bluuebunny/crossref_metadata_2025 huggingface dataset:
Verification of Accelerated Methods for Determining the S-N Curve
Authors: Przemysław Strzelecki
Published: November 2012

The paper presents accelerated methods for determining the fatigue curve in high cycle fatigue. The estimated fatigue characteristics using these algorithms always show an error, however the applicable literature does not seem to specify how accurate the methods are, which calls for their further examination. To verify the approximation methods, material C45+C was tested to provide reference characteristics. For the experimental results to be received, the test equipment developed applying own design was used. The analysis of the data has confirmed a good operation of the testing machine. To verify the accelerated methods, there was applied the statistics method to compare the coefficients of the regression curve from the experimental data and the coefficients of the analytical regression method. Using that comparison method, it can be assumed that only the estimated curve applying the algorithm by Strzelecki P. & Sempruch J. demonstrates the factors equal to the empirical line.
Study on Damage of a Floating Roof-Type Oil Storage Tank due to Thermal Stress
Authors: Hirokawa Yoshihiro , Nishi Haruki , Yamada Minoru , Zama Shinsaku , Hatayama Ken
Published: November 2012

Several cracks were found on some actual floating roofs of a crude oil tank in the oil refinery located in southern Japan. We assumed that one of reasons would be due to thermal stress caused by temperature changes during the day. In order to consider whether the thermal stress could the cause damages on the floating roof, strain and temperature were measured on the actual floating roof by using optical fiber gauges. Furthermore, thermal stress analysis was carried out as effective analysis.
Research and Simulation on Strengthening Steel Structure with Carbon Fiber Sheet
Authors: Chen Yang Hou
Published: November 2012

Carbon Fiber-Reinforced Polymer(CFRP) Composite Sheets Have Gained Popularity as a Viable Strengthening Technique for Fractured Concrete Structures. the Behavior of Carbon Fiber Sheet Materials to Cracked Steel Structures Is Quite Different from that of Concrete Structures. More and More Attention Are Paid to Research on Strengthening Steel Structure with Carbon Fiber Sheet. this Paper Presents the Study on the Steel Structure Bonded with Carbon Fiber Sheets. the Infinite Element Analysis Software ANSYS Is Used to Analyze the Effects of Strengthening a Steel Structure. and the Test Results of Crack Specimens Strengthened by Carbon Fiber Sheet Are Given. the Finite Element Results and Test Results Show that the Using of Carbon Fiber Sheet Can Improve Load Bearing of Structure and its Fatigue Life.
Experimental Validation and Adjustment of the Semi-Active Suspension Numerical Model Incorporating a MR Damping
Authors: Boukerroum Said , Hamzaoui Nacer , Ouali Nourdine
Published: November 2012

The purpose of this paper is to experimentally validate the performance of a semi-active suspension incorporating a magneto-rheological damper (MR), where the parameters of the numerical models are often poorly adapted to real responses measured experimentally. To ensure a better representation of a real semi-active suspension, we must consider the internal dynamics of the MR damper in its numerical modeling. By adopting models which demonstrate that dynamic, such as the Bingham and Bouc-Wen models, we can approach the measured responses by adjusting their internal parameters. The law control introduction for feedback control of the semi-active suspension incorporating the internal dynamics of the MR damper allows, through the analysis of its robustness and response time, to better assess its performance. To validate the performance of these models, a comparative analysis was made between the experimentally measured responses by the dSPACE system used as an acquisition and control chain and the calculated or predicted responses. A rapprochement between measured responses and those calculated for the same dynamic characteristics of the test bed is possible by adjusting the most influential parameters of Bouc-Wen model.
Experimental Determination of Vehicle Lateral Drift Characteristics under Laboratory Conditions
Authors: Waluś Konrad J.
Published: November 2012

Safe driving requires from the driver several visual-mental activities (perception, recognition and decide) and manual activities relating to the implementation of specific movements. Vehicle responding to the given force is subjected a three axial loads that are transferred through the frictional coupling of tire and pavement Generated during the movement, in particular, curvilinear, lateral drift forces act directly on the tire tread and indirectly by steering to the driver. The value of these forces depends on the angle of the lateral drift, motion parameters and surface type. The paper presents results of experimental determination of lateral forces on the drift the running machine with five-component hub.
Automated Car Seed Limiter for Cars With Electronic Fuel Pedal
Authors: Khairul Ali Hassan Muhamad , Josip Peranchis James , Faidi Kang , Ng Shao Liang
Published: November 2012

With increasing of road network and vehicle’s specification, most of new vehicles will be driven exceeding the posted speed limit. More than half of the fatalities in motor vehicle accidents have been proved to be due to over speeding. To improve the safety of cars EURO- NCAP (European New Car Assessment Program) has a safety rating category that rewards manufacturers for the fitment of electronic stability control. In this paper, we describe the method of using a Microcontroller to Monitor and Reduce the Speed of Cars with electronic fuel pedals. We propose a continuous monitoring method based on speedometer feedback and then vary the input from the cars fuel pedal input that is going into the Electronic Control Unit (ECU) to reduce the cars’ speed. A conceptual model was built to demonstrate the concept using a PIC18 Microcontroller. The fuel pedal is also known as Electronic Throttle Controller (ETC).
Research on Integrated Assembling Technology of Passenger Vehicle Clutches Cover Assembly
Authors: Yan Zheng Feng , Zhang Wu
Published: November 2012

