bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamics Grey Forecasting Model of Time Grating Numerical Control Rotary Table
Authors: Chen Zi Ran , Zheng Fang Yan , Chen Xi Hou , Zhang Tian Heng
Published: November 2012

Time grating is a novel displacement sensor with new principle which employs time to measure space. This sensor avoids relying on the precise mechanical spatial division technology to realize precise measurement which challenges the traditional view of measuring space by precise mechanical spatial division. Research on dynamic grey model for time grating applied for full closed loop numerical control rotary table instead of optical grating is presented. According to dynamic model, a next angular displacement of data series can be forecasted based on series of previous angular displacement value before corresponding sampling time comes. So forecasting incremental angular displacement can be converted into continuous pulses to sent out with PWM technology. Original absolute angular displacement signal sampled during equal time interval can be converted into incremental continuous pulses which enable time grating applied for numerical control system. As regard to error control, actual output incremental continuous pulses represent differentials between forecasting incremental angular displacement and forecast error of last measurement period. In this way, forecast error can be calibrated between neighbouring measurement periods, so cumulative errors can be eliminated. The accuracy of incremental type time grating signal can reach -2.8″~3.87″which proves dynamic model validity.
A Fitting Method for Establishing an Aeroengine’s State Variable Model Based on Process Identification
Authors: Kong Xiang Xing , Wang Xi
Published: November 2012

The bias derivative method for aeroengine’s State Variable Model(SVM) doesn’t have a satisfying accuracy. This method usually needs a linear modification to achieve a higher accuracy. In order to obtain a SVM with a good accuracy, this paper proposes a process identification based method. In this method, the coefficient matrices of the SVM are identified based on the input and output of the nonlinear model, according to the principle that the step responses of the SVM and the nonlinear model should be consistent. Then, the SVMs of small perturbation about steady operating points of an engine are established. Simulation results show that the SVMs established by the process identification based method have a good fidelity both in terms of steady and dynamic performance.
Modified Strong Tracking Filter for the SOC Estimation of Lithium Battery in Electric Vehicle
Authors: Cheng Ze , Zhang Yu Hui , Liu Yan Li
Published: November 2012

In electric vehicle management system, the key technology is to estimate the SOC (state of charge) of battery in dynamic process. This paper builds the state space equation of lithium battery based on improved Randle’s model, realizes the tracking estimation of SOC using modified STF(strong tracking filter) algorithm. The simulation result proves that compared with the original algorithm, modified algorithm can greatly improve the system’s tracking ability as well as the estimation accuracy of SOC.
The Experiments of Cantilever Piezoelectric Vibrator Power Generation
Authors: Qian Su Xiang , Hu Hong Sheng , Ge Li Xia , Song Jia You
Published: November 2012

Papers on cantilever piezoelectric resonators experiment research in the low frequency vibration environment. The study proved that, to choose a proper mass can effectively regulate the cantilever piezoelectric vibrators natural frequency The more close to the incentive frequency and the natural frequency of piezoelectric vibrators, the better the results of piezoelectric vibrators power generation.
Harmonic Frequency Cascade Static Synchronous Compensator
Authors: Zhu Jian Hong , Chang Wei , Pan Wen Xia , Gu Ju Ping , Wu Xiao , Chen Feng , Qiu Ai Bing
Published: November 2012

Traditional Static Synchronous Compensator(STATCOM ) compensates most singly for reactive power or steady state voltage in high power field. On this point, the paper puts forward a harmonic frequency compensation technique, which can realize dynamic reactive power compensation as well as harmonic control of less than 20th power. Then, using average switching method, it gives the mathematical model on the device. Active and reactive current decoupling is realized. For the electrical model, the compensator developed uses 8-cascaded H bridge structure, together with the carrier phase-shifted SVM technology, can realize 17 level voltage waveform output, having high utilization and easy to realize digital. Finally, simulation and experimental results show that the harmonic frequency control technology developed for 6kV cascade compensator can be used on the actual electric network, with low switching frequency. The device can together compensate reactive power and control harmonic accurately and effectively.
Applied Research of Smelting High Nitrogen Steels by Bottom-Blowing Nitrogen
Authors: Wang Shu Huan , Zhao Ding Guo , Cui Xiao Jie , Li Qiu Jing
Published: November 2012

The method of smelting High nitrogen steels by blowing nitrogen from the device bottom is a promising way of increasing nitrogen with gas. Introduced the device and technical development of smelting High nitrogen steels in domestic and foreign countries, expounded the method and character of dissolving nitrogen into liquid steel at high temperature and high pressure, and analyzed the advantage of increasing nitrogen by bottom-blowing nitrogen. The domestic research is at the developing period of experimental research. The High nitrogen steels which content is more than 1.0% was produced with bottom-blowing nitrogen method at high pressure. The velocity of dissolving nitrogen with bottom-blowing was increased and the smelting time was shortened. The technical effect was very good.
Structural-Acoustic Analysis of Automobile Passenger Compartment
Authors: Zhou Shu Wen , Zhang Si Qi
Published: November 2012

