bluuebunny/crossref_metadata_2025 huggingface dataset:
Multiscale Model of Shape Rolling Taking into Account the Microstructure Evolution – Frontal Cellular Automata
Authors: Łach Łukasz , Svyetlichnyy Dmytro
Published: August 2014

Properties of traditional materials including steels can be improved by using the prediction and control of microstructure evolution in technological processes. Models of microstructure evolution, which take into account the technological conditions, allow to optimize the process in view of final product properties. A multiscale model of microstructure evolution have been developed and adopted for simulation of the shape rolling process. The model contains module based on finite element method (FEM) for simulation of technological processes and cellular automata (CA) module for simulation of microstructure evolution. Design and selection of grooves and simulations of rolling process in macro scale are realized by FEM. The modeling results obtained by FEM are transferred to CA and used as input data. The results of simulations of microstructure evolution can be presented as snapshots of microstructure at arbitrary time, changes of average grain size, a grain size distribution, recrystallization fraction and flow stress during the process. The results of microstructure evolution obtained by FCA for 5mm round bars rolled in diamond and oval grooves are presented in the paper.
A Survey of Common Technology and Data Model Standard of Equipment IETM
Authors: Liang Wei Jie , Jia Jin Na , Cai Li Ying , Xie Feng , Zhu Ning
Published: August 2014

Introduced the background of equipment Interactive Electronic Technical Manual (IETM), discussed the key standard common technology XML DTD/Schema, graphic interaction, etc. Form IETM common technology aspect, analyzed the main Characteristic, implementation scope, and advantage/disadvantage, and proposed the suggestion of technology selection. Analysis the different data model standard in the development process of IETM, put forward the basic principle of IETM standard selection, provided a useful reference of IETM project implementation.
Fracture Analysis of 6A02 Aluminum Alloy Subjected to Corrosion Fatigue Damage
Authors: Kong Guang Ming , Li Xu Dong , Mu Zhi Tao
Published: August 2014

With the aid of scanning electron microscope and energy spectrum analysis, the present thesis made a research on the fatigue fracture surface of AA 6A02 with corrosion damage as well as the effect of alloy element Si, Mg and the corrosion damage on the fracture process. Results indicate that the fatigue fracture surface is tough fracture with multiple fatigue sources. Pits introduced by corrosion damage will weaken the material property, which serve as crack nucleation sites. Proper hardening constituent element introduced during alloying process such as Si, Mg, who are in proper ratio of component to form strengthening phase Mg2Si without the excess phase of single crystal Si, will make strength and plasticity match, thus improve fatigue performance of materials.
Design of the Double-Stuffed Bag Machine Control System
Authors: Xu Peng , Zhong Fei
Published: August 2014

In order to save manpower, improve the quality of productions and the efficiency of productions, the double-stuffed bag machine is developed. After a lot of experiments and analysis, the way of double-stuffed is put forward and the Omron PLC is adopted as the main controller, and Omron HMI is adopt as the display device. According to the requirements of technology the number of PLC is chose, its extension is chose, the software about the control system is wrote. The efficiency of the double-stuffed bag machine reach 25 bags/minute. The efficiency of the device is greatly improved and can reach the domestic advanced level. The design scheme of double-stuffed bag improves the speed of the Cypriot bags, ensures the quality of the product, reduces the difficulty of the operation, and that has a good market prospect.
Nonlinear Position Control of Digital Hydraulic Cylinder Despite Disturbance
Authors: Xu Shi Jie , Xing J.F. , Peng Li Kun
Published: August 2014

A nonlinear controller is presented for a digital hydraulic cylinder against disturbance. We first establish the nonlinear model of digital hydraulic cylinder position control system. Then a Lyapunov function and a nonlinear controller are presented. The controller designing problem is translated into the problem of solving a linear matrix inequality. The experiment results show that the controller proposed by this paper has much better performance than traditional one.
Research on Virtual and Actual Complex Firing Test Method for Anti-Aircraft Weapon System
Authors: Ge Cheng Long , Zhu Yuan Chang
Published: August 2014

The status of anti-aircraft weapon system firing precision test is introduced firstly, and aiming at the deficiencies of high cost and long cycle and complicated organization process, a virtual and actual complex firing test method based on sampling is proposed and the principle of virtual and actual complex firing test is introduced. Then the structure chart of virtual and actual complex firing test system is put forward, and system’s major functions are mainly discussed in this paper. The data flow, organizing execution flow and validation notion of virtual and actual complex firing test are acquired finally.
Software System for the Multi-Field-Coupled and Multidisciplinary Optimization of Electronic Equipments
Authors: Zhang Zhi Hua , Li Peng , Li Shen
Published: August 2014

For solving the separate problem of electronic equipments structure and electromagnetic design, software system for the multi-field-coupled and multidisciplinary optimization (MDO) of electronic equipments is developed, based on electromechanical coupling theory, using parameterized modeling, MDO technology. The result of applied in reflector antenna and high density case shows that the system can promote analysis and design quality, shorten the design cycle, reduce the cost of design.
The Calibration for Dual-Robot System Based on the Three-Point Method
Authors: Kong Min Xiu , Yu Guang Dong
Published: August 2014

