bluuebunny/crossref_metadata_2025 huggingface dataset:
A Monocular Vision Measurement Algorithm Based on the Underwater Robot
Authors: Liu Tao , Wan Lei , Liang Xing Wei
Published: February 2014

A monocular vision measurement system was proposed based on the underwater robot, which used a single camera as visual sensor and used inertial navigation system to measure position and attitude. In this paper, the processing of underwater target images and the parameter calibration algorithm for visual measurement system were discussed, and then the visual measurement mathematic model of underwater robot was derived using the pose information of the inertial navigation system. Vision measuring principle validation tests for underwater robot have been carried out to detect underwater targets. The experiments verify that the monocular vision measurement algorithm proposed for underwater robot is effective with a preferably accuracy.
Research and Development of an Embedded Security Network Card Based on AM 1808
Authors: Qin Hao Hua , Hao Wu Sheng , Shao Wei
Published: February 2014

In this paper, a design scheme is proposed of security network card based on AM 1808 for an embedded system. In the card, embedded firewall, network security device, hard-disk protection and restoration, encryption machine and other network security products are integrated. According to practical needs, the function of embedded security network card is extended and reduced.
Design of General ATS Software Platform Based on Components
Authors: Guo Su Min , Xu Ke Bao , Su Chun Jian , Liu Yan Fang
Published: February 2014

Generality is an important direction for Automatic Test System (ATS) ,while general software platform is the key technology to realize general ATS. Object-oriented programming design ideas and hierarchical and modular structure of the program have been adopted ,achieving the separation of data processing and testing processes; "Software backplane + Component" general software architecture has been used to achieve "the stability of the core layer, general, component layer configurable, scalable"; non-coding type of test program development way is used to achieve the development of test programs assembled . In order to make the hardware resource management centralized in the testing system, test resource management server is designed on the platform, which can put the hardware and software resources into service to achieve the equipments transferring. The results provide that the software platform can improve the development efficiency of test program and also maintenance costs are reduced.
Application of Parallel Mechanism in Multi-DIM Vibration Absorbers
Authors: Yu Chang Chun
Published: February 2014

It introduces ways and means of designing this kind of vibration absorbers which are presented using parallel mechanisms as the main mechanisms ,it ,which takes the parallel mechanisms with 3-DOF translation as an example, validates the feasibility of the method, and enumerates some of the parallel mechanisms that are fit for multi-DIM vibration absorber. In a word, the multi-DIM vibration absorber system based on parallel mechanism is a new idea and breakthrough in multi-DIM vibration absorption field, which has the characteristic of simple structure, compact mechanism, high accuracy, partially or fully decoupled mechanism easy for control and so on, and provides a new method for the study of Multi-DIM vibration.
CAE Simulation Study on Thermal Stress of Butterfly Valve and Actuator
Authors: Tian Xiao Bo , Yang Jin Tang , Meng Dan
Published: February 2014

To the valve system in the furnace hot air duct of the hot-rolled furnace in steel, the thermal Stress of butterfly valve and actuator was simulated by ANSYS. The feasibility of appropriate temperature control measures of too high temperature of butterfly valve and actuator was verified. And in the field, the transformation and the temperature measurement of butterfly valve and actuator were performed; the failure rate was calculated, to ensure that butterfly valve and actuator could meet the requirements of hot rolling.
Corrosion Prevention in Boilers by Using Energy Audit Consideration
Authors: Amir Mokhtari Karchegani , Samad Maboudi , Behzad Shehni Meidani , Mehdi Satari Manesh
Published: February 2014

Marun's petrochemical boilers after four years was auditing by a team consist of different experts. Result of that audit was showing over design consuming of excess air and fuel which it cause low efficiency of working that evaluated by a program in excel application. For next step by using Fluent &Gambit software, boiler analyzed and it appeared that some of primary rows of boiler bank tubes caused overheating and after report, because of exceed requirement of steam for operation, boilers operated without stopping. So after short period some of boiler tubes ruptured and this failure continued until were decided to repair and replace overheated tubes with new ones and by calibrated and changed instrument logic, correction control loops, excess air set and it caused better efficiency, decrease polluted environment gas, prevention of corrosion in tubes, decrease fuel consumption and turning off one of boilers by receiving high efficiency of others boiler. So by using designed excel program for boiler process, condition monitoring perform monthly.
Effects of Flexural Stiffness, Axial Velocity and Internal Support Locations on Translating Beam’s Natural Frequencies
Authors: Köstekci Ferid
Published: February 2014

The aim of this paper is to examine the natural frequencies of beams for different flexural stiffness, internal simple support locations and axial moving speed. In the present investigation, the linear transverse vibrations of an axially translating beam are considered based on Euler-Bernoulli model. The beam is passing through two frictionless guides and has an internal simple support between the guides. The governing differential equations of motion are derived using Hamiltons Principle for two regions of the beam. The method of multiple scales is employed to obtain approximate analytical solution. Some numerical calculations are conducted to present the effects of flexural rigidity, mean translating speed and different internal support locations on natural frequencies.
Herringbone Gear Meshing Force Simulation Based on UG and ADAMS
Authors: Li Ke
Published: February 2014

