bluuebunny/crossref_metadata_2025 huggingface dataset:
Research of Simulation Technology on Antiaircraft Artillery Shooting Amending under Virtual Battlefield Environment
Authors: Ma Zhi Qiang , Cheng Yuan Zeng , Sun Shi Yu , Wang Chun Ping
Published: November 2010

The paper described how to use the OpenGL 3D graphics library achieving the simulation of the virtual battlefield environment under the C++Builder software development environment, and how to achieve the simulation of antiaircraft artillery shooting amending process in the virtual battlefield environment. About creating the virtual battlefield environment, the paper elaborated 3DS model’s transfer method and display method, virtual scene mapping and romancing method and coordinates transformation method under the virtual environment. About simulation of antiaircraft artillery shooting amending, this paper described the design ideas and implementation process of shooting amending simulation, especially researched the method of building target flight route mode based on actual conditions, introduced the shooting error’s simulation realization, explicated the calculation process including the projectile flight time, target’s ahead point coordinates and miss distance, and finally studied that how to use the miss distance to amend the firing data. The experiments prove that the simulation of shooting amending is correct and feasible. The simulation provides a basis for shooting amending.
Research and Implementation of Rapid Displaying ECDIS Based on Large Scale S-57 Data
Authors: Sun Xing Yi , Shen Yan Chun , Ma Jian
Published: November 2010

In the process of researching and implementing electronic chart display and information system, discovered the problem of displaying efficiency based on large scale electronic chart data. As the electronic chart data and its objects have scale range, suggested dividing electronic chart data into several grades and controlling displaying by scale. When displaying electronic chart data, the data within current scale range can only be used. The experimental results demonstrate that the algorithm is efficient in displaying the huge electronic chart data.
Research on Control Strategies and Optimal Signal Timing for Traffic Congestion Based on Prediction
Authors: Li Shu Bin , Lin Yong , Ren Hua Ling , Long Jian Cheng
Published: November 2010

Designing effective control strategies to traffic jams is an important measure to solve the problem of traffic jams in urban traffic network. Most of the green ratio models clear off crowded traffic flow synchronously at each approach of signal intersection in oversaturated traffic, but ignore the difference of traffic flows in different traffic state, and lead to the queue becoming longer and longer at oversaturated signal intersection. In this paper, the cell transmission model is applied to the propagation of traffic jams, the formation and dissipation of traffic jams in urban traffic network. A new method for predicting the traffic states is proposed, and the future traffic states can be achieved, according to the spatial structure of traffic jam propagation. We use an idea of traffic priority as an management measure to design the optimal green ratio in advance, and the improved green ratio model can realize the goal of preventing traffic congestion and clearing off traffic blockage quickly. Simulation results show that the proposed strategies with appropriate application can effectively control jam dissipation and prevent traffic congestion formation.
Aspect Mining Based on Object-Oriented Systems’ Dynamic Behavior Models
Authors: Chu Hua , Li Qing Shan , Hu Shen Ming , Chen Ping
Published: November 2010

Aspect mining is a reverse engineering process that aims at finding crosscutting concerns in existing systems. This paper describes an aspect mining approach making use of the results of reverse engineering, statechart diagram, to aid in the understanding of an object-oriented software system’s behaviors. An aspect based on the recovered statechart diagram is defined as a set of states and an event. These states will transit to the same state after they send the event. Finally, systematic experiment is conducted in the paper in order to verify the correctness and validity of this approach.
Acoustic Signals Analysis Based on Empirical Mode Decomposition and Spectrum Analysis Technique
Authors: Zhang Yan Li
Published: November 2010

A method to analyze the acoustic signals collected in fully-mechanized caving face is presented in this paper. Through analyzing the marginal spectrum and frequency spectrum of intrinsic mode functions obtained by empirical mode decomposition, acoustic signals’ frequency and amplitude characteristics are gotten, that is, high frequency signals about 1000Hz ~2800Hz are produced when the top coal is combined with gangue. Furthermore, the acoustic signals’ instantaneous energy spectrums in the frequency range of 1000Hz ~2800Hz can be used to identify the coal-rock interface.
Numerical Algorithms for Solving Restricted Three Body Problem
Authors: Zhang Yun Yan , Li Yan Jun , Li Nan
Published: November 2010

A precise integration algorithm for solving the restricted three body problem was put forward based on precise integration method, which divided a large integration time into small intervals and only small value matrix participates in the iterative process during the computation of the exponent matrix. And another symplectic algorithm for solving non-separable Hamiltonian system constructed by flow complex was also introduced, which only had periodic variational energy. The results of both algorithms were compared with fourth Runge-Kutta algorithm and their performances and advantages were analyzed, showing the validities of these two algorithms.
Towards a Component-Based Requirements Modeling for Automotive Systems
Authors: Yan Xu Qin , Liu Xiao Jian , Wang Zhi Xue , Che Xiao Bo , Mao Cheng Yong , Li Yang , Cheng Wei
Published: November 2010