For passenger vehicle clutches cover assembly assembling requirement, the integrated assembling system was designed and considered fully to meet the flexible, reliability and traceability requirements. It realized integration of products and processes, integration of processed and equipment, tooling, conveying equipment, integration of logistics and information flow. It puts forward new solutions about process flow and key equipments and reasonable evaluation method of assembly line.
CFD Simulations for Hydrodynamic Derivatives of High Speed Underwater Vehicle
Authors: Akram Malik Saeed , Guang Pan
Published: November 2012

In this paper, steady CFD method for evaluating the maneuvering coefficients of a small high speed underwater vehicle underwater vehicle is presented. In case of rectilinear flow, spherical domain was created in such a manner that simulations were carried out for different inflow angles without any change in the grid layout. Grid convergence study was also carried out with the intention to achieve cost effective solution. For rotary motion, rotating arm setup was demonstrated and numerically replicated at different angular velocities. The hydrodynamic derivatives were obtained by extracting the slopes of the lift force and moment data points. To gain confidence in CFD results, a comparison was made with available experimental data. It is concluded that CFD approach provides a prediction of hydrodynamic derivatives successfully.
Calculation of Friction Coefficients in Journal Bearings to Determine the Turning Gear Motor Power
Authors: Manoj Kumar A.P. , Nagaraj Nayak S.
Published: November 2012

Steam turbine turning gear is a gear train, driven by electric motor, which is used to drive the rotor at a given speed and capable of breaking away the turbine and its load equipment from a standstill. Steam turbine rotor trains are supported by journal bearing which require lube oil for cooling. The normal turning gear operation requires that lube oil and the lift oil systems must be in-service in order to reduce the friction coefficient at the journal bearings during breakaway. The rotor train breakaway and running torque is the resisting moments at each of the journal bearings. The resisting moments at each journal bearing are functions of bearing loading, pad type, journal diameter and friction. Therefore, it is important to determine the static and dynamic coefficient of friction in journal bearings of the rotor system to design the turning gear motor power. In the present work, a detailed study has been made for calculating the static and dynamic friction coefficients in the bearings and validated the values with experiments for designing a suitable motor to run the rotor of a steam turbine.
Stresses Induced in Saturated Asphalt Pavement by Moving Vehicles
Authors: Pan Bao Feng , Wang Yan
Published: November 2012

The purpose of this paper is to investigate the stresses and excess pore fluid pressure induced by the moving wheel pressure on saturated asphalt pavements. The saturated asphalt pavement is modelled as multilayered poroelastic half space exerted by a wheel pressure, which is moving at a constant velocity along the surface of the pavement. The governing equations for the proposed analysis are based on the Biot’s theory of dynamics in saturated poroelastic medium. The governing partial differential equations are solved by using Laplace and Hankel integral transforms. The numerical simulation results clearly demonstrate the induced deformation and water flow in the asphalt pavement.
A Trimming Method of Experiment Based on Reverse Engineering
Authors: Zang Bo , Liu Bing Li , Tian Yu Wen
Published: November 2012

For the problem of complexity of test steps, importance of test data and diversity of error source, introduces the combination of reverse engineering theory and experiment process engineering, analysis the error in data preprocessing process and feedback test scheme, trimming the error by using reverse engineering theory to get more precise test data. According to a member stretching static test in this paper, verification the implementation effect of method based on reverse engineering in test, provide a new idea about trimming method of experiment based on reverse engineering for engineering application.
Quasi Static Analysis of Anti-Plane Shear Crack
Authors: Hentati Hamdi , Abdelmoula Radhi , Maalej Aref , Maalej Khalil
Published: November 2012

Fracture mechanics has been revisited by proposing different models of quasi static brittle fracture. In this work, the problem of the quasi static crack propagation is based on variational approach. It requires no prior knowledge of the crack path or of its topology. Moreover, it is capable of modeling crack initiation. In the numerical experiments, we use a standard linear (P1) Lagrange finite element method for discretization. We perform numerical simulations of a piece of brittle material without initial crack. An alternate minimizations algorithm is used. Based on these numerical results, we determine the influence of numerical parameters on the evolution of energies and crack propagation. We show also the necessity of considering the kinetic term and the crack propagation becomes dynamic.
Tribological Behaviour and Metallographic Study of Al 2014 Alloy Reinforced by SiC Particle
Authors: Şahin Y.
Published: November 2012