Modeling and assembling of a herringbone gear were undertaken by using UG. Meshing characteristics of herringbone gears assembly model under static state were concluded through the ANSYS Workbench software. Simulation analysis on the herringbone gear meshing force was conducted to verify the gear design rationality.
Simulation of Dynamic Crack Propagation under Quasistatic Loading
Authors: Kazarinov Nikita , Bratov Vladimir , Petrov Yuri V.
Published: February 2014

Simulation of dynamic crack growth under quasistatic loading was performed using finite element method with embedded incubation time fracture criterion [. Experimental data, used for comparison was taken from [. ANSYS finite element software package was used in order to receive FEM solutions. The fracture criterion was implemented as an external procedure written in C++. The developed model is not using and trimming parameters. Only initial experimental conditions and material properties measured in separate experiments are used. Received dependencies for crack velocities as a function of time closely follow those observed in experiments by J.Finberg. Simulation results provide a possibility to conclude that the incubation time approach is an effective method to predict fracture initiation as well as crack propagation at various loading rates. Dependencies of an instant crack velocity on the current level of stress intensity factor received in this work for quasistatic loads and in [ for high-rate loads is discussed and compared to those experimentally observed by K. Ravi-Chandar and W.G. Knauss [ and J. Finberg [.
Simulation Study on High-Powered Shaped Charge Warhead Penetrating into Target with Water Layer
Authors: Xing Shi Long , Huang Xiang Ke
Published: February 2014

A kind of tapered and spherical combined liner shaped charge warhead is researched, and the damage mechanism is analyzed. The physics modle of warhead to columniform hull target is build, numerical simulation is done. The result shows that the shaped charge jet formed by this structure can provide movement space, which is in favor of damaging target with water layer.
Solitary Wave and Periodic Wave Solutions and Chaotic Behaviors in a (2+1)-Dimensional Nonlinear System
Authors: Zhu Xiao Xin , Ma Song Hua , Ren Qing Bao
Published: February 2014

With the help of the symbolic computation system Maple and an improved mapping method and a variable separation method, a series of new exact solutions (including solitary wave solutions and periodic wave solutions) to the (2+1)-dimensional general Nizhnik-Novikov-Veselov (GNNV) system is derived. Based on the derived solitary wave solution, we obtain some chaotic patterns.
Study of the Solitoff Solution and Fractal Solution for the (2+1)-Dimensional Broek-Kaup System with Variable Coefficients
Authors: Zhu Wei Ting
Published: February 2014

Starting from a (G'/G)-expansion method and a variable separation method, a new family of exact solutions of the (2+1)-dimensional Broek-Kaup system with variable coefficients(VCBK) is obtained. Based on the derived solitary wave solution, we obtain some special localized excitations such as solitoff solutions and fractal solutions.
The Research of Lean Combustion Characteristic of Compound Injection System of Direct Injection Engine
Authors: Mou Jiang Feng , Chen Rui Qing , Lu Yi Wei
Published: February 2014

This paper studies the lean burn limit characteristic of the compound injection system of the direct-injection gasoline engine. The low pressure nozzle on the intake manifold can achieve quality homogeneous lean mixture, and the direct injection in the cylinder can realized the dense mixture gas near the spark plug. By adjusting the two injection timing and injection quantity, and a strong intake tumble flow with special shaped combustion chamber, it can produces the reverse tumble to form different hierarchical levels of mixed gas in the cylinder. Experimental results show: the compound combustion system to the original direct-injection engine lean burn limit raise 1.8-2.5 AFR unit.
Design and Optimization on the Steel Rope Automatic Tensioning Device of Mine Elevator
Authors: Mao Guang Feng , Cao Guo Hua , Pan Ji Song , Fu Bei Bei
Published: February 2014

In this paper, one Automatic Tensioning Device which can realize multi-time tensioning is designed. Through structural designing and motion designing to get the main structure, through initially calculating to get its each part parameters, through ANSYS optimization designing to get its minimum size parameters of each device under the strength conditions, to achieve its goal to optimize the quality of the lightest. Main components of Automatic Tensioning Device are selected as the research object, establishing the optimal equation, using the optimization module of Goal Driven Optimization of ANSYS to optimize its size. The results show that with the strength requirement contented, Automatic Tensioning Device can be optimized by optimizing the Wall Panel.
Lightweight Design of Outer Wing Based on Importance Evaluation Factor
Authors: Zhang Da Qian , Zhu Ze Peng , Tan Xiao Dong
Published: February 2014

