bluuebunny/crossref_metadata_2025 huggingface dataset:
The Mechanism of Quasi-Dynamic Expansion Method and the Design of the Equipment for Manufacturing Biaxial Oriented PVC Pipes
Authors: Song Guang Jun , Wu Da Ming , Liu Ying , Jiang Hui , Zhang Xin
Published: December 2012

Biaxial oriented PVC (PVC-O) pipes have great advanced properties: high intensity, high impact resistance, material saving etc. The new product can be used in many situations. There are more than three effect methods for manufacturing PVC-O pipes in foreign countries. Relevant researches have been preceded in some domestic institutes, but there are no effect processing methods and productive technologies have been reported. Based on plastics bulge forming and hop-pocket method, the quasi-dynamic continual expansion method (QDCE) is proposed in the paper. The key point of QDCE takes advantage of high elasticity、high compression ratio and high tear resistance of elastomeric materials, meanwhile designs production equipment and processing technology for manufacturing PVC-O pipes. We explore the mechanism of QDCE and design a whole package of expanding equipment.
Numerical Investigation of Thermal Flow Field of Air-Cooled Condensers for Yongshou Plant
Authors: Yan Wen Zhou , Zhao Wan Li , Li Qiu Yan
Published: December 2012

By using the computational fluid dynamics code, FLUENT, Numerically simulation is investigated for Youngshou power plant. Under the constant ambient temperature, the effects of different wind speed and wind direction on the thermal flow field are qualitatively considered. It was found that when considering about the existing and normally operating power plants, the thermal flow field is more sensitive to wind direction and wind speed. Based on the above results, three improved measures such as: increasing the wind-wall height and accelerating the rotational speed of the fans near the edge of the ACC platform and lengthen or widen the platform are developed to effectively improving the thermal flow field, and enhanced the heat dispersal of ACC.
The Simulation Research on Assembly Deformation of Internal Combustion Engine Cylinder Liner
Authors: Wu Bo , Hu Ding Yun , Wang Xu Lan
Published: December 2012

For the commonly used wet cylinder liner assembly characteristics and structure of water-cooled internal combustion engine, the influencing factors of wet cylinder liner deformation in the assembly conditions are calculated and analyzed using finite element method. Mainly from the matching stiffness of block-cylinder liner-gasket-cylinder head assembly, the local stiffness of the cylinder head, cylinder head bolt preload and the structure form of cylinder liner, get the influence laws of the various factors on the cylinder liner radial deformation and its each order Fourier series deformation, which provides guidance direction to control the cylinder liner deformation under assembly loading.
Reconstruction of Real Rough Surface Based on Fractal and the Study on Bolt Assemble Technique
Authors: Wang Wei , Tang Qiang , Xu Xiao Dong , Gong Shui Qing , Liu Xiao Peng
Published: December 2012

Aiming at the importance of the microcosmic topography of connecting surface and bolt assembling technique to the bolt connection performance, the fractal characteristic of bolt joint rough surface is studied based on the power spectrum of its micro surface profile. Fractal models of 2D and 3D rough surfaces are presented by W-M function and the 2D and 3D bolt joint rough surfaces are reconstructed. Imageware and Pro/e are used to build the bolt connecting model based on the real rough surface presented by W-M function. The preload is imitated by the PREST179 element. The finite element transient analysis is used to imitate the speed and force size of the bolt tightening. The relationship model between tighten speed, preload size and connecting performance whose target is contact stress is presented based on the finite element analysis results. According the model, the single bolt precise assembling technique is obtained.
Laboratory Experimental Research on Basic Characteristics of Back Pressure Jet Pump
Authors: Xu Jian Ning , Lv Wen Jie , Zhu Duan Yin , Gao Yan Xiong
Published: December 2012

Jet pump has different basic characteristics when it is used in different working condition. According to the model of jet pump unloading system used in the oilfield, the lab experiment use high pressure pump to provide high power liquid and suction liquid, and also making use of throttle valve providing back pressure condition, to simulate the condition of oil well unloading system much better. The experiment tests pressure and flow of power liquid, suction liquid and mixture liquid , and achieve the basic characteristic curve of jet pump. The result show that according to the different application conditions, can change the jet pump efficient working area range when needed, by adjusting the distance between nozzle and throat, and the optimal distance is the diameter of nozzle 2~3 times.
Fatigue Crack Growth Prediction of Elliptical Corner Crack Using 3D FEM
Authors: Gozin M.H. , Aghaie-Khafri M.
Published: December 2012

Plasticity induced crack closure (PICC) simulation using finite element analyses has been concerned by many researchers. In the present investigation elliptical corner fatigue crack growth from a hole was predicted using PICC method. An elastic-plastic finite element model is built with a suitably refined mesh and time-dependent remote tractions are applied to simulate cyclic loading. In a 3D geometry the crack opening value will vary along the crack front. For simplicity this shape evolution is neglected and the crack front is extended uniformly. Predicted fatigue life using crack closure method for elliptical corner crack is in good agreement with the experimental data. The results obtained highlighted the sensitivity of crack closure method to the opening stress intensity values.
Vibration Isolation Characteristics of Euler Strut Spring Used in Low Frequency Vibration Isolation System
Authors: Zhang Guan Jun , Zhu Xiang , Xu Ran , Li Tian Yun
Published: December 2012