Besides the performances of handling, stability, ride comfort, power and fuel economy, the sound pressure levels in the automobile passenger compartments heavily influence the customer’s purchasing decision. The interior acoustics of automobile passenger compartment was analyzed in this paper. The frequency response analysis was performed on the vehicle body due to road roughness. The frequency response of vehicle body’s output spectrum, nodes’ velocity is used as the boundary condition of the acoustic cavity. With boundary element method and acoustic transfer vector method, the panel acoustic contribution was analyzed. By modifying the stiffness, damping or mass of the corresponding panel, the acoustic pressure levels at the driver’s and passenger’s ear were decreased.
The Mill Pacing Research Based on the Optimized Plate Model
Authors: Zhang Qing Xin , Fan Zhi Ping , Zhang Shan Wei , Yu Hui Yang
Published: November 2012

In This paper, in the background of a plate milling system in China, various influences on mill pacing in plate rolling are taken into consideration, a plate model by using the objective optimization theory based on the field statistics are introduced. This model based on the differential evolution, that establishes the objective function of rolling quality-temperature waiting time-rolling time, and uses concurrent optimization for the plate rolling of various needs. The results could get a series of Pareto sets to content the different requirements of determining the contiguous slab’s out-stove time interval. Lastly, the test examples are simulated to check up, the Pareto sets are calculated, and the result shows the method is effectiveness.
Method and Application of Intelligent Reconfigurable Control
Authors: Li Zheng Qiang , Zhao Jing Zhou
Published: November 2012

In this paper we propose an intelligent adaptive retrofit reconfigurable controller in which the full system states are reliably measurable and available for feedback and diagnosis. The proposed approach retains the existing nominal controller and adds a suitably chosen signal that assures that the desired closed-loop performance is achieved despite the failure. The approach is based on the properties of the system controlled by the nominal controller, and judiciously chosen adaptation signals. Furthermore, some representative methods of intelligent reconfigurable control are introduced, especially intelligent fault diagnosis and intelligent reconfigurable control strategies based on adaptive neural networks and fuzzy reasoning has been discussed in details, which has ensure that the aircraft has retain its flying qualities to a satisfactory level even to the presence of severe control failures. The ability to control aircraft is shown through simulation results with the intelligent reconfigurable controller using the adaptive fuzzy-neural reasoning of the aircraft.
A New Method to Control and Monitor a 6 D.O.F. Robot Arm
Authors: Pei Yan Ming , Li Kai , Liu Yun Hong
Published: November 2012

This paper mainly talks about the design of a controlling and monitoring system of the robot arm based on FPGA. The robot arm has 6 DOFs (Degree of Freedom). Every joint was driven by a servo motor. These servo motors were located as the finger, the wrist, the three arms and a rotatable platform. The FPGA programs were completed using the Verilog HDL. We programmed a LabVIEW VI to function as a controlling center. The data between PC and FPGA were transported through a ZigBee wireless network which consisted of 2 XBee devices and a wireless camera. They were used to monitor the moving condition of the arms. The experimental results show that the robot arms move with no apparent delay controlled by the host computer. The real-time display of the arm’s status is realized by the upper computer.
Effect of Rotating Electromagnetic Field on Corrosion Behavior of CuNi10Fe1Mn Alloy Tube Billet
Authors: Li Guo Bin , Huang Ye Hua
Published: November 2012

The effects of the rotating electromagnetic field (REF) on the corrosion behavior of the CuNi10Fe1Mn alloy tube billets were investigated by immersion test and electrochemical measurements. It is found that the imposing REF can be used to improve the resulting microstructures which affect the corrosion behavior of the CuNi10Fe1Mn alloy tube billet. The REF could induce the microstructure changes of the CuNi10Fe1Mn alloy tube billets and result in the gains refinement and the preferred orientation on the crystal plane. The improvement of the corrosion behavior is contributed to the change of microstructures of BFe10-1-1 alloy tube billets. The electrochemical measurements and immersion test show that the CuNi10Fe1Mn alloy tube billets with REF increase the corrosion resistance compared with the CuNi10Fe1Mn alloy tube billets without REF. Therefore all these observations suggested a nobler corrosion behavior of the CuNi10Fe1Mn alloy tube billets with the REF.
Mining Method for Weighted Concise Association Rules Based on Closed Itemsets under Weighted Support Framework
Authors: Qu Zhi Cheng , Ye Meng , Jiang Bin
Published: November 2012

Association rules tell us interesting relationships between different items in transaction database. But traditional association rule has two disadvantages. Firstly it assumes every two items have same significance in database, which is unreasonable in many real applications and usually leads to incorrect results. On the other hand, traditional association rule representation contains too much redundancy which makes it difficult to be mined and used. This paper addresses the problem of mining weighted concise association rules based on closed itemsets under weighted support-significant framework, in which each item with different significance is assigned different weight. Through exploiting specific technique, the proposed algorithm can mine all weighted concise association rules while duplicate weighted itemset search space is pruned. As illustrated in experiments, the proposed method leads to good results and achieves good performance.
Research on Air Target Attitude Testing Technology
Authors: Liang Zhi Jian , Ma Tie Hua
Published: November 2012