The static and dynamic performance index is constraint condition to establish the mathematical model for optimization design of wing. Basically,the analysis of weighted sensitivity of objective function and state variable imports an importance evaluation factor of wing lightweight design to determine the optimization design variables, then using finite element software , with a optimization design module, to carry out a optimization design. As a result, the analysis of the outer wing shows that the premise of the maximum stress, maximum displacement and low modal frequency are better meet the operating requirements, which the wing weight cumulative reduce to 4.02%. Simultaneously, it proves the efficient and effective of such method.
Topology Optimization of QY70G Truck Crane Turntable Structure
Authors: Fei Ye , Wang Xing Kun , Liu Wen Min
Published: February 2014

Turntable is the main bearing component of truck crane, its structural-load-carrying capacity influences the operational capability directly. This paper adopts the HyperWorks software to make topology optimization for the turntable structure of QY70G truck crane, and carry out the finite element analysis and comparison for the models before and after optimization, which provides an effective method to improve the turntable structure of truck crane. Turntable is one of the important components of truck crane，it bears hoist boom、lifting、luffing mechanism and bob-weight and so on, it is the transfer center of truck crane when it works, the structure will directly affect the lifting performance of the machine. But, the rotary table structure design is affected by the vehicle shape size and installation and space layout. The traditional design method is based the experience of analogy to check by finite element software, it is difficult to get the design scheme which meets the requirements given above and own better strength and stiffness, it also have the disadvantages of long design cycle and large workload. This article is based on the finite element method and structural topology optimal idea, by means of HyperWorks-OptiStruct, makes finite element analysis for the turntable structure of certain QY70G truck crane, and carries on the structural topology in the condition of setted installation location and space, in order to obtain the ideal design plan.
Discussions of Influence of some Factors on New Vehicle Absorption Cold Source
Authors: Qiao Hai Jun , Wu Jia Nan
Published: February 2014

Small absorption cold source for car air conditioners differs from the compression cold source characteristics of the cold source, such as vehicle shaking can cause problems such as pollution of coolant water. Based on computational fluid dynamics (CFD) method, spray process in a new small cold source of lithium bromide absorption chiller was simulated by using the k-epsilon model and volume of fraction (VOF) model, which can capture the free surface of the two phase of liquid and gas, and the effects of nozzle profile and car bumping are analyzed, providing a theoretical basis for the application of a small absorption cold source for automotive.
Study on the Optimum Angle for Solar Collector
Authors: Liu Li Jun , Dai Zhong Hua , Li Xiao Qing
Published: February 2014

To increase the efficiency of solar energy, a method for setting the collector was established, which can enhance the solar thermal power in winter. The optimum angles of the quasi-fixed solar collector and fixed solar collector were calculated. For Daqing area, their values were given, the angle is 4945.51for quasi-fixed solar collector and it is 5355.97 for fixed solar collector. Comparing the quasi-fixed solar collector with fixed solar collector in Daqing area, the better choice is the quasi-fixed solar collector.
Stress Fields and Energy Analysis during the Fracture of Composite Materials
Authors: Hamli Benzahar Hamid , Chabaat Mohamed
Published: February 2014

The present study evaluates stress fields, the stress intensity factor and energy release rates at the time of the cracking in a composite material. Our problems are formulated using two materials having different parameters such as the shearing modulus and the Poissons ratio. After having determined the displacement and stress fields, one homogenized the latter in order to allow comparing the results with those of other researchers. During the propagation of the main crack, the surrounding dislocation induces two effects: amplification effect which increases the stress at the main crack-tip and a shielding effect which reduces the propagation of the main crack. Finally, Energy Release Rates (ERR) associated to the different transformation inside the damage zone is evaluated on the basis of the superposition of all energies: the energy due to the main crack, the energy due to the existing dislocation and the energy due to the interaction.
Tensile Strength Characteristic of Al6061-T6 and Al7003-T6 Aluminum by the Change in the Friction Welding Process Variable
Authors: Kim Hyun Sik , Hong Dong Pyo , Yang Sung Mo , Kang Hee Yong
Published: February 2014

Recently, the various welding methods are used in the coupling method of product for the streamlining of complex products, simplification of manufacturing process, and decreasing process time a variety of industries. In this welding area, the friction welding technique has many advantages such as the mass production of rapid and highly reliable product and eases of automation, reduction of process time etc. so the domestic/external many studies are conducting. In this study, the Spindle speed, Up-set pressure as the necessary process variables for friction welding were change variously by using the round bar specimen of Al6061-T6 and Al7003-T6 Aluminum material, so the friction welding performance of the specimen by each change was compared and analyzed. In order to comprehend the friction welding performance, the frictional pressure was fixed with 20MPa, the spindle velocity was changed with 1,000, 1,500, 2,200rpm, and the Up-set pressure was changed with 35, 50, 65MPa for producing, so the performance by the specimen was compared and analyzed through the final tensile strength test. In addition, the effects of the friction welding on the specimen were examined through the analysis on the welding part hardness of the each friction welded aluminum specimen. In the result of the study, it showed the highest welding characteristic with the tensile strength 250.5MPa by applying 1,000rpm spindle velocity, 50MPa Up-set pressure compared to the lowest tensile strength 171.6MPa. In addition, as the result of hardness test, the hardness of specimen after conducting the friction welding of specimen decreased compared to the hardness of the pure material in the welding boundary, so it is judged that the measure to minimize the effects of the frictional heat by minimizing the friction welding time is needed.
Investigation of Spring-Back and Spring-Go of AISI 400 S Sheet Metal in "V" Bending Dies Depending on Bending Angle and Punch Radius
Authors: Özdin Kamil , Büyük Emrah , Abdalov Firuz , Bayram Hüsamettin , Çini Ahmet
Published: February 2014