Recently, the Euler strut is used as the supporting spring in the low frequency isolation. An Euler spring is a column or strut of steel material which is compressed elastically beyond its buckling load, which makes the ratio of the isolated mass to the mass of the supporting spring maximum, and greatly increasing the internal resonant frequencies of the isolator. In this research, the unique mechanical properties and the expressions of the displacement transmissibility of the Euler strut are deduced. The influences of structural parameters of the strut on the stiffness and vibration isolation characteristics are investigated in detail. The results show that the Euler strut has the potential in low frequency vibration isolation, and the length and breadth of the strut can influence the stiffness, transmissibility and critical loading mass respectively.
The Proposal of Function in Smart Home for Handicapped Users
Authors: Hamernik Peter , Tanuska Pavol , Mudroncik Dusan
Published: December 2012

Nowadays are smart homes aimed at healthy users. Much less emphasis is placed on the handicapped users. The article is focused on classification of function in a smart home for users with Alzheimer’s disease associated with dementia.
3D Roughness Parameters as Factors in Determining the Evolution of Effective Stress Concentration Factors in Fatigue Processes
Authors: Mereuta Valentin , Buciumeanu Mihaela , Palaghian Liviu
Published: December 2012

The influence of machined surface roughness on the fatigue life of S355JR steel has been investigated. The specimen have been machined with three roughness levels and tested under plane fatigue. The surface roughness parameters were used to estimate the effective stress concentration factors Kt using the Arola-Ramulu model and Neuber model. In this paper it is proposed a modification for both models. Based on the experimental results was obtained the evolution of the effective stress concentration factor for the original Arola-Ramulu and Neuber models and also for the modified ones.
The Study of Simulation and Optimization on Car Ride Comfort
Authors: Zhao Guang Yao , Zhao Yi Feng , Li Xue Jiao
Published: December 2012

Based on the ADMAS software environment, the study designed a simulation model of the whole car virtual prototype for a certain type of car; then random road was created, and the movements and forces of the car in different working conditions were simulated; the originally designed type of car was simulated for its ride comfort evaluation. Then through the analysis of sensitivity, the important factors influencing the whole car ride comfort were found. In order to improve the whole car ride comfort, the suspension spring stiffness and shock-absorbing damper of the original design were optimized, which effectively improved the riding comfort of this type of car. The paper aims at improving the designing method of car ride comfort.
Researches on New Fault Diagnosis Method for Process Industry Based on Improved SVM Reduction Algorithm
Authors: Wang An Na , Sha Mo , Liu Li Mei , Chu Mao Xiang
Published: December 2012

Once faults happened in the process industry, it will bring on heavy casualties and fatal property losses, even lead to irreclaimable pollution. Combining the large-scale sample set reduction strategy with SVM, this paper proposed a new improved support vector machine (SVM) training algorithm based on support vectors to solve the difficulty of fault diagnosis of process industry. A new reduction algorithm is presented to reduce large-scale sample set. The constraint threshold is introduced in the new algorithm. The new training algorithm can eliminate the samples correspond to non-support vectors so that poor generation ability caused by large-scale training sample set is solved. A new evaluating indicator of large-scale sample set reduction strategy is also proposed in this paper. The improved SVM algorithm proposed is applied to two typical fault diagnosis of process industry. The results of experiments show that the improved SVM algorithm not only reduces greatly the cost of SVM learning but also markedly increases the speed of classification, and at one time the accuracy of fault diagnosis is not debased.
An Approach to Optimization of Takagi-Sugeno Type Fuzzy Regulator Parameters by Genetic Algorithm from Mamdani Regulation Surface
Authors: Kocian Jiri , Ozana Stepan , Koziorek Jiri
Published: December 2012

Many scientific papers deals with the usage of fuzzy rules to implement PID control. Fuzzy models, especially the Takagi-Sugeno-type, have received significant attention from various fields of interest. It is very often very difficult to determine all the parameters of the Takagi-Sugeno-type controller. In this paper we present optimization of Takagi-Sugeno-type fuzzy regulator parameters by genetic algorithm. Implementation of universal fuzzy P/PS/PD function block implemented to the PLC Simatic S7 300/400 is introduced. Mamdani model is used as comparative model. Parameters of Takagi-Sugeno-type fuzzy regulator are determined by genetic algorithm optimization from comparative regulation surface.
The Application and Research of the Fuzzy PID Control in the Afterheat Recovery System of Temperature Constant and Frequency Variable
Authors: Tan Xiao Dong , Li Tang Qing , Liu Chen Bao , Zheng Ke De
Published: December 2012