Combining domestic and foreign literature, the technology of flight attitude testing technology was summarized. The research process of this field includes independently inertial measurement unit and inertial navigation system. The previous stage is the test technology only depend on one kind of navigation equipment, such as Gyro, accelerometer or electromagnetic sensors etc, the latter means various combinations of measurement units, on the basis of complementary advantages in performance to improve testing accuracy each other. Based on the testing technology was analyzed and compared, configuration, merit and demerits of multi accelerometer were discussed. The future development of this technology was prospected finally.
Trajectory Tracking Control of Hypersonic Reentry Vehicle Based on Adaptive Fuzzy System
Authors: Yang Bo , Wang Yuan Chao
Published: November 2012

Considering inaccurate model and simplified calculation problems of the hypersonic reentry vehicle, this paper presents an adaptive fuzzy control system of the trajectory tracking control method. Firstly we introduced the principle of fuzzy system, then used fuzzy control theory to approximate the second-order drag acceleration model and got drag model by fuzzy identification, finally designed the adaptive controller. The simulation results show that the fuzzy adaptive tracking control method don’t depend on the dynamic model, but only rely on drag of the vehicle suffered, it can be measured directly or obtained by the aerodynamic model of the flight, the can generate tracking guidance control law, and the fuzzy adaptive tracking control method enables hypersonic vehicle to track the drag reference trajectory, realizes safe reentry and the terminal states can meet the requirements of the terminal constraints with high precision.
Effect on Gray Balance Caused by Slight Chromaticity Deviation of Paper in Image Reproduction
Authors: Wang Huan Mei , Chen Guang Xue , Cui Xiao Meng
Published: November 2012

Gray balance is the basic and critical control parameters of color reproduction, which plays important rule as lever in color reproduction which balance the correlation of material characters and process control parameters. This paper focused on investigation about gray balance data variation caused by slight chromaticity deviation of printing material. In the experiment the creation procedure of gray balance curve was simulated by EPSON Stylus Pro7880c ink-jet printer, and delivered curves were compared with each other. Accordingly the tone value variation of primary color was analyzed in terms of chromaticity deviation of paper. Meanwhile the variation tendency of gray balance impacted by ink and paper property was qualitatively discussed according to data comparison with G7 method. Results show that tone value of Y is so sensitive to paper chromaticity deviation that even the dominant relation between Y and M tone will be altered. At the same time, the more the ink and paper property coincide with ISO standard, the more curve of gray balance curve coincide with theoretically ideal value.
Automatic Data Statistics of Materials Failure Case Utilizing Ontology
Authors: Shi Peng , Li Jiang Hua , Ding Lian Hong
Published: November 2012

Materials failure cases are typical examples of failed materials or components during their service. Statistical data of failure cases is very important to improve the design and maintenance strategy. Usually statistical data of failure cases is manually collected and analyzed by domain experts, because this procedure needs sufficient domain knowledge. It is a time-consuming task. This paper proposes a novel method to automatically get statistical data of failure cases aided by ontology. An application of failure case statistics in nuclear power plant is also described. Through the application result, the method shows that it can obviously improve the efficiency and precision of data statistics. Based on the statistical data, case analysis is easily made by researchers and engineers to assess service safety and improve the design and maintenance strategy.
Complex Analysis of Plane Problem of Two-Dimensional Quasicrystals
Authors: Yang Lin , He Qin , Zhou Shu Yong , Li Wu
Published: November 2012

The fracture behavior of materials and structures are always caused by stress concentration near the defects in materials. This article describes the complex potential method for solving plane problems of quasicrystalline materials with defects. In order to prove effectiveness and success of the method, an example is given, and the results have very important significance in studying two-dimensional quasicrystals.
Position and Speed Detection of Synchronous Motor Rotor
Authors: Tao R.M. , Tao X. , Xiong C.R.
Published: November 2012

This article describes a method to detect the position and speed in a rotary transformer pole AC synchronous motor. This method gives the pole position and velocity signal demodulation circuit and analyses the demodulation principle. After practical testing, this approach is reliable with high detection accuracy. Therefore, it is fully able to meet the needs of CNC machine tools with high performance in AC server system.
Weighting-Grey Relative Degree Assessment Model of Concrete Structure Durability and its Application
Authors: Xue Peng Fei , Mao Da Ling
Published: November 2012

A grey relative degree assessment model for durability of concrete structure, based on the combinatorial weight, in which expert experience & information entropy are taken into account, is established after analyzing problems in existing durability assessment theory. Both the influence of subjective factors and the significance of objective factors are considered in this model, and to avoid assessment deviation for emphasizing one side or another. The model, which is testified by practical engineering example, provides a new approach to make durability assessment more scientifically and exactly.
Seismic Capacity of Reinforced Concrete Frame Strengthened with In-Filled Wall Using Embedded Form
Authors: Yoon Seung Joe , Seo Soo Yeon , Kim Chang Sik
Published: November 2012