According to the calibration problem of the dual-robot system, a simple and quick calibration method is proposed in this paper. A new frame is established by the three non-collinear points which the robots handshake at. Then the transformation matrix between the first robot base frame and the new frame and the transformation matrix between the second robot base frame and the new frame will be known. After that, the transformation matrix between the two robots’ base frames will be calculated by the relationship between them. Then we simulate this algorithm in MATLAB to verify this method. After the simulation, we can find the validity of this calibration method.
The Design of Greenhouse Temperature Control System Base on SimpliciTI
Authors: Shi Xin Ya , Huang Jun , Guo Xiao Jin
Published: August 2014

The cable monitoring system of agricultural greenhouse has the problems of high power consume, high cost and the difficulty of wiring. In this paper a way to construct wireless sensor network (WSN) of star is introduced, and presents a Greenhouse Temperature Control System with SimpliciTI. The hardware modules use the ultra-low power MCU MSP430 and RF chip CC2500 as the core except for the upper computer. We firstly explain concepts and the architecture of our system and then introduce some important hardware design and the key software design in detail. Tests showed that the system can effectively control temperature, and be flexible installed in agriculture greenhouses.
The Implementation of Sub-Window Contrast Adjustment in Large Screen Displayer for Aircraft
Authors: Sun Shao Wei , Cao Feng , Huang Qin , Tan Ting Ting , Wang Neng Dong
Published: August 2014

With the development of modern aircraft, and the increasing aircraft performance day by day, the pilot need gain more and more information. The application of the large screen makes a lot of flight information on one display monitors. The large screen display picture is composed of several child pictures, which need several displayers formerly, but the display operation is not as convenient as traditional independent operating monitors. This paper proposes a method based on sprite in large screen display contrast and adjustment, through the collection of pilots’ touch screen operation information on the screen. And then it implements the sprite window open and the adjustment of the contrast in the FPGA. Using the proposed approach, the pilot can easily adjust the contrast of sprite in the large screen display, meeting the modern aircraft in all aspects of the mission requirements.
Virtual Assembly Training System of Special Equipment Chassis Based on Virtools
Authors: Zhang Jie , Wang Fang , Wang Xin Jun
Published: August 2014

In view of the problems of long training cycle, big loss, low frequency and high costs exists in traditional assembly repair training, this article builds a three-dimensional virtual training environment and a training method combined presentation and interaction using virtual reality technology. This application enables trainees to learn the WS2400A2 type special equipment chassis assembly repair knowledge on personal computer. This application not only can improve the training quality and efficiency, shorten the training cycle, save training funds and reduce equipment loss, also, has the advantages of safety, are not affected by the conditions of use and environmental restrictions.
Research and Development of Instrument Testing Device Based on LabWindows_CVI
Authors: Liu Xiao Qiang , Liu Hao
Published: August 2014

A research scheme of Automatic Testing System based on virtual instrument technique is presented in this paper. The virtual instrument technique is applied into the detecting instrument control system and detecting station is controlled with the programming language Lab Windows/ CVI. This testing platform adopts the design based on HTPXI2010I ,HTPXI3730,HTPXI4387,HTPXI4484 board. During the measurement and control process, the generation and collection of the start signal and the input signal based on the testing platform. Meanwhile, every parameter is collected in real time, saved and generated the test report.
The Design of Signal Generator in Motor Function Rehabilitation Based on MCU
Authors: Wu Fang , Guo Xin , Shen Xiao Yan , Zhou Yong Zheng
Published: August 2014

Objective: In order to promote paralyzed patients’ recovery of their motor function, we designed this functional electrical stimulation (FES) signal generator. Method: We used AT89C52 MCU and digital analog converter as the core to compose hardware system. By analyzing the time domain characteristics of common waveforms and the movement-related neural signals, we designed the corresponding MCU program, then the expected waveforms can be generated as signal sources of this therapeutic apparatus. Results:This signal generator is able to produce series of waveforms in the time domain, such as sine wave, rectangular wave, triangular wave signal, and neural signal bands related with movement .Conclusion: Compared with the traditional signal generators [1], this signal generator has the advantages of simple structure, complete functions, low cost and convenience. Using movement-related neural signals which were collected from animal experiments as signal sources is helpful to induce the coordinated movement and reduce the muscle fatigue.
pH Tunable Turn on and Turn off Quantum Dots Conjugated with Poly(2-(Dialkylamino)ethyl Methacrylate)
Authors: Huang Xian Nan , Li Wei , He Wei
Published: August 2014