Requirements modeling is a critical stage in the development of ECUs (Electronic Control Unit) of automotive systems. A typical automotive system usually involves large amount of requirement items, and possesses restricted timing constraints and complicated interactions, therefore a single modeling language only does not cover the whole characteristics of a system. In this paper, we extend SaveCCM, a component model for automotive software development, with timed automata to form a modeling framework for automotive requirements. The integrated model can be used to analyze the architecture and timed behavior of an automotive system. The proposed approach takes the following advantages that: (1) It can effectively and completely express the architecture and behavior requirements of automotive systems; (2) It can describe the interactions between an ECU and its environment in terms of synchronization channels.
The Design of Recirculating Aquaculture Temperature Control System Based on PLC
Authors: Wu Yan Xiang , Hu Yong Mei , Liu Yu Qing , Xue Min Jie
Published: November 2010

In order to improve the aquaculture monitoring system in China, this paper designs a system adopting the SIMATIC S7-200 CPU226 and PID control algorithm to make real-time monitoring and controlling for the water level and temperature of closed circulating aquaculture system, thus it can realize constant control of water level and temperature in the culture pond. The overall control scheme and principle of the system are introduced in detail, followed by the structure design of the system software and hardware. The designed system can efficiently achieve system logic control, safety control, fault display and fault treatment.
High-Tech Spin-Offs’ Operational Risk Assessment System
Authors: Ma Li , Li Li Hua
Published: November 2010

This paper analyzes the sources of high-tech spin-offs’ operational risks, establishes a multifactor hierarchical index system and applies Analytical Hierarchy Process and fuzzy mathematical methods to build a fuzzy overall evaluation model. This research can provide a useful tool to help high-tech spin-offs scientifically assess their operational risk degree in order to formulate corresponding countermeasures to evade the risks, and realize sustainable growth.
Analysis of Laser Disturbance to Anti-Ship Missile IR Detector
Authors: Liu Yan Wu
Published: November 2010

Aiming at laser disturbance to IR homing anti-ship missile, laser disturbance to IR detector was researched. First, link model on laser disturbance to anti-ship missile IR detector was set up. Then laser atmospheric transmittance on the sea was deduced. 1.06μm laser atmospheric transmittance on the sea was calculated. The relationship was obtained among atmospheric transmittance and visibility and elevation. And then 10.6μm laser atmospheric transmittance curve was described. The curve is changed by visibility and propagation distance. Finally, 1.06μm laser was given as an example, the necessary laser energy which can disturb effectively anti-ship missile IR detector was calculated.
Performance Analysis of a Robust Wavelet Threshold for Heavy-Tailed Noises
Authors: Wei Guang Fen , Su Feng , Jian Tao
Published: November 2010

The interesting signal is often contaminated by heavy-tailed noise that has more outliers than Gaussian noise. A robust wavelet threshold based on the minimax description length principle is derived in the ε-contaminated normal family for maximizing the entropy. Compared with classical threshold based on Gaussian assumption, the robust threshold can eliminate the heavy-tailed noise better, even if the precise value of ε is unknown, which shows its robustness. The further experiment shows that soft threshold is more suitable than hard threshold for robust wavelet threshold technique.
Application of Hilbert-Huang Transform to Vibration Signal Analysis of Coal and Gangue
Authors: Liu Wei
Published: November 2010

In this paper, a new method of vibration signal analysis of coal and gangue based on Hilbert-Huang transform is presented. Empirical mode decomposition algorithm was used to decompose the original vibration signal of coal and gangue into the intrinsic modes for further extract useful information contained in response signals under complicated environment. By analyzing local Hilbert marginal spectrum and local energy spectrum of the first four intrinsic mode function components, we found the difference of coal and rock in specific frequency interval that the amplitude and energy mainly distributed at frequency interval between 100Hz and 600Hz when coal was drawn, while the amplitude and energy were more concentrated at 1000Hz or so when gangue was drawn. Furthermore, the further analysis result from marginal spectrum of each intrinsic mode function component agreed well with the conclusion above. So the extracted features with the propose approach can be served as coal and gangue interface recognition.
Tribological Behaviors of Chromium Steels Sliding against Brass in Different Gases
Authors: Qiu Ming , Yan Jia Fei , Li Ying Chun
Published: November 2010

Oxygen content in a working environment affects tribological characteristics of steels. Tribological behaviors of chromium steel pins sliding against brass discs were investigated using a pin-on-disc tribometer in various environments (100%O2, 75%O2+25%N2, 50%O2+50%N2, 25%O2+75%N2 and 100%N2). The tests had performed at sliding speeds of 1 and 4 m/s and at contact pressure of 0.33 MPa. The worn surfaces and wear mechanism were analyzed by SEM, EDS and XPS. The results indicate that the wear loss of the steel pin is the lowest in 100%O2 atmosphere and highest in 100%N2 atmosphere. However, the rules of the friction coefficient and the wear are the same with the N2 content increasing in the mixed O2/N2. Furthermore, the micrographics analysis proves that the friction coefficient and the wear are strongly influenced by the surface films which depend on the tribochemistry reaction in ambient atmospheres, the adhesion between steel and brass surfaces and the mechanical properties of surface film.
Research on Stress Method of Vehicle Suspension Springs and Finite Element Modeling
Authors: Shi Xiao Hui , Xu Ming Heng , Gao Hong Li
Published: November 2010