The MMC pins containing 10 wt. % particles with sizes of 45 μm and 110 m SiC particles, and its 2014 Al alloy, produced by liquid casting method were tested against abrasive papers under different conditions. Wear surfaces were examined to determine the possible wear mechanisms by Scanning Electron Microscope (SEM). The wear rate of the composite decreased slightly with increasing SiC particle sizes and increased with increasing load. Furthermore, SEM examination showed that few wear craters, oxidized debris particles were dominant for the composite. For lower loads, grooving and delaminating layer on the wear surface were effective for the matrix alloy. Smoothening mechanisms were also dominated for all three types of materials under higher loads as well.
Structural Nonlinearity Identification Using Perturbed Eigen Problem and ITD Modal Analysis Method
Authors: Kashani H. , Nobari A.S.
Published: November 2012

Identification of nonlinear behavior in structural dynamics has been considered here, in this paper. Time domain output data of system are directly used to identify system through Ibrahim Time Domain (ITD) modal analysis method and perturbed eigen problem. Cubic stiffness and Jenkins element, as case studies, are employed to qualify the identification method. Results are compared with Harmonic Balance (HB) estimation of nonlinear dynamic stiffness. Results of ITD based identification are in good agreement with the HB estimation, for stiffness parts of nonlinear dynamic stiffness but for damping parts of nonlinear dynamic stiffness, method needs some additional improvements which are under investigation.
The Kinematics of Eight-Speed Planetary Gear Hubs for Bicycles
Authors: Hsieh Long Chang , Tang Hsiu Chen
Published: November 2012

Recently, bicycles are used as exercising machines and traffic vehicles. Planetary gear trains can be used as the transmission systems with multi-speed for bicycles. The purpose of this work is to propose a design methodology for the design of eight-speed internal gear hubs with planetary gear trains for bicycles. First, we propose a design concept for the design of eight-speed planetary gear hub. Then, based on this design concept and train value equation of planetary gear train, the kinematic design of eight-speed planetary gear hub is accomplished. One eight-speed planetary gear hub is synthesized to illustrate the design methodology. Based on the proposed design methodology, many eight-speed internal gear hubs with planetary gear trains can be synthesized.
Influence of Hole Shape and Pattern on the Prediction of Limiting Strain for Perforated Commercial Pure Aluminium Sheets
Authors: Venkatachalam G. , Narayanan S. , Patel Nilay S. , Nishant Prabhakar , Sathiya Narayanan C.
Published: November 2012

One of the needs of modern sheet metal forming is reliable knowledge about the formability of a given material. In sheet metal forming formability is usually related to the ability to have high values of the strain until failure, where this failure can be local necking and/or fracture. This high values of strain is called limiting strain which is not only influenced by material but also by the geometric features of sheet material. In this work, influence of hole shape and the patterns in which holes are arranged on limiting strain, are studied using experimental and numerical techniques. Both experimental and numerical analysis reveals the same.
Cutting Tool Condition Monitoring in Machining Processes - A Comprehensive Approach Using ANN Based Multisensor Fusion Strategy
Authors: El Ouafi Abderrazak , Guillot Michel , Barka Noureddine
Published: November 2012

On-line cutting tool condition monitoring becomes one of the most critical requirements in machining processes for improving the efficiency and the autonomy of CNC machine tools. The processes can be significantly improved by using an intelligent integration of sensor information to detect and identify accurately the tool condition under various cutting parameters. This paper presents a structured and comprehensive approach for tool condition monitoring in machining processes using ANN based multisensor fusion strategy. Various sensing techniques are combined to select suitable monitoring indices and several models are proposed to establish the relationship between tool condition and the selected monitoring indices. The proposed approach is built progressively by examining monitoring indices from various aspects and making monitoring decision step by step. The results indicate a significant improvement and a good reliability in identifying various tool conditions regardless of the variation in cutting parameters.
Simulation and Analysis on the Molding Pressure Roller of Lead Flake Based on AMESim and ADAMS
Authors: Li Rong , Luo Jing , He Zu Shun , Peng Zhi Fei
Published: November 2012

In this paper, introduced the structure and speed control principle which are the molding pressure roller of lead flake. Then, the co-simulation technology of AMESim and ADAMS is used to build a mechanical model of the molding pressure roller in ADAMS and build the model of hydraulic system and separation algorithm of PID controller in AMESim. Finally, according to the co-simulation model to analyse the molding pressure roller of lead flake in AMESim simulation interface. Simulation results show that the design of speed control system has good dynamic performance.
Research on Synchronous Control Technique of the Tube Hydroforming
Authors: Yu Jin , Xu Deng , Huang Guo Qing
Published: November 2012

Synchronous control accuracy of side-cylinders of the hydroforming press is a very important indicator , it has a great influence on the quality of products. Generally, people take PID control strategy to improve the precision of hydroforming press. In this paper, a mathematical model of the side-cylinders’ hydraulic system is established and the PID and iterative learning control strategy is used, respectively, to find which one is better . The results show that the iterative learning control strategy has a higher synchronous control accuracy.
Air Leak Localization Method Based on Infrared Thermography Using Local Gray-Entropy Difference Algorithm
Authors: Qin He Hong , Wang Tao , Fan Wei
Published: November 2012