A novel pH sensitive cadmium sulfide quantum dot (CdS QD) was prepared by a coprecipitation method in the presence of pH sensitive poly (2-(dimethylamino) ethyl methacrylate)-co-poly (2-(dibutylamino) ethyl methacrylate)(PDMA-PDBA) copolymer. CdCl2and Na2S were mixed in aqueous media in the presence of PDMA-PDBA. The amine groups of PDMA were anchored on the surface of the formed CdS nanoparticles, whereas the PDBA segment was anchored on the surface to form a hydrophilic palisade at low pH environment, thus turn on the fluorescence CdS QD probe; at high pH value, PDBA segments precipitate and turn off fluorescence because of the phase separation. This novel pH sensitive fluorescene CdS QDs probe have great application potential for target imaging of cancer.
Moving Target Detection Based on Double Model
Authors: Wu Xin Ping , Fu Min Cang
Published: August 2014

In order to overcome the problem that the single-Gauss model is poor of anti-interference and Gaussian Mixture model is poor of real-time, we present the double modeling algorithm of moving target detection. We use three frame difference method to distinguish the invariant region and complex region in background. And then we use single-Gauss modeling to model the invariant background while the complex region of background would be modeled with Gaussian Mixture modeling. It is more effective than the single-Gauss model and more efficient than the Gaussian Mixture model .The experimental results show that the improved algorithm is superior to the traditional single Gauss model or Gaussian Mixture model. It can detect moving target more quickly and accurately, with good robustness and real-time.
A New Edge-Based Method for Artificial Text Detection
Authors: Zhou Don Gao , Du Qi Cai , Lin Qiang , Lin Jia Yu
Published: August 2014

In video indexing and retrieval systems, textual information is high-level semantic content to describe images or video frames, which is also one of the most interesting objects of study. A great progress has been made in text detection in recent decades, but it is still a great challenge due to the complex background, various fonts and different languages, etc. In this paper, we propose a edge-based approach to detect artificial text. First, the image edge map and difference range map are calculated. Then the map is binarized by local threshold method. Finally the textual information is located through the regional projection analysis. Experience results show our method’s precision rate is 91.1% and recall rate 93.2%, which outperforms the previous work.
Research on Decision-Making of Fine Chemicals’ Extension
Authors: Ren Xing Li , Jiang Xing Rong
Published: August 2014

Fine Chemicals is an important direction and inevitable trend of development of China's petrochemical industry. In order to occupy the commanding heights of industry development strategy, many domestic chemical companies enhance their ability to resist risks, fine chemical products to take extended strategy. However, due to the fine chemicals own characteristics, while enterprises is in product extension, they are often faced with complex decision problems. Based on all of those, multi-product programs projects preferred aand the main product of the extension when siting evaluation are research.
Application of Improved Median Filtering Algorithm to Image De-Noising
Authors: Jiang Wen Long , Li Guang Lin , Luo Wei Bing
Published: August 2014

Based on the shortcomings of standard median filtering and combined with the mean filtering, this paper puts forward two improved median filtering algorithms referred as the weighted fast median filtering algorithm and the weighted adaptive median filtering algorithm. The experiment results with MATLAB show that weighted fast median filtering algorithm has a significant effect on low-density impulse noise, and accelerates the speed of real-time processing. The weighted median filter could effectively eliminate the high-density impulse noise from polluted images, and better maintains the details of the original image.
Research on Building IMC Model in Mobile Bank
Authors: Zhang Yun
Published: August 2014

Mobile banking as a fusion of mobile technology and banking business is becoming the bank to develop business. This paper uses historical induction and logical reasoning, then combine variety research methods in general and specific measures theory research to study. Transferring value from the customer point of view, we design integrated marketing communication system of mobile banking solutions..
Research on Text-Related Speaker Recognition Based on First Order Differential
Authors: Zhao Feng
Published: August 2014

LPCC and MFCC are methods of extracting voice characteristic, and they are based on pronunciation models and human auditory characteristics. In this paper, both of the two characteristics are used, LPCC and the First Order Differential are used to describe the dynamic changes of speaker channels; MFCC and the First Order Differential are used to describe the audible frequency characteristics of human ears, and the characteristics of input voice are extracted by using Speech Processing Toolbox in MATLAB, and VQ and HMM are combined to applying to speaker recognition, and the experiment result showed that the performance of the speak recognition is obviously improved.
Study on the Carbon Doping of Sugar Added MgB2 Superconductors Prepared by Low Temperature Sintering
Authors: Wang Rui , Ma Zong Qing , Yang Hui
Published: August 2014

With sugar as an addition, the active carbon released from sugar can lead to the effective carbon doping in MgB2 superconductors only under the condition of high temperature sintering. However, this kind of carbon doping cannot occur at low temperature sintering condition. The reason is that the carbon released from the decomposition reaction of the sugar added in MgB2 has very low chemical activity during low temperature sintering process, which is similar with the results of elemental carbon or graphite doping directly. Thus, only the sintering temperature reaches a certain temperature or more (generally greater than 700oC), the carbon can possess sufficiently high chemical activity and go into the lattice of MgB2 to replace the B. In the condition of low temperature, it is difficult to form an effective carbon-doped.
Research on the Application of BP Neural Networks in 3D Reconstruction Noise Filter
Authors: Li Xiao Peng , Chen Lan Zhen
Published: August 2014

