bluuebunny/crossref_metadata_2025 huggingface dataset:
Design and Development of Vehicle License Plate Recognition (VLPR) System to Improve Parking Lot Management
Authors: Chen Yong , Hu Bin , Li Bo , He Qing , Mo Hong , Xiong Gang
Published: September 2013

In this paper, we design and develop Vehicle License Plate Recognition (VLPR) System, which is one part of comprehensive video management platform for parking lot. Combined with intelligent video analysis module, the proposed VLPR system can not only capture the license plates of those vehicles through ENTRANCE and EXIT of parking lot, but also recognize the contents of the captured license plates. In addition, the driver and passenger in the front row of the vehicle can be captured too. The capture subsystem operates well on embedded Linux environment running on Hi3516 SoC chip, and test results of the VLPR system meet the requirements of accuracy and real-time field applications. The VLPR system is easy to expand and modified for other Management Information System to realize functions like personnel management, vehicle tracking, and more automatic and intelligent functions of parking lot management.
Comparison of Linear Switched Flux Permanent Magnet Machines
Authors: Zhou Y.J. , Zhu Z.Q. , Nilssen Robert
Published: September 2013

This paper proposes a linear sandwiched switched flux permanent magnet (LSSFPM) machine and two double-sided linear switched flux permanent magnet (LSFPM) machines havingtoroidal windings. Bothmachines are optimized and then compared with the conventional 6-slot/5-pole LSFPM machine. It is found that the proposed machines exhibithigher magnet usage efficiencies than the conventional LSFPM machine, and the double-sided machines show shorter end-windings, which are benefited from toroidal windings. The performance, including back-EMF, cogging force and average thrust force, are analyzedby two-dimensional (2-D) finite element analysis (FEA).
Anti-Print and Scan Halftone Watermarking Algorithm Based on Edge Detection
Authors: Ai Hua Wen , Liu Ping Feng , Dong Sheng Cong
Published: September 2013

In order to resist print and scan attacks, a kind of digital halftone image watermarking algorithm is proposed, which is based on the edge detection and improved error diffusion. The edge of gray image is gotten using canny detection. Calculate the noise visibility function values of the edge points. Then, sort the values in ascending order and select the size that equal to the length of watermark as the location of watermark embedding. While the grayscale image turns to halftone image using the improved error diffusion algorithm, binary watermark is embedded in the edge position. Watermark is pretreated with Arnold before embedding to improve the safety of watermark. Experiment results show that the algorithm is good resistance to print and scan attacks, while resistance to shearing, noise and jpeg compression attacks.
Analysis on the Application the of Ultrasonic Technology in the Medical Field
Authors: Jiang Hong Yan , Shi Jing Lu
Published: September 2013

Ultrasound imaging, as one of the four most important medical imaging technologies (ultrasound, CT, MRI, and isotope scanning), has become an indispensable important part of the clinical medicine after the development of more than half a century. Medical ultrasound imaging, by relying on its advantages such as real-time, nondestructive, no radiation, and cheap price, has constantly received attention from people. More accurate diagnosis and treatment, and more authoritative protection are continuously provided by the medical ultrasound imaging technology for clinical diseases. In this paper, starting from the basic ultrasonic wave, the application of ultrasound in medicine, medical ultrasonic imaging technology and classification, and the current ultrasonic equipments applied in medical imaging are introduced. The medical equipment use units and personnel can provide better health service for human beings as long as the equipments are better known and utilized.Ultrasonic and its application in medicine
The Virtual Endoscope of Neurosurgery Used for Transnasal Approach
Authors: Mo Jun Cong , Yao De Min
Published: September 2013

This paper presents and implements an automatic roaming and fast virtual endoscopic neurosurgery system for transsexual approach, which can be compatible with the fiber-optic endoscopic transnasal approach in the skull base surgery, and accurately locate the position and their mutual relations among the lesions, tumors and surrounding vital anatomical structures. The system uses a multithreaded RayCasting volume-rendering algorithm based on the graphics processor (GPU). It reconstructs the nasal three-dimensional structure in the skull base surgery, and optimizes the centerline extraction that can be carried out automatically. In real-time display, it improves the translucent rendering optical model, taking into account lighting model important parameter - the image gradient translucent degree of non-linear effects, and can fully display the skull surface and internal implied the interface and internal details.
A New Class of Biased Estimate
Authors: Ma Chao Zhong , Du Yuan Lu , Gui Qing Ming , Gu Yong Wei , Fu Ji
Published: September 2013