A novel air leak diagnosis and localization method for vessels is proposed. The tempreture field around the leak changes during air inflation and deflation.The changing phenomenon is acquired by thermal camera and the best detecting time is confirmed by temperature curves.Then a local gray-entropy difference algorithm is used to identify the leak area from infrared images captured during inflation and deflation. The gray information of local gray-entropy enhances the difference between leak area and non-leak area largely meanwhile the entropy information of local gray-entropy improves robustness performance.Experiments verify that the leak localization method is effective and sensitive.
Analysis and Numerical Simulation of Leakage Flow of Low Speed High Torque Water Hydraulic Motor’s Plain Flow Distribution Pair
Authors: Wang Zhi Qiang , Gao Dian Rong , Fei Jia Huan
Published: November 2012

In order to ensure volumetric efficiency of low-speed and heavy-torque water hydraulic motor, the relationship between leakage flow and clearance of motor’s plain flow distribution pair in which water is used as medium is analyzed, and it’s concluded that the clearance of port plate and rotor end should be controlled below 5μm. In addition, the port plate flow field was simulated by using CFD software, and got that the leakage flow of numerical simulation is greater than theoretical calculation, and the numerical simulation values are more credible. It is also found that the maximum flow velocity is 16 m/s when outer ring is working, and when inner ring is working the maximum flow velocity is 20 m/s.
Discrete Element Method Analysis of Mechanical Properties of Railway Ballast during Tamping Process under Different Amplitude
Authors: Zhou Tao Yong , Hu Bin , Wang Xue Jun , Yan Bo
Published: November 2012

Railway ballast tamping operations is an important work in the line maintenance and repair operations, the selection of tamping parameter is usually dependent on field trials and practical experience, for the mechanical properties of railway ballast is difficult to measure and describe. This paper creates discrete element analysis model of railway ballast using the discrete element method, the numerical simulations are carried out to study the mechanical properties of railway ballast during tamping process. We focus on the influence of amplitude during tamping process; an optimal amplitude of the simulation analysis is obtained and compared with the recommended amplitude of Plasser & Theurer Company, it is found that the two amplitudes accord. This result verifies the correct validity of the discrete element analysis model of railway ballast during tamping process.
Simulation of Gauge Control System Based on Single Neuron PID
Authors: Xu Meng
Published: November 2012

This paper presents that single neuron PID is applied to the Gauge gap control system, and compares it with PID. Simulation results indicate that control accuracy of Single neuron PID has faster response, stronger anti-interference ability and better robustness.
Analysis of Temperature's Influence on a Digital Displacement Pump's Volumetric Efficiency
Authors: Pedersen Henrik C. , Johansen Per , Yigen Cemre , Andersen Torben O. , Rømer Daniel B.
Published: November 2012

The focus of the current paper is on a small 18 cm3/rev Digital Displacement Pump (DDP), where it is investigated how temperature influency the pump behaviour and static performance. An experimentally validated model of the DDP is presented, which is the basis for the investigation. From the results it is found that although the temperature highly influences the pump behaviour it is possible to mostly compensate for this by accurately controlling the closing angle of the low pressure valve.
The Adaptability Problem Analysis on Structural Response Calculation with Wideband Signals Excitation
Authors: Lv Zhong Liang , Tang Bao Ping , Yan Zhang
Published: November 2012

With the complex and diversified of engineering machinery’s load, the structural response calculation with the incentive of the broadband signal is becoming increasingly important. This paper analyses the adaptability problem on common structural response calculation with wideband signals excitation, and then used specific examples to illustrate the calculation methods problems that may arise in the calculation of broadband stimulus-response. Finally, the way is given to solve it.
A Method of Measuring Rotational Speed for a High-Speed Rotator Based on DSP
Authors: Peng Hao , Li Ze Lun
Published: November 2012

Requirements for the device of measuring rotational speed is high-accuracy, stabilization, credibility, and shorter measuring time during the dynamic-balancing process. This paper studies a way of measuring rotator reference signal based on DSP(digital signal processing). The way of picking-up rotator reference signal, measuring rotator speed are introduced. This new way of measuring rotational speed in high-speed rotor dynamic-balancing measuring system based on DSP is accurate, simple and convenient.
3D Registration Based on Planar Feature Segmentation and Plane Fit
Authors: Wang Hong Ke , Wang Xiao Feng
Published: November 2012

3D reconstruction is used in applications such as virtual reality, digital cinematography and urban planning .The 3D registration is the important part of 3D reconstruction, which is one of outstanding and very basic problems in computer vision. In the paper, considering that there often exist a great number of planes in scenes, we show a planar-feature-based registration method. The planar features from the range image are extracted. Then, we can compute the transformation by SVD between the two coordinate systems and achieve the registration of these two range images.
Research on a Rotary-Percussive Coring Drill for Lunar Exploration
Authors: Li S. , Quan Q. , Tang De Wei , Jiang S. , Hou X. , Deng Z.
Published: November 2012