The components made of steel sheet metal very important in todays industry. In order to be useful, those parts must comply with the design tolerances, such as shape, position and dimensions. The largest problem with the parts bended by using dies is the springing, because it violates the manufacturing tolerances. Therefore, it is vital to know a parts springback and springgo properties in advance, which is mainly dependent on the properties of the sheet metal and bending conditions.In this study, 0.9 mm AISI 400 S steel sheet metal was bended using V dies (30°, 45°and 60°) and punches (2 mm, 4 mm and 6 mm). After being removed from the bending dies,springback rates of the specimens were measured by using optical goniometer. With respect to the bending angles and punch radii, springback and springgo properties of the specimens were recorded by using a spreadsheet software and some figures are obtained.
Study on Effects of Ultrasonic Vibration on Grinding Force
Authors: Zhang Hong Li , Zhang Jin Huan
Published: February 2014

The mathematical models of the dynamic grinding force and the average grinding force were established by introducing the unit grinding force Fu. And the formula of the average grinding force in the grinding zone was derived. The experiments were conducted in the traditional grinding (TG) mode and tangential ultrasonic vibration grinding (TUAG) mode. The results show that the unit grinding force in TUAG is lower than that in TG in the same machining condition; the grinding force ratio is decreased due to the tangential ultrasonic vibration of the workpiece. It is helpful to improve the machinablity of the hard-brittle material.
Arc Fault Detection Device and its Development Trend
Authors: Pang Jing , Feng Wei Chen , Liu Qing Rui
Published: February 2014

Arc-fault is an important cause for fire.In order to ensure safety utilization of electric power, more attention should be paid to designing and using arc-fault detecting instruments. The article is an analysis of arc fault and its causes. By analyzing the current signal, discover its characteristics. Through analysis the characteristic, it was found that wavelet transformation is good for analyzing the current signals. An arc fault detection was designed based on wavelet transformation. At last, analysis of the arc fault detection development in China.
A Modulation Method of PWM Pulse with Dead-Time Based on MCU
Authors: Sun Bao Jiang , Zhang Chao
Published: February 2014

By analyzing the working mechanism of timer of MCS-51 and waveform characteristics of the PWM pulse with dead-time, and proposed a new method of simultaneous control of two channels with dead-time PWM signal based on a single timer of MCS-51. This paper provided the programming idea and theoretical analysis, and this method has the advantages of simple structure, less occupied internal resources of the MCU, fast response, wide duty cycle range, waveform stabilization. By providing the driving signal for the experiment of drive circuit board DA962A4 for FF400R12KS4 type IGBT module, the validity and practicality of this method were examined.
Study on Hazard Evaluation of Smart Grid Based on Credibility Entropy Evaluation Model
Authors: Li Yong Jie , Xu Jing Zhe , Li Zhi Zhan , Liu Wen Ge
Published: February 2014

With the development of smart grid construction enter the substantive stage, the security problems in operation has been paid to more and more great attention .To the possible sources of danger in the operation of smart grid, the paper has proposed the evaluation index system of hazard source, raised the concept of risk degree and its measurement methods. Based on the credibility theory, the paper also proposed the credibility entropy weight coefficient evaluation model, then made the analysis of hazard smart grid from both the frequency of occurrence and the degree of influence with the actual situation. thus under the corresponding confidence interval , estimated the risk level of smart grid which basing on the credibility entropy weight coefficient evaluation model. Finally, through the analysis of cases, verified the science and feasibility of the credibility entropy weight coefficient evaluation model.
Research on Resource Allocation Evaluation of Service-Oriented Manufacturing Enterprise Based on DEA
Authors: Xu Xuan Guo , Gao Song , Ma Chao
Published: February 2014