In the afterheat recovery process, the heat pump has high request to the heat-source water’s temperature stability. This article uses the method of temperature constant and frequency variable to guarantee the stability of heat-source water. However, the afterheat recovery system is a dynamic engineering system and the parameters of normal PID can not real-time tuning, it has bad Control effect. Therefore, this article combines fuzzy control and PID control to get a fuzzy PID controller with its parameters can be tuned to improve the adaptation ability for the time-varying of parameters. And we use it to improve the performance of steady and dynamic states for the controlled object. Modeling and simulating to the system by the Simulink and the fuzzy toolbox in the MATLAB and examining the control effect of the system.
Optimal Motion Planning of Spot Welding Robot Applications
Authors: Trnka Kamil , Božek Pavol
Published: December 2012

This paper discusses the problem of effective motion planning for industrial robots. The first part dealt with current method for off-line motion planning. In the second part the presented work is done by one of the simulation systems with automatic trajectory generation and off-line programming capability. A spot welding process is involved. The practical application of this step strongly depends on the method for robot path optimization with high accuracy, thus transform the path into a time and energy optimal robot program for the real world, which is discussed in the third step.
Interfacial Microstructure of Diffusion-Bonded and Annealed Cu-10Fe/Al6061 Clad Material
Authors: Jin Ju Young , Hong Sun Ig
Published: December 2012

Diffusion bonding between the Cu-10%Fe and Al6061 alloys were successfully achieved at various temperatures (450-525°C) in the argon atmosphere. The bonding interface regions were analyzed using scanning electron microscopy and energy dispersive spectrometry and XRD. The presence of Fe particles in Cu was found to have an influence on the kinetics of intermetallic compound layer formation. Cu-Fe/Al 6061 exhibited the slower growth rate of intermetallic layers than Cu/Al 6061 after diffusion bonding. The movement of Cu-Fe/Cu9Al4 interface into Cu-Fe substrate appears to be hindered by the presence of populated Fe-containing particles and filaments. In addition to Cu9Al4, CuAl and CuAl2 intermetallic layers, Al7Cu2Fe and unreacted Fe were observed to be present in the intermetallic layers. The intermetallic layers which are close to Cu such as Cu9Al4 and CuAl were observed to be harder in Cu-10%Fe/Al 6061 than in Cu/Al 6061, suggesting Fe and its intermetallics have some strengthening effect on Cu9Al4 and CuAl.
Technology of Active Anti-Galloping on Over-Head Transmission Lines
Authors: Yang Xin Long , Guo Chong Xiao , Guo Ze Rong , Jiao Yong He
Published: December 2012

The over-head transmission lines will gallop because of the natural conditions, which will cause serious incidents. In order to avoid the galloping of the over-head transmission and improve the effect of transmission system, some analyses are done about the formation mechanism of transmission lines galloping and the current anti-galloping devices. On the basis of the reactive mechanism of swing, the active anti-galloping mechanism is presented. Besides, the mathematical model of the anti-galloping system is raised. With the theoretical calculation and numerical simulation for the conductor which is equipped with active anti-galloping device, the result is feasible. The paper introduces the structure of active anti-galloping, which lays the theoretical and practical basis on the realization of anti-galloping.
Simulation Research of Blasting Vibration Prediction with Cylindrical Dynamite
Authors: Yang Guo Liang , Yang Ren Shu , Huo Chuan , Che Yu Long
Published: December 2012

Blasting vibration not only damages architectural structures but also harms people heath. Numerical simulation provides an effective method to study explosion and shock problems. Herein, the paper performed numerical simulation to predict blasting vibration. At first, analyzed the propagation velocity of stress wave, which validated the feasibility of the model. The simulation and test agreed well both at vibration waveform and at the order of magnitude of both nodes 1 and 2. The simulation could provide reasonable accuracy. The achievement provided reference for other researches.
Research on Modal Parameters Identification of Wing Structures with NExT-ERA
Authors: Guo Ying Nan , Wan Fang Yi
Published: December 2012

To the aircraft structures system, there are lots of factors which will lead to the inevitable performance degradation or faults, such as the corrosion of the external environment, the fatigue causing by the varying loads, degradation of material properties and so on. Based on the monitoring parameters of the structures, Structural Health Monitoring (SHM) technique can comprehensively assess the status of the structure and its damage. All results of SHM are useful to extend the structural life, reduce maintenance costs and improve the safety and reliability of the structure. In this paper, taking a wing structure as example, the acceleration responses under the natural excitation can be obtained. With NExT-ERA method, the modal parameters of the wing structure can be calculated. Comparing with the finite element results, the numerical results of NExT-ERA method can be proved that they are credible and accurate. All the results indicate that, without destroying the structure situation, the NExT- ERA method can accurately identify the wing structure modal parameters.
A Practical Method to Calculate Elasto-Plastic J-Integral
Authors: Li Yu He , Bai Xin Li , Zhao Ya Wei
Published: December 2012