In this paper, the GM estimation is integrated with ridge estimation, principal component estimation and LIU estimation, resulting in a new class of robust unbiased estimation, and given the appropriate method of calculating. The example shows that such a new biased estimate is not only resistant to the interference of design matrix multicollinearity, but also withstands the adverse effects of outliers and high leverage points. They are really better than the LS estimation, unbiased estimation, robust M estimation and robust M-type biased estimation.
Performance Comparison between Surface-Mounted and Interior Brushless DC Motor
Authors: Zhao Nan Nan , Yang Qian , Zhang Ming Hui , Liu Wei Guo
Published: September 2013

In this paper, the cogging torque, airgap flux density, back-emf, and losses of a surface-mounted and a hybrid magnetization interior brushless machines with the same stator, airgap width, armature core length, material, permanent magnet consumption, speed and copper loss are compared. The analysis reveals that the loss in rotor back iron of interior motor is higher than that in surface-mounted motor due to the skin effect while the eddy current losses in sleeve and magnets of surface-mounted motor are significant, causing the total losses of surface-mounted motor are higher than that of interior motor.
Study on the Application of UWB Positioning Technology in Multiplayer Mechanical Motion Capture System
Authors: Shi Guang Tian , Li Shuai
Published: September 2013

Because the mechanical motion capture system can only capture the motion data of the human body and it can`t achieve the positioning function in three-dimensional space, therefore, it is only suitable for capturing just one person's motion data. This paper will introduce the UWB positioning technology to the multiplayer mechanical motion capture system, the system through the mechanical motion capture technology to get the motion data of performers and using UWB positioning technique to obtain the coordinate data of each performer, then through the integration and calculation of the above two kinds of data, the system will acquire the complete motion data of each performer.
The Design and Simulation of DDS Based on Multisim and C51
Authors: Ma Jie
Published: September 2013

In order to facilitate intuitive and understanding of the frequency synthesizer technology, research on direct digital frequency synthesizer by the phase accumulator , waveform storage ROM, the D/ Aconverter and low-pass filter modules .Multisim provides powerful virtual electronic platform, realize DDS synthetic sine wave design and circuit simulation by C51 MCU control center, while providing key code. By adjustingthe reference clock frequency fc, or to adjust the frequency control word K, can be clearly seen of the frequency of the synthesized sine wave will be changed.
Modeling and Case Study of the Production Line Layout System
Authors: Zhao Yong , Pan Xiao Yong , Li Chun Chuan
Published: September 2013

A study on production line layout problem indicates there is a lack of research on the production line design issue. Traditional methodology on this problem mainly depends on the designers experience and calls for theory analysis and quantitative study. To control the cost and optimize the resource utilization of enterprises, this paper develops a multi-stage integer programming model to describe the production line layout problem, and proposes a heuristic algorithm to solve the problem. A practical example illustrates the effectiveness of the model.
Application of the Gaussian Shaping Filter Technique on SoPC
Authors: Zeng Chen Hao , Fang Zong Liang , Feng Xiao Jie , Zhang Nan , Qin Bing , Duan Zhong Shan
Published: September 2013

This paper is based on wavelet analysis. Focusing on nuclear pulse, take Gaussian Shaping Filter (GSF) Technique into practice on SoPC. Validate the feasibility of Gaussian shaping filter with MATLAB. According to the development environment requirements of SoPC, carry out an adjusted algorithm on SoPC. The experiment indicates that the integration between GSF technique and SoPC technique can extract the information of peak value and time in effect and makes further good foundation for the realization of multi-channel system on SoPC.
Characteristic Analysis of Permanent Magnet Linear Synchronous Motor for Rope-Less Hoist System
Authors: Feng Hai Chao , Wang Xu Dong , Xu Bao Yu , Xu Xiao Zhuo
Published: September 2013