Abstract: Service-oriented manufacturing is a new manufacture mode. In order to solve the problem of resource allocation evaluation of service-oriented manufacturing enterprise, a Data Envelopment Analysis(DEA) mathematical model based on cost-benefit was constructed in this approach. The resource allocation evaluation problem was mapped to the cost-benefit analysis problem by using DEA, considering the characteristics of the service-oriented manufacturing mode, taking enterprise T as the example to analysis self-supporting allocation cost and cost-benefit value of service-oriented manufacturing enterprises to verify the applicability of the model. Finally, according to the recent five years’ situation of enterprise T, the optimization strategy of resource allocation was given.
Modeling and Control for a Small UAV Helicopter
Authors: Liu Peng , Liu Sheng Dong , Zhao Zhneg , Liu Jia Qi
Published: February 2014

A frequency identification modeling method for a small UAV helicopter and its control system design is presented. A modified frequency identification method for a state-space model of helicopter is presented. The overall concept is to extract a complete set of non-parametric input-to-output frequency responses that fully characterizes the coupled helicopter dynamics, conduct a nonlinear search based on secant method for a linear state-space model that matches the frequency-response data set. The accuracy of the identified model is verified by flight experiments. A path following controller is presented for an unmanned helicopter with two-loop control frame. The outer-loop is used to obtain the expected attitude angles through reference path and speed with guidance-based path following control, and the inner-loop is used to control the attitude angles of helicopter tracking the expected ones with loop shaping method. Finally, an 8 trajectory tracking simulation is conducted to illustrate the efficiency of the proposed control method.
Dynamics Simulation of Large Tower Structure Lifting Process Based on CABLE Modeling
Authors: Zhang Hong Zhi , Sheng Xuan Yu
Published: February 2014

In this paper, three-dimensional model of the flexible steel wire rope was established by using CABLE software in CATIA software. After defining the physical parameters of the steel wire rope, the dynamics analysis model of wire rope was established in motion workbench. Further fully model was assembled and simulated including cranes, tower, ground in motion workbench. Finally, we obtained hoisting structure of the trajectory curve, dynamic response, eccentric structure, flipping, etc., as well as interference with the surrounding objects.
Influence of Wave Passage Effect on Seismic Response of Truss String Structure Co-Working with its Base Frame
Authors: Wang He Peng , Xu Zhong Gen , Deng Chang Gen
Published: February 2014

By inputting two groups of seismic waves with phase differences of 0.16s, 0.34s, 0.5 and 0.34s, 0.66s, 1.0s to column elements divided into four parts of lower story of finite element model with insertion method, this paper analyzed the influence of wave passage effect on seismic responses of truss string structure of Guangzhou Convention and Exhibition Centre co-working with its base frame by time history analysis method. The results show that: because of natural vibration characteristics of structure, wave traveling has some effect on seismic responses of truss string structure of Guangzhou Convention and Exhibition Centre.
A Method to Multi-Sensor Networking for Target Tracking
Authors: Wang Ning , Quan Hong Wei , Xue Xiu Yin
Published: February 2014

The acoustic sensor networking is an important research topic in multi-sensor target tracking system. An acoustic sensor network consists of multiple acoustic sensors which are located in fixed positions with specific deployment mode. It can improve the robustness and fault-tolerance of the target tracking system, especially when a single or few sensors do not work normally with some faults. This paper discusses the acoustic sensor detection model and gives a method to sensor deployment for target detection in target tracking system.
Numerical Simulation of Radar Velocity Tomography Using SIRT and ART
Authors: Du Cui , Xu Xin Jun , Zhang Hao
Published: February 2014

Layer structure is an important reference basis for evaluating quality of land reclamation. Classical methods like digging profiles cost much time and energy. GPR (Ground Penetrating Radar) is a non-destructive and high-efficient technique. Aiming at the problem that insufficient reflected signal energy using traditional reflection method, tomography can be used in GPR detection for layer structure of mine reclamation soil. A model with four layers with different wave velocity is constructed and both ART and SIRT are employed to solve the inversion equations. The results show agreement with model data, and the difference between layers is clear. This verifies radar tomography technology is practical for detection layer structure of mine reclamation soil. The two algorithms give similar results and ART shows better accuracy while SIRT provides more stable results.
Calculation of Diffraction Patterns on inside Cylindrical Surface
Authors: Wang Jun , Hu Yu Hen , Zhou Xin , Li Da Hai , Wang Qiong Hua
Published: February 2014

In this paper, we propose a calculation method of diffraction patterns on inside cylindrical surface. The proposed method applies the Huygens-Fresnel principle and derives the diffraction distributions on the inside observation surface, which are propagated from point light sources on the outside concentric object surface. Although the calculation of diffraction patterns on the outside observation surface has been reported in the literature, that on the inside cylindrical surface is much different, and it has not been reported in the best of our knowledge. The simulation results of Youngs fringe, as the simplest example of our method, and the diffraction patterns on cylindrical observation with cylindrical image demonstrated the validity of the proposed method. Our method is extremely useful in creating cylindrical computer-generated holograms.
The Study on a New Approximate Method of Computing Electromagnetic Scattering from Multilayer Rough Sea Surfaces
Authors: Tian Jia Sheng , Pan Wan , Shi Jian
Published: February 2014