At present, in the most of the digital image system, the input image is used to freeze the multi-dimensional image scanning way again into a one dimensional signal, then carries on the processing, storage, transmission and processing. Finally tend to form multi-dimensional image signal, and the image noise will also be decomposed and compounded. Electrical systems and outside influences in these procedures will enable precise analysis of complexity of image noise. According to off-line learning method of neural networks, this paper focus on the noise filter in the 3Dreconstruction process in order to make the image clearer.
Study on Extraction Method of Automobile Center Axis
Authors: Wang Lin , Chen Pei Jiang , Zhou Lian Xiang
Published: August 2014

In order to improve the accuracy of some items in vehicle inspection, the extraction method of automobile center axis based on image processing technologies was studied. The commonly used methods of detecting the center axis of automobile were introduced, including approximation method and linear fitting method, which advantages and shortcomings were analyzed. The center axis detection method based on centroid method was proposed. The mass center of automobile outline was gotten based on the binary image. By detecting the nearest two points in the outline fitting line from the center, the center axis of automobile was gotten. This method can greatly reduce the calculation amount and have certain application value.
The Application of Matrix Partitioning Algorithm in PageRank Computational Efficiency
Authors: Jiang Ming Fu
Published: August 2014

With the vigorous development of the Internet information age, work efficiency can be improved by finding the information needed accurately and quickly. Therefore, it is of vital importance to make an ordering for the relevant information web pages that are provided by the Internet. This paper proposes a kind of PageRank algorithm based on matrix partitioning to complete the ordering of relevant information web pages and applies this algorithm in the calculation cases whose experimental results on the aspect of improving PageRank computational efficiency show matrix partitioning can reduce iterations and improve computational efficiency.
Geometrically Robust Image Watermarking Based on Krawtchouk Invariant Moments
Authors: Bing He
Published: August 2014

In this paper an image watermarking based on krawtchouk moment invariants is proposed. krawtchouk moments are selected for image watermarking because image reconstruction with these moments is better than other orthogonal moments like Legendre, Zernike and Tchebichef. Watermarking is composed of the mean of several function of the first and second krawtchouk moment invariants order designed to be invariant to translation, scaling and rotation. The watermarked image is a linear combination of the original image and a weighted nonlinear transformation of original. The weight is computed such that the mean of the watermarked image invariants is a predefined number. Watermark detection is as simple as computing the moment invariants of received image. The experiment results demonstrate the proposed method can obtain better visual effect, meanwhile, it is also robust enough to some image degradation process such as adding noise, cropping, filtering and JPEG compression.
Synthesis, Photophysical Properties and Photoinduced Intermolecular Electron Transfer of a Novel Aryl Benzyl Ester Dendritic Axially Substituted Silicon (IV) Phthalocyanine
Authors: Chen Xiu Qin , Ma Dong Dong , Pan Su Juan , Wang Yu Hua , Chen Kui Zhi , Yang Hong Qin , Peng Yi Ru
Published: August 2014

An aryl benzyl ester dendritic axially substituted silicon (IV) phthalocyanine, a di-{3,5-di-(4-methoxycarbonyl group benzyloxy) benzyloxy) benzyloxy} axially substituted silicon (IV) phthalocyanine (DSiPc) was synthesized. Its structure was characterized by elemental analysis, 1H NMR, IR and ESI-MS. The photophysical property of DSiPc was studied by steady and time-resolved spectroscopic methods. The steric hindrance of dendritic structure can reduced the aggregation efficiently. The photoinduced intermolecular electron transfer between this novel macromolecule and benzoquinone was studied. The results showed that the fluorescence emission of this dendritic phthalocyanine could be quenched by BQ. Therefore, this novel dendritic phthalocyanine was an effective new electron donor and transmission complex could be used as a potential artificial photosynthesis system.
Modeling and Optimization of Mask Assisted Laser Transmission Micro Joining Process
Authors: Zhao Zhen Guan , Liu Hui Xia , Cai Ye , Wu Yan Wei , Wang Xiao
Published: August 2014

This article uses semiconductor laser for mask assisted laser transmission micro joining PET and PET with clear weld absorbents, the mask slit width is 0.3mm, using CCD to plan experimental design. The mathematical model of joining process parameters with joint strength and joint width was established using response surface methodology. Experimental verification was also done. The actual joint width was compared to mask slit width and the process parameters were optimized. The results show that the mathematical model can response the relationship between process parameters and joining quality, the mask can effectively control the joint width, reasonable process parameters can obtain high-precision, high-intensity joining quality.
3D Finite Element Simulation of Inclined Cutting of Hardened 45 Steel
Authors: Li Guo He , Cai Yu Jun , Li Hui Yan
Published: August 2014