This paper combine the traditional mechanical analysis with shearing stress analysis of GB springs, and presents a new stress method, It also points out that different types of suspension springs are suitable for stress method. Secondly, by the analysis of Solidworks Simulation of F1-XXX spring, the new shearing stress algorithm and security allowable stress are consistent with the CAE analysis results.
3-D Optimization of Self-Balanced Torsion Bar Diameter and its Fillet Radius by FEM
Authors: Wu Lin Feng , Yin Xiao Chun , Liu Zhong Hua
Published: November 2010

The torsion bar system model of a 150-ton convertor tilting mechanism was made by using APDL language of the finite element software ANSYS.And the diameter of the torsion bar and the fillet radius were optimized based on the above analysis by using optimal module.A new 150-ton convertor was developed by the optimal results and has been in good performance since 2006.The results show that the optimal structure of torsion bar was more economic and reasonable than the traditional structure.Optimization scheme can all be given access to safe,economical and reliable design results and ensure the converter performance.Moreover, this method provides three-dimensional, multi-touch, irregular structure with a valuable experience and a new idea and can be extended to the design of heavy products.
Test Investigation on Autonomous Scooping Control Strategy of Wheel Loader
Authors: Zhang Hai , Cao Shu Juan , Kazuhiko Sato
Published: November 2010

The scooping process of wheel loader is divided into three phases, called insertion, scoop-up and pull-out phase respectively. The key phase in scooping process is scoop-up phase, so the test investigation is focused on it, and the concept of resistance isoline was verified.
Dynamic Optimization of the Spindle-Cutter Coupling System
Authors: Gao Xiang Sheng , Zhang Yi Du , Wu Qiong
Published: November 2010

A dynamic model of the spindle-cutter coupling system is established including the gyroscopic effects and shear deformation. Dynamic characteristic of the system is analyzed by utilizing the whole transfer matrix method (WTMM) based on the Riccati transformation, and strain energy distribution of the system is estimated. Dynamic characteristic of the system is optimized by univariate search technique. And optimal path in the system optimization is provided. According to the optimal path, a method of local mode elimination by decreasing stickout length of the milling cutter is proposed. The calculation results indicate that preload level of front bearing and rear bearing is the key factor of dynamic optimization after local mode elimination.
Filtration and Pulse Cleaning System for Particle Removal from Gas
Authors: Li Hai Xia , Sun Zhi Jun , Zhao Li Jun , Tie Zhan Xu
Published: November 2010

The application of rigid ceramic filter for gas filtration on an industrial scale has shown unstable operation over periods of days. The behavior of the ceramic filtration in further application can be predict by measuring properties of a variety of dust and filtration operation condition. The aim of the experimental investigation is to analysis the pressure distribution inside and outside the ceramic filter along the filter length, and to analyze the pressure drop across the filter along the filter length. Ceramic filter filtration system composes multi-pipe filters for gas clean up is introduced. The operation parameters can be measured by this test system, such as the pressure in the filter cavity and outside the filter surface, velocity outside the filter, gas temperature and humidity, flow rate, dust particle size concentration before gad entering the filter tank and after the gas leaving the filer tank, the pulse cleaning pressure.
Establishment of CSCD in PTC Environment
Authors: Li Yan Feng , Mou Hong Hong , Yu Jian Gong
Published: November 2010

Computer Supported Collaborative Design(CSCD) is the applicarion of Computer Supported Collaborative Work(CSCW) in the product design field. Based on the analyse of the key technologies and problems of CSCD, a CSCD design frame faced to product design is established. Then a CSCD system faced to radar key components is founded with Pro/INTRALINK software and re-exploiting technology. Some key processes are designed too, such as database management, workflow programming, information communication, file release, conflict identification and safety management. These will provide a reference for constructing a cooperative design environment.
Study on RSM Procedure of Straightening Process for Aeronautical Component Based on Finite Element Simulation
Authors: Zhang Hong Wei , Zhang Yi Du
Published: November 2010

Straightening of machining deformation of the aeronautical monolithic components is one of the most complex manufacturing problems encountered in modern aerospace industry. In this paper deformation straightening processes are simulated using finite element method and the integrated simulation environment is put forward. A new method combining response surface method (RSM) with finite element simulation is proposed in order to quickly predict the straightening results in certain design space. The response surface about springback was constructed based on simulation results.
Digitalization and Meshing Performance Analysis on Tooth Surfaces of Hypoid Gear
Authors: Nie Li Xin , Zhang Li Mei
Published: November 2010