At high sea states strong winds make the sea surface broken, and become a multilayer-rough sea surface made of a large number of foams and droplets. Similarly, if the sea surface covered by oil and other dirts will also belong to the mutilayer rough sea surfaces of various medium properties. In this paper, applying the Kirchhoff Approximation (KA) and the electromagnetic theory of stratified media, electromagnetic scattering characteristics from a multilayer rough medium surface are calculated. Firstly, a detailed analysis of electromagnetic reflection from multilayer parallel interfaces under different incident angles is carried out. Secondly, combining the preceding two results and courses, electromagnetic scattering from the multilayer random rough surfaces is studied. The computed results are in good agreement with those by using the method of moments (MOM) and reported by some experts. Finally, the random rough sea surface covered by spilling oil or droplets and foams is calculated in detail. Compared with MOM, the new approximate analysis method in the paper can avoid a large matrix inversion, and thus greatly reduce the computation time and improve the computational efficiency.
Observer Design for Lipschitz Nonlinear Systems with Output Uncertainty
Authors: Zou Wei , Liu Yu Sheng , Liu Kai
Published: February 2014

This paper presents an observer design for Lipschitz nonlinear systems with output uncertainty. By means of Lyapunov method as well as linear matrix inequality (LMI), the observer gain matrix is determined and a sufficient condition ensuring the asymptotic stability of the observer is proposed. Simulation results demonstrate the robustness of the proposed observer for output uncertainty.
Research and Development of Automatic Control System on Material Split Packing and Packaging Integrated Machine
Authors: Yang Kai , Li Zhong Shen , Zhang Lei
Published: February 2014

In order to meet the high speed, high precision, high reliability of the packaging machine, a novel control system is provided. In the hardware, the main circuits consisted of main processor module, memory module, temperature measurement and control module, input signal detection module, material split packing module, output driver module, human-machine interface module, system monitor module, power module and JTAG debug module, etc. In the software, the multi-tasking operating system μC/OS-Ⅱ and the graphical user interface μC/GUI were successfully transplanted into LPC2478. Then an experimental platform was established. And many control tasks, including automatic measurement, making bags, loading, transferring, pumping vacuum, sealing and data display, were automatically and continuously executed on the platform. Finally the results show: the machine can package 30 packets (5 g per packet) in a minute; the packaging errors ≤ 0.2 g; the packaging qualified rates ≥ 93%. In conclusion, the system performance is good.
Analysis and Research on Modeling Methods of Mems Coupling Dynamic System of Ultrasonic Motor
Authors: Chen Bo , Li Bao Yin
Published: February 2014

The ultrasonic motor is a complex dynamic system, which be divided into an electro-mechanical coupling system and a drive and control system. The core of the electro-mechanical coupling system lies in excitation of elliptical movement of the mass points on the surface of the stator and frictional transfer of the power and the movement. Modeling of the electro-mechanical coupling dynamic system of the ultrasonic motor substantially comprises two aspects. First, the dynamic system is viewed as an integral transfer function, and an intuitive relationship between input of the electric energy and output of the power is established. Second, geometric parameters and material parameters of mechanisms are closely correlated with dynamics of the mechanisms.
Coordinated Control in Agent of Automotive Airbag Roll Device
Authors: Wang Xiao Dong , Guo Zhi Gang , Zhang Wei , Sun Rui
Published: February 2014

Airbags tension as an important part of quality assurance which is produced in the airbag roll debice. In this paper, an adaptive reinforcement learning method ,which is based on Agent ,is used to achieve real-time coordination of two servo motor. The results show that the system has a good dynamic and static characteristics, and which can ensure the constant tension of the airbags and product quality.
A Complete Target Selection Method for ACC System Based on Statistics and Classification of Vehicle Trajectories
Authors: Wu Jian , Geng Shi Feng , Zhao Yang
Published: February 2014

The uncertainty of driving behaviors of all cars and trajectories variation of preceding cars with changing path curvature make it hard for traditional radar-based Adaptive Cruise Control (ACC) system to choose its valid target, which is caused by the deficient judgment about the preceding curves and the behaviors of preceding cars. Through statistics and classification of the trajectories that host and preceding objects generate, the proposed method could differentiate the operating conditions of each car, either in straight lane, on curve or in lane-change, thus front path prediction and host vehicles future lane estimation can be well fulfilled. From radar and host cars information a coordinate that changes under several criteria can be established, based on which the trajectories of all cars can be classified and analyzed. This complete method can find the valid target for ACC system and enable the system to overcome some typical defects of traditional ACC, such as the confusion between lane-change and curve-enter of preceding cars, and also the speed of preceding cars can be modified as soon as they enter curves. HIL test have been conducted to validate the method.
Risk Analysis and Safety Evaluation on Combustion System of Gas-Steam Combined Cycle Power Plant
Authors: Sun Zhong Qiang
Published: February 2014