China is launching the Chang'e project to send automated machine for acquiring the lunar soil and returning to the earth. Thus, we are trying to develop a kind of effective mechanism for the exploration mission of lunar soil coring. This paper presents a rotary-percussive coring drill which is a novel scheme for the deep surface soil acquirement. Two degrees of freedom are included in the proposed drill mechanism. Specifically-designed drill unit including auger and drill bit is employed to finish the coring of the simulant of lunar regolith. We have proposed a novel coring concept named soft-bag coring. Since there is no relative motion between the soft-bag and the cut soil core, the soft-bag method may keep the original stratification of lunar soil. A test-bed has been developed to conduct experimental tests under different drilling parameters and circumstances. The related drilling parameters such as rotary speed, penetration ratio, and percussive frequency are adjusted to adapt to different situations in the experiments. The experimental results indicate that the specifically considered drill mechanism with soft-bag inside can get high coring ratio and excellent stratification of the soil.
Experimental Study on Reflective Optical Fiber Hydrogen Sensor Using Two-Wavelength Light Sources
Authors: Deng Xian Ling , Zhou Chuan De , Li Ze Lun , Wang Xin Gang
Published: November 2012

Nowadays, optical fiber hydrogen sensor is one of most important potential of optical fiber sensors. Currently, there are a lot of explorations around this aspect. This paper uses experimental method to study reflective optical fiber hydrogen sensor with two-wavelength light sources. Firstly, the experimental principle was introduced. Based on the principle, experimental scheme, devices, and process are described. By the experiment, the reflectance is the output as the main result. The experiment results describes at last.
The Design of Mechanical Grates Experimental Device of Municipal Solid Waste
Authors: Zhu Xin Cai , Li Peng , Guo Lei , Ding You Qing , Lin Shun Hong
Published: November 2012

In order to research the impact of the structure parameters of mechanical grate on MSW(Municipal Solid Waste) movement characteristics such as transportation speed, average stop time and mixed rate of waste, a kind of mechanical grate cold experimental device has been designed. This device can realize the switch between push forward and backward. Many structure parameters can be adjusted such as the height of grate, move distance of grate, bed angle, and move speed of the grate. Based on Mechanical grate cold experimental device, to study the impact of the mechanical grate structure parameters on the characteristics of waste movement is conducive to applying the results of test to the actual MSW grate incinerator. It provides a strong basis for the improvement and optimization of the mechanical grate furnace in terms of characteristics of Chinese MSW.
The Study on the Performance of Two Drive Forms of Centrifugal Atomizer
Authors: Zhu Xin Cai , Hu Teng Fei , Guo Lei , Zhou Xiong , Ding You Qing , Deng Xing
Published: November 2012

High speed rotating centrifugal atomizer is the key part in the flue gas processing. The different driving form affects the atomizer's stability of high speed movement, atomization effect and the running life directly. For a long time, the transmission quality of belt drive or direct coupling drive is one of the focus issues. Based on the high speed centrifugal atomizer, this paper introduces the two commonly used driving forms of the atomizer, and compares their performance through the experiments.
A Framework of STEP-NC Manufacturing System Integrating CAD, CAPP, CAM and CNC
Authors: Han Zhen Yu , Hu Po , Han De Dong , Fu Hong Ya
Published: November 2012

This paper outlines a conceptual framework of STEP-NC manufacturing system, which integrates the entire manufacturing process including CAD, CAPP, CAM and CNC, to make full use of the advantages of the new generation of data model. The STEP-NC manufacturing system consists of five parts and the STEP-NC standard is used to transport the complete product information. The intelligent CNC in this system can parse STEP-NC program directly so that no translation is needed and the part programs are reusable. Networked manufacturing can be realized by implementing this new framework of STEP-NC manufacturing system.
The Simulation of the Circumfluence and Inhomogeneous Flow Field in Pulsing Electro-Floatation
Authors: Deng Xiao Gang , Zhou Xiong
Published: November 2012

Due to the large-scale violent circumfluence occurred in the traditional electro-floatation (TEF), the interference to the mixture of micro-bubbles and floccules should not be neglected in the floatation. In this paper, the Pulsing Electro-Floatation (PEF) using square wave impulse direct current has been presented. The circumfluence in the inhomogeneous field of the PEF would be gentler than TEF, and the energy utilization rate would be improved. Based the theory of multiphase flow continuous medium, the conservation of momentum equation in the inhomogeneous flow field of PEF has been obtained, and liquid-bubble flow field of the PEF has been simulated using the Fluent module of the ANSYS 13.0. The research result shows that the inhomogeneous flow field in PEF has more reasonable energy distribution, less extent of circumfluence in the process of the micro-bubbles floating, and more benefit for the development and floatation of the bubbles-floccules mixture compared with the TEF. With the same current density, the energy consumption of PEF is 1/4-1/3 that of TEF, but has the similar floatation effect with TEF.
Simulation Analysis of the Counterbalance Valve Used in Cranes Based on AMESim Software
Authors: Ji Xu , Liu Xin Hui
Published: November 2012