The research of the simulation for high speed cutting is usually based on 2D modeling by now, and the 3D simulation is few. Because the cutting process is a 3D deformation of workpiece, it's badly in need of the research on 3D finite element simulation of cutting process for further reveal the mechanism of high speed cutting. The 3D simulation of inclined cutting of hardened 45 steel (45HRC) is carried out base on ABAQUS. The forming process of serrated chip is simulated by adopting the Johnson-cook material modeling and separation criterion of shear failure. The change of chip morphology, chip flow angle and deformation coefficient of width under different rake angle and cutting depth are analyzed. The results show that the segment degree of chip becomes larger with the decrease of rake angle and increase of cutting depth. The chip flow angle is not effected by rake angle and its value is approximately equal to tool cutting edge inclination angle, an it increases with the increase of cutting depth. The deformation coefficient of width increase with the decrease of rake angle and increase of cutting depth.
Experimental Study on Ultrasonic Assisted Grinding of C/SiC Composites
Authors: Ding Kai , Fu Yu Can , Su Hong Hua , He Tao , Yu Xi Zhai , Ding Guo Zhi
Published: August 2014

In the present work, ultrasonic assisted grinding (UAG) and conventional grinding (CG, without ultrasonic) tests of Carbon fiber reinforced silicon carbide matrix (C/SiC) composites were conducted. In addition, analysis was done by comparing the machining quality, grinding force, and specific grinding energy between the two processes. The results showed that material removal mode of carbon fiber both in CG and UAG were brittle fracture, and fracture size had no obvious difference. Compared with CG, brittle fracture area of SiC increased during UAG. In comparison with CG, the normal grinding force and tangential grinding force for UAG were reduced maximally by 45%, 39% respectively of those for CG. Accordingly, specific grinding energy was also reduced by UAG. Therefore, UAG can improve the grinding performance of C/SiC composites significantly.
Experimental Study on a Piezoelectric Energy Generator Excited by Rotating Magnets under Different Holding Conditions
Authors: Jin Xian Fang , Wang Shu Yun , Kan Jun Wu , Huang Fang Sheng , Yu Jie , Qian Jun
Published: August 2014

To meet the demand of rotating mechanism for self-powered monitoring system, piezoelectric energy generator (PEG) excited by the magnetic coupling force between rotating magnet fixed on a rotator and one magnet fixed on piezo-beam under different holding condition was presented. The influence of holding conditions (both sides holding, free holding, right side holding and left side holding) and rotating speed on energy generation of the PEG was investigated experimentally. The research results show that the holding condition exerts great influence on the peak voltage and the relative optimal rotating speeds at speed range of 0 to 1200 r/min under one magnet fixed on the end of the piezo-beam and one rotating magnet. Taking a example, when the configuration mode of rotating magnet and the fixed magnet is attract, under free holding the achieved peek voltages from the PEG are 23.6/49.6/69.2V at 300/336/456 r/min respectively. When rotating magnet and the fixed magnet attracting, under left side holding the achieved peek voltages from the PEG are 32.4/33.6/29.2V and under both sides holding the achieved peek voltages from the PEG are 16.4/16.4/16.8V at 300/336/456 r/min respectively.
A Highly-Eficient Method of Manufacturing Metal Fiber
Authors: Chen Zei Fei , Zhang Lang , Ye Bang Yan
Published: August 2014

A high-efficient method is introduced, which is used for manufacturing long metal fiber. It is based on a special cutting tool, charactered by its multi-tooth shape edge, which can manufacture several metal fibers simultaneously, therefore improve the productivity and the quality of metal fiber greatly.
Parametric Design of Key Components in Downhole Motor
Authors: Zhou Si Zhu , Zeng Hao Yong
Published: August 2014

Downhole motor is an instrument to drill oil wells, different from rotary drilling in working methods. While downhole motor works, the drilling stem of which remains still supplies power to bits directly so that a much higher transmission efficiency of power can be achieved. Downhole motor has been a key developing downhole tool recently. It is installed in a limited space with a certain diameter, asking for a higher power, so the design of which is rather difficult. This paper mainly studies the key components of downhole motor in structure design and its working characteristics. And parametric design employed in series design to shorten design cycle is presented in this paper. After taken Solidworks as a basic software platform and turbodrill turbine section with diameter of 245mm as an original model, parametric design of key components in downhole motor has been achieved by setting the parameters of key components, adding relations, editing program, creating a new part etc. Parametric design methods presented in this paper has already been applied in series design of downhole motor at Yangtze University.
Research and Application of PV Intelligent Control System of Sustainable Supply
Authors: Wang Zhong Xian , Wei Yong Geng , Song Yi Lin
Published: August 2014