Digitized hypoid gear’s surface model, which is constructed by NURBS method, can set free the constraints of conventional processing technique in the process of designing and manufacturing hypoid gear. The digitalization of tooth surfaces of hypoid gears consists of three parts: building large gear’s NURBS model, calculating small tooth surface’s character parameters based on actual requirements and small tooth surface’s digitalization. The digitalization of tooth surfaces can be realized by machining simulation, and the key points are how to establish equations of cutter head and grids of gear solid, and how to judge correct trace points in the process of machining simulation. With the aid of digitized model of hypoid gear, tooth contact analysis can be accomplished by regular motion of two NURBS tooth surfaces.
Cutting Force Model of Aluminum Alloy 2014 in Turning with ANOVA Analysis
Authors: Ma Yong Jie , Zhang Yi Du , Zhao Xiao Ci
Published: November 2010

In the present study, aluminum alloy 2014 was selected as workpiece material, cutting forces were measured under turning conditions. Cutting parameters, the depth of cut, feed rate, the cutting speed, were considered to arrange the test research. Mathematical model of turning force was solved through response surface methodology (RSM). The fitting of response surface model for the data was studied by analysis of variance (ANOVA). The quadratic model of RSM associated with response optimization technique and composite desirability was used to find optimum values of machining parameters with respect to cutting force values. The turning force coefficients in the model were calibrated with the test results, and the suggested models of cutting forces adequately map within the limits of the cutting parameters considered. Experimental results suggested that the most cutting force among three cutting forces was main cutting force. Main influencing factor on cutting forces was obtained through cutting force models and correlation analysis. Cutting force has a significant influence on the part quality. Based on the cutting force model, a few case studies could be presented to investigate the precision machining of aluminum alloy 2014 thin walled parts.
SPC-Based Real-Time Control Method for CNC Machining Quality
Authors: Kang Xin Long , Yu Dong Man , Yang Xue Ling , Wang Di
Published: November 2010

This paper presents the methods and applications for the real-time control of CNC machining process quality in detail and clarifies the objectives of SPC for CNC machining, in order to enhance the understanding of the factors that cause instability to process system. Also, this paper adopts the methods and procedures for SPC to effectively serve the production of high-precision products for enterprises, in order to meet customers’ requirements and expectations.
Design and Test of the Plate Type Plug Seeder Based on Magnetic Attraction
Authors: He Yu Jing , Liu Bao , Wang Wan Zhang
Published: November 2010

Focusing on the existing problems of precision seeder the plate type plug seeder based on magnetic attraction was designed. The seeder can complete the process of attracting seeds and planting using magnetic attracting principle. Through prototype test of tobacco seeds the following conclusions can be obtained: in the attracting position the single seed rate comes up to 90% and in the seeding position the planting rate is 100%.This design combines seed pelletization technology and mechanization sowing technique. It can work entirely by manual operation. It has higher planting precision and good adaptability of the seeds. So it is suitable for large-scale factory breeding.
Research on Characteristics of Damping Force of Hydro-Pneumatic Suspension
Authors: Lü Bao Zhan , Hu Ai Jun , Zhu Si Hong
Published: November 2010

Based on the analysis of vibration characteristics of certain off –road vehicle, and research of effect of front axle suspension to vehicle and parameter matching, a new type of damping-adjustable hydro-pneumatic suspension was put forward. After the analysis of its working principle, the nonlinear dynamic mathematical models of this suspension were set up. Using the method of theoretical calculation and simulation by MATLAB/Simulink, the characteristics of damping force of this damping-adjustable hydro-pneumatic suspension were studied.
Control System Design Based on CANopen Network for Multi-Legged Robot with Hand-Fused Foot
Authors: Zhang Yu Xiao , Zeng Xian Qun , Wang Xin Jie
Published: November 2010

In this paper, a distributed motion control system is designed and achieved for the modular multi-legged robot with hand-fused foot based on CANopen network. A communication network is built among modules and joints through CANopen network. Controllers and encoders are used to achieve closed-loop control for each joint. The system has completed real-time multi-jointed linkage. Moreover, experimental results have proved the reliability and validity of this control system.
Experimental Study on Two-Stage Cascade Low Temperature Pre-Cooling Equipment
Authors: Liu Xiu Fang , Wang Fa Hui , Meng Fan Mao
Published: November 2010

A two-stage cascade pre-cooling test bed was designed and set up to develop a -30°C /-60°C pre-cooling equipment. An internal heater exchanger and a condenser were set in low-temperature cycle. Theoretically the two stages can work stably at setting temperature and the low-temperature cycle can operate independently with aided starting of the high-temperature cycle. The experimental results indicate that the test bed can provide cooling capacity steadily at -46°C and -100°C respectively and the low-temperature cycle cannot operate alone for compressor overload protection. Based on the analysis, the possible reasons and detailed suggestions were put forward.
Two Hourglass Control Methods for Dynamic Analysis in Cold Ring Rolling Process
Authors: Tan Qun Yan , Zhao Xin , Zhang Xue Bin
Published: November 2010