This study includes the development of the seismic retrofit technology that structural frame of building is strengthened by installing additional wall with embedded form after demolition of the inner walls of unreinforced masonry wall including the exterior design walls. In addition, this paper involves the earthquake resistant performance evaluation of the system through an experimental work. From the test, it was turned out that as for the maximum strength of the specimens, the maximum load was similar regardless of whether using the embedded form. However, EF-IW-H1(embedded form) specimen with the form hardware embedded in the wall during retrofit resulted in ductile behavior of the, which shows the effect on the embedded form in a sense.
Theory and Methods on Tactics Generation of Extension Architectural Programming Facing to Artificial Intelligence
Authors: Lian Fei , Zou Guang Tian
Published: November 2012

Theories and methods of tactics generation are not developed as well as other aspects in Architectural Programming. Rules and methods of solving problems and innovating in the process of generating tactics are deficient. This research which proposes the theory and methods facing to intelligent tactics generation in Architectural Programming is an applying basic study on the intersection of Extenics, Architectural Programming, and Artificial Intelligence. It promotes the combination and application of Architecture, Extenics, and Artificial Intelligence. Moreover it promotes the creative thinking in Architecture to develop to the intelligent direction. At last it promotes a big progress on Computer Aided Architectural Programming.
Multivariate Poisson-Lognormal Regression for Crash Prediction of Different Types on Freeways Diverge Areas
Authors: Bai Lu , Fan Jing Jing
Published: November 2012

The primary objective of this study was to develop a multivariate Poisson-lognormal regression model (MVPLN) to evaluate the effects of contributing factors to crash frequency and to identify the correlations among different types. Crash data were collected at 282 exit-ramps on freeways in Florida, US.The Markov chain Monte Carlo (MCMC) method was used to get the solutions of the MVPLN model.The effects of crash-related factors of different types were explored in the MVPLN model considering the correlation structure.It was found thatmainline lane number was the contributing factor for both single-lane and two-lane exit ramp.
SiO2 Content Retrieving Based on ASTER and its Application in Metallogenic Prediction in Abra, Australian
Authors: Peng Guang Xiong , Wang Ming Yan , He Shu Yue , Shu Shu Lan
Published: November 2012

The remote sensing measurement of the surface SiO2content has important geological significance .An empirical formula for estimate SiO2content was established based on the correlation between ASTER thermal infrared data and tested Si element from NITON sites in Abra, Australia. The average error of estimated SiO2content is about 15%. ASTER silica alteration derived from SiO2content has good indicative function to find galena. Combined with other prospecting factors as bouger gravity, transient electromagnetic and so on, three vision prospecting targets were optimized, which need more exploration works.
Hydrogen Bonding Interaction between a Series of Bolaform Schiff Bases with Barbituric Acid by Spectra and HPLC
Authors: Jiao Ti Feng , Tong Qi , Liu Jian
Published: November 2012

In order to investigate the intermolecular hydrogen bonding of special amphiphiles, a series of bolaform amphiphilic Schiff bases (abbreviated as SCn) with different hydrophobic spacers were designed, and their interaction with barbituric acid were tested by spectra and liquid chromatography. The chromatographic properties showed that all the Schiff bases showed hydrogen bonding interaction with barbituric acid. In addition, the influence of various detectors was also studied on both cases. Experimental results show that the test with VWD detector showed better determination than FLD detector.
Design and Implementation of MIPS Simulator Oriented Memory Hierarchy Research
Authors: Yao Ying Biao , Zeng Xian Bin , Zhao Guang Pei
Published: November 2012

MIPS processor is widely used in embedded system, whose memory hierarchy has such an important effect on the performance and cost that how to design memory hierarchy rapidly is a key problem. To deal with the MIPS memory hierarchy research, we design a MIPS simulator “QtMips”. It is a GUI, Qt-based simulator for MIPS assembly language, which not only collects and analyzes real-time simulation information, but also supports fast memory configuration setting such as hierarchy setting, allocation setting, etc.
Related Technology Research on Navigation Electronic Map
Authors: Liu Lin , Li Wan Wu
Published: November 2012

The paper discusses the main difference between the navigation electronic map and the general electronic map, analyzes the structure of the navigation electronic map system from the function and constitution, discusses the domestic navigation electronic map on the main source of data as well as the acquire method, puts forward two navigation data updating methods: the version - incremental navigation data updating method and the push type service - online data dynamic updating method , offers the production process of navigation electronic map and looks ahead to the development trend of the domestic navigation electronic map.
Unmanned Aerial Vehicle Maritime Surveillance System of River Reservoir Area
Authors: Li Bo Wen , Lu Zhi Yong , Peng Xuan Kun , Peng Yu Qiong , Yi Jun Wei
Published: November 2012