As the primary energy consumption and environmental pollution increasing seriously, green energy has been more and more got attention of researchers both at home and abroad, especially the study of solar occupies a large proportion in the development of green energy. The photovoltaic (PV) power supply system has many advantages, however, there are still problems, e.g. low voltage, low power, poor ability to resist disturbance. Around these problems, the paper designed a PV power supply control system could realize the uninterrupted power supply, including DC and AC supply. By the method of combining software with hardware, through the solar panel to the configured two pieces of battery could realize the function of fast and float charging, and the supply battery is changed by testing the battery power to load uninterrupted power supply. Moreover, when the output voltage of the solar panel is lower than the battery, the output voltage of solar panel is boosted by DC/DC circuit to make the solar panel at low pressures also to charge the battery, effectively solving the difficult solar energy in the weak power supply problem. Finally, the design of PV power supply control system not only could realize DC supply, and also AC power supply by SPWM method, which has good effect of power supply.
Research of Matching Power for Photovoltaic Charging Control System
Authors: He Xin Sheng , Dai Zuo Cai , Gao Chun Fu , Deng Shao Tai
Published: August 2014

For the maximum output power varies with changes in load characteristics match the characteristics of solar cells in photovoltaic power generation system, the system runs through dynamic MPPT maximum power of self-optimizing process to achieve power from the PV charge control match. First, the output characteristic simulation analysis of the solar load resistive, capacitive load showed that solar power batteries for load matching efficiency is higher than in a purely resistive load. Then, using the improved algorithm for variable step size perturbation and observation of the received output power of solar power and load matching control, experiments showed that the optimum operating point of the circuit can control the real-time monitoring of solar cells and load. The output power from the battery load matching circuit to match the time working in the best working condition, if the energy is surplus or shortage, the system can control dynamic self-optimizing adjustment to charge, which leads to batteries absorbed power increasing and the efficiency of solar energy collection improving.
The Connector Blanking Fracture Surface Quality Prediction in Progressive Stamping Based on Support Vector Machine
Authors: Gu Li Zhi , Wang Lei , Zheng Tian Qing
Published: August 2014

The influencing factors of technical parameters on blanking fracture surface quality are quite few and complicated, including clearance, speed, die roughness and punch radius. And determination of these influencing factors and optimization of the process parameters combination are vital to the blanking with stability and duration. The determination of these parameters depending on experience of designer in production leads to a longer development period and higher cost in testing modes. In the current study, a kind of prediction method for fracture surface quality was put forward by using nonlinear mapping properties and learning capacity of the support vector machine theory in which nonlinear input can be mapped into higher dimensional space by selecting kernel function RBF, and compromise parameter with C=0, and expectation error of ε=0. 1. The final production model was obtained by practice with orthogonal experiment of four factors times three levels. Experimental verification was conducted by selecting a number of test data. Results have shown that the predicted values were in good agreement with those from tests.
Diamond-Bead Wire Classification and Spectrum with POS Part I: Classification with Process and Object
Authors: Gu Li Zhi , Wei Sheng Jun
Published: August 2014

As a new kind of cutting and grinding tool, diamond-bead wire has gained multi-patterns and many applications. It is commonly comprised of six elements pertaining to corresponding roles for the capacity of the wire: wire rope, diamond bead, clip, spacer, joint, spring or plastic/rubber. For further systematic understanding of diamond-bead wires, researching and developing new bead wires,and making full use of bead wires, it is desperately needed to properly classify diamond-bead wires available and those that may exist in theory. The current study collected and analyzed systematically a hundred of patterns of diamond-bead wires from the diamond-bead wire manufacturers throughout the globe went insight into the essential elements of the wire, including the overall layout, shape characteristics, technological processes, cutting and grinding object, and studied in classification for the spectrum characteristics. And the structural feature covers skeleton package, spacing washer, and special structure; manufacturing process contains bead manufacturing methods and the wire producing processes; and sawing object includes the soft stone, hard stone, and other substances. A trial spectrum has been drawn on the POS classification. All the subjects were discussed and presented in two parts, and here is the first part for classification with processes and objects.
Numerical Investigation on Laser-Assisted Flow Forming Process
Authors: Sun Ling Yan , Yang Chao
Published: August 2014

Recent years laser-assisted manufacturing techniques are increasingly the focus of the automotive and aerospace industry due to cost price, low energy efficiency and safety. Among these techniques is laser-assisted flow forming process that combines laser beam technology with conventional flow forming process. During forming the material undergoes a rapidly heating and cooling cycles with the irradiative action of the laser beam, which is quite different from the traditional process. A transient three-dimensional model was developed to investigate the influence of laser irradiation on the forming process, in which a user-defined function was created to overcome the problem of a moving Gaussian heating source. The result indicates that a ring-shaped temperature field is acquired when the heating source scans workpiece along a thread; the deformation area on the workpiece during forming is extensively and continuously heated by intense laser radiation and the thermally induced loss of material strength significantly increases the formability concerning the achievable material reduction rate and tool service life; the possibility of accuracy improvement by laser assistance has been investigated and an accuracy error decreases 10%-28.5%.
Research on Nonlinear Driving Control and Driving Force Calibration of Pure Electric Vehicle
Authors: Zhou Hong Bo , Cao Jian Bo , Zhou Ze Xin , Wang Tao , Jin Li Li , Yu Xiao Li
Published: August 2014