The two methods of artificial damping and artificial stiffness are developed in dynamic explicit FEA code for ring rolling. Advantages and disadvantages of artificial damping method and artificial stiffness method are analyzed. A rectangular section cold ring rolling is simulated. The hourglass energy and the ratio of the hourglass energy to the internal energy are compared between the two hourglass control methods. The hourglass control coefficient criterion of the two methods in the cold ring rolling simulation is proposed.
Study on Reliability Tests to a Few Samples of Mechanical System
Authors: Guo Shu Yi , Qi Yong Qi
Published: November 2010

The reliability tests play more and more important role in mechanical systems. A new method named a few samples and combined the probability and the fuzzy mathematics has been set up to explore the unknown system of a few samples with the help of the life samples of the known probabilistic distribution. The method reduced the traditional reliability test samples by some auxiliary information. It converted lots of reliability test into a few samples. This paper introduced two engineering examples to verify the method as an effective way to carry out the reliability tests. It provides the theory basis for the reliability of complicated mechanical systems. The loss caused by fatigue failure is as high as 3%~4% of Gross National Product. Fatigue fracture owned to the cycle load accounts for 95% of the total number of mechanical structure failure. Unfortunately no evidence of failure is observed when fatigue failure reaches its life. This causes human casualties and great economic loss. So the reliability research on complicated mechanical systems has to realize from reliability assessment to the active reliability design. One of the key problems of the active reliability design for complicated mechanical system is to reduce the great waste of the resources used in the probability reliability test. For example, dozens of the high precision gears made of certain material may be run out in the fatigue test which would be running day and night for several months. It has been described many methods about system reliability design in the former research [1-3]. But for many high technological products and important mechanical devices, it is impossible to get the test sample to carry out probability analysis. To exert the advantages of the active reliability design and to realize the green reliability design [4], the only way is to study small samples in the reliability tests and to develop new technique. It is named as a few samples reliability tests method of the complicated mechanical systems.
Analysis and Strategy on Gear-Shape Error
Authors: Gao Hui Qin , Wang Sheng Wen , Chen Qing Guo
Published: November 2010

Gear-shape error is the key factor to effect driving stability. A analysis on the common gear cutting error processed in hobbing is made, and then the specific reasons for gear-shape error are presented. Finally, the strategies to eliminate the gear-shape error and promote the accuracy of gear machining are gave.
Application Analysis of Vortex TubeTemperature Difference Phenomenon in High-Temperature Cyclone Separator
Authors: Sheng Wei , Liu Xiu Fang , Wang Hua , Gao Zhi Wei , Liu Ru Chao
Published: November 2010

The compressed gas for ambient temperature in vortex tube can be separated into two streams of different temperature gas, which phenomenon is unapparent for non-compressed gas. However, for non-compressed high-temperature gas, it can produce temperature difference of more than 20°C in vortex tube, which has been ignored by researchers. In this paper, basic principle of temperature difference effect in vortex tube is described firstly, and cooling effect produced by different inlet temperature in the condition of low pressure ratio is analyzed, which results that obvious cooling effect can still be produced for high temperature and low pressure ratio. Combined with factual operation conditions of cyclone separator for circulating fluidized bed (CFB) boiler, a design and renovation method of cyclone separator is proposed firstly according to temperature difference effect principle of high-temperature gas in vortex tube. According to the analysis, the separation efficiency and boiler performance will be enhanced by using temperature difference effect in vortex tube to design and reconstruct the existing cyclone separator.
The History and Prospect of ERP Application of Chinese Manufacturing Enterprises
Authors: Jiang Wu Ji , He Jia Bing , Jin Zhi Gang
Published: November 2010

Since the end of the 1970s and early 1980s, with the introduction of foreign MRPII/ERP software and the advanced business management thought Chinese manufacturing industry began the road to high-level information. After 30 years of development, Chinese manufacturing industry has experienced 20 years start-up and early stage, main features of this period were long-period implementation, expensive spending and poor flexibility, coupled with the low management level and out-dated IT technology. The probability of successful implementation of enterprise ERP is very low. Since then the stage was more than 5 years of growth, and the characteristics of this period were the domestic ERP software. With simple application, short cycle implementation and low cost, many small and medium-sized enterprises had carried on successful application. Since 2005, our country enterprise ERP application entered maturity, the main features of this period are wider range and improving success rate of ERP application. The article also pointed out the deficiencies of ERP applications in different periods, and its development prospects are ERPII
The Lateral Vibration Analysis of the Machine Drive Screw
Authors: Zhang Hui Duan
Published: November 2010

The drive screw is simplified as a rotating Tinoshenko beam under the pre-tension force. Using boundary conditions and continuity conditions, the frequency equation of the screw with the elastic supports is derived considering the effect of gyroscope, the pre-tension force, the bearing stiffness, and the contact between the worktable and the screw. The effect of the system parameters on the lateral natural frequency is studied to supply a base for designing the drive system.
Study on the Constitutive Model of the ARB Specimen and Simulation for ARB Process
Authors: Wu Zhong , Liu Li Li , Zhang Guo Zhi , Xi Jun Jie
Published: November 2010