At present, in the processing of ship hazardous chemical accident, rescuers get directly into the scene of the accident for information access, which threaten rescuers’ safety. In order to solve the disadvantages, this paper designs a remote control aircraft carrying camera into the scene. Through the remote control system, with the video image information collection, thereby avoiding the sampling personnel directly exposed to the dangerous chemicals accident condition, which reduce the risk of injuries.
Theoretical Analysis of Wavelength Conversion in Fiber Bragg Grating External Cavity Lasers
Authors: Wang Li Li , Qiu Xiang Yan
Published: November 2012

A new theoretical model for wavelength conversion based on XGM in fiber grating external cavity lasers is presented. The expression of mutual coupling parameter βm which indicates the efficiency of the wavelength conversion.was introduced in the model and and confirmed by numerical simulation. The theoretical analysis showed that the mutual coupling parameter βm is decided by intensity and frequency interval of CW light and the IM light, and the simulation results showed that the larger βm was, the better wavelength conversion was.
Research on Fast Capsule Image Segmentation Algorithm
Authors: Zhu Zheng Tao , Zhang Bo , Yang Gang
Published: November 2012

In on-line inspection for products based on machine vision, contrast between product defects and background is not always stable because of the discrepancy of environment where images are captured and the type, batch and innate structure of products to be detected. To perform accurate detection, image is usually divided into several parts which are of same gray value and later on sub-blocks the analysis for defected region where sudden gray value changes are occurring. The crucial step here is to have accurate regional image segmentation. Traditional edge detection is unlikely to ensure its accuracy, and at the same time, complicated image segmentation algorithms are time-consuming and cannot meet needs of real-time manufacturing. Images captured during on-line detection is relatively stable in structure. A new real-time image fast segmentation algorithm is proposed in this dissertation. This algorithm, combining with use of local image enhancement algorithm, morphological operation of simple structural operators and image thinning technology, can accurately find regions boundry of uniform region. Later, on-line image segmentation can be fulfilled by means of simple addition and subtraction for regions. This algorithm has been successfully applied to on-line capsule inspection. Experiments show that it can satisfy the need of on-line detection both with speed and accuracy.
Axial Compression Behaviors of Concrete Confined by Basalt Fiber Sheets
Authors: Deng Zong Cai , Raphael-Daud Jumbe , Xu Hai Bin
Published: November 2012

According to the axial compressive experiment of concrete cylindrical and quadrate specimens confined by Basalt fibers, the stress-strain curves, bearing capacity and peak strain were obtained. 12 quadrate and 12 cylindrical column specimens were prepared and wrapped with 2 to 4 layers of BFRP fibers. The results show that: (1) comparing with unconfined specimens, the compressive strength and peak strain of the specimens confined with Basalt fibers are improved significantly, not only cylindrical but also quadrate; (2) the compressive strength increases with the number of BFRP layers; with equal number of confinement layers, the compressive strength and peak strain of cylindrical specimens is higher than that of quadrate; (3) the wrapped fiber of quadrate specimens are more likely to rupture at the corners of specimen. Meanwhile, the compressive strength models of specimen confined by Basalt fibers were proposed, the theoretical values are in good agreement with the test data.
Discussion on Masonry Structure Model Mechanical Property Test
Authors: Chen Gong Lian , Si Lin Jun
Published: November 2012

The problems in the mechanical test of masonry structure model were discussed in this paper, including the masonry material, similar relationship, shaking table test device, judgment of wall cracking and number of cycles in pseudo-static loading test. The conclusions are: (1) for the masonry material mechanical test, usually the size decreased the strength increased, but if the laying method and appropriate adjustments in the process of the test mixture ratio, the size effect can be greatly reduced; (2) In the dynamic test of the masonry structure, for the gravity distortion model, the common way is the external prestressing method, but in this method the tension force is not constant, which is differ from the actual situation; (3) The wall cracking can be judged when the main tension crack of the wall appeared; (4) The loading cycle in the pseudo-static test of masonry wall would be twice.
Preparation of Ni-Nd2O3 Nanocomposite Coatings by Electrodeposition under Dual-Frequency Ultrasound
Authors: Ao Zheng Hong , Xue Yu Jun , Li Xian Hui , Li Ji Shun
Published: November 2012

The Ni-Nd2O3 nanocomposite coatings were prepared by electrodeposition under dual-frequency ultrasound(DU). The Nd2O3 content and surface morphology of Ni-Nd2O3 nanocomposite coatings were analyzed by scanning electron microscopy (SEM). The results showed that the Nd2O3 content of the nanocomposite coating prepared by electrodeposition using DU was high at 3.48% and the surface morphologies of DU nanocomposite coating showed better smooth surface, finer grain and more compact microstructure. A kind of method to prepare high quality Ni-Nd2O3 nanocomposite coating was obtained, which was: 40 g/L Nd2O3 nanoparticles, 45°C the temperature of electrolyte, 4A/dm2 cathode current density, 240W the power of bath-type ultrasound(BU), 100kHz the frequency of BU, 30W the power of probe-type ultrasound(PU), 20kHz the frequency of PU, and 1000r/min the stirring speed.
A Design of a Small Self-Propelled Mower by Building the Key Curves Based on the Internal Structure
Authors: Liu Sha , Wang Yun Qi , Wei Lei , Wang De Cheng
Published: November 2012

