bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Partial Least-Squares Regression in the Prediction of Concrete Strength Taking into Account Interactional Items Among Independent Variables
Authors: Jiang Jian Ping
Published: September 2011

Based on partial least-squares regression taking into account interactional items among independent variables, this paper had a prediction on concrete strength at the 28th day. Taking proportion of flyash in cementing material, usage amount of cementing material, ash-water ratio as independent variables , and concrete strength at the 28th day as dependent variable , the forecast model of concrete strength was obtained. It was found that press residual value decreased with the increase of number of latent variables, and number of latent variables were three according to Press residual value versus number of latent variables. The normal regression coefficient of ash-water ratio was the largest in three influence factors, this indicated that the influence of ash-water ratio was largest to concrete strength at the 28th day; The determination coefficient of forecast model obtained in this paper was 0.9353, the error of forecast model was. The following conclusion can be drawn that, the model is accurate and credible, and the partial least-squares regression taking into account interactional items among independent variables is a eximious non-linear method, and it is worthy to spread its application in the forecast analysis of concrete strength at the 28th day.
The Impact of Helical Gear Parameters Based on Axial Meshing Transmission on Swash Plate Pulse CVT Characteristics
Authors: Sun Jian Dong , Tian E. , Lei Hong , Liu Zi Ping , Fu Wen Yu
Published: September 2011

A new structure of mechanical pulse CVT –rotational swash plate pulse CVT was put forward. This paper analyzed the impact of helical gear parameters on swash plate pulse CVT characteristics, it can be seen that the angular velocity of output shaft is proportional to the angle between Swash plate surface and vertical cross section of the input shaft and the swash plate surface, the gear modulus has no effect on the transmission ratio, the guide rod pitch diameter is the major factor contacting gear tooth Strength, when the other parameters unchanged, ( is the pitch helix angle)is proportional to the output torque, and is inversely proportional to the output torque.
Prediction of Ultimate Bearing Capacity of Prestressed Pipe Pile Based on BP Neural Network
Authors: Jiang Jian Ping
Published: September 2011

Based on BP neural network, this paper had a prediction on ultimate bearing capacity of prestressed pipe pile. Taking pile diameter, effective pile length, ultimate average value of friction standard value, ultimate average value of end resistance standard value as influences factors, the prediction model of pile bearing capacity based on BP neural network was obtained. It was found that, the average value of absolute value for the relative error of fitting value of pile bearing capacity compared with the observed value for 70 groups of independent variables training BP neural network model was 3.1498%; And the average value of absolute value for the relative error of prediction value of pile bearing capacity compared with the observed value for 10 groups of independent variables validating BP neural network model was 3.50126% whose precision was better than ANFIS’5.32293%. The following conclusion can be drawn that, the prediction model of ultimate bearing capacity of prestressed pipe pile based on BP neural network is feasible.
Kinematics Simulation on a Kind of Parallel Mechanism
Authors: Pan Xue Hai
Published: September 2011

The kinematics simulation of 6-PURU parallel mechanism was made based on dynamics simulation analysis software ADAMS, and the simulation method and steps were introduced too. Using UG to establish 6-PURU parallel mechanism soiled model, and the geometry model parasolid format was payloaded to ADAMS environment and established virtual prototyping model, by added some drivers and SPLINE curves, the model was conversed with positive kinematics simulation. This method avoided to establish and solve complex kinematics equations, simplified the design and development work of the parallel robot, but also provided theoretical basis for adjustment and control of prototype.
Injection Molding Process Parameter Optimization for Warpage Minimization Based on Moldflow
Authors: He Hua Bo , Wu Fei Lin , Deng Yi Min
Published: September 2011

By the combination of orthogonal experiments and moldflow simulation analysis, the warpage of a thin-wall injection molded parts is analyzed under the combined effects of multi-molding process parameters. By this method, it can gain the experiment data which can basically reflect the overall situation using fewer number of simulation analysis. In addition, the effects degree of different molding process parameters for warpage are researched, and the optimized parameter combination is obtained. It can avoid the one-sidedness of individual analysis of the various factors and solve the unreasonable appearance of process parameter settings. With the help of results, it can fasten the mold developing schedule, thus shorten the cycle of product development, and improve the quality of products and the competitive ability of enterprise.
Design and Finite Element Calculation for Driving Shaft of Eccentric Multi-Axes Rectangular Shield Machine
Authors: Zhuang Qian Wei , Lv Jian Zhong , Jiang Hua Qin
Published: September 2011

This paper introduced the characteristics of eccentric multi-axes rectangular shield machine and made comparisons to traditional earth pressure balance shield machine. And introduced structure form of eccentric multi-axes, and carried out calculation of cutter head driving. The author completed the finite element calculation of eccentric axis with COSMOS Works, the results of calculation shows that maximum stress occurs at the place at gear keyway of eccentric shaft, but the eccentric shaft can satisfy the requirements in shield design according to big load in cutting soil. Finally, the eccentric shaft was applied in several engineering cases without any structural problems.
Dynamic Characteristics Modeling and Simulating for Fixed Differential Overflow Valve by Power Bond Graph
Authors: Bo Ji Kang
Published: September 2011