This paper presents the structure and working principle of counterbalance valve used in some hydraulic cranes. Based on the AMESim software, the model of the counterbalance valve is build, and the simulation analysis for its performances is done. The simulation results show that the valve has a good dynamic response performance and stability, its control spool opening is independent of the load, and the main concerned structural parameters can affect the performance of the counterbalance valve.
Shear Transmission of Magnetorheological Fluid in Fan Clutch
Authors: Wang Jiu Hua , Ren Lian Cheng , Lei Zhen Zhen
Published: November 2012

A magneto-rheological (MR) fan clutch is a device that transmits torque by the shear stress of the MR fluids. In this paper, Bingham model is used to describe the constitutive characteristics of MR fluids subject to an applied magnetic field. The operational principle of the MR clutch is introduced. The torque transmitted by MR fluids is analyzed to compute the torque transmission ability in the MR clutch. The results show that with the increase of the applied magnetic field, the torque developed by MR fluids goes up rapidly.
Optimalization Data Processing Result of Integrated Media Plan System (IMPLANS) to PT. CS Media Customer Satisfaction
Authors: Gaol Angga , Gaol Ford Lumban
Published: November 2012

This study is motivated by the difficulty of determining the strategic placement of advertising material on television, in the media world is often called the Media Plan. A common deficiency is the long turnaround time strategy is less precise data. This can affect the user satisfaction data plan media strategy is the customer of PT. CS Media. Integrated Media Plan System (IMPLANS) was built to help the media strategy plan in order to maintain customer satisfaction, but it is still necessary to study the factors that can influence factors of IMPLANS to customer satisfaction. The purpose of this study is to optimize the data processing of IMPLANS to customer satisfaction. The methodology used in this study is a quantitative 17 users at PT. CS Media. The results of questionnaire were analyzed using multiple linier regression against the hypothesis of the influence of each variable. Also done some data validity to support the level of confidence of the survey results. The result of this study, there are three e-ServQual variables significantly to customer satisfaction, that is Responsiveness, Flexibility, and Ease of navigation. Based on this study found some more optimal system development.
Optimization Performance Measurement of Managed Service Division in ITIL Framework Using Statistical Process Control
Authors: Suhairi Kasman , Gaol Ford Lumban
Published: November 2012

The purpose of the Configuration Management process is carrying and all IT assets, status, configuration, and relationship between each other being well documented. This documentation is useful, among others, for some purposes. The first objective is to create clarity in the relationship between key performance indicators (KPI) an IT services with the infrastructure. Changes to the configuration of those devices would obviously very disturbing the performance of IT services. The second objective is the accuracy of the information which will be used by the Service Delivery processes. So a Service Desk staff who need to get information about how a user at a branch office to connect to the network's headquarters, linked to issues of access to certain applications.
In Situ Laser Build-Up Welding of Shipboard Crankshafts
Authors: Torims Toms , Ratkus Andris , Zarins Marcis , Brutans Valdis , Vilcans Janis
Published: November 2012

Renovation of marine diesel engine crankshaft main and crankpin journals surfaces is usually done when ships engine is undergoing repairs. Often heavy working conditions and intensive wear accompanied with lubrication failures require a complete renovation of these worn-out surfaces. In most of the cases these repairs are done in the workshop, by removing crankshaft from engine and subsequently performing journal grinding. Where it is necessary also various types of build-up operations are carried out. Final technical requirements for these repairs are demanding: fine surface quality, geometrical accuracy and high surface roughness (texture) parameters have to be ensured. Although available technologies are able to deliver these results, they are very expensive, time consuming and usually can be done only in workshop conditions by highly sophisticated and expensive grinding machinery. This article describes novel technology which has been developed to perform crankshaft crankpin journal surfaces grinding operations directly in engine housing. Furthermore, a comprehensive study of laser build-up techniques and their potential applications for marine crankshaft specifics is outlined. Study confirmed that previously adopted grinding platform can be extended to laser cladding technology. It suites well shipboard crankshaft surface renovation needs and opens an entirely new industrial application dimension to the laser cladding technologies. Combination of these in-situ grinding and laser cladding technologies can bring considerable economic benefits and save the valuable marine diesel engine repair time.
Asymptotic Properties of Neutral Stochastic Functional Differential Equations with Infinite Delay
Authors: Hu Rong , Shao De Jun
Published: November 2012

This paper considers the existence and uniqueness of solution to neutral stochastic functional differential equation with infinite delay with local Lipschitz condition but neither the linear growth condition. And we discuss the asymptotic properties of this solution including moment boundedness and the almost sure stability. The stability is more general and representative than the exponential stability. This investigation uses a specific Lyapunov function based on usual methods. To illustrate our idea more carefully, we introduce a function, which will be used as the decay function. A One-dimension nonlinear example is discussed to illustrate the theory.
3D Virtual Simulation of Beam Pumping Unit Motion Based on Inverse Kinematic
Authors: Liu Fang , Liu Xian Mei
Published: November 2012