Permanent magnet linear synchronous motors (PMLSMs) is the best driving motor for rope-less hoist system because of the advantages of simple structure, small volume, high force, unlimited hoisting height and speed. In this paper, the finite element method (FEM) is adopted to design a PMLSM with 16-pole 15-slot as a unit for rope-less hoist system. Through the FEM analysis, the EMF constant Ke and the force constant Kf of unit motor were got. Then a direct driving elevator prototype drove by the proposed PMLSM was built. Experimental results show the stable operation performance of the experimental device, having good prospects for the development and application.
The Research of WSE-Based on Web Services Security
Authors: Hu An Ming
Published: September 2013

WebService is a service oriented architecture technology, application services to support different platform interactive operation. Although can use the open XML standards to publish, coordination and configure the web application, there are practical problems to be solved on the Web Services in both technology and application level. WebService based on the SOAP data exchange protocol and HTTP communication protocol , Its security is one of the practical considerations, This paper discusses how to build secure WebService access from the control point of access model strategy, implementation of WebService security communication.
Research on DEM Construction Method of Interpolation
Authors: Yang Shi Qing , Miao Lan Fang
Published: September 2013

DEM construction quality directly affects a variety of applications based on DEM and terrain analysis. Giving the error in measured data, interpolation methods affect the quality of DEM. Therefore, for a certain district, choosing a better interpolation method is very important. In this paper, we constructed new DEM by three interpolation methods (inverse distance weight, spline, Kriging) on the real DEM data of loess tableland. By comparing this new DEM with the original DEM and analyzing this new DEM, we can get a better choice of interpolation for DEM construction and terrain analysis for a certain district.
Improving the Performance of RFID Tag Anti-Collision for Capture Effect
Authors: Yang Xi , Wu Hai Feng , Tan Yuan , Lin Ran Qing
Published: September 2013

Capture effect is very common in wireless communication systems. If the capture effect was properly used, it will enhance the systems identification efficiency. We proposed a capture-aware tag estimation algorithm based on Maximum a Posterior Probability (MAP) estimation, which estimates the tag number and the capture effect by searching for the values of tag number and capture probability in their hunting zone jointly, that maximizing the posterior probability. Then reset the frame length given by the optimal frame equation under capture effect. Compared with the traditional MAP estimation, i.e. the estimation of tag number without capture effect, the estimated error of the proposed method is lower and the system identification efficient of the proposed algorithm is higher, also much closer to the ideal efficiency.
Analysis on the Mass Concrete Test and Application in Stadium Project
Authors: Xu Chun Hong , Jing Zhan Fu
Published: September 2013

Mass concrete technology has been widely used in the construction field. In engineering construction, the quality and construction technology of mass concrete are directly related to the quality of the projects. Thus, before the construction of mass concrete, a series of experiments should be made, and also the key points of the construction technology should be strictly followed in the construction process. In this paper, by taking the application of mass concrete in stadium project as an example, the test before the construction of mass concrete and the technical application in the construction are analyzed.
Study on the Construction Technology of the Graded Granular Cushion at the Bottom of the Subgrade in Highway Engineering
Authors: Li Cheng , Li Hao Xuan , Zuo Mu Zi
Published: September 2013

Since the 21st century, the national economy of China has tended to fast develop, and the people's material life has been greatly improved. As the investment of the state in social infrastructure continues to increase, the domestic infrastructure construction has been in a rapid development, and especially the road and bridge construction projects have largely accelerated the development of the transportation and also the growth of the national economy in China. In the meantime, the geological conditions encountered in highway engineering are more and more complicated, so the requirement on the construction technology is continuously higher and higher, and finally certain difficulties are caused to the construction. In this paper, the construction technology of the graded granular cushion at the bottom of the subgrade in highway engineering is studied and discussed specifically.
Study on the Evolution Mathematical Model for the Downstream Riverbed of Water Conservancy Hub Project
Authors: Tian Xue Quan
Published: September 2013