This paper introduces the dynamics model and mathematical characteristics of the constant difference of overflowing pressure with computerized simulation by power bond graph of the fixed differential relief valve hydraulic system on simplified vertical planetary internal grinder, which puts forth proposals to design hydraulic circuit or component. Simulation shows that, when the load changes more than 50%, the speed of cylinder piston changes less than 0.31%, and the efficiency of the hydraulic system has also been greatly improved, which matches the experiments. It makes certain reference to the design of the hydraulic system in which the load changes large.
System Design and Simulation on Powertrain of Electric Vehicle
Authors: Xi Ping Yuan
Published: September 2011

With the issue of environmental pollution and energy crisis worsening day by day, the researches and applications of low-pollution and high energy-efficient electric vehicles have become the research trend in the automotive area nowadays. On the basis of analyzing the requirements of pure electric vehicles’ drive motors and power batteries, this paper makes a reasonable selection of the basic parts’ type of pure electric vehicles’ powertrain and the parameters matched. The matching parameter is proved to be reasonable by simulation.
Multi-Objective Optimization of Inertia Equilibrium in Ultra High Speed Stamping Machine
Authors: Bai Jian Yu , Tong Sen Lin , Zheng Di
Published: September 2011

With the development of manufacturing industry, the stroke speed of stamping machine is higher and higher. In accordance with the development, researchers and engineers have paid more and more attention to developing various types of ultra high speed stamping machines. The key to develop ultra high speed stamping machine is to solve the problem of inertia equilibrium. This paper presents an optimization approach for multi-objective inertia equilibrium design for ultra high speed stamping machine. Simulation results demonstrate the effectiveness of the proposed approach.
Mathematical Modeling for Air Refueling under Once-Takeoff Situation
Authors: Yuan Qin , Xu Ya Tao , Song An Qi
Published: September 2011

Air refueling technique, which has been developing for a century, displays much more important strategic significance and wider application prospect on operation and material transport in nowadays. This article begins with an exploratory problem, and by use of a modeling method, it calculates the maximum operational distance of the main fighter under once-takeoff situation for flying tanker. The key point of this article lies in that we strive to design the optimum program to group the flying tanker fleet and then control the air refueling opportunities. Heuristic rules and mathematical tools are mainly used to achieve our target.
Optimum Placement of Friction Reducer in Extended Reach Well
Authors: Sun Lian Zhong , Gao De Li
Published: September 2011

There are some problems such as down hole torque & drag, casing wear and so on in extended reach drilling. Therefore, friction reducers are used widely to keep the drillstring away from the cased hole in extended reach drilling. Currently, the optimum placement of friction reducers is dependent on the drillstring deflection. Friction reducers are often connected to drill pipes by tool joints, which limits their optimum placement. In addition, the placement of the first reducer is often determined by drilling engineers’ experience. The effect of friction reducer on torque & drag is assessed in this paper and the optimum placement of friction reducer is obtained to minimize the torque & drag.
Analysis on Damage Effect of EPW Blasting in Certain Deepness of Blindage
Authors: Zhu Zhan Fei , Shi Quan , Wang Guang Yan , Lu Hang
Published: September 2011

In order to study the influence of charge weight and blast position on damage effect of EPW (Earth Penetrating Weapon), theoretic analysis was combined with experiment data, the model of volume of funnel pit formed by blast was set up based on supposing that the warhead was instantaneous spherical explosion and the fragments’ destructive effect could be neglected, then the model was discussed in detail. The results are helpful to the launch and control of the EPW and have reference value for the building of contravallation and underground blindage.
An Optimal Algorithm for a Special Flow Shop Problem with Infinite Buffer Capacity
Authors: Wei Qi
Published: September 2011

In this paper, a two-machine flow shop problem with infinite buffer capacity is considered. Each of jobs is identical and has two tasks. The first task can be processed on either machine, called flexible task, while the second task must be processed on the second machine and can't be processed unless the first task has been processed. There is infinite buffer capacity between two machines. The problem is to determine the assignment of the flexible tasks to the machines for each job, with the objective of maximizing the makespan. We present an optimal algorithm for this problem.
The Dynamic Stress Characteristics of Air-Decked Bench Blasting under Soft Interlayer
Authors: Wu Liang , Yu Dong Xiao , Duan Wei Dong
Published: September 2011

In modern mining and project construction, how to make use of the explosion energy effectively is the key technology demanding prompt solution at present. The application of air-decked blasting technology has enabled the efficient use of explosion energy, which proves that the air-decked blasting technology can overcome many disadvantages caused by column charge effectively, getting ideal explosion effect. Based on the dynamic finite element analysis software with the material model of Mat-Plastic-Kinemetic, the dynamic stress characteristics and failure mechanism of blast-hole near-field with level soft interlayer are researched with different air-decked charge structures. There is significant effect on the rock at the middle of blast-hole if top-air-decked charge structure with indirect initiation and middle-air-decked charge structure with two ends initiation at the same time. If bottom-air-decked charge structure with indirect initiation, soft inter-layer don’t change the peek of compression and tensile stress curves of typical elements with distance from the bottom of hole, so there is not effect significantly of level soft interlayer on bottom-air-decked charge structure with indirect initiation.
Optimization of the Elevator Speed Control System
Authors: Yu Wen , Xu Li , Sun Shu Li
Published: September 2011