The movement of beam pumping unit is a kind of involute moment. The exiting virtual reality engines provide translation, rotation and zooming, which belong to the category of the forward kinematics. It is difficult to simulate the beam pumping unit movement based on forward kinematics. The paper first analyzes the motion rule of beam pumping unit, and then introduces the forward kinematics method (FK) and the inverse kinematics method (IK).According IK, the paper establishes the motion model of beam pumping unit, in the motion model the donkey head is seen as the end effector.The paper finally realizes 3D virtual simulation of beam pumping unit motion based on IK. The method of using IK to simulate the motion of beam pumping unit is is proved to be correct by contrasting the simulation results between using FK and IK.
An Time Domain Analysis Approach to Measurement of Three Dimensional Shape Distortion
Authors: Xia Sen
Published: November 2012

Autocorrelation function and cross-correlation function can be used to illustrate the dependency relation of random processes. The degree of mini-transmutation is often too small to detect. A new approach via utilization of correlation coefficient between two different signals in time domain was proposed to measure the tiny distortion of three dimensional objects. The correlation analysis and deduction on transformation from 3-D surface distribution to 1-D time series signal were made rationally. Numeric simulation experiments of discrete digital signal generated from triangular function composite generator were done and six groups of correlation coefficient curves were given deliberately with different signal length. The correlation and similarity degree among different similar waveforms were analyzed in detail. It shows that the approach is valid to detect the degree of distortion between the original standard one and the practical one.
The Power Plant Boiler Automatic Control Based on PLC
Authors: Zhang Yao Yuan , Zhang Zi Sheng , Yu Jie , Guo Wei , Liu Zhi Qing
Published: November 2012

The power plant boiler automatic control system is designed on the basis of Siemens S7-200 in this paper. Based on the introduction of the Siemens S7-200 and the works of the boiler, the total power plant boiler control system is designed in details. Besides the initialized program is designed based on the input and output address of all the switches. The communication program is achieved, including the initialization of the program running parameters, the call of the system subroutine, the calculation of the checksum, the real-time data receiving process, etc. Finally, the heat energy is successfully and automaticly converted to the electricity in the boiler based on the PLC.
A Simplified Method of Simulation for Aircraft Performance Parameters in Air Traffic Control
Authors: Li Xin Sheng , Li Gang , Xiao Cao , Lan Shi Yong
Published: November 2012

In order to simplify the traditional methods for simulating aircraft performance in ATC, a method is proposed in this paper by the flight aerodynamics theories, normal and maximal climb rate in steady climb motion and acceleration/deceleration of Straight-and-Level Flight of performance computation. This method can be used to simulate acceleration, deceleration, and climb/descent rate of usual civil aircraft types. It is convenient and useable compared with the traditional complex methods which need input many parameters manually in air traffic control (ATC) simulation. The experimental result listed in this paper coincides with the basic flying rules of aircraft types such as 737-300, A310-300, B747F, Y-7. The application of this method in the real ATC simulator for controller training proved its function and effect.
Dynamical Simulation of a Knotless Netting Based on Explicit Method
Authors: Zhou Cheng , Xu Liu Xiong , Zhang Xin Feng , Zhu Guo Ping
Published: November 2012

Based on finite element analysis and explicit Euler method, the present study visualized the dynamical simulation of a knotless netting in R environment. In the physical models, the linking between knot and twine were considered as a mass-spring system. Vector algebra methods were applied to analyze the hydrodynamic forces and tensile forces of the spring. To solve the equations numerically, explicit Euler method was introduced for the mechanical system to achieve the stable solutions. A package of scatterplot3d in R program was transferred to realize the visualization of the knotless netting in three-dimensional space. The results of dynamical simulation were displayed distinctly to show the sinking processes and equibibrium state of the knotless netting in the sea water.
Simulation of Automotive Engine Lubrication System Based on AMESim
Authors: Gu Ning , Pei Mei Xiang , Tao Hong Ying , Liu Yu Heng
Published: November 2012

In order to increase automotive engine development efficiency and reduce the cost, a simulation model is often used, in this paper, with software AMESim the automotive engine lubrication system model was built to simulate the steady lubricant flow rate and pressure in the system at difference engine speed. Comparison between simulation and measurement on the test bench shows that the simulated results are in good accord with experimental data, the lubricant flow rate deviation is less than 3.5% and the pressure deviation at the measurement points is less than 4.0%, so it can be concluded that the model can be used to simulate the automotive engine lubrication system steady lubricant flow and furthermore optimize the system.
A Modified Volumetric Penalization Method for Gray Elements Suppression
Authors: Li Ming , Tang Wen Cheng
Published: November 2012

The volumetric penalization approach is an important method for gray elements suppression in topology optimization. With the volumetric penalization approach, the topology optimization problem is consistent and regularized, and topology description is unambiguous. Considering the fact that an unreasonable topological form of structure is sometimes resulted with the traditional volumetric penalization function, a modified function is proposed. By utilizing the modified function, the gray elements are compelled to be 0 or 1, and the efficiency of optimization solving is also improved. To verify the validity of the modified method, it is compared with the famous volumetric penalization method, SINH method, through a typical example. Simultaneously, its numerical instabilities are also analyzed.
Effects of Wet Activation Process Parameters on Surface Hydrophilicity in Silicon Direct Wafer Bonding
Authors: Nie Lei , Yu Jun Xing , Zhang Kun
Published: November 2012

