solar Telescope
Authors: Li Rong , Shi Hu Li , Chen Zhi Ping
Published: September 2011

The proposed Chinese Space Solar Telescope (SST) is the first large aperture space telescope in China designed to observe the sun. With an effective aperture of Φ1m, the primary mirror faces the sun directly, which receives more than 1000W heat that will lead to unacceptable thermal distortion in such severe thermal condition. Therefore, the temperature field of SST, which is changing with its orbital position, is critical in its design. In this paper, an analysis of the thermal flux in the SST is presented firstly. Further more, the heat flux of orbit is calculated with the thermal softerware NEVADA (Net Energy Verification And Determination Analyzer) according to the orbit parameters of SST. The thermal design software SINDA/G (System Improved Numerical Differencing Analyzer/Gaski), the radiation analysis software NEVADA and the finite element analysis software MSC.Patran are used to simulate the temperature field of the SST. In the end, the temperature distribution of the primary mirror is calculated. The temperature level of the primary mirror indicates that the system can achieve high spatial resolution with 0.1″~0.15″. It also means that the thermal control design is effective. The optical requirements to the SST thermal control are met. The thoughts and methods of the thermal analysis are also useful for similar optical telescopes designed for solar observation.
The Dynamic Simulation of Vibration Process of the Top Drive System of the JDD-100 Type Drilling Rig Based on ADAMS
Authors: Yu Ping , Xiao Zhi Hui , Wang Yao Hua , Liu Dong Yu
Published: September 2011

We studied the high frequency vibrator of the top drive system based on ADAMS. A parameterized simulation model of the axial rotation of gears and eccentric block is established, and dynamic change of the impact and the actual movement of the rotating components of the top drive system are analyzed. Then create a virtual prototype on the basis of that. It can obtain curves that some parameters change relative to time, such as the exciting force and the centroid position of eccentric block. Thus it achieves dynamic simulation analysis of virtual prototype of the top drive system.
Discussion of Design Ideas in Product Development Design Based on Product Extension in Marketing
Authors: Long Sheng Jie , Huang Shi Hong
Published: September 2011

Users consume products all the time, while companies produce products all the time. Product is the fundamental where enterprises have their foothold and product development is the only way to business survival and development. To conduct effective product development, enterprises must have scientific marketing strategy and rational ideas of development. Therefore, to analyze the ideas in product development design from the perspective of product extension in marketing helps expand the vision in product development, define product development objectives and also helps to find the accurate positioning of product design.
The Effect of Normal Curvature of the Free Surface on the Cutting Width
Authors: Wang Ming Hai , Li Xiao Peng , Sun Lei , Sun Yue
Published: September 2011

This paper analyzes the influence of processing surface curvature of the free surface to the cutting width to improve the cutting width of free surface. The results show that this analysis is feasible to improve the process if the machining accuracy allows. It shows that the curvature of the machined surface and the curvature of the cutting tools have a great impact on the cutting width if they are matched reasonable. Therefore, analyzing the curvature of the surface of the surface of free-form surface machining can improve the cutting width effectively.
Forming Technology of Spiral Micro-Groove in Plane
Authors: Xiang Jian Hua , Zhang Chun Liang , Jiang Fan
Published: September 2011

A spiral micro-groove structure in plane was processed by P-E method in this paper. The shapes of groove structure was restricted by P-E depth aph and feed f. The influence aph and f on the height of fin and matching relation between aph and f were analyzed, and optimal value of aph and dph was obtained. The highest fin was achieved when dph was the optimal value in processing. Meanwhile, the effect of rotational speed n on the morphology of micro groove was studied.
Development of Structural Health Monitoring Software System of Shanghai Center Tower
Authors: Zhou Zhi Hao , Zhang Qi Lin , Yang Hui Zhu , Chen Lu
Published: September 2011