In order to meet the demand of social development, improve the speed and comfort during elevator running process, the elevator speed control system is studied in this article. One new elevator speed control method is put forward. The implementing process of the new method and the design of elevator speed curve are elaborated in detail. The new control method has good utility in improving the running efficiency and the riding comfort for the elevator.
Dynamic Stability Analysis of High-Level Order-Picking Truck
Authors: Wang Yi Qiang , Fu Chao , Luo Wei
Published: September 2011

More and more high-level order-picking trucks are used to pick and transport goods in warehouses. The dynamic stability of the truck has great effect on operation efficiency, quality and safety. It is instructive and meaningful for the optimization of structure and control strategy to analyze the dynamic stability of the truck. Firstly, the dynamic model of the order-picking truck is established using Alembert principle, and then the dynamic stability of the truck is analyzed. Secondly, the virtual prototype model of the truck is established and traveling process is simulated. The simulation further verifies the dynamic stability of the truck.
Research of Product Virtual Digital Model Design Based on TurnTool
Authors: Zhang Feng , Wang Wei Wei
Published: September 2011

The mainstream Web 3D making tools were analyzed in this study. And the main constituents of Turntool software, featured of three-dimensional digital model, were introduced. The adoption of CAD digital model produced in the industrial design process and methods and steps of using Turntool technology to make virtual digital model is analyzed combined with cases to discuss its key technical essentials. By recruiting web publishing technology, Turntool virtual digital model with static pictures were combined to produce brand-new dynamic product rendering, which solves the problem of effective combination of texts and graphics and improves the visual effect of product display.
Dynamics Modeling and Simulation of a Six-Wheel All-Terrain Mobile Robot Based on ADAMS
Authors: Li Yan Jie , Wang Fu De , Kou Zhi Hui
Published: September 2011

A novel structure of a six-wheel all-terrain mobile robot with the integration of active and passive control is presented in this paper. According to different complex terrain environments, three-dimensional simulation models of the six-wheel all-terrain mobile robot were built using ADAMS software and the dynamic simulation analyses under different terrain conditions were accomplished. Using the ADAMS model, the kinematic and dynamic characteristics curves of the whole robot and parts of robot were obtained. The simulation analyses provide the theoretical basis for the optimization of the mechanical structure, control system design and the selection of drive motors. Simulation results show that the structure of this kind of robot has good mobility and obstacle-climbing performance.
Research on Force Parameter and Deformation Mechanism in the Cold Rolling of Bearing Inner Ring
Authors: Sun Bao Shou , Qi Liang Tao , Shu Xue Dao
Published: September 2011

In this paper, the simulation model of the cold rolling process of the deep groove bearing inner ring was established by using the finite element software Deform-3D. The numerical calculation of the model was made with different process parameters. The law of the influence the process parameters on the rolling force was analyzed. The deformation mechanism of the cold rolling process of the inner ring was revealed. The research indicated that the feed rate of idle roller had the greatest influence on the cold rolling process. Finally the experiment using the XS-50 precision CN ring rolling machine was carried on and a finished product of the inner ring of a better quality came out. It verified that the numerical simulation could provide theoretical basis for the practical production process.
The Optimization Simulated Analysis of Permanent Magnet Linear Synchronous Motor
Authors: Tan Hai Jun , Zhang Mei Qin , Tang Cheng , Li Lei
Published: September 2011

Permanent magnet linear synchronous motor (PMLSM) is a new type of motor with high positioning accuracy. This paper introduces the related design theory of PMLSM with the utilization of finite element software. we refer to the sample transient electromagnetic analysis, firstly. And then get the Thrust fluctuation map and compare to its winding back EMF curve and other related graphs. Through altering of the thickness, air gap length, junior core’s structure and size and other parameters, we finally conclude the designed requirements will be eventually fulfilled this optimization.
Prediction of Fiber Diameter of Melt Blown Nonwovens Produced by Sharp Die Using Neural Network Theory
Authors: Zhao Bo
Published: September 2011

Melt blowing is known for directly converting polymer resin into nonwoven fabrics of microfibers. The fiber diameter of melt blown nonwoven fabrics is strongly influenced by the air jet flow field developed from the sharp die. The dual slot sharp die is often used to yield polymer fibers in this process. The objective of this paper is to investigate the fiber diameter of melt blowing nonwovens produced by sharp die using an artificial neural network model. The fiber diameter of melt blowing nonwoven is mostly influenced by processing parameters (polymer flow rate, polymer melt temperature, initial air velocity, die-to-collector distance and initial air temperature). By analyzing the results obtained with the aid of the ANN model, the effects of melt blowing process parameters on the fiber diameter can be predicted. The results demonstrate that ANN model is a effective and a excellent method for predictors.
Prediction of Unused Production Capacity of Manufacturing Suppliers Based on Electricity
Authors: Luo Liang , Li Guo Fu
Published: September 2011