Wet activation is a very important step in silicon direct wafer bonding process and a optimized activation process is desirable to improve the surface hydrophilicity. Therefore the pivotal parameters of activation process were investigated which were volume ratio, holding time and treat temperature. A orthogonal experiment array was designed to reveal the effects of these parameters and the experiment results were analyzed by range analysis method. The analysis results indicted among those three parameters, everyone had intimidate relationship with surface hydrophilicity, which was indexed by contact angle. And higher concentration, longer holding time and higher treating temperature in possible value range were more desirable. Based on these conclusions, optimized activation process was desigened using which void-free bonding was realized.
Research and Application of Growth Management System of Plant Based on Growth Model
Authors: Liu Xu Ning , Zhang Jing , Fan Ya Bin , Chen Xu
Published: November 2012

In order to improve the decision performance of expert system, then the growth simulation model based on expert system is proposed. The paper discussed the structure and functions of plant growth model, and analyzed the related techniques and so on, and the structure and functional modules of growth management system are introduced at first, then the growth model of plant is made, the expert system is used to carry out decision-making on the growth of plant, then the visual simulation model is used to simulate the growth management and yield of plant. Research result has shown that the system can perform well and help the managers to provide decisions for the management of plant. Research and development of this system provide technical reference for the development of new agricultural expert system.
Static Scheduling Model and its Heuristic Algorithm for Agile Supply Chain Based on Schedulable Periods
Authors: Wang Jian Hua , Mei Qiang , Huang Xian Feng , Luo Jian Qiang
Published: November 2012

Agile supply chain must possess the ability of utilizing alliance corporations’ production capacity fully in a systematic view, in order to meet the market demands and its changes quickly and economically. Powerful scheduling techniques are the key support for supply chains’ agility. Based on the discontinuous schedulable periods of suppliers, an agile supply chain static scheduling under schedulable periods (ASCSSSP) of multiple optional suppliers for each part is studied. According to the final product’s supplying BOM, this paper sets up a structural framework model for agile supply chains firstly, then analyzes and builds a mathematic model for the task assignment and schedule optimization of ASCSSSP with the supply-demand time and quantity constraints, and especially designs a novel heuristic algorithm of Task Adjusted by Cost (TAC) to solve the model. Finally, by some numerical experiments, the efficiency and practicability of the model and algorithm is verified by contrasting analysis.
Optimal Forecasting Technique in Reducing Supply Chain Amplification
Authors: Wang Xun , Wang Jing
Published: November 2012

This paper investigates the optimal forecasting method in reducing supply chain amplification, a.k.a., the Bullwhip Effect. By using a simple replenishing policy and solving Stein Matrix Equations, the relationship between input and output covariance matrices is derived. Both analytical and simulational results support the opinion that proportional forecasting is superior in bullwhip mitigation. There exists trade-off in reducing variance amplifications in order and inventory. For different control objectives, we propose optimal proportional controllers.
Friends Recommendation Algorithm Based on Graph Mining and Collaborative Filtering
Authors: Bin Zhang , Dong Wang Xiao
Published: November 2012

As an open, free, flexible social platform, microblog develops rapidly recent years. State of art research on friends recommendation has attract both industrial and academical concerns. Compared with traditional social networks, microblog contains both strong social relations based on the real relationship, and weak social relations based on interests, locations and other incidental factors. How to utilize these relationships and characters in personalized friends recommendation is still under research. This paper presents a new hybrid recommendation model, considering both the relationship strength and interest similarity in microblog, using the social graph mining algorithm to find strong social relations and the item-based collaborative filtering algorithm to mine weak social relations. Experimental results show that the proposed hybrid algorithm outperforms the traditional algorithm.
GA Optimized Binary Tree SVM for Analog Circuit Fault Diagnosis
Authors: Dong Bao Yu , Ren Guang
Published: November 2012

This paper presents a novel method of analog circuit fault diagnosis based on genetic algorithm (GA) optimized binary tree support vector machine (SVM). The real-valued coding genetic algorithm is used to optimize the binary tree structure. In optimization algorithm, we use roulette wheel selection operator, partially mapped crossover operator, inversion mutation operator. In simulation experiment, we use Monte-carlo analysis for 40kHz Sallen-Key bandpass ﬁlter and get transient response of ten faults. Then we extract feature vector by db3 wavelet packet transform and principal component analysis (PCA), and diagnose circuit faults by different SVM methods. Experiment results show the proposed method has the better classification accuracy than one-against-one (o-a-o), one-against-rest (o-a-r), Directed Acyclic Graph SVM (DAGSVM) and binary tree SVM (BT-SVM). It is suitable for practical use.