Under the general policy of the national energy-saving emission reduction and sustainable development, the domestic iron and steel enterprises surge in the by-product gas power generation project. There exist many dangerous and harmful factors in by-product steel gas power generation process and which easily caused casualties and the pollution of the environment. The study on risk analysis and evaluation are still relatively dearth about the by-product gas generating process of domestic steel enterprises. The boiler system on a Combined Cycle Power Plant was analyzed and evaluation by ICI/MOND fire and explosion toxicity index method and the method of fault tree analysis, which combined with the actual situation of steel plant Combined Cycle Power Plant. The results show that the combustion system is more dangerous, and the hazard index levels are reduced to lower level after safety compensatory measures except the unit toxicity index higher. The shielding device or gas alarm failure was the main cause of gas poisoning. According to the analysis some feasible measures was put forward. The study has positive guiding significance for risk management and safety administration decision of the Combined Cycle Power Plant.
Study on Power Failure Probability Optimization Function of Power Grid
Authors: Kan Zhi Nan , He Nan
Published: February 2014

Improving the reliability of power supply and reducing the power failure cases are eager required by demand-side, it is also important for power company. By studying on the track of power failure, it can provide some suggestions for improving power supply. Therefore, the function of power failure probability is built, combined probability theory and matlab software. Taking advantage of relative statistics in x region, it makes a deep research on the power failure events and creates the model for power failure. Based on the study, it is helpful for calculating power failure loss of demand-side. Meanwhile, it points out the future work target for power company.
Design of Active Power Filter Based on DSP
Authors: Zhou Zhi Wen , Wang Cai Xia , Ma An Ren
Published: February 2014

Along with the access of nonlinear load and the development of electric power system, the harmonic pollution in power system is deteriorating. Harmonic not only affects the reliability, safety and economic operation of power system but also poses potential risks to power users. An active power filter with TMS320F2812 DSP as the core is designed for harmonic compensation for power system in this paper. With the hardware circuit configuring, software programming and circuit debugging, the system performances and parameters are tested and studied during normal operation respectively. The testing results show that the designed hardware circuit and software program are correct. The designed filter has the advantages of simple circuit structure and good compensation effect.
The Assessing Method of Mental Concentration Based on the EEG Evaluation Index
Authors: Li Yong Gang , Zhang Cong Cong , Liu Yan Mei
Published: February 2014

A method for assessing mental concentration degree is proposed in this paper, which is implemented by turning the raw brain waves extracted by brain-wave sensor into statistical indexes as Attention index and Meditation index. The experimental results indicate that the performance of this method is excellent. It is much more efficient and accurate in reflecting the groups mental state than the ordinary methods. Thus, it can be used as a reliable metric to determine students attention span in learning.
Brief Discussion on PSP and its Application and Implementation in Software Engineering Management
Authors: Li Zhi
Published: February 2014

After years of development, software process management has become a mature system that contains a lot of management practices and models, in which is the most well-known CMM process model. However it only provides process improvement guidance from macro perspective rather than micro perspective that containing clearly specific knowledge and skills required for the individual. PSP is designed for individual software engineers, and provides necessary and strong support for CMM implementation. Its methodology has become more and more mature and been applied widely. From the perspective of software quality management, this paper makes a systematic overview of PSP including its developing route, framework, application and so on , it also provides suggestions and measures for software companies to implement PSP.
Test Case Optimization Based on State Transition Reduction
Authors: Guo Xi , Wang Jian Yong
Published: February 2014

Due to the large number of status transition of large scale software system, an efficient test case generation method based on predicate abstraction is proposed aiming to the problem of status space explosion. The reduced abstract status is solved via mapping the status sets between the real status and abstract status, and then generated the reduced test case based on the transition of the status. The experimental results show that this method can reduce the status of the real model in a high efficient, and generate a smaller set of test case.
Study on Query Optimization of Distributed Database
Authors: Meng Yao
Published: February 2014

Distributed query optimization in contemporary distributed database system increasingly important role, excellent query optimizer algorithm can effectively improve the query performance of the system. This article will be distributed query optimization hybrid algorithm is applied to improve the performance of distributed query optimization algorithms. Through simulation experiments and comparing two improved algorithms and the merits of the original algorithm, results were analyzed and show that the improved algorithm is better than the original algorithm has been improved to some extent in achieving cost efficiency and other aspects.
Modal Comparison of Crankshaft under Multi-Speed
Authors: Wang Ran Ran , Teng Xian Bin , Xu Yan Ming , Ge Tao
Published: February 2014

Considering the effect of centrifugal force generated by the rotation to the crankshaft frequency and vibration mode, the frequency and vibration mode of multi-speed cases are calculated. The results showed that the impact of the centrifugal force on the crankshaft vibration increases with the increase of rotational speed, especially in the high speed region, this phenomenon is more obvious. From low speed to high speed, the vibration frequency has a large deviation, which shows that in this case, it is necessary to consider the frequency change caused by pre-stress.
Problem Solving Methodology in Industry
Authors: Annamalai Nagappan , Kamaruddin Shahrul , Azid Ishak Abdul , Yeoh Ts
Published: February 2014