In supply chain, manufacturing suppliers may provide incorrect information to purchasers because of fierce market competition and privacy protection. This paper proposed a convenient method of obtaining production information based on electricity and forecasting suppliers’ Unused Production Capacity based on electricity. With fuzzy cluster-analysis technique and virtual variable-regression analysis method, the relation model between months’ electricity and product quantity was constructed. Then achieve a forecasting model of unused production capacity using gray-theory and Ordinary Least Square according to recent months’ electricity. And the example was discussed, the predicting results will provide decision-making basis for purchasers.
Research on Screw Thread Form Based on Non-Contact Measurement
Authors: Shen Shao Feng , Wang Xian Cheng , Chen Jun Hua
Published: September 2011

There is a problem with non-contact measurement and detection, which reduces its measurement accuracy. Methods developed for measuring and inspecting screw thread characteristic parameters usually using a camera, which is controlled to scan the projection of thread in the parallel optical field to obtain thread images. However, with the block of screw line on the projection of the real thread form, it is impossible to acquire the real thread form from images. The traditional way is adjusting the optical axis to a suitable angle with the thread axis to acquire the real thread form projection, which has some problems, such as time consuming, high skill of operator, high-precision equipment for adjustment, inaccuracy, and so on. Hence, a new method through digital image calibration is presented. The results of relevant simulation indicated the feasibility of this new method, which improves thread measurement and detection accuracy.
CPC and SMPS Systems of Monitoring Airborne Nanoparticles-Theory and Experiment
Authors: Chiu Yi Jui , Leong Khai Shoon , Chang Luh Maan
Published: September 2011

The purpose of this paper is to assess technologies used in the monitoring of nano-particles that are available commercially and under research. The goal of the assessment is to propose a new device based on the technologies assessed. The assessment is performed based on information obtained from literatures review of articles and brochures, and from communications with representatives of the manufacturers of the counters. Two types of nano-particles counters were assessed; counters that are currently commercially available are the condensation particle counter (CPC), the scanning mobility particle spectrometer (SMPS). A description of how each counter works is given, and the advantages and disadvantages are highlighted. Experimental results showed that the performance of capillary had been installed and cleaned. The SMPS mean diameter fell within the range of the NIST standard. The sample offered well distribution in 300 and 400 nm.
Research on Dynamic Characteristic of the Engine Cylinder Based on ANSYS and Pro/E
Authors: Wang Zhen Bing , Fei Peng , Li Guan Zhang
Published: September 2011

The connecting rod is an important part in the engine cylinder. This paper studied the engine cylinder by using Pro/E and ANSYS and achieved some interest results. It used the Pro/E to establish three-dimensional model of the engine and to simulate on it. It also analyzes the connecting rod of cylinder by using the finite element analysis software ANSYS, its modal analysis method was put forward and the low natural frequency and vibration mode were calculated. The analysis method and the results can provide reference for the dynamic design of the connecting rod, and also provide a method for the fault diagnosis engine system.
Research on Intelligent Classification System of Ceramic Tiles Based on Machine Vision
Authors: Li Shi Long , Chen Yao
Published: September 2011

An intelligent classification system of ceramic tiles is introduced in the light of the theory about multi-sensor information fusion. The system includes image acquisition, image processing and intelligent classification of ceramic tiles. The color features and shape features of tile image are synthetically processed using BP neural network. The topological structure of the neural network based on “681” structure is proposed in the system. The numerical calculation and simulation about classification of ceramic tiles is carried out based on MATLAB software. The results show this algorithm is fast and accurate, which can effectively accomplish the classification of comprehensive detection of ceramic tiles.
Stochastic Topology Optimization of Continuum Structure
Authors: Li Jing Kui , Zhang Yi Min
Published: September 2011

By assuming that the random parameters of a continuum structure obey the normal distribution, this paper utilized “normrnd” function in Matlab software to generate pseudo random numbers, analyzed structural stress by using finite element method, conducted topology optimization by using k nearest neighbor (KNN) method, and as such, the continuum structure has been stochastic topology optimized. The paper put forward the concept of “stochastic topology optimization”. Numerical examples are given. The results show that the stochastic topology optimization of continuum structure with random parameters is necessary.
Setting and Calculating the Kinetic Parameters of a Hybrid Excavator’s Working Unit
Authors: Pei Lei , Zhang Wei
Published: September 2011