The simulation method for ARB(accumulative roll bonding) and the constitutive model of the ARB specimen were studied. Based on the ZA(Zerilli-Armstrong) model, with MSG(mechanism-based strain gradient) theory and Hall-petch principle, considering its temperature, strain ratio and the effect of the texture variation to the mechanical property, its dynamic constitutive model was established, and verified through the experiment. Moreover, the finite element simulation method for ARB process based on the dynamic constitutive model established was proposed and verified through the experiment. The study in the paper provides analysis method and theory foundation for ARB
Experimental Study on Surface Quality of Al2O3 Engineering Ceramics in Ultrasonic Drilling and Grinding
Authors: Zhang Chang Juan , Liu Chuan Shao , Zhao Bo
Published: November 2010

Engineering ceramics have been widely used in recent years because of its excellent performances. However, the high hardness and brittleness make it very difficult to process with high efficiency and good quality, especially in precision and ultraprecision machining. Therefore, a method of ultrasonic drilling and grinding is provided to the hole machining of Al¬2O3 engineering ceramics. In the paper, with different machining parameters, the surface roughness of micro hole in ultrasonic and traditional drilling and grinding is compared and analyzed. Moreover, the surface micro profile and the wear condition of drilling-grinding tool in ultrasonic and traditional drilling and grinding are observed through SEM. Finally, it is concluded that ultrasonic drilling and grinding is a kind of high efficient processing method adapting to micro holes of hard - brittle materials etc.
Simulation on the Wear of Micro Mill Cutter in Micro Milling
Authors: Hu Hai Jun , Sun Ya Zhou , Lu Ze Sheng
Published: November 2010

In this paper, the prediction model of micro-milling cutters in milling process is established to simulate the wear depth in the software DEFORM-3D, the chips growing up an forming process. The paper studies the wear level during the cutting process of micro milling amount of feed per tooth and spindle speed. In this paper the cutting force, cutting heat flow and the contact situation between cutting tool and workpiece are considered in the simulation model. The paper uses abrasion mathematical model related to contact stress and temperature, etc. and studies the influence of the wear depth of milling cutter through the analysis of milling temperature and metal sliding characteristics. Finally, the FEA micro –soft ware is used to verify the change of amount of feed per tooth and the spindle speed with wear depth. The paper provides reasonable parameters for using the micro milling cutter better.
Pneumatic Measurement Approach for Form Tolerances of Inner Hole in Spool Valve
Authors: Liu J. , Wang Guang Lin
Published: November 2010

Pneumatic measurement and genetic algorithm based approach for form tolerances, including the cylindricity error, circularity error and straightness error of axis, of inner hole in spool valve are studied in this paper. A differential pressure type of pneumatic comprehensive measurement approach is put forward, which applies the pneumatic nozzle scanning measurement principle. The minimum zone evaluation and calculation approach for form tolerances based on an improved genetic algorithm is presented considering the characteristics of the measuring point. Finally, the automatic measurement experiment is developed, which can simultaneously measure and evaluate the form tolerances of inner hole in one process.
Forming Ceramic Coating on Al2024 by Scanning Micro-Arc Oxidation
Authors: Lv Peng Xiang , Di Shi Chun , Chi Guan Xin , Wei Dong Bo , Liu Jin Cheng
Published: November 2010

Micro-arc oxidation (MAO) is a novel technique to deposit ceramic coatings on the surface of valve metals such as Al, Mg, Ti and their alloys. The oxide films prepared by this technique have a dense structure, high adhesion and excellent integrated mechanical properties. This technique is especially suitable for the surface treatment of machine parts that work at high speed and have a higher demand for resistance to wear and corrosion. There have been many studies in this field in the last few years. The development of micro-arc oxidation and its applications in industrial field was reviewed. Based on conventional micro-arc oxidation, an innovative scanning micro-arc oxidation technology with visible advantages was developed in this paper. Moreover, verification experiment on scanning micro-arc oxidation was carried out, and the experimental results suggested that scanning micro-arc oxidation could be conduced at a high efficiency but low cost way. At last, the effects of scanning times on film thickness were discussed.
Configuration and Motion Simulation of Multi-Legged Walking Robots with Hand-Food-Integrated Mechanism Arm
Authors: Wang Xin Jie , Wang Liang Wen , Tang Wei Gang , Zhang Xiao Hui
Published: November 2010

The paper introduces the configuration of a multi-legged walking robot with hand-food-integrated mechanism arm. In order to study the kinematics and the dynamics of the robot, three-dimensional entity model of the multi-legged walking robot is built up in solid-works based on inner relation of different simulation softwares. And then the model is leaded in ADAMS to simulate the dynamics and the kinematics of the robot. The paper describes the corresponding process. As an example, the robot ZQROT-1 walking along straight line is investigated. Dynamic parameters of the robot are obtained and analyzed by using ADAMS. The results can be used to optimize the robot structure and to determine its characteristic parameter. The methods and the thoughts of the paper can be referenced to solve similar problem in some aspects.
Analysis and Calculation of High-Precision Heavy Machinery’s Main Driving System for Dynamic Disturbance between Torsional Vibration and Microscale Effect
Authors: Zhao Wu , Huang Dan
Published: November 2010