Shanghai Center Tower is the tallest skyscraper under construction in China with the height of 642 meters. In order to reflect the real structural status of Shanghai Center Tower during the construction period and running period in three dimensional graphics, a Structural Health Monitoring Software System (SHMSS) is developed. The CAE software system consists of three function modules such as Modeling module, Data Management module, Post-Processing module. The Modeling module could build a 3D model confirming to the real Shanghai Center Tower based on the Building Information Modeling (BIM) concept; the Data Management module could access the engineering data produced by the sensors; then in the Post -Processing module, various data about the Shanghai Center Tower could be processed and structural parameters such as member force, displacement, wind pressure would be displayed in the 3D model.
Design and Magnetic Circuit Analysis on Claw-Pole Permanent Magnet Generator for Vehicle Application
Authors: Ma Jian Wei , Yin Wan Jian , Yu Wan Hai , Ji Qing Shan
Published: September 2011

The rotor of claw-pole permanent magnet generator is constructed by two flangeHs with claw and a ringH of Nd-Fe-B permanent magnet magnetized axially,H axial fluxH is transformedH effectiveH radial fluxH, the polarityH of adjacent claw-poles is opposite, N poles and S poles array alternately. Based on design theory of permanent magnet generator, major parametersH of generator is determineHd. Using equivalent magnetic circuit method, the magnetic path of generator is analyzed, permeance and flux are calculated, thus the claw-pole permanent magnet generator is designed, it possesses high reliability, simple processH and effective voltage-stabilized characteristic.
Solid Modeling of Spatial Cam with Oscillation Roller Follower
Authors: Ren Ai Hua , Sun Guo Xing , Sun Chuan Qiong
Published: September 2011

Though spatial cam has been widely used in various fields of machinery and equipment ,but it is seldom used in continuously variable transmission situation. So firstly the working principle of spatial cam for CVT is introduced, and then equations of the pitch curve and cam contour are derived .In order to get the required dimensions and parameters of spatial cam during three dimensional modeling, program is developed with programming software Mathcad and the corresponding programming flow chart is listed out. And the running results of the Mathcad program and features of spatial cam in Pro/E are correlated to realize solid modeling, at last an example is given to demonstrate the feasibility and flexiblity of this method.
Design and Realization of a Flexible Claw of Rough Wall Climbing Robot
Authors: Chen Dong Liang , Zhang Qun , Liu Shao Zhi
Published: September 2011

Based on the research of foot characteristics of insecta, a climbing robot’s mechanical structure and kinematics are analyzed, and the main crawling institutions was designed by a kind of bionic four-bar linkage. Claws are made of sharp spines, claws are composed of a number of toes which are flexible structure with local degrees of freedom, they have a grate adaptivity to the rough wall. We have studied the characteristics of the rough wall climbing, and made analysis affection of reliability with the angle perched on. The experimental study indicates spine planning and structure design, material selection are reasonable.
Virtual Prototype Co-Simulation of 4WS Vehicle
Authors: Wang Wei Wei , Xu Jian Feng
Published: September 2011

A new 4WS vehicle model is set up by means of revamping a foreign FWS model. Co-simulation is completed by loading 4WS mechanical model as a subsystem which is built to express the characteristics of physical model of vehicle in ADAMS/Car into the control system modeled in MATLAB. Moreover, the response curves of evaluating handling stability are obtained according to co-simulation results of step steering maneuvers and single lane change maneuvers. It provides theoretical basis for developing 4WS physical vehicle rapidly.
Geometrical Models for Precision Grinding Aspherical Mould
Authors: Han Cheng Shun , Zhang Qiang , Huang Zheng , Sun Tao
Published: September 2011

Aspheric optical components are widely used as important parts of commercial optical products owing to their desirable properties. The fast growing demand needs urgently efficient and economical fabrication methods. So this paper discussed systematic geometrical models for programming tool path of precision grinding aspheric mould used in batch production. The integrated geometric models and the corresponding machining parameters, such as suitable radius of tools, tool path interval and linear feed were presented based on precision assurance for lower manufacturing cost and higher production. Therefore, it could also provide a reference for NC control software system in other kinds of aspheric surfaces manufacture.
Prediction of Microstructure and Mechanical Properties of Plate in Roller Quenching
Authors: Wang Chao , Li Jia Dong , Yuan Guo , Wang Zhao Dong , Wang Guo Dong
Published: September 2011