Working unit in hybrid excavator is an open linkage with three rotary joints, including arm joint, boom joint and bucket joint. This research builds several coordinate systems in the joints, then it sets and calculates the kinetic parameters of working unit by the D-H method, and the result is achieved that relationship between any two parts of hybrid excavator’s working unit can be founded. Based on the result, a kinetic and dynamic model of the energy regeneration system of hybrid excavator can be studied easily.
Shear Strength Prediction of Single Lap Joints Based on Latin Hypercube Method
Authors: Li Long , Hu Ping , Li Wei Dong , Han Xiao Qiang
Published: September 2011

Adhesive bonded single lap joints are used extensively in the manufacture of automobile structures. However, the joints involve many factors such as the overlap, the adherend thickness, the adherend yield strength etc. Therefore, strength prediction is a controversial issue. In order to quantify the effects of various variables, Latin Hypercube method was used to design the tests of simulation in the present study. The failure load predictive equation involving the factors of the overlap, the adherend thickness, the adherend yield strength, the adhesive thickness, the test speed and the adhesive toughness were achieved. The tests of single lap joints in tension load were carried on; while the results form experiments and formula were compared to verify its validation for strength prediction.
A Fuzzy Index Method for Evaluation of Conceptual Design of Assembly Devices
Authors: Yang Wei Rong , Shi Liang , Deng Yi Min
Published: September 2011

Design evaluation is necessary and important for conceptual design because it is often a must for designers to select a design concept from a number of candidates for further development. Assembly devices are usually product specific and there need extensive efforts in developing a feasible conceptual design solution satisfying a number of design constraints. To get a suitable evaluation method for assembly devices in the conceptual design phase, it’s necessary to apply Fuzzy mathematics in the evaluation method and the corresponding algorithm. This paper proposes a fuzzy index evaluation method for the conceptual design of assembly devices, where a number of evaluation indexes specific for assembly devices are proposed and organized into various levels for the evaluation algorithm. Finally, an evaluation software platform is presented, together with a simple design case study to illustrate the application of the proposed evaluation methodology.
Computer Aided Design on Crank Linkage of the Engine
Authors: Yang Rui Jun
Published: September 2011

Because of its excellent power and economy in fuel, diesel is widely applied in recently years. Engine manufacturers are facing increasingly severe emission standards due to environmental concerns and desire for more efficient conversion from chemical energy to mechanical power. The crank linkage is one of the most important components of engine. It endures complex and various impact loads and it is the key point and difficulty of the engine design. The traditional design and analyze methods are so simple that they can not be satisfied with the actual demands, but the development of the reverse engineering and modeling software make possible that the response of crank linkage can be analyzed precisely. This paper has researched the combustion process in IC engine using the technology of computer simulation. Numerical modeling and experiment have been carried out on the diesel engine.
Modeling of Machining Force Error in Aspheric Surface Polishing by Hybrid Movement/Force Control Policy
Authors: Wang Gang Ming , Zhan Jian Ming
Published: September 2011

By the hybrid movement/force control policy, machining force could be controlled in aspheric surface polishing. However, the controller could not eliminate and restrain the errors of position and pose which would disturb the force controll consequentially in real system. In this paper, an angle is defined to express all the errors of position and pose for aspheric surface polishing, and the errors are modeled for machining force controll. By detecting this angle, the errors of position and pose could be used by the system controller to eliminate the disturbance in hybrid movement/force controll system and compensate feed movement controll in aspheric surface polishing. Simulation shows that the model could effectively express the errors of position and pose .
A Calibration Method of Binocular Vision in Laser Remanufacturing Robot
Authors: Zhang Yao Wu , Yang Xi Chen
Published: September 2011

As an advanced repair technology, the laser remanufacturing technology has been paid much more attentions recently. The authors previously studied the vision calibration by using the Matlab Calibration toolbox. Since the boundaries of a single image have to be specified manually, however, the Matlab toolbox based calibration method will be time consuming and low precision. This article continues the study of vision calibration for laser remanufacturing machine system and proposes a new binocular vision calibration method based on Halcon10.0 software. Experimental results show that the proposed calibration process consumes shorter time and is able to achieve higher precision.
Study on Balance and Optimization of Knitted Costume Sewing Assembly Line
Authors: Wang Wei Wei
Published: September 2011

Many Chinese knitted production enterprises are still adopting the traditional management model, making them face more and more problems in quality and productivity. This paper presents a method to balance and optimize the product line by using industrial engineering technique so as to promote production efficiency. The proposed method has been applied to the optimization of the assembly line of a knitted costume enterprise. The results show that the balance rate of the assembly line has been improved from 65% to 88% and the daily output capacity has been promoted from 738 pieces to 1116 pieces.
Computer Simulation for the Milling Process of Cement Concrete in Pavement Planer
Authors: Zhou Li Qun , Li Yu Ping , Wang Zhen , Liu Ya
Published: September 2011