For Ramberg-Osgood elasto-plastic material, under the premise that integration path is limited through the Gaussian integration points, the finite element expressions of the J- integral were deduced in detail. Using the method of coordinate transformation, integration was conducted through the plane rs of the shell element local coordinate system rst (t for shell element thickness direction). The integration points on mid-surface of the shell element were considered. Thus the finite element expressions of the J- integral can be applied to shell elements, the J- integral calculation problem of the shell structure with crack can be solved. A lot of standard sample results comparisons show that the calculation precision of the method proposed in this paper meet the requirements of engineering. Finally, the J- integral of a pressure vessel (a cylindrical shell with a hole and unilateral axial crack) was calculated. The obtained results are recognized by a pressure vessel research institution and referenced in the design. In the conventional finite element calculation, users can, at the same time, obtain the J- integral of the component with crack. So the method in the paper has strong practicability and high engineering application value.
Study on Wavelet Denoising of Pulse Impact Force of Non-Viscosity Debris Flow
Authors: Chen Hong Kai , He Xiao Ying , Tang Hong Mei , Tang Lan
Published: December 2012

Noise filtering of impact load spectrum is the key to ensure the impact load of debris flow during the control engineering design of debris flow. As the laboratory impacting test indicates, noise effect in pulse impact force spectrum can be denoised using Daubechie(dbN)and Symlet(symN)wavelet methods, both of which contain hard threshold method and soft threshold method. Analyzed the pulse impact force of non-viscosity debris flow testing results by wavelet denoising method, the testing conditions are A-3(whose grain size is range from 0.3cm to 0.8cm), B-3(whose grain size is range from 0.8cm to 1.5cm) and C-3(whose grain size is range from 1.5cm to 3.0cm),all of whose solid phase ratio are 0.16.The analyzing results show that the denosing effect adopting Db5 wavelet function is superior to ones adopting Sym2 wavelet function, meanwhile, the denosing effect adopting hard threshold method is superior to ones adopting soft threshold method. The results also indicate that the bigger the solid phase ratio is, the bigger the Signal Noise Ratio is, the better the wavelet denosing effect is. These results could provide scientific basis for further accurate experimental study to ensure impact load of non-viscosity debris flow.
Monitoring and Analysis of Blasting Vibration of Diversion Tunnel Excavation in Layered Rock Mass
Authors: Deng Hua Feng , Zhu Min , Wang Le Hua , Zhou Ji Fang
Published: December 2012

In order to insure the safety and stability of the existed dam body and dam curtain during the diversion tunnel excavation, the vibration velocities were analyzed based on in-site blasting vibration monitoring. Result shows that the elevation difference between explosion point and monitoring points has a great impact on the vibration velocity in addition to single fire dynamite and blast center distance. During data analysis, the traditional empirical formula of attenuation of blasting earthquake must be amended. Through contrasting and analyzing, the amended formula of attenuation of blasting earthquake wave is precise relatively. At the same time, two collapses during the diversion tunnel excavation were analyzed based on the characteristics of layered rock mass and fault distribution, and the explosion parameters were optimized, so that the damage effect of blasting vibration was controlled effectively. This research also takes a good effect in other similar works.
Experimental Investigation about Dynamic Bond-Slip between Reinforcing Steel Bar and Concrete
Authors: Yao Wei , Wu Hai Jun , Huang Feng Lei
Published: December 2012

The aim of the present research is to assess the dynamic performance of bond-slip between reinforcing steel bar and concrete. Precisely, the sensitivity of the bond stress-displacement relationship in the interface between reinforcing steel bar and concrete to strain rate is investigated. In this paper, the reinforcing steel bar/concrete specimens were tested in dynamic push-out experiments with modified split Hopkinson pressure bar (SHPB) system. The incident bar was used to apply compressive loading to single steel bar embedded in a surrounding concrete. Using this technique, the debonding progress was analyzed. Besides, the effect of loading rate and effective depth on the push-out tests was studied with the impact velocities in the range of 9 m/s - 29 m/s. It is seen that maximum push-out force increases with increasing loading rate. In addition, the dynamic interface bond force does not proportionally increase with the effective depth of steel bar.
Smoke Transport Calculation during a Wooden Residential Structure Fire
Authors: Lin Cherng Shing , Yu Chia Chun , Chen Te Chi , Bui Gracie
Published: December 2012

This is a case study of cottage housing in Taiwanese military dependents’ villages that are primarily wooden structures with brick walls. When a fire ignited in one of these structures, sufficient air on the exterior of the building promoted the rapid ignition of the wooden structure. Because residents were a woman and child who lacked fire safety and escape knowledge, the fire resulted in two deaths. When fires ignite in wooden structures, toxic particulates in the smoke generated from the burning and decomposition spread rapidly because of thermal buoyancy effect, causing difficulties for escape and rescue. This research utilizes the fire dynamics simulator (FDS) software to simulate the fire scenario to discuss the impacts of smoke diffusion at a fire site and analyze the main causes of the fire. We also provide suggestions in the hope of offering information on fire safety precautions for this structure type to prevent future similar disasters.
Real-Time Detection of Adhesion Coefficient between Tire and Road
Authors: Wang Kui Yang , Tang Jin Hua , Li Guo Qing , Yuan Chuan Yi
Published: December 2012