Finite difference equations are used for simulation of plate temperature field in roller quenching, and cooling rate in thickness direction is calculated in this paper. Based on improved Maynier model of steel chemical composition and cooling rate, the microstructure constituents and hardness of 30mm thickness pressure vessel steel 07MnNiMoVDR are predicted and calculated with interpolation method. The experimental verification indicates that the simulation results agree well with the experimental ones.
Experimental Study on Cryogenic Cutting of High-Strength Steel with Liquid Nitrogen Cooling
Authors: Li Shu Juan , Hu Yong Ke , Jiang Xue , Du Juan
Published: September 2011

As a modern manufacturing technology, cryogenic cutting technology is one of effective ways to improve machining efficiency of hard-cutting materials.With typical hard-cutting materials 35CrMnSiA and 45CrNiMoV high-strength steel as the research object, the comparison experiment between cryogenic cutting and dry cutting of two kinds of high-strength steels was made in this paper. In the changing cutting speed conditions, the cutting force and the surface roughness of two kinds of cutting were measured in this experiment.By changing the length of cutting stroke, the cutter wear of two kinds of cutting was measured, and a comparison of chip-breaking effects was made in the experiment.The experimental results indicate that the cutting force, surface roughness, and tool wear in cutting 35CrMnSiA and 45CrNiMoV high-strength steel under cryogenic condition are reduced, and chip-breaking effect of cryogenic cutting is improved. This may be attributed mainly to improve the machinability of higth-strength steel.
A Study on the Characteristics of Micro Electropolishing for Stainless Steel
Authors: Kim Sung Hyun , Lee Sang Gyun , Choi Seung Geon , Lee Eun Sang , Choi Seung Bok , Lee Chul Hee
Published: September 2011

Electropolishing, the anodic dissolution process without contact with tools, is a surface Treatment method to make a surface planarization using an electrochemical reaction with low current density. Stainless steel can be put various applications which require purity and high precision surface of products. The aim of this study is to investigate the characteristic of electropolishing effect for stainless steel workpieces. In order to analyze the characteristics of electropolishing effect, surface roughness and micro-burr size were measured in terms of machining conditions such as current density, machining time and electrode gap. The tendencies about improvement of surface roughness by electropolishing for stainless steel workpieces were determined.
Experimental Research on the Dynamic Characteristics of the Milling Vibration in High-Speed Milling of the Thin-Wall Components
Authors: Li Liang , Liu De Fang
Published: September 2011

Thin-wall components were widely used in aerospace products. However, due to the special shape of the structure and the poor machinability, traditional technologies were hard to mill the thin-wall components, milling vibration influenced in the machining process. In this paper, analytical and experimental identifications of the chatter frequencies in milling processes were presented. In the case of milling, there are several frequency sets arising from the vibration signals, as opposed to the single well-defined chatter frequency of the unstable turning process. Frequency diagrams are constructed analytically and attached to the stability charts of mechanical models of high-speed milling. We proposed the corresponding technological measures to prevent deformation.
Analysis on Fiber Laser Welding of MS1470 Steel
Authors: Li Ya Jie , Xin Li Jun , Wang Zhi Yong
Published: September 2011

MS1470 steel is mainly used in the automotive industry, which has high strength, light weight and low cost. However, there always appear grains coarsening, brittle increasing, lower intensity and other issues. To solve this problem, we have analyzed the welding process, the fracture morphology and microstructure etc. The results shown that the microstructure were mainly ferrites and lath martensites. However, grains coarsening in the HAZ were serious, and fracture failure also occurred in the heat affected zone. Meanwhile, MS1470 steel had formed a small amount of pores during rolling process, which also is an important reason for cracks formation.
Parametric Study of Welding Temperature Distribution in T-Joint Fillet Weld Using FEM
Authors: Asifa Khurram , Li Hong , Li Li , Khurram Shehzad
Published: September 2011