So as to design the pavement planer, it is necessary to study the milling performance of cement concrete. In this work, a coupled thermo-mechanical plane-strain large deformation milling finite element simulation is presented to analyze the cement concrete milling process and predict the stress and temperature field. A model for actual cutter and milling cylinder is set up. Chip separation is considered by applying shear fracture failure criteria and element deletion and adaptive mesh technique. Two contact pairs are defined. Contact pair 1 defines the milling path, and contact pair 2 defines to prevent the formed chip enter into the milling cylinder. The cutter surface friction and heat conduction are considered. The computation indicates that the maximal equivalent stress reaches 1.4MPa and maximal equivalent strain reaches 1.1 in the pavement, and maximal cutter temperature reaches 729°C. Improving suggestions are put forward.
Fault Localization of CNC Software Based on Searching in Divided Execution Trace
Authors: Ma Ming Yang , Wang Yi Qiang , Luo Wei , Zhang Er Hu , Fu Chao , Wang Li Xue
Published: September 2011

In the proceeding of the CNC system, it is a valuable subject that how to locate the fault based on the function of the CNC system. To solve this problem, the method of searching in divided execution trace was introduced into the fault localization of the CNC system. This method divided the execution trace into two segments, searching the statements continually. At the same time, the Fuzzy Arithmetic was used to calculate the suspiciousness of the statements executed by these traces. After the integrated analysis, we could locate the faulty statements of the program. The experiment results indicated that this method was effective in locating the fault of the CNC system software.
Cutting Performance and Engineering Technology for High Speed Machining of Diamond Coating Cutters
Authors: Zhong Qi Mao
Published: September 2011

The performance and wear mechanisms of Al-14%Si is analyzed for diamond coating cutters, the key engineering for effective machining of diamond coating cutters are put forward, practical bases of effective and rapid machining is provided for intractable metals as nonferrous metals or aluminium alloy. The cutting tools and programmed optimization of cutting speeds and feeds are analyzed. This paper summarised the key technology and application in high-speed NC manufacturing, and put forward some problems that should be taken care of in the high-speed NC manufacturing. It obtains good result in practical applications.
Experimental Investigation of Strengthening and Polishing Aeroengine Blades
Authors: Zeng Guo Ying , Zhao Deng Feng
Published: September 2011

The three-dimensional vibratory strengthening and polishing technology was used to strengthen and polish aeroengine blades with complicated surfaces. At first, the principle of the strengthening and polishing process was introduced, which combined strengthening process with polishing process. Then, the technological parameters influenced on the surface quality were investigated. The principal variables were the media hardness, the frequency and amplitude of the vibration, and duration of the vibratory strengthening and polishing. The optimum parameters were obtained. Experimental results revealed that, after strengthening and polishing, the surface roughness of aeroengine blades was reduced from Ra0.35-0.5μm to Ra0.1-0.12μm, and fatigue strength was increased by approximately 50%.
A New Modular Coaxial Feeder Nozzle in Laser Cladding
Authors: Wang Fei , Yang Xi Chen
Published: September 2011

The powder feeder head is studied, which is one of the key to laser cladding. In view of many coaxial nozzles that are used nowadays, we have found that while cladding is doing, most of the nozzles have poor affect on powder-gathering. So as have researched on the theoretical and experiments, we designed a new coaxial nozzle, which has a great affect on powder-gathering, and can be modular disassembled. We have researched on powder stream theoretically, shot the morphology of powder stream by using high-resolution CCD camera, and analyzed the parameters of powder stream. And this new coaxial nozzle has been used in laser cladding experiments.
Special Software for Laser Molten Pool Temperature Field Based on LabVIEW
Authors: Liu Zheng , Yang Xi Chen , Wang Fei , Zhang Yao Wu
Published: September 2011

Special software for laser molten pool temperature field based on LabVIEW was developed．Thermal radiation image of laser molten pool temperature taken by CCD were processed by the special software. It was shown that the software had a visual interface and the laser molten pool temperature field could be measured at real-time and the whole system is simple and efficiency. The software is easy to operate and can measure the laser molten pool temperature field quickly and exactly.
Effect of the Load Path on Formability of T-Shaped Tube Hydroforming
Authors: Liu Wen , Li Ji Qiang , Chen Bin Bin , Jia Zhi Xin
Published: September 2011

Based on the analysis of now available evaluation indexes to estimate the formability of T-shaped tube hydroforming, an aggregative indicator is proposed. The effect of load path on the formability of T-shaped tube is discussed by FEM simulation, and validity of the evaluation index and simulations are proved by experiment. Results show that with the broken line load path of 0-35-35-60, the value of aggregative indicator is the greatest and the formability is the best. The optional parameters are testified by experiment and the results are in agreement with the FEM simulation results.
Numerical Simulation of the Viscous Flow around High-Speed Ship Hull Considering the Free Surface
Authors: Hu Wei Hua
Published: September 2011

Over the last decade, considering the influence of the viscous free water surface, the numerical simulation of the flow around the hull is one of the focuses in ship research. Currently, the precision of numerical simulation results need to be enhanced. In this paper, Computational Fluid Dynamics (CFD) method is used, for a real high-speed ship model, to simulate the flow around the hull and to calculate the total hull resistance with FLUENT software. The Volume of Fraction (VOF) method of two-phase fluid is used to deal with the free surface tracking. The results of resistance are compared with the ship model experimental results. It is shown that the total resistance results calculated accord with the experimental results well, and the numerical method can simulate the profile of the ship wave-making.
Performance Prediction Research of Small Diameter Cold-Rolled Reinforced Bar Based on GA
Authors: Xing Bang Sheng , Du Chang Long , Wang Ning Ning
Published: September 2011