An analytical method and model were investigated on torsional vibration of complex-branch transmission systems in high precision heavy machinery. In this study, application system dynamic theory, torsional vibration topology network model and its analysis technology were introduced for main driving system, including internal and external damping properties, in particularly considering small perturbation induced by microscale effect on the torsional damping and stiffness. Based on above methods, vibration response of input or output could be effeciently calculated and simulation, which was involved with each the rotation shaft as well as the internal torque response. The modal analysis included amplitude and phase response on reference change or load change, bode diagrams, and time domain simulations. Based on conclusion, the study acquired well consistency between the torsional vibration topology network methods and the other classical methods through the calculation example and simulation. Also the new representation could easy be input for the control system and exploit a new ways on real-time control or fault diagnosis monitor for heavy-duty machinery main transmission system.
Hybrid Projective Synchronization of a New Hyperchaotic System
Authors: Fang Jie , Zhang Xiao Ming , Jiang Chang Sheng
Published: November 2010

The full state hybrid projective synchronization, which includes complete synchronization, anti-synchronization and projective synchronization as its special item, is a novel type of chaos synchronization, so the research in this area has high practical significance. This paper is involved with full state hybrid projective synchronization of a new hyperchaotic system. Based on the stability criterion of linear system, full state hybrid projective synchronization is achieved by appropriate linear separation. Numerical simulation is presented to demonstrate the effectiveness of the proposed method.
Design and Manufacturing of Air Conditioner Panel Hot Runner Injection Mold Based on CAD/CAE/CAM
Authors: Jin Zhi Gang , Jiang Wu Ji , Yu Min Xia
Published: November 2010

Take air conditioner panel for example, it is introduced that the whole process of hot runner injection mold design and manufacture based on CAD/CAE/CAM technology. The panel structure and injection process were analyzed using HuaSu CAE software, then the panel structure was designed using UG/Mold Wizard software, the NC programming and manufacture simulating of the formed parts were done by UG/MACHINE module at last. Compared with the traditional mold design method, CAD/CAE/CAM technology not only can improve the efficiency, shorten production period, but also can reduce the cost of mold design and manufacture greatly.
Optimization Design of Automobile Suspension Springs Based on BP
Authors: Shi Xiao Hui , Gao Hong Li , Xu Ming Heng
Published: November 2010

In order to optimize the arithmetic of the automobile suspension springs, the optimization algorithm of spring stress model based on BP neural networks was proposed. The various models of suspension spring were aggregated and analyzed, the parallel genetic algorithm for the suspension springs was proposed in this paper as well. And the spring models can be optimized fast and efficiently by the algorithm. Aiming at different models, the maximum stress point and the distribution law are given by means of experimental verifications. A new stress analysis method and a new estimate rule for the design of automotive suspension springs are provided by this method.
Design and Analysis of Folding Linkage Based on Five Functional Medical Bed
Authors: Zhang Guang Ping , Zhang Jian Bin
Published: November 2010

Based on the simplex style of the traditional medical beds at home and abroad presently, a new folding mechanism of multifunctional medical bed was presented. After theoretical analysis, an optimal structure was selected. This mechanism consists of several planar four-bar linkages. It has one degree of freedom, which means it can be driven by only one driving torque to achieve multi-states changes. Therefore, it could save the space and reduce the weight of the bed as much as possible. The analysis of mechanism was carried out, simulation and stability were performed as well. A proto was established in the software named Automatic Dynamic Analysis of Mechanical Systems (ADAMS) to verify feasibility of the mechanism and the correctness of the design principle. It is an ingenious and brief design, which provides useful information for future research about folding medical bed.
Study on Compression Sensing Algorithm for Mobile Robot Localization
Authors: Huang Ying , Luo Qi Jun , Gao Qing Ji
Published: November 2010

Redundant data and extra time cost are always exist when the autonomous mobile robot gathers and calculates localization information, using the Nyquist sampling theorem to calculate the sampling time. So an algorithm is studied in this paper, which can dynamically update the sampling period and eliminates the multi-sensor redundant information. Firstly, the observation matrix is renewed timely, according to the real-time state of the robot and the confidence level of sensing information, and the sampling period of sensor can be obtained by the weighted average and normalized method. Secondly, the multi-sensor information will be compressed by the spatial information relevant principle. Simultaneously, the fidelity degree of localization information is monitored timely by the variation function and the compression reliability. Experimental results indicate that this compression sensing algorithm can not only reduce the redundant localization information, but also can guarantee the validity of the localization information.
Genetic Algorithm and its Application in Optimization of Frequency Selective Surface
Authors: Han Jing Yu , Qun Wang , Li Chuan You , Tang Zhang Hong , Shi Mei Wu
Published: November 2010