Based on the internal structure of a small self-propelled mower, extract key points and make the main outlines of the machine by connecting the points in four ways: straight lines connect, arcs connect, free curves connect and data fitting. Then start from the main outlines and make the morphological evolution by the rules of "tilt", "fillet" and the characteristic of curves to obtain lots of basic shapes of the machines. Choose and modify the shapes by a unified style to get the final design of the mower. The period of the R&D of the small self-propelled mower is shorten and the final design is simple and effective in line with the appearance needs of such kind of products. Moreover the final shells of the mower are better match with the structural components. That verifies the feasibility of the design method and its better effect.
Mechanical Properties and Dynamic Mechanical Behavior for Long Aramid Fiber Reinforced Impact Polypropylene Copolymer
Authors: Tan Hao , Tan Hong Sheng , Tang Xin Lei , Wang Yan Gang , Li Li Ping
Published: November 2012

Composites of continuous aramid fiber reinforced impact polypropylene copolymer (IPC) were prepared using a cross-head impregnation mold by self-design fixed on a single screw extruder, and pelleted by a pelleter for injection molding to prepare testing specimens. The mechanical properties of long aramid fibers reinforced impact polypropylene copolymer (IPC) composites were studied. Micrographs of fracture surface of tensile specimens and dynamic mechanical behavior for the composites were analyzed by scanning electron microscope (SEM) and dynamic mechanical analyzer (DMA). The results of experiments show that, the tensile and flexural strengths increased obviously with the aramid fibers content in the composites. SEM results show the compatibility between the aramid fiber and matrix is very poor. The results of the dynamic mechanical behavior of long aramid fibers reinforced IPC composites show that the composite deformation resistance and glass transition temperature increased evidently with the addition of aramid fibers.
Alignment of Carbon Nanotubes in Polystyrene Using Vibration and Electric Field
Authors: Xu Yan , Chen Wei , Yung Kai Leung
Published: November 2012

The most apparent advantages of thermoplastics are the recyclability and processibility. To obtain recyclable and injectable conductive polymer, this paper studied the filling of carbon nanotubes (CNT) in polystyrene(PS) and the aligning of CNT in PS under high frequency electric field and ultrasonic vibration using an experimental set up developed in our laboratory. Results of these studies would be very useful to the development of a new generation of micro fabrication method for producing integrated micro electronic products using micro injection molding that is the most cost effective way to produce micro products massively.
PID Control of Main Steam Temperature Used Quantum Particle Swarm Optimization
Authors: Nie Yan Min , Wang Tao , An Ying Bo
Published: November 2012

The main steam temperature is always an important indicator of the boiler operation quality, high or low will affect the quality of boiler operation. At first, introduce a algorithm PSO, which can used to optimize the PID parameters of a main steam temperature control system. Then, improved the PSO, and studied a kind of improved particle swarm algorithm—quantum apply quantum-behaved particle swarm optimization (QPSO). And this algorithm is used to optimize the PID parameters of a main steam temperature control system, got the best parameters. In the end, simulation result shows that, compared with basic particle swarm optimization (PSO),QPSO can make main steam temperature control system has a better control of quality, and improves the system of static and dynamic characteristics.
Study on Shift Schedule of Pure Electric Vehicles Automatic Transmission
Authors: Huang Kang , Yan Min Liang , Wang Zhao , Zhu Dan Dan
Published: November 2012

This paper puts forward a research design method of pure electric vehicle automatic transmission shift schedule based on the urban road conditions in connection with the problems of the low average speed, the high percentage of idle, and frequently shifting in pure electric vehicle. In order to improve the performance of pure electric vehicle automatic transmission and the using efficiency of the motor, this paper formulates a fuzzy shift schedule in the view of the economy. At the same time, this paper supplies a vehicle simulation in the view of economy through a application instance and the MATLAB / SIMULINK / ADVISOR software. The simulation results show that the fuzzy shift strategy can meet the requirements of the economy very well.
Low-Dimensional Approximation for Control of Spatio-Temporal Processes Using Principal Interaction Patterns
Authors: Cao Xiang Ping , Li Zhao Yang , Liu Mei Xing
Published: November 2012

Although the first-principal models of the spatio-temporal processes can accurately predict nonlinear and distributed dynamical behaviors, their infinite-dimensional nature does not allow their directly use. In this note, low-dimensional approximations for control of spatio-temporal processes using principal interaction patterns are constructed. Advanced model reduction approach based on spatial basis function expansion together with Galerkin method is used to obtain the low-dimensional approximation. Spatial structure called principal interaction patterns are extracted from the system according to a variational principle and used as basis functions in a Galerkin approximation. The simulations of the burgers equations has illustrated that low-dimensional approximation based on principal interaction patterns for spatio-temporal processes has smaller errors than more conventional approaches using Fourier modes or Empirical Eigenfunctions as basis functions.
Passivity-Based Tracking Control Design for Underactuated Mechanical Systems
Authors: Wu Shan Shan , Huo Wei
Published: November 2012