Performance prediction of small diameter cold-rolled reinforced bar using the genetic algorithm was proposed. A mathematical model about the relationship between the parameters, which were tensile strength of small diameter cold-rolled steel rebar product and raw materials’ tensile strength, reduction of area, speed of cold-rolling and coefficient of extension, was built. The appropriate genetic parameters were determined and the data optimization of small diameter cold-rolled steel rebar’s main technological parameters was calculated. According to the optimized parameters to predict and test its performance, the experiment results are basically similar to the predicted results, and this proves that the method is effective introduction.
Precision Force Measurement Using the Levitation Mass Method (LMM)
Authors: Fujii Yusaku , Takita Akihiro , Kaewkhao Jakrapong , Djamal Mitra , Yamaguchi Takao
Published: September 2011

This paper reviews the present status and future prospects of the levitation mass method (LMM), which is a precision mechanical measurement method. The LMM has been proposed and improved by the author for 10 years. The force generated by the actuator is measured as the inertial force of the mass levitated with sufficiently small friction using an aerostatic linear bearing and connected to the moving part of the actuator. During the measurement, the Doppler shift frequency of the laser beam reflected by the mass is measured with a high accuracy with the help of an optical interferometer. Subsequently, the velocity, position, acceleration, and inertial force of the mass are calculated using based on this frequency. Simultaneously, the current and voltage supplied to the actuator are measured.
Research on a Novel Indoor Localization Method for Mobile Robot
Authors: Luo Yuan , Kong Wei Xi , Zhang Yi , Wei Ti Wei
Published: September 2011

In this paper, a novel indoor localization method for mobile robot working in complex environment is presented. Natural features are obtained from 3D rebuilding image sequences. The geometrical relationship between the natural feature points and the homologous points of current view are found to locate the positions of a moving robot. Experiment result shows that this novel localization method is reliable and effective.
Super-Resolution Analysis on Molten Pool Image of Metal Active-Gas Welding Based on Wavelet with Fractal
Authors: Dai Guang Zhi , Han Guo Qiang , Dong Chao Yi
Published: September 2011

According to the unique advantages in image processing combining wavelet and fractal and the different ways of combination, a super-resolution image processing methods are proposed. The methods are characterized by combining the wavelet transform, Wavelet Image Interpolation and FBM Fractal Image interpolation in a certain way to achieve super-resolution image reconstruction. Through processing MAG welding pool images polluted by noises seriously, the results show that: the method proposed in this paper, compared with the method based on wavelet bilinear interpolation, not only effectively raises MAG welding image resolution, but also PSNR of reconstruction images are enhanced 21.1049 dB.
Design and Analysis of Dual-Beam Heterodyne Interferometer
Authors: Ju Ai Song , Zhang Yun Bo , Hou Wen Mei
Published: September 2011

A dual-beam heterodyne interferometer is designed in this paper. Unlike the Zeeman-effect laser, the two frequencies are generated by two acousto-optic modulators. The different frequency beams are spatial separated, but the optical path comply the principle of common path. Nonlinearity in this system is analyzed in this paper. The periodic nonlinearity error caused by non-ideal laser source is not existed in this system. The stability of this system is tested.
Research on Edge Detection of Thin Sheet Part Dimension Inspection System Based on Machine Vision
Authors: Wu Ji Gang , He Kuan Fang , Qin Bin
Published: September 2011

Aiming at the edge detection of thin sheet part dimension inspection system based on machine vision, a contrast research on edge detection is investigated. The Gaussian blurred simulation image and thin sheet part image are took as evaluation images, and the edge detection are done with Roberts operator, Sobel operator, Prewitt operator, Kirsch operator, Laplacian operator, LOG operator and mathematical morphology edge detection method. The results of edge detection are analyzed deeply, and the edge location accuracy, noise resisting ability and calculation time of each algorithm are compared. The single-pixel width connected contour is acquired with mathematical morphology edge detection method, the detection time are 0.0521 second and 0.457 second respectively. It is appropriate that taking the mathematical morphology edge detection method as the edge detection method of thin sheet part dimension inspection system based on machine vision.
Remote Status Monitoring and Fault Diagnosis for Manufacturing System
Authors: Zan Tao , Wang Min , Hu Jian Zhong , Liu Xiao
Published: September 2011

This paper introduces a novel approach for mechanical manufacturing system to implement status monitoring and fault diagnosis. The embedded hardware and software framework for terminal device is discussed to ensure high performance, high reliability, high expansibility, low power and small volume. According to the demand of remote status monitoring, the strategy of data transmission and information sharing is applied to provide the analyzing and diagnosing service based on intranet/internet. The artificial intelligent technique is used for information fusion and fault diagnosis of manufacturing system. The proposed approach shows great potential for improving overall production efficiency, while reducing the cost of maintenance.
A Method Based on Data in Application of Distributed Control System Modeling
Authors: Guan Hong Wei , Li Yuan , Li Ying Dao , Li Shuo
Published: September 2011