In this paper, a new genetic algorithm method to optimize the frequency selective surface(FSS) is presented. The optimization speed and definition are promoted by limiting the parameter range and changing the genetic basis. A new cost function is introduced to optimize the multi-frequency of FSS by multi-object optimization (MO). The cirque element was optimized by the optimization method, fabricated by the selective electroless plating on fabric and measured by the arch test system. Test result proves the simulated result coincide with measured result. Result shows that it’s possible to realize different optimizations based on the various applying by this method.
Synchronized Hydraulic Bulging Forming Technology of Three-Layer-Metal Tubes
Authors: Wang Wei Wei , Song Jian Li , Yu Jing Bo , Jia B.B.
Published: November 2010

Synchronized hydraulic bulging forming technology on three-layer-metal tubes was studied. The possibility of three-layer-metal tubes formed by hydraulic bulging method was discussed and proved by elastic-plastic theory. The calculation formulas about the bulging pressure, the residual contact stress and the relationship between them were derived and the main process parameters were analyzed. Finite element analysis was carried out on bulging forming process using MSC. Marc. Practical bulging forming experiments were conducted and well compounded three-layer-metal tubes with tight interfaces were obtained. Through the comparison of the results of theoretical analysis, numerical simulation and practical experiments, proper parameters for the bulging process were obtained and the theoretical analysis was verified and proved.
The Study on Three Gorges Reservoir Geologic Hazard Monitoring Data Communication System
Authors: Liu Yu
Published: November 2010

This paper briefly summarizes structure of actual three gorges reservoir geological hazards monitoring system and introduces methods of monitoring data acquisition and transfer in detail. This paper describes software architecture of using GPRS, Centralized Database Management, Distributed Data Management techniques to provide wireless data communication for geological hazards monitoring system. In this paper the work can be used to clean development mechanism and system provides reliable and low-cost way collect monitor data, regardless of position remote sites website or distribution of monitoring and data collection units.
Tool Life Estimation for High-Speed Machining of Composite Material
Authors: Li Peng Zhong , Zhang Wei Min
Published: November 2010

Tool life is an important index to judge machinability of cutting tool. Wear standard is a necessary considered factor to give tool life. Microwave printed board is composite material, wear standard should be found by tool wear experiment under definite machining environment. Life-span data of cutting tools with different combination of cutting parameters is collected through machining experiment. And then based 2 mathematic models: extended Taylor empirical equation and quadratic response surface equation, with regression analysis method, the mathematical models of relationship between cutting parameters and tool life were given respectively. Through comparison of two regression methods, response surface equation based wear equation is given, determining calculating method of tool life for High-speed Machining of Aluminum Base Microwave Printed Circuit Board. Described method can be popularized according to change of machining conditions.
The Feasibility Analysis of the Double-Curved Positive Displacement Motor (PDM) Into Casing
Authors: Zhu Xiao Hua , Gao Yuan , Liu Shao Hu , Tong Hua
Published: November 2010

To study the feasibility of double-curved PDM into casing, the mechanical model of Φ172 mm double-curved PDM into Φ244 mm straight casing is established. The effect of different structure corners on the feasibility is analyzed for the PDM into casing; and the law of stress distribution is discussed in the paper. The simulation results show that the Φ172 mm double-curved PDM can enter Φ244 mm straight casing favorably by self-gravity when the first structure bend is equal to 1° and the second structure bend is equal to or less than 1.5°. When the second structure corner is equal to or more than 1.75°, PDM needs extra to enter into casing. Within the bounds of common structure corners,when the PDM into casing, the maximum stress value of the double-curved PDM is much lower than yield strength.
To Construct an Individual Credit Risk Assessment Method
Authors: Li Jia Jun , Qin Li Ping , Zhao Jia
Published: November 2010

To achieve low costs and better accuracy of individual risk assessments, we constructed a practical method based on multiple classifiers. The method includes many singal classifiers, such as decision trees and the cluster analysis. And we tested it empirically. The result shows that the application of the method can achieve better accuracy than any single classifier of it.
A New Hierarchy of Evolution Equations and its Integrable System
Authors: Yuan Shu Juan , Chen Mei Xia
Published: November 2010

The second-order matrix eigenvalue problem is discussed by means of the nonlinearization of the Lax pairs,then based on the Bargmann constraint between the potential and the eigenfunctions,a new finite-dimensional Hamilton system is abtained by nonlinearization of the eigenvalue problem and the involutive solutions of the evolution equations are abtained
An Improved Ant-Colony Algorithm Based on Cloud Model Theory
Authors: Wei Xian Min
Published: November 2010

This paper studies one method of cloud model to effectively limit the using Ant-colony Algorithm into local optimal solution, and experimental results show that this Ant-colony Algorithm can improve the speed of global search and optimal performance significantly.
A Novel WebService Architecture Based on REST
Authors: Wei Na , Song Mei Na , Xu Ke , Jiang Chao
Published: November 2010

Aiming at the problem of tight coupling and interface complexity of WebService based on XML-RPC interactive model, this paper proposed the REST-based WebService, and gave out the design method of each part, including the design of restful Resource-Oriented Architecture, design of request and response interactive model and design of service discovery architecture based on semantic search. This research result was applied into an actual project, which indicated this WebService is loose coupling, interface uniform, portability, reliability and has good web-scale scalability features. Finally, an example is presented to illustrate this WebService architecture.