Adhesion coefficient between tire and road is one of important factors which influence vehicle safety performance. On the basis of theoretical analysis, the detection method of adhesion coefficient based on brake-by-wire is put forward. Brake force is estimated according to pedal position sensor, vehicle braking deceleration is detected through MMA6260Q acceleration sensor. Motion state of tire is distinguished according to brake force and road braking force, vertical load of tire is received in view of formula on vehicle load transfer. Adhesion coefficient used for sliding area is got and taken as adhesion coefficient of road. Analysis shows that the detection method may identify adhesion coefficient between tire and road accurately, and has certain practical value.
Construction of Hazardous Waste Management
Authors: Zhang Hai Ying , Ma Guo Xian
Published: December 2012

Hazardous Waste Management is a special course offered to students whose major is Environmental Engineering. It is offered to let students know basic knowledge and technologies of hazardous waste (HW) processing and disposal, so that they can solve problems on HW processing and disposal. With increasing development of processing and synthesis of substances, lots of hazardous waste is generated as side-products. As more importance was attached on environment, requirement on hazardous waste management is more stringent than ever before. In order to enhance the competitiveness of undergraduates in using English, it is necessary to develop this course as a bilingual course. This paper first analyzes the basic conditions of this course. Then it proposes a developing plan for the course from the following aspects: adjustment of the course, reorganization of the textbook, teaching method, teaching mode, test database and exercise database and ways to increase teaching quality of this course.
Automatic Integration of System-Level Design and System Optimization Based on SysML
Authors: Liu Yu Sheng , Yuan Wen Qiang
Published: December 2012

Model based systems engineering (MBSE) is becoming a promising approach for the system-level design of complex mechatronics. And several MBSE tools are developed to conduct system modeling. However, the system design cannot be optimized in current MBSE tools. In this study, an approach is presented to conduct the task. A set of optimization stereotype is defined at first which is used to formalize the optimization model based on the system design model. Then the design parameters and their relationships applied optimization stereotypes are extracted and transferred to construct the tool-dependent optimization model. Finally, the optimization model is solved and the results are given back and then modify the corresponding system model automatically. In this paper, MagicDraw is used to model the whole system whereas Matlab optimizer is used for optimization. The combustion engine is chosen as the example to illustrate the proposed approach.
The EKF Senorless Control Strategy of Permanent Magnet Synchronous Motor Adaptive Backstepping Control System
Authors: Ji Yang
Published: December 2012

For the unsatisfactory of the traditional linear control methods, on the basis of the mathematical model of PMSM, a combination of backstepping control method based on the Lyapunov function and adaptive control method is used in the speed control system of PMSM. A method of estimating the rotor position and speed based in extended Kalman filter (EKF) for PMSM is proposed. A simulation model of PMSM using the designed adaptive backstepping controller with EKF is built. The results of simulation using the control method show the preferably dynamic and stable-static performance of the system, and prove its effectiveness.
Joint Source and Relay Optimization of Multiuser MIMO Relay System
Authors: Chen Fang Ni , Wang Zhong Peng
Published: December 2012

In this paper, we design the source precoding matrix and the relay amplifying matrix of a multiuser multiple-input multiple-output (MIMO) non-regenerative relay system. Different from the other algorithms, we first introduce a new model with new unknown but to be designed variables. Then we proposed an iterative algorithm to get the source precoding matrix and the relay amplifying matrix to optimize the system performance. The simulation results show that the proposed design algorithms can improve mean square error (MSE) performance.
Typical Product Cases Guided Engineering Graphics Teaching Reform for Communication Engineering Major
Authors: Zheng Tai Xiong
Published: December 2012

In order to cultivate the students with the engineer quality, the typical product cases guided engineering graphics teaching reform for communication engineering major is performed. The content of the course is decomposed into four parts and merged into product. Student-led, teacher-guide classroom atmosphere is established and task guided examination method is carried out. Results show that the new teaching reform is welcome and good effect is achieved.
The Forecasting of the Development of Home Automation
Authors: Chuang Feng Kuang , Hung Chih Young , Kao Hector Kun Ming
Published: December 2012

As technology grows, the automation technologies integrated into the realm we live, and it continuously to provide people more comfortable and efficient environment. This study systematically applies the TRIZ theory to find out the problems in home automation development. We use contradiction matrix and 76 standard solutions provided by TRIZ to filter out the possible development of these home automation issues in the future. In this research, we conclude the factors of home automation technologies as follows: (1) the efficiency of operating environment; (2) the installation and maintenance of Internet; (3) the security and privacy of Internet. After analyzing through the directions of TRIZ innovation principles and standard solutions, this study proposes the development trend of each sub-problem.
Research and Realize of High Availability in Femto Communication System
Authors: Shi Zhi Yuan , Xu Bin , Huang Lian Fen
Published: December 2012