Passivity-based tracking control of the underactuated linear mechanical systems is investigated in this paper. As our main contribution, the matching condition is decreased into two equations and an adjustable gain (damping gain) is introduced into the controller by setting the desired closed-loop system properly. Stability of the closed-loop system is proved based on passivity of the system. Furthermore, as examples, tracking control of 2-DOF Acrobot and 2-DOF Pendubot are studied. The systems are linearized at their equilibriums and the passivity-based controller design method is applied to the linearized systems. Matching conditions are solved and the design procedures of associate controllers for the two robots are provided. The simulation results show that the designed controllers can realize asymptotical tracking for the given desired trajectories.
A Video Test Sequences Generation Way for Behavior Recognition Based on Cloud Model
Authors: Li Min , Wu Bin
Published: November 2012

Testing behavior recognition algorithm is a key technology of machine vision, tradition way to generate video test sequences has many defects, and a new way based on cloud model is putted forward. Moving object parameters such as moving types in image sequence were collected; these parameters were inputted into backward cloud generator. The quantitative representation of qualitative concept, expectation Ex,entropy En, super entropy He were gotten. These parameters were used to simulate the moving object behavior representation parameters. Ex, En, He were inputted into normal cloud generator, every moving object was designed as agent, agent can adjust behavior parameters by feeling environment and auto excitation. These behavior parameters were used to evaluate some classics algorithm. The experiment show that: the time cost of new way is 10% of tradition way, and two methods have same effect on testing algorithm recognition rate and algorithm recognition speed, and new way is superior to tradition way on testing algorithm robustness.
A New Way of Ultra-Wideband Channel Estimation Based on Bayesian Compressive Sensing
Authors: Li Fen Lan , Wen Hua , Zhuang Zhe Min
Published: November 2012

In this paper, in order to solve the problem that the sampling rate in ultra-wideband (UWB) channel estimation is too high, we discuss the applicability of Bayesian Compressive Sensing (BCS) used in UWB channel estimation. We solve the problem by using the time domain sparse of the impulse response of the UWB channel and establishing the probability model of the Compressive Sensing (CS) measurement. We accomplish the channel estimation by optimizing maximum a posteriori (MAP) of the channel. The simulation results show that the proposed scheme needs a very low sampling rate to recover the channel accurately. And the BCS algorithm has a better performance than the basis pursuit (BP) algorithm and the traditional least square (LS) algorithm in bit error rate (BER).
Design of the Advanced Automatic Door Controller Based on PLC
Authors: Zhang Ying , Yang Pu Qiong , Yuan Feng Wei , Hu Yu Rong
Published: November 2012

In order to enhance the reliability of the automatic door operation, S7-200 programmable logic controller (PLC) was used as the core of the automatic door system. The principle of control system was analyzed with description of the control system hardware. It was introduced that the working process of control circuits about human body detection sensor and automatic door position detection and obstacle detection and so on. It was introduced how to choose a PLC type, to really settle the I/O orders. Combining the operation characteristics of programmable controller, a reasonable optimization was made for the work flow of the system. On this basis, using structured programming method, the program flow charts of main program module was developed. The debugging of the control system was developed on simulation software. The practical application shows that the control system was good and reliable.
USB Flash Disk Recorder Based on STM32
Authors: Ou Guang Yu , Pan Xing , Pan Yong , Gao Yi
Published: November 2012

USB flash disk recorder is a new type paperless data recorder, which gathers the USB flash disk technology, micro-processing technology, and digital sensor technology together, taking the lead in applying USB flash disk technology. Massive data storage demand is met by adopting FatFS file system to manage storage media. The entire data will be stored in the form of file so that it is convenient for data storage and transmission. Moreover, the system concerned with the bad block management problems in NandFlash will be optimized and thus the reliability of the system will also improve. System test is performed by the accelerometer sensor. It is able to make long-term monitoring on the shock intensity and record the shock peak and waveform.
The Simulation of the UAV Collision Avoidance Based on the Artificial Potential Field Method
Authors: Liu Jian Ying , Guo Zi Qi , Liu Shi Yue
Published: November 2012

To deal with dynamic path planning of unmanned aerial vehicles(uav) in the complicated 3-D environment, a new method that combines the Lyapunov theorem with the artificial potential is proposed. The mission region is described as the artificial potential field. In this paper, it proves that the balance point is a saddle point, only when uav reaches the target, the balance point is stable, the rest of the balance point are divergent, so uav can escape the minimum point as soon as possible. The simulation results show that this proposed method can effectively make uav avoid collision, and escape well the local minimum value point. The optimization results are better than the simplex artificial potential field, and have better optimization precision and tracing speed.
Design of Wireless Temperature Measurement System for High Voltage Electrical Equipment
Authors: Cao Xiang Hong , Yang Chao , Zhang Hua
Published: November 2012