In water conservancy hub projects, an analysis of the downstream river channel evolution is a very important management reference. Through the construction of the mathematical model for riverbed evolution and also using all original parameters, the evolution trend of river channel can be simulated, providing an important reference for management and maintenance, and also proving the deduction of the mathematical model can keep consistent with the actual trend.
Discussion on the Application of the Concrete-Filled Steel Tube in Civil Engineering
Authors: Zhao Chao
Published: September 2013

Concrete-filled steel tube, as a main bearing component, can be temporarily used as the building support of other components. In this paper, the key and difficult points in the construction of concrete-filled steel tube in underground civil engineering, how to use the key technologies in the construction process, and the quality control problems and development prospects are mainly introduced.
Application of Key Technologies of Expansion Pipe in Oil and Gas Well Project
Authors: Wang Yan
Published: September 2013

As an emerging technology in the field of oil and gas well project, oil and gas well expansion pipe could maximally reduce the hole size decrease resulting from reduced catheter column of the wellbore, so as to achieve the purpose of saving costs. Meanwhile, this technology brings good news to Nerve well drilling in complicated geological condition and improvement of well structure. This article starts from the working principles of expansion pipe, and puts emphasis on the key technologies of expansion pipe and gives a detailed analysis of the application of expansion pipe technology.
Optimization on Supply Chain Network Based on High-Tech Products Life Cycle
Authors: Zhang Lei , Kong Yan Yan
Published: September 2013

In view of the characteristics of market demands of high-tech products life cycle at all stages, the response time model of the products life cycle at all stages was established according to the differences of products stage response points. Based on this, the production cost/time, transportation cost/time, shortage cost, sales price, and other factors of the products life cycle at all stages were taken into consideration. The 0-1 mixed integer optimization model of multi-factory and multi-distribution center with profit maximization as the optimization objective was established. Particle Swarm Optimization (PSO) algorithm was used to solve the decision variables. Finally, a numerical example was used to illustrate the practical application value of this model.
Research on Integration of Information Flow and Logistics in VMI Based on TPL
Authors: Gao Lian Zhou
Published: September 2013

The paper reviewed the relevant literature and research and summarized on VMI, inventory control and transportation scheduling theory ,VMI mode integrated inventory and transportation problem is analyzed theoretically the internal driving force and necessity and insufficiency of the supplier's logistics capabilities and information capabilities.from the systemic view,this dissertation deeply analyzed the information flow and logistics integration in VMI&TPL mode and achieved the predicted research objectives.
Research on Inventory and Transport in VMI Mode
Authors: Che Xiao Ying
Published: September 2013

This paper firstly analyzes the information flow and logistics factors and establish an integrated information flow based on interface and general framework of logistics integration model , to build VMI & TPL mode integrated information flow and logistics system dynamics model. From logistics integrated subsystems, information flow integrated subsystems, coordination and control subsystem and risk analysis information flow and logistics subsystem integrated system architecture, and analyze various subsystems within the relationship between the various factors, we come to each subsystem causal diagram. Thus establishing an integrated information flow and logistics system model Article demonstrates the implementation of VMI supply chain model brings improvement in the overall economic effect, get a lot of useful conclusions with a wide range of uses.
Development of a Segmented Linear Variable Flux Reluctance Motor with DC-Field Coil
Authors: Wu Di , Zhu Z.Q. , Nilssen Robert
Published: September 2013

This paper proposes a new type of linear motor based on the concept of variable flux reluctance motor (VFRM). By adopting segmented primary stator, the segmented linear VFRM (SLVFRM) can eliminate asymmetry between phases due to end-effect. Meanwhile, multi-phase SLVFRM of any number of phases can be obtained by adjusting number of segments directly. The stator/mover tooth pitch combination and segments arrangement rules are also illustrated. An optimized 3-phase SLVFRM is analyzed by finite element analysis, with focus on characteristics such as cogging force, back-EMF and winding inductances. Further, both brushless AC (BLAC) and brushless DC (BLDC) drive for SLVFRM are investigated. Besides much smaller force ripple, BLDC drive can obtain higher average force at same RMS current due to trapezoidal back-EMF. The force characteristicwith variousAC and DC currents and current angles are also investigated in the paper, and it shows that SLVFRM has negligible reluctance force while keeping the same AC and DC currents is optimal for maximum efficiency operation under a fixed copper loss.
The Managing and Analysis of Data Information in Monitoring the Passenger Flow
Authors: Ji Xiao Yu , He Jie , Peng Jin Hu
Published: September 2013