With the continuous development of 3G networks, Femto has gotten more and more attention and development, as a kind of access technology in cellular base station,it improves indoor coverage、cell capacity and relieve network pressure of outdoor macro base station. But how to ensure the efficient and uninterrupted in communication network is a problem which we currently facing. This paper will solve this problem using HA (High Availability) technology, when the computer system or network hardware or software fail, it can switch to the backup system by the switch-over technology to achieve uninterrupted service and maintenance system availability.
Research on the Method for Intelligent Autonomous Vehicle to Distinguish the Road in Virtual Traffic Environment
Authors: Yang Nan Yue
Published: December 2012

This paper studied how to build the intelligent autonomous vehicle in driving simulation system and let it distinguish the traffic road in virtual traffic environment based on Eon Studio. The method of using the database to store the information of virtual traffic roads was proposed. The result illustrated that by this means the intelligent autonomous vehicle could distinguish the complex traffic network accurately in the virtual traffic environment, which enhanced responsivity and stability of the driving simulation system and created a more realistic driving environment for users.
Embedded Micro Inertial Navigation System
Authors: Daniec Krzysztof , Jędrasiak Karol , Koteras Roman , Nawrat Aleksander
Published: December 2012

This paper presents Embedded Inertial Navigation System designed and manufactured by the Department of Automatic Control and Robotics in Silesian University of Technology, Gliwice, Poland. Designed system is currently one of the smallest in the world. Within it there is implemented INS-GPS loosely coupled data fusion algorithm and point-to-point navigation algorithm. Both the algorithms and the constructed hardware were tested using two unmanned ground vehicles varying in size. Acquired results of those successful tests are presented.
Development of Tool Inquiry System Based on Embedded RFID Middleware
Authors: Ren Nai Fei , Li Yang , Zhang Jun , Wang Xiu Jie
Published: December 2012

This paper introduced a new technology to design an embedded tool inquiry system with RFID and Wi-Fi. It can realize instant tool inquiries and modification through IIS Server and RDA to operate the database. With such method, it can easily manage tool information timely and realize the automatic management of tools. Meanwhile it also can realize fast and convenient inventory of tool store and information management.
Design of a Multi-Thread Data Collection System
Authors: Hu Shao Zhong
Published: December 2012

This paper proposes an approach that uses serial communication based on the Windows system to collect the manufacturing data through multi-thread mechanism. The data collection system adopts two levels control architecture. The down streaming level is based on several data collection terminals that use ARM chips as central processing units (CPU). The upper level is consisted of personal computers which are connected to the communication network through RS-422, aiming to transfer the data on one side. On the other side, these computers interact with data server, aiming to transmit the data to the processing center. SQL Server 2000 has been utilized as the data manager within this system which uses multi-thread technology to continuously enquiry the data collection terminals (DCTs). After the practical implementation, this system is qualified in the manufacturing environment with high reliability, real-time feature as well as quick responses to the users when they operating the DCTs.
Biomechanical Analysis in Human Masticatory System
Authors: Wang Lin
Published: December 2012

The necessary theoretical and methodological foundation is provided by means of which the human mastication process could be studied and reproduced in a digital dynamic way. This paper reviews previous publications and elaborates further mathematical analysis and mechanical analysis of biomechanical functions, explaining the characteristics of human mandible, Temporomandibular joints (TMJs), muscles based on clinical anatomy, and analysing the inter-relationship and inter-reflection between each component of this multi-body assembled organism.
Combination Method of Kernel Principal Component Analysis and Independent Component Analysis for Process Monitoring
Authors: Xiao Ying Wang , Du Ying
Published: December 2012

A combination method of kernel principal component analysis (KPCA) and independent component analysis (ICA) for process monitoring is proposed. The new method is a two-phase algorithm: whitened KPCA plus ICA. KPCA spheres data and makes the data structure become as linearly separable as possible by virtue of an implicit nonlinear mapping determined by kernel. ICA seeks the projection directions in the KPCA whitened space, making the distribution of the projected data as non-gaussian as possible. The application to the Tennessee Eastman (TE) simulated process indicates that the proposed process monitoring method can effectively capture the nonlinear relationship in process variables. Its performance significantly outperforms monitoring method based on ICA or KPCA.
Design of a LabVIEW System Applied to Predictive Maintenance
Authors: Mathias Mauro Hugo , de Medeiros Everton Coelho , Gonçalves Valdeci Donizete
Published: December 2012

The implementation of vibration analysis techniques based on virtual instrumentation has spread increasingly in the academic and industrial branch, since the use of any software for this type of analysis brings good results at low cost. Among the existing software for programming and creation of virtual instruments, the LabVIEW was chosen for this project. This software has good interface with the method of graphical programming. In this project, it was developed a system of rotating machine condition monitoring. This monitoring system is applied in a test stand, simulating large scale applications, such as in hydroelectric, nuclear and oil exploration companies. It was initially used a test stand, where an instrumentation for data acquisition was inserted, composed of accelerometers and inductive proximity sensors. The data collection system was structured on the basis of an NI 6008 A/D converter of National Instruments. An electronic circuit command was developed through the A/D converter for a remote firing of the test stand. The equipment monitoring is performed through the data collected from the sensors. The vibration signals collected by accelerometers are processed in the time domain and frequency. Also, proximity probes were used for the axis orbit evaluation and an inductive sensor for the rotation and trigger measurement.
Drum Sludge Drying Equipment Energy Dissipation Factor Analysis
Authors: Ma Xiao Lu , Zhang Yong
Published: December 2012