This paper presents FE simulation of Arc welding process using nonlinear transient thermal analysis to study the effect of process parameters on temperature distributions in T-joint fillet welds. An APDL (ANSYS Parametric Design Language) program is developed to define moving surface heat source model with Gaussian distribution into simulations by using commercially available FE code ANSYS. The transient temperature distribution in fillet weld during welding process are predicted and subsequently validated with published experimental results. Influence of heat energy input, electrode angle, welding speed and plate thickness on temperature distribution was further explored. The present work provides a basis for prediction of welding residual stresses and distortions in fillet joints.
Formation of Side Electrode on Quartz MEMS-Based Double-Ended Tuning Fork Using Enhanced Lift-Off Process
Authors: Liang Jin Xing , Li Xue Feng , Ni Yun Fang , Li Hong Sheng , Huang Li Bin , Li Kun Yu
Published: September 2011

This paper presents an enhanced lift-off process for forming side electrode on the quartz –based double-ended tuning fork (DETF) resonator. In the case of fabricating quartz-based DETF, electrode pattern design is an important issue. Taking advantage of the piezoelectricity effect, a simple surface electrode can excite the flexural motion of the DETF, however it suffers from the large motional resistance. Proposed lift-off process can pattern excitation electrode on the side wall without using special photolithograph equipments. Experimental results demonstrated that the motional resistance can be reduced by several times by forming side electrode using proposed process.
Analysis of Cutting Forces and Machining Error in Ball End Milling of Cylindrical Surfaces
Authors: Ouyang Ba Sheng , Lin Guo Xiang , Tang Yong Hui
Published: September 2011

Cutting forces and machining error in contouring of concave and convex surfaces using helical ball end mills are theoretically investigated. The cutting forces are evaluated based on the theory of oblique cutting. The machining errors resulting from the tool deflections due to these forces are evaluated at various points of the machined surface. The influence of various cutting conditions and cutting modes on machining error is investigated and discussed.
Study on Influences of Superplasticizer with Waste Plexiglas (WPS) on Cement Paste and Mortar
Authors: Zheng Gang , Wang Ru Min , Zhao Gao Yang , Yu Xiao Jiao
Published: September 2011

In this paper, superplasticizer was synthesized from waste plexiglas and sodium allysulfonate (WPS). Poly(methyl methacrylate-co-ethyl acrylate) grafling sodium allysulfonate (PMMA-g-AS) was prepared through reactive extrusion in self-single screw extruder and hydrolysis reaction. The structures of the WPS were characterized by FT-IR spectrometer. The results show that structures of the WPS are clear. Properties of WPS and traditional naphthalene sulfonated formaldehyde condensates (FDN) were investigated, when water-cement ratio (W/C = 0.29) and the dosage of superplasticizer is 0.6 wt.% of cement, water reducing rate of mortar is 22.1%, which is 7.3% higher than that of FDN. BWP of the mortar of WPS is 1.4%. In addition, the compressive strengths of mortar of 3 d, 7 d and 28 d are higher than that of FDN, respectively, indicating that over-all performance of WPS reaches the standard of superplasticizer and its ratio of performance to cost is higher than FDN.
Present Status of Fault Injection Research for Testability Demonstration and Evaluation
Authors: Zhao Jian Yang , Li Xiao Min , He Yang
Published: September 2011

This paper analyses the exiting fault injection technology completely which is a key role in the testability demonstration and evaluation test, lists the problems it faces and proposes a synthetical fault injection system platform to solve the problems. Finally, a fault injection test is done on the secondary electrical power source system of a missile’s fly control module and the test result shows that the platform is much more convenient, efficient and practical in project.
The Research Based on the Movement Control CARDS of NC Machining
Authors: Li Lian Bo
Published: September 2011

The paper’s the main research object is the multi-axis servo motor’s sports control using the movement CARDS. It researches and designs the four shafts servo motor control system by using the comprehensive application of movement control CARDS, motor drive, DLL function library and VB high-level language of software and hardware platform. The control system finishes NC machining of the function, using VB program called the function in the movement control CARDS function library.
Research on Structure Analysis of a Feeder Based on ANSYS
Authors: Zhang Yan Yan , Zhu Ming Ming
Published: September 2011