According to the main problems of nonlinear driving control and driving force calibration of pure electric vehicle, based on the research of permanent magnet synchronous motor control method, on the vehicle's driving force calibration techniques were studied, from the high efficiency and energy saving analysis of necessary driving force calibration, designed a new driving force calibration method, and drew the control curve of the accelerator pedal opening and the speed and the motor torque relationship between the three, and finally to pure electric self-developed to test platform for automotive related experiments. The experimental results show that, in the vehicle driving process, the driving force calibration technique compared with the previous calibration has better performance, while no obvious change of acceleration performance, the current value of the initial acceleration phase have been greatly decreased, could make the vehicle run more energy efficient, extended battery life and vehicle driving mileage.
Modeling and Optimization of Laser Direct Joining Process Parameters of Titanium Alloy and Carbon Fiber Reinforced Nylon Based on Response Surface Methodology
Authors: Cai Ye , Huang Chuang , Liu Hui Xia , Meng Dong Dong , Wu Yan Wei , Wang Xiao
Published: August 2014

A laser direct joining (LDJ) experiment of titanium alloy (Ti-6Al-4V) and carbon fiber reinforced nylon (PA66CF20) is presented here using diode laser equipment. Experimental design and experiment of LDJ are carried out according to a single process parameters range obtained from the previous experiment. Response surface methodology (RSM) in Design-Expert v7 software is adopted to establish the mathematical model between LDJ process parameters and joint quality. Then the interaction effects of joining process parameters (laser power, scan speed and stand-off distance) on joint quality are investigated using analysis-of-variance (ANOVA), and the result shows that the interaction effect of laser power and scan speed on joint quality is the greatest. Finally, the predicted values from the mathematical model established by RSM are compared with the experimental values, and the process parameters are optimized to obtain the strongest joint strength. The result suggests that the predicted values are in good agreement with the experimental ones. The purpose of predicting and optimizing joint quality based on reasonable process parameters is achieved.
How Coupler-Knuckle’s Surface S Angle Impact on Coupler Operation Performances
Authors: Lu Bi Hong , Wei Wen Yi , Qu Bao Zhang
Published: August 2014

The rail wagon coupler is casting part. Some of foreign products’ error dispersion is significantly greater than domestics’. What influence generated by the results acting on the actual use of performance is still not clear. To this end, this article studied the influence generated by the angle of surface S tangent of coupler-knuckle on coupling connection contour and starting bearing line (referred to as surface S angle) to traction reliability, coupling feasibility and acting force in tangent line, systematically. And authors explored the value ranges of surface S angle in order to ensure the operation performance of coupler-knuckle. Firstly, find the major factors which are associated to surface S angle by studying the movement mechanism of coupling and traction. For example, the maximum level angle of coupler-knuckles, the ability for vehicle to pass the curves, etc. And then, get analytical expression of coupler surface S angle and related factors by means of theoretical derivation. After that, obtain value ranges of surface S angle. Finally, carry on experiments with multi-body dynamics simulation software RecurDyn. On the one hand, eliminate unreasonable value ranges obtained by theoretical derive, on the other hand, analyze the changing rule of the acting force on coupler-knuckle contour. The results prove that, when coupler surface S angle is , the traction performance of coupler is relatively stable, the coupling performance is relatively reliable, the contact force on coupler-knuckle contour is smaller. The conclusion is consistent with surface S angle parameter required by the standard system of Association of American Railroads. The research results above provided the theoretical basis for improving coupler’s manufacturability.
Control System Design of New Nanoelectric Boiler
Authors: Shen Ji Feng , Luo Han Pin , Cao Jian Bo , Wang Rui Kun , E Shi Ju , Xu Chen
Published: August 2014

Traditional electric heating boilers have disadvantages, such as low purity of the heating resistor, low electric conversion efficiency, poor stability, high acquisition, maintenance costs and so on. This paper, on the one hand, analyzed the basic rationale of the current electric heating boilers, and on the other hand, the advantages of nanomaterials. Based on the combination of the basic rationale and the advantages mentioned above, this paper then designed a new type of electric heating boilers, including the relevant control system, which used nanoelectric membranes as the heating component. This new nanoelectric boiler adopts a brand-new heating method, and it does not get heat by the combustion of chemical energy. On the contrary, the electrical energy is directly converted into heat. This new nanoelectric boiler is equipped with the intelligent control system, and uses computers to realize complete automation. It has excellent physical stability, high electric conversion efficiency and power factor as well as a large power density, and low-carbon environment. Compared with the conventional products of the same electric power, this new type of electric heating boilers can save 30% to 50% of energy. Besides, it is environmental-friendly and functional.
Research on Non-Circular Gear Hobbing Simulation Based on Piecewise Cubic Spline Fitting
Authors: Li Da Zhu , Xia Lian , Liu You Yu , Han Jiang
Published: August 2014