Drum sludge drying equipment is used widely both at home and abroad, and the energy consumption is the key factor of measuring sludge drying equipment. Based on the basis of study of drum sludge drying equipment energy consumption, this paper conducts a comprehensive analysis of drum sludge drying equipment energy consumption factor, and points out that the drum sludge drying equipment energy consumption mainly depends on heat source and drying system configuration, aims to provide reference and research for drum sludge drying equipment.
Interstellar Autonomous Navigation System Using X-Ray Pulsar and Stellar Angle Measurement
Authors: Wang Yi Di , Sun Jun Feng , Zheng Wei
Published: December 2012

In order to improve the performance of interstellar autonomous navigation system, an interstellar autonomous navigation system using X-ray pulsar and stellar angle measurement is proposed. In this system, an X-ray detector, which is fixed on a gimbaled axis, is adopted. The detector can point at the different X-ray pulsars that are visible. By augmenting the clock error and the clock drift error as a component of the spacecraft state, the proposed system can correct the clock error of the atomic clock onboard. Furthermore, the observability of the corresponding system is investigated, and the result shows that the system is completely observable at most of time. The proposed system can provide an improved performance than traditional version of celestial navigation system (CNS). Through consequentially measure the difference pulsars, the proposed system can have a satisfactory performance. The proposed navigation system provides a prospective way for the realization of the deep space autonomous navigation system.
Wireless Gas Detector System Using Microcontrollers, PLC and SCADA System for Monitoring Environmental Pollution
Authors: Morsi Iman , Mostafa Mohamed Mansour Mohamed
Published: December 2012

Gas identification represents a big challenge for improving detection and pattern recognition of each gas by using inexpensive gas sensor. This paper presents a gas detector system which is built to monitor, and measure gas pollutant emissions in the air and also used to detect different gases. The pollutants are ethane (C2H6) and methane (CH4) which are located beside the fertilizer factories in Alexandria Egypt and some other gases as hydrogen (H2), propane (C3H8) and isobutane (C4H10).The gas sensors TGS-2611, TGS-816, TGS-2620 and TGS-823 from Figaro Engineering Inc. are used to build agas detector system and it is located in the site of measurements. The data of each sensor is transmitted and received wirelessly using XBee module (DigiXBee 802.15.4) and microcontroller PIC 18F4620. The system is controlled and monitored by using programmable logic controllerPLC Step 7-200 from Siemens and Supervisory Control and Data Acquisition SCADA systems respectively. The principal component analysis PCA method is applied for clustering and distinguishing among different gases. The results indicate thatmethane can be detected using TGS-2611 better than other sensors.Isobutane can be detected by using TGS-2620 and TGS-2611 better than others. Propane can be detected by using TGS-816 and TGS-823 better than others. Hydrogen can be detected using TGS-2620, TGS-816 and TGS-823 better than others
Quantifying Fractal Dynamics of Metallogenic Systems with Detrended Fluctuation Analysis
Authors: Wan Li , Chen Peng , Gong Zhao Xian
Published: December 2012

In this paper, we analysed fractional dynamics behavior in metallogenic elements grade series, using detrended fluctuation analysis (DFA), with the objective to explore and understand the underlying dynamic mechanism. Our results show that the metallogenic elements grade series are the scale invariance and the long-range correlation. As in the case of element grade dynamics, the DFA scaling exponents can be used to discriminate mineral intensity.
Dynamic Responses of Vehicle-Track-Foundation System under Axial Loads
Authors: Zhu H.L. , Yu Li Feng , Yuan E.N. , Wang X.
Published: December 2012

Considering the effect of axial loads in the rail, this study presents a hybrid approach to investigate the dynamic responses of vehicle-track-foundation system. In this model, the vehicle is taken as a multi-rigid-body subsystem, and the ballastless track is simulated as Euler beam supported by two-layer elastic foundation. The coupled dynamic equations of system with axial loads are derived based on D’Alembert’s and Hamilton’s principles. The proposed methodology is validated through the real example to be numerically analyzed. The results show that the tensile force in rail is tending to have the amplitude of vibration decrease, and the compress force would bring the amplitude of vibration going up. So a rational axial loading is necessary to suppress the vibration of vehicle-track-foundation system when the car moving at a high speed.
Effects of Repair Weld on Residual Stress Distributions in Offshore Pipelines
Authors: Zeinoddini M. , Arnavaz S. , Hoseini S.A.
Published: December 2012