Passenger flow is the circulating with purpose which is formed by human beings who want to achieve all kinds of trip activities through the help of various transportations. It is an important studying content in controlling the city traffic as well. As for the necessary monitoring of passenger flow, the primary condition is grasping the precise passenger flow data and mapping out an effective monitoring plan based on the facts and data. The paper first introduced the necessarily in monitoring and the appliance of usual calculating method of passenger flow. Based on this, the paper also put forward the managing and analysis of data information in the calculating methods of passenger flow monitoring, which is hoped to be helpful in the future research.
Recognition of Mechanical and Electrical Accessories in Monitoring Equipment in Nursing Work
Authors: Liu Yong Rui
Published: September 2013

The monitor accessories are of vital importance to determine whether monitors could accurately display real-time data, which has a direct impact on the correct diagnosis of clinical personnel. The author has engaged in nursing work for more than a decade, and is now Director of Nursing Department, fully aware of the importance of care for patients at all times in nursing. A great many medical problems now in particular make me feel a great sense of responsibility. Mindray care accounts for more than 80% of the total care in this hospital. With the example of Mindray care accessories, it gives an introduction of the way to recognize accessories to assist clinical in judging whether monitor accessories are genuine; in case of the current use speed of administrative office in using accessories, it generally needs to reserve a certain amount of dynamic volume. Reserve standard of nursing work in our hospital is basically to utilize consumption material numbering date combined with recipient date to determine accessories warranty period and give full play to the equipment, so as to make our clinical nursing work better.
Design and Development of the Enterprise Asset Management System Based on EAM
Authors: He Guo Xiang
Published: September 2013

The paper describe the EAM function by proposing the main modules and major business processes, abstracting the main business processes.it implements preventive maintenance of assets, assets track, the whole process of life-cycle management based on the equipment,asset account and treat management maintenance as the core, the submission, approval,implementation of work order as main line. EAM can effectively improve the efficiency of equipment maintenance, reduce maintenance and repair costs, improve asset reliability and value.
An Optimal Method for Minimizing Cogging Torque in Disc-Type Permanent Magnet Machines Using FEM and Genetic Algorithm
Authors: Shangguan Jing Shi , Fan Cheng Zhi
Published: September 2013

Cogging torque is one of the main reasons which cause ripple in motor's speed and torque. So the reduction of cogging torque must be considered in the design of permanent magnet machines. There are many existing techniques for reducing cogging torque in PM machines. This paper presents a new optimal method for cogging torque minimization by magnet shifting in disc-type PM machines. The impact of magnet shifting on cogging torque and torque output are discussed in disc-type PM machines. In order to reduce the cogging torque effectively while without being harmful to the average torque output. This paper used genetic algorithm (GA) to calculate the shift positions combined with slot-opening optimization to achieve the minimum cogging torque.
Research on the Unit Commitment of Thermal Power Plant Based on Genetic Algorithm
Authors: Liu Xing
Published: September 2013

This paper, focusing on the practical moving condition of the thermal power plants, studied in detail that how to did the curve fitting according to the units data collected from Tianjin Dagang Power Plant; studied the each fuel loss in the process of start-stop the units and their calculation methods; and put forward that fuel consumption and life expenditure while starting and stopping the units should be considered when using peak-load regulation; worked out the GA program and proved GAs accuracy and superiority through the calculation examples, and showed that GA had great practical and research meaning.
The Edge-Balanced Index Set of Power-Cycle Nested Graph C6m × Pm6
Authors: Zheng Yu Ge , Zhang Qing Wen
Published: September 2013

Based on the research of Power-cycle Nested Graph, the decomposition method of single point sector has come up. By the use of the process of clawed nested-cycle graph and nested-cycle sub-graph, the edge-balanced index sets of the power-cycle nested graphare solved whenand. Besides, the constructive proofs of the computational formulas are also completed.
Electromagnetic Design of a New Electromagnetic Planetary-Gear Machine
Authors: Zheng Ping , Bai Jin Gang , Tong Cheng De , Sui Yi , Song Zhi Yi
Published: September 2013