In order to solve the hobbing machining data calculation and hobbing simulation of non-circular gear with various shapes, the piecewise cubic spline fit method has been adopted to unify the polar coordinate expression of non-circular pitch curve. The method to generate hobbing machining data was deduced based on hobbing linkage mathematical model, and the machining data error caused by piecewise cubic spline fitting method was analyzed. The three-dimension software has been used as simulation tool to make secondary development, and then non-circular gear hobbing simulation was realized based on machining data, which can verify the validity of machining data and the relevant design drawbacks of non-circular gear. The work of this paper lay a good foundation for design parameters optimization and hobbing of non-circular gear.
Modal Analysis around the Sun Wheel Non Equidistant Arrangement of Double Branch
Authors: Zhao Xue Zeng , Wang Xi Gui , Wang Yong Mei
Published: August 2014

In this paper, dynamic model of two stage power branch double wide helical gear planetary drive system based on complex, in-depth study of the natural vibration characteristic. Starting from the first star and second planetary gear around the sun wheel non equidistant arrangement in the respective gear train, calculating modal analysis of characteristics of the system, so as to understand the mechanism of the system vibration, to provide theoretical guidance for the design of underwater device two power branch double wide helical planetary composite transmission system. At the same time to improve the dynamic characteristics of the device structure of underwater engineering significance.
Capture Process Simulation for a Prone-Cone Microsatellite Docking Mechanism
Authors: Dai Ye , Ma Rei Dong , Yu Yang Tao , Xie Bao Cheng
Published: August 2014

Focusing on the On-Orbit Servicing technology, a novel automatic autonomous probe-cone docking mechanism used for microsatellite docking is proposed. The structure of this mini docking mechanism is provided, and a virtual prototype model of the mini-type universal docking system is established by using MATLAB software. The simplified dynamic analysis model during the capture process is established. The dynamic characteristic analysis of the capturing process is completed to research the influence of the key parameter, and the simulation results meet the designs demand of mini-type universal autonomous docking mechanism.
Modeling of Harmonic Drive System with Low-Frequency Resonance
Authors: Hei Mo , Zhou Qing Kun , Liao Hong Bo , Fan Shi Xun , Fan Da Peng
Published: August 2014

In the design process of lightweight harmonic drive system, low-frequency resonance generally affects controller design, and restricts system servo performance. In the design stage of system, it has great significance that the resonant frequencies and dynamic performances could be predicted. This paper presents a modeling method of harmonic drive system which has low-frequency resonance. Takes an uniaxial harmonic drive system as example to describe the implementation process of the modeling method. The dynamics model of harmonic drive system has been built. Using Ansys, Recurdyn and Matlab, the rigid-flexible coupling dynamics simulation model of system has been established. The simulation model analysis and the actual system experiment have been done respectively. Comparing the simulation and experiment results, it shows that: the open-loop time-frequency domain characteristics and the structural modals of simulation and experiment results are basically consistent. Using this method, the resonant frequency and dynamic performance of harmonic drive system can be predicted in the system design stage, and improve design efficiency.
Fractional Order PID Control of Railway Rescue Crane Leveling System
Authors: Shao Jun Peng , Zhang Ling , Jin Zhao Hui , Yang Xiao Dong
Published: August 2014

Aiming at the overshoot problem of electro-hydraulic position servo system used in the process of railway rescue crane hydraulic automatic leveling, and based on its characteristics such as big output power, high control accuracy, quick response speed, et al, this paper established the linear mathematical model of railway rescue crane electro-hydraulic automatic leveling system, besides, the fractional order PID control method was proposed based on the oustaloup digital filter algorithm and the working principle of fractional order PID control method was given, and then the fractional order PID controller was designed. In order to verify the effectiveness of the proposed control strategy, the MATLAB/Simulink simulation software was used. The simulation results show that the fractional order PID controller improved the speed of electro-hydraulic servo system unit step response and the capacity of resisting disturbance compared to traditional integer order PID controller, besides it can ensure the response without overshoot at the same time, so it meets the requirements for rapidity and no overshoot of railway rescue crane hydraulic automatic leveling system very well.
Modeling and Motion Control of Hydraulic Biped Robot
Authors: Shao Jun Peng , Gao Bing Wei , Li Jian Ying
Published: August 2014

The foot robot has a good adaptability to terrain and hydraulic drive has a great power to weight ratio compared with other drivers, therefore, a hydraulically actuated biped robot is proposed to meet the need for the high flexibility and high load capability, and each leg has four degrees of freedom. According to the proportion of human leg, the leg mechanism of biped robot is designed .A kind of simplified structure of the hydraulic biped robot is put forward based on the analysis of the structure. The model of the leg is established by Lagrange equation to obtain the corresponding dynamic model; the model of the hydraulic system is established according to the hydraulic control theory; the whole model of the leg is obtained combined with the two models. The variable structure control is suitable for the complex high-order control system, keeps invariant for external disturbance and parameter changes, and easily implements the control algorithm on-line, so the variable structure control is used to study on the motion control of the robot. The simulation is executed in Matlab software, which verifies that the mechanical structure is reasonable and the control algorithm is effective.