Based on the large analysis software ANSYS, the FEA model of feeder was be setted up, the mechanical properties of the material was considered ,and the stress and deformation under loaded of two type materials HDPE and LDPE were be Comparative analysied, Results show that: the funnel’s stress smaller,the maximum stress only 2-3Mpa and no more than 7-31Mpa of two materials’ tensile strength.The funnel’s deformation in allowing strain range about 2-3 mm, so structure is safe.In addition,the feeder legs bearred bigger force about 60Mpa, because the material was used Q345 steel, so the strength was enough and HDPE material feeder have leeway of reduced materials.
Based on Bearing Centerless Strengthening and Polishing Processing Multiple Collision Finite Element Simulation Analysis
Authors: Ou Ya Fei , Liu Xiao Chu , Liu Chuan Jian , Li Wen Xiong , Wang Hao
Published: September 2011

To further understand the bearing performance’s influence of the plastic deformation after balls and bearing rings surface multiple collision in ball bearing’s strengthening and polishing processing by the strengthening and polishing machine. ABAQUES software is used for finite element analysis in the three-dimensional modeling of multiple collision, and the plastic strengthen the performance of bearings is researched mainly. The results shows that the raceway surface is significant plastic strengthen in multiple collisions, Yield ability is enhanced largely, and surface residual stress state present for the compressive stress. Raceway surface strengthening process requires a particular number of times to ensure the processing, with strengthening processing times increasing, bearing raceway surface strength is saturated, then, the number continued to increase to strengthen, the surface strength is no significant increase. But after the collision of ball, uniform residual compressive stress is forming in the bearing surface, good for improving the fatigue strength and bearing life.
Rare Earth Superfine Powders Fabrication and Characterization by Novel Non-Ball Miller
Authors: Li Kun Shan , Mo Yi Min
Published: September 2011

The non-ball mill is a new-type grinding equipment that is developed on the foundation of the successful technology of vertical shaft breaker, vertical mill, roller etc., its principle is to make the movement route of attacking the supply in the machine to be redesigned , the grain reaches to break once only through constantly accumulating energy in the grain, the crushing ratio is big, especially this machine adopt the advanced technology, the vulnerable part is made of metal and nonmetal, which make the life-span lengthens ten times than the alloy hammer’s, which is invention in the world . The average size of this machine is smaller than 1 mm, it is not only suitable for soft quality supplies but also further more superior for hard quality supplies performance.
Optimal Design Grape Rain Shed Based on CFD and GSCAD
Authors: Wang Jian , Yang Hong Bing
Published: September 2011

Plated PE plastic steel pipe has characteristics of high strength, light weight and strong resistance of corrosion and it is very suitable for construction of grape rain shed. The wind pressure distribution of multi-span grape rain shed frame is simulated by CFD software, and the structure of multi-span grape rain shed is optimized in this paper. The force structure of pre-optimal and post-optimal multi-span grape rain shed is analyzed by GSCAD. The study shows that the plated PE plastic steel pipe is suitable for grape rain shed, and the post-optimal multi-span grape has good performance.
The Design of New Water Jet Spray Gun
Authors: Zhao Xue Wei , Zhang Xi Zheng , Zhao Xin Hua
Published: September 2011

The structure design of gun according to the flow velocity and flow energy loss of the fluid in water cutting gun jet channel. Take the gun body plus filter method to solve when the water knife nozzle is small that easy jams. Adopt replaceable type jet tube solve appear jams when cannot promptly eliminate malfunction. Use adjustable grip handle solve the different length require in different surgery. Adopt casing tube wall approach to solving the negative pressure attract residual tissues and cells is not easy cleared.
Function Simulation of the TBM Based on VRML
Authors: Wang Zhao Qian , Yu Tian Biao , Wang Chang Xin , Zou Ye , Zhao Hai Feng , Wang Wan Shan
Published: September 2011

Based on the distributed virtual reality technology, combining the interactivity of language VRML and network’s superiority of Java/JavaScript, this paper developed a function simulation system of the TBM, which avoids the single product launch of the network forms as well as the expensiveness shortcomings of augmented reality simulation systems. This system can simulate the movement of TBM presentations, virtual assembly and mining process, fully utilizes the advantages of VRML. The customers can get a full, screen real and powerful understanding of product performance using this system for simulating a three-dimensional movement and excavation process of the TBM, such as on the real environment. This system simulation method does not rely on the expensive virtual reality simulation platforms, but it has a facilitating transmission speed for a small size of system files, which is characterized by free installation, interactivity, authenticity and low cost.