There are many limits in the traditional temperature measurement methods' for high voltage electrical equipment. A wireless temperature measurement system based on C8051F340 for high voltage electrical equipment has been designed, which transfers temperature data by wireless communication, and optimizes the system's power supply for the high voltage electrical equipment's working environment. The host computer of the system analysis the temperature data from wireless sensor and can prevent the equipment's overheat accidents in effect. According to the experiment board's practical operating, this system measures temperature accurately, transfers data stably, operates with a reliable power supply and can meet the practical requirements.
Sliding Mode Control of Pendulum-Driven Spherical Robots
Authors: Yu Tao , Sun Han Xu , Jia Qing Xuan , Zhang Yan Heng , Zhao Wei
Published: November 2012

In this paper, the dynamics and control aspects of longitudinal motion of pendulum-driven spherical robots are investigated. A simplified dynamic model is established for a spherical robot, which is an underactuated mechanical system. Based on this dynamic model, a hierarchical sliding mode controller is proposed. The stability of the whole system is verified through Lyapunov analysis, and the asymptotic stability of the sub-sliding surfaces is proved with mathematical techniques. The validity of the proposed controller is illustrated through a simulation study.
Wiener Filter Based on the Image to Blur
Authors: Chen Chao Da , Zhang Si Qing , Chen Chui Xin
Published: November 2012

Image restoration, refers to the removal or loss in the process of getting digital image degradation of the image quality, image restoration technology is the key to meet the requirements of the point spread function, degradation model is an ill-posed integral equations, in the frequency domain, when H ( U, V ) less or equal to zero, the noise will be amplified, the degraded image and interference in H ( U, V ) value of the spectrum will be small to restore the image influence. In view of the point spread function put forward Wiener filtering algorithm, the noise lead to ill-posed integral with specified signal-to-noise ratio to reduce image restoration effects, through the IPT toolbox for fuzzy image restoration, image quality to achieve the anticipated effect.
Radiation Resistance Experiments of Image Sensor and Acoustic Sensor
Authors: Yuan Feng Wei , Deng Qian , Zhao Li Hong
Published: November 2012

With the development of the nuclear power and the requirement of the nuclear power equipments’ automation, the fault diagnosis system needs to vibration, noise, temperature and other signals generated by the sensor acquisition system under test. Monitoring technology in high radiation environment is very different from traditional monitoring technology, there is a high radiation resistant performance to sensors, amplifying circuit and transmission cable. The project group preliminary study results show that using sound detection method for real-time video monitoring to get more equipment operating information. According to the research in radiation effect of semiconductor devices and comparison experiment, radiation resistant performance of moving-coil acoustic sensor is above CMOS image sensor several orders of magnitude. This provides a powerful hardware support to it that fault diagnosis method based on capturing the audio signal while the nuclear facilities are operating is proposed.
Position Tracking Control for Water Hydraulic Vane Actuator
Authors: Yang Yong , Zeng Zhi Gang
Published: November 2012

The control of the water hydraulic vane actuator has direct influences on the performance of the water hydraulic system. In the paper, a variable structure control (VSC) has been proposed and applied to the position tracking control of a water hydraulic rotary actuator. Based on the model of the water hydraulic vane actuator, simulation experiments and comparisons have been done with VSC controller and PID controller, respectively. Simulation experiment results show that in position tracking control applications, the use of VSC as the controller of the system is able to improve the position tracking performance of the system. Especially, the VSC system provides stronger robustness to different reference inputs than the PID control system. The position tracking control properties of the water hydraulic rotary actuator validate the effectiveness of the proposed VSC.
Design and Characteristic Analysis of Variable Speed Hydraulic System
Authors: Zhou Yi Jun , Xu Jun
Published: November 2012

The motor variable frequency speed control technology applied to the traditional hydraulic system based on variable speed hydraulic transmission principle with The PLC technology, hydraulic control, detection technology and configuration of organic, it combine PLC as the core of the lower machine control components, PC as the control, researched the variable speed hydraulic test system hardware, software and control systems design. The experiments were performed, realized the variable speed hydraulic experimental platform for open loop control and variable speed hydraulic system parameters real-time monitoring and dynamic display. It overcomes some of the shortcomings of the conventional hydraulic system, improved the efficiency, the hydraulic system run more smoothly and reduce noise. The experiments show that the variable speed hydraulic test bench run well and achieve the purpose.
Conceptual Design of Controllable Soft Start Device with Differential Planetary Gear-Trains
Authors: Han Jing , Liu Hun Ju
Published: November 2012

This paper presents a new driving system for realize the function of soft-starting and soft-stopping of belt conveyor. This device consists of planetary gear box, tow motors and controlling system. The basic concept is to combine differential planetary gear trains and converter technique. So, by controlling the angular velocity of inner gear the belt conveyor can realize the function of soft-starting and soft-stopping. During the working period this system has four different modes. By means of components libraries and virtual assembly the virtual model of CCSD is obtained. The kinematical and dynamic simulations are performed. By analysis the resisting force of belt conveyor we can obtain the curve of output-load properties of the controllable soft start equipment. As a result the dynamic force, the torque of each constrain, the ideal power of controlling motor, the ratio of main motor and controlling one were obtained.