A novel brushless compound-structure permanent-magnet synchronous machine (CS-PMSM) based on the magnetic field modulation principle is proposed for hybrid electric vehicles. As the key part of the brushless CS-PMSM, the operation principle of the electromagnetic planetary-gear machine (EPGM) is investigated by analytical method. The magnetic-field distribution and torque performance of the EPGM are studied by finite-element method (FEM). To obtain the optimal design scheme, the influence of the span ratio and thickness of the magnetic block and the slot-opening on the electromagnetic performance is investigated. Finally, the core loss distribution of the EPGM is investigated and the performance of this machine is fully evaluated.
Design and Analysis of a Novel 2-D Permanent Magnet Array for Planar Actuator
Authors: Guo Liang , Ding Hao
Published: September 2013

A novel 2-D permanent magnet array for a planar actuator was proposed, in which the portion between adjacent magnetic poles was divided to four small rectangular solids. Magnetic fields of the permanent magnet array were analyzed systematically by 3D finite element method. The analysis results show that, compared with the well-known Halbach magnet array, the proposed array has higher permanent magnet utilization. Keeping the whole permanent magnet volume constant, the arrays with several improved structures were put forward. The magnetic field analyze results prove that the utilization is best, when the ratio between the height of the magnetic poles magnetized vertically and the height of the portion magnetized horizontally is about 2.
The use of Quadrature Axis Flux Barriers in Linear Synchronous Machines
Authors: Cox T. , Proverbs S.J.O. , Eastham J.F.
Published: September 2013

The paper explores the use of quadrature axis flux barriers in planar linear synchronous motors. It is shown that the use of the barriers produces a decrease in the flux driven by the armature windings. This leads to a reduction in the tendency for de-magnetisation of the magnets and improved power factor with only a minor reduction in the force. A simple analysis is developed to enable broad assessments of the flux barrier effects and this is validated by the use of 2D finite element analysis in a time stepping routine. The simple analysis is used to consider machines of three different pole pitches with a range of quadrature axis gap dimensions. The braking force produced in short circuit conditions is important in some applications and it is shown that the use of flux barriers gives enhanced forces.
Cogging Force Reduction of Permanent Magnet Single-Phase Linear Generator Applied in Wave Energy Conversion System
Authors: Zhang Jing , Yu Hai Tao , Hu Min Qiang , Chen Qi , Huang Lei
Published: September 2013

This paper proposes a permanent magnet single-phase linear generator (PMSPLG) with Halbach PM Array applied in wave energy conversion system and illustrates how the parameter changes in the geometry of permanent magnet and slot affect the cogging force of the generator. Moreover, the cogging force analysis method in PMSPLG is improved based on the cogging torque analysis method of permanent magnet synchronous rotation machine. Due to experiment results of prototype concordant with the analysis results of the analytical method and the finite-element method, the proposed model and analytical method are correct and effective.
Synthetic Boundary Conditions for Analytical Magnetic Field Analysis of Halbach Magnet Arrays
Authors: Lin He Yun , Jin Ping , Fang Shu Hua
Published: September 2013

This paper presents a kind of synthetic boundary conditions for the analytical magnetic field analysis of Halbach magnet array, which are derived from the linear demagnetization characteristic and the equivalent surface current of permanent magnet (PM). With the proposed synthetic boundary conditions, boundaries of Halbach PM array are simplified to only two surfaces. As a result, a relatively simple analytical solutions of Halbach magnetization topology based on the magnetic scalar potential (MSP) are obtained.
Quantitative Comparison of Linear Magnetic Gear with Different Types of PMs
Authors: Chen Mu , Chau K.T. , Li Wen Long , Liu Chun Hua
Published: September 2013