Subjects related to strength and durability of structures such as oil and gas transmission pipelines areof great importance. Considering the special characteristics of these structures including their construction and harsh working environment, they are especially prone to different types of damages. Repair welding is a viable optiontomitigatesuch damages and for restoration of the strength and resistance of these structures. In this paper, anumerical coupled thermo-mechanical finite element modelling approachis conducted tosimulatethewelding and the repair welding process. The results of the studyshow that repair weldsmay wellhave adverseeffects on the residual stress magnitudeand on its distribution. This might in turnpotentially put the integrity of the pipeline at risk.
Study on the Method of Crack Detection of Steel Rods Based on Modal Analysis
Authors: Sun Hong Chun , Deng Yue Cheng , You Yuan Cheng
Published: December 2012

Steel rods are widely used in the areas of petroleum, chemical, architecture and transportation, steel rods with cracks will cause terrible accident and great losses when working in production practice. In view of traditional Non-destructive Testing (NDT) method can only realize static detection, this paper provide the method based on modal calculate analysis, including the choice of damage index and the judgment of damage degree and damage location for cracks of steel rods. The damage location is judged by the strain mode shape difference curve and the function expression of damage degrees and mutation degrees of curvature mode shapes is acquired by the method of least square fitting, which can achieve quantitative analysis of single crack of steel rods, this provide theoretical support and technical reference for experimental modal analysis and dynamic NDT.
Bottom Dead Center Repeat Precision of High-Speed Press Measurement
Authors: Zheng Xiang , Wang Jun Ling , Yao Jing Lin
Published: December 2012

Bottom dead center repeat precision is the key evaluation standard of high-speed press, it’s an important index to judge production level and technical level. Use model RM-7201 testing apparatus to measure bottom dead center of high-speed press at different conditions, find out laws according to the test result. These findings may helpful in proving correctness of bottom dead center precision analysis and to control the B.D.C precision of the high-speed press. Provide practical guidance basis to improve the press structure and bottom dead center precision.
Innovation of the Advanced Actuator
Authors: Zou Chang Ping , Feng Jian Qiong
Published: December 2012

Actuator is a kind of swaying mechanism whose power source is the hydraulic pressure oil, which may be widely applied to varied occasions where need swaying mechanisms, such as aircraft, tank, ship, train, etc. An aircraft needed a most advanced actuator which can produce torque up to 28kg•m with its unit weight, and set strict demands on such indexes as weight, dimension. According to existing plan, an actuator was designed and manufactured, being far inferior to requirement, which adopted a complex gear train composed of 2K-H and 3K planetary reductors. On the basis of analyzing existing dozens of reductors, a new structure that achieves swaying with multi-start ball guide screw driven by reciprocating piston rod of high-pressure oil cylinder was put forward. Having analyzed and compared more than ten new type of plans, a structural model of straight-rotary ball pair was proposed, an ideal plan of identical radius ball-return was found, a new spatial tight ball-return curve was designed, and the optimal design of the advanced actuator was finished. Computer simulation and prototype experiment made clear that each index of the advanced actuator could satisfy the aircraft’s demand.
Study on Inversions of the Offset Planetary Train with Bevel Gears
Authors: Zou Chang Ping , Feng Jian Qiong
Published: December 2012

Three inversions of the offset planetary train with bevel gears were studied.On the basis of kinematic analysis, the calculation method of efficiencies and train ratios of these transmissions were obtained.
Green NC Transformation of Lathe C6132 Based on the Green Manufacturing Process
Authors: Fu Yan Hong , Zhang Rong Yi , Xu Ying
Published: December 2012

The basic concept and main content of the green manufacturing and green manufacturing process are reviewed in this paper. And Green NC Transformation of Lathe C6132 is given based on the basic idea of the green transformation, according to requirements of the green design system.
Data-Driven Based Gas Path Fault Diagnosis for Turbo-Shaft Engine
Authors: Lu Feng , Zhu Tie Bin , Lv Yi Qiu
Published: December 2012

In order to improve diagnostic accuracy and reduce the rate of misdiagnosis to the aircraft engine gas path faulty, the methods based on data-driven and information fusion are developed and analyzed. BP neural network (NN) and RBF neural network based on data-driven single gas path fault diagnosis method is introduced firstly. Design gas path performance estimators and the fault type classification for turbo-shaft engine. Then the gas path fused diagnostic structure based on D-S evidence theory and least squares support vector machine are developed. Comparisons of the turbo-shaft engine gas path fault diagnosis verify the feasibility and effectiveness of the gas path fault diagnosis based on information fusion.
The Study of Electromagnetic Slip Clutch Application in Step Less Speed Regulation of Small Cars
Authors: Bai Ri Xin , Zhu Jie , Dong Jun Gang , Chen Shu Chun
Published: December 2012

For the current situation of automatic transmission technology which applied to small cars, it proposes a concept that electromagnetic slip clutch achieves step less speed regulation of small cars, describes its technical principle and feasibility, analysis the mechanical properties of electromagnetic slip clutch, at sometimes, the article proposes mathematical modeling technology for the electronic control system of electromagnetic slip clutch, and structures software and hardware design platform with C and 32 microcontroller. Finally, it confirms the research value of electromagnetic slip clutch for the step less speed regulation of small cars.