This paper introduces a modeling method of distributed control system, which is based on data. A subspace which can represent the key feature of the ensemble of data by extracting the eigenfunctions from the data will be founded. The Galerkin method will be applied to compute the coefficient of corresponding to the eigenfunctions and then the corresponding algorithm is also designed. The process of heat conduction in a metal bar is analysed with this kind of method. The results show the method well implementes modeling for distributed control system.
The Simulation of Adaptive Fuzzy PID Control System on the New Test Power Source System of Small Locomotive
Authors: Cheng Zheng Mei , Guo Xiao Ding , Chen Xiao Ke , Deng Jing Xin
Published: September 2011

The voltage stability of test power source system about small locomotive is poor, and the response speed is slow. The theory of adaptive fuzzy PID control used in the small locomotive test power source system was proposed. The design of adaptive fuzzy PID controller and the effect of simulation were detail described. The control effect of adaptive fuzzy PID control and the traditional PID control is compared. The application value of adaptive fuzzy PID control on small locomotive test power source system has been proved.
Novel Method for ELISA Traces Pipetting System by Air Displacement Pipetting
Authors: Zhu Lian Qing , Li Hong , Na Yun Xiao , Guo Yang Kuan , Dong Ming Li
Published: September 2011

In the Enzyme-linked immunosorbent assay (ELISA) test, many steps need traces pipetting. The ELISA test results will be different when we use different pipetting ways. Our traces pipetting system is based on the air displacement pipetting principle, comparable to the functioning of hand pipettes. It is applied pressure sensor to realize pressure-based liquid level detection (pLLD) and aspiration monitoring. The monitored system can distinguish the following situations: (1) a correct aspiration; (2) cup empty; (3) tip-blocked; (4) bubbles. Using the air displacement principle into traces pipetting can avoid contamination or dilution by system liquids, and problems with corroded tubing, pumps, etc. It applied pressure sensor to realize pLLD and aspiration monitoring. The results of the real-time monitor module on air displacement pipetting show that the traces pipetting system can agilely distinguish the different liquid pipetting situations. The method of air displacement pipetting offered an effective way for ELISA traces pipetting system.
O-Shape Board Topological Optimal Design in the Thickness Measurement System
Authors: Yang Shu Yi , Liang Hong Qiang , Hou Guo Qing , Zhu Ping Yu
Published: September 2011

O-shape board finite element modal in the thickness measurement system is established based on ANSYS. O-shape board topological optimal design is accomplished with reducing the volume ratio for constraint condition and the minimum flexibility of the overall structure for objective. The improved structure of O-shape board is analyzed again. Under the circumstances to meet the actual needs, the optimized structure weight is reduced and manufacture cost is decreased. O-shape board structure lightweight design is achieved. The result indicates that the proposed optimization design method is feasible.
Displacement Sensor with Controlled Measuring Force and its Characteristics Analysis
Authors: Yang Liang En , Wang Xuan Ze , Zheng Lin
Published: September 2011

A displacement sensor with controlled measuring force and its characteristics analysis are discussed in this paper. The displacement sensor consists of an electric induction transducer with high resolution and a voice coil motor (VCM). The measuring principles, structure of the sensor are discussed. Theory model, dynamic and static characteristics of VCM are analysed. A measuring system for surface topography with large measuring range is constructed based on the displacement sensor and 2D moving platform. Measuring force of the sensor in measurement process of surface topography can be controlled at μN level and hardly changes. It has been used in measurement of bearing ball，bullet mark, etc.
Application Study on a Detecting Tube for Deformation Settlement Monitoring for Earth Dike Based on Distributed Optical Fiber Sensors
Authors: Zhu Ping Yu , Lei Hua , Leng Yuan Bao
Published: September 2011

A monitoring structure has been designed to detect settlement using a tube with distributed optical fiber sensors inside. The strain of the optical fibers inside the detecting tube was calculated to estimate the settlement degree of earth dam. The Finite Element Method (FEM) analysis of the tube interaction with the earth dam by ANSYS software is applied to find the best installation location of the detecting tube.
Application of Data Visualization and Numerical Analysis for Evaluating Propagation of Uncertainty
Authors: Bian Xin , Zhou Xin , Fang Hong , Liu Ke , Gan Xiao Chuan , Zhao Hai Ning , An Ying
Published: September 2011

Propagation of uncertainty is a key factor in uncertainty evaluation. We propose a method using data visualization and numerical analysis for evaluating propagation of uncertainty. In this paper, the main stages of the method are described. Then, the implementation of the method in linear and nonlinear model is illustrated through some examples. These examples show appropriate use of data visualization and numerical analysis can be helpful to provide a concise qualitative overview and accurate quantitative analysis for the uncertainty.