This study presents the results of a literature review that was performed to identify and evaluate knowledge management such as problem solving (PS) methods are suitable for identification and analysis of risks on existing issues. The studied methods were compiled into 2 groups which is manufacturing, and research development. The key discussion would be where the PS tool is more relevant and how it help to solve the problem effectively. The aspects studied in the methods are presented together with a short description of its applications, area of the analysis and relevance to industry and education. Also some characteristics of the methods are given, as well as reference to previous key publications on the methods. The contribution of study is exploration on a new definition of PS methodology which is simplified and structured.
Analysis of the Evolution Mechanism of Industry Based on the Lifecycle Theory
Authors: Wu Min Hui , Huang Chun
Published: February 2014

Regional brand is the product of industrial cluster development. Upon the basis of lifecycle theory to study the relationship between regional brand and government network construction, with applied multi-cases study method, it reached the conclusions that: (1) The regional brand development is a staged process, with staged representations of the brand cultivation emphasis in light of development changes; (2) Governments exert important propelling roles to the industrial revolution; (3) The industrial features of different regions are varied, and regional brand shall develop in accordance with the life-cycle, regional features and industrial features to realize “customization”.
The Application of Three-Dimensional Unigraphics NX Software in Graduation Design of Mechanical Design Major
Authors: Li Yang , Zhou Yong , Wang Zhong Lei
Published: February 2014

In order to further improve the level of students' application of CAD software and the ability to satisfy the demands of enterprises, the application of the CAD software Unigraphics NX was researched and practiced in graduation design of mechanical design major. Technical requirements and implemented point for this new practice teaching method have been studied and instructed, and the feasibility and effectiveness of this innovative practical teaching also have been proved through teaching practice.
Surface Desuperheater Structure Improvement against the Cylinder Radial Cracks
Authors: Yang Jian Fei , Liu Qi , Zhang Xu , Zheng Yu Qing
Published: February 2014

The dominant factor is the inner condensate in the desuperheater, which leads to cylinder wall’s radicalized thermal fatigue cracks. The paper put forward a new design for desuperheater’s structure based on the traditional one. A baffle is placed between cylinder wall and coil pipe. In this way, the condensate will not drop on the cylinder wall directly. Therefore, the occurrence of cracks is impossible. Otherwise, welding parts between the led tube and the interior wall will generate flaw because of alternating stress.
Static Structural Analysis of the Blood Pump Rotor System
Authors: Sun Kang , Wang Jun Feng , Wu Xin , Ge Ji , Yun Zhong
Published: February 2014

In order to study the impact of external forces of the influence of the structural characteristics of axial flow blood pump rotor system.Using the blood pump rotor system as the research object,use ANSYS software,Use the method of static structure.the stress and strain analysis nephogram of the blood pump rotor system was obtained under the external load.through the study: The deformation of the blood pump rotor system which under the action of external load was mainly concentrated in the external contact of blade wheel rotor and ceramic shaft,but the deformation is small.So the blood pump rotor system design is reasonable. The vulnerability part of the blood pump rotor system was obtained.it provide date support for the further optimization of the blood pump rotor system and it also lay the foundations for the subsequent dynamic analysis.
Design of Laser Ignition System for Ejection Life-Saving System
Authors: Xu Liang Fa , Zhang Shuang
Published: February 2014

Now the ejection lifesaving equipment in aircraft depends on the mechanical transmission device to transmit the initial detonation energy,but the device is with many transmission links, high energy consumption, quick wear, high failure rate, and difficult to be detected, to improve the ejection lifesaving equipment performance, laser technology was used successfully to ejection lifesaving equipment, a new type of laser initiating system was designed, its structure ,detector and test method of the system are introduced. The laser energy of the system was transmitted conveniently, fficiently and the system is easy to be checked and maintained, thus which greatly improves safety and reliability of the ejection lifesaving equipment.
Magneto Rheological for Motorcycle Suspension Using Bouc-Wen Model
Authors: bin Ismail Mohamad Amiruddin , Muhamad Pauziah Binti , bin Abu Aminudin
Published: February 2014

This paper discusses the application of Magneto-rheological (MR) for motorcycle suspension. Previous studies on the usage of the MR fluids could enhance the performance and improved the vibration in systems such as buildings and vehicles. Therefore, MR motorcycle suspension system is proposed and investigated here by using Bouc-wen model. It is designed to bring comfort and safety to both rider and passenger also to improve the handling ability to the motorcycle. The effectiveness between the MR motorcycle suspension and the passive system is demonstrated by computer simulation. It is found that MR suspension system could eliminate external disturbance which obtain much better ride quality and handling performance to the motorcycle.