This paper presents a quantitative comparison between the non-rare-earth permanent magnet (PM) and rare-earth PM based linear magnetic gear. By using the finite element analysis, three linear magnetic gears adopting either the non-rare-earth PM or rare-earth PM are analyzed and discussed. Hence, the cost-effectiveness comparison among different types of PMs is conducted. The results indicate that the non-rare-earth PM is preferred to the rare-earth PM for application to linear magnetic gears when cost-effectiveness is emphasized.
Multiobjective Design Optimization of Ironless Permanent Magnet Linear Synchronous Motors for Improved Thrust and Reduced Thrust Ripple
Authors: Li Li Yi , Tang Yong Bin , Liu Jia Xi
Published: September 2013

In order to achieve high thrust density and low thrust ripple simultaneously, a multiobjective optimization design method is applied to ironless permanent magnet linear synchronous motor with non-overlapping windings. On the basis of the magnetic field analysis model, the analytical formulae of key parameters such as No-load back EMF, thrust per copper quality and thrust ripple was deduced. Further, a multiobjective optimization is carried out by genetic algorithm to search for the optimal design variables. The design optimization is verified by 2-D Finite Element analysis and experimental results of the prototype.
Magnetic Shielding for Coreless Linear Permanent Magnet Motors
Authors: Pluk K.J.W. , Jansen J.W. , Lomonova E.A.
Published: September 2013

This paper concerns the local reduction of the magnetic flux density by means of magnetic shielding. Using a spatial frequency description, a 2-D semi-analytical periodic model is obtained for a coreless single-sided linear permanent magnet motor. The magnetic shield is included in the modeling using mode-matching. The obtained magnetic flux density is compared to a finite element model and is verified with measurements. The results show a reasonable agreement between the semi-analytical model and the measurements. Some large deviations occur due to the modeling assumption that the shield has a linear permeability, while the used shields are saturated. However, the semi-analytical modeling method is accurate enough for design purposes and initial calculations, especially when being aware of the possible saturation of the shield.
Design and Control of a Magnetically Suspended Ceiling Actuator with Infinite Planar Stroke
Authors: Overboom T.T. , Smeets J.P.C. , Jansen J.W. , Lomonova E.A.
Published: September 2013

This paper presents the design and control of a magnetically suspended ceiling actuator which combines four iron-cored linear actuators and a checkerboard permanent magnet array for an infinite planar stroke. When the actuators are rotated with respect to the PM array, it is shown that the thrust and normal force produced by the three-phase linear actuators can be controlled by applying Park's transformation. The design of the iron-cored linear actuators is optimized for minimum losses when the translator inside the ceiling actuator and a payload are accelerated in the xy-plane. The optimization is performed using an analytical model is. Simulations of the optimized design with a 3D FE-model, show a maximum tracking error of 1 μm and rotations of 30 μrad when the translator is moved and controlled in 6 DOF.
The Highest Efficiency Control of the Stirling Linear Generator
Authors: Zhang Hai Lin , Kou Bao Quan , Zhou Shou Ming , Li Li Yi , Zhang Chao Ning
Published: September 2013

A high efficient current control strategy of the Stirling linear generators was investigated in this paper. The structure of the linear generator was introduced and mathematical model was built. The efficiency of the system is compared in different current modes. The highest efficiency control strategy is calculated in the conditions of without magnetic saturation, iron-loss, mechanical loss and treating inductance as a constant. At the same time, the maximum ratio of the electromagnetic power to current control is realized. Finally, this algorithm was validated in the simulation and experiment.
Control System of Switched Reluctance Linear Motor Drive Based on TMS320F2812 DSP
Authors: Wang T. , Huo Y. , Zhang X. , Wang Q.
Published: September 2013

The paper presents the drive system of the developed Switched Reluctance linear motor in hardware and in software. The structure and photograph of the three-phase 6/4 structure Switched Reluctance linear motor are given. The main circuit topology of power converter is also given. The designed software for TMS320F2812 DSP is described, includes main program, functional subroutine module and interrupt service subroutine module. The Switched Reluctance linear motor drive prototype was tested experimentally. The velocity curves and the phase current waveforms are given.
Simultaneous Control of Traction and Levitation of Linear Induction Motor Driven by Additional Frequency Component Synchronous with Motor Speed
Authors: Kotani Yasuhiro , Morizane Toshimitsu , Tsujikawa Kosuke , Kimura Noriyuki , Omori Hideki
Published: September 2013

It has been proposed that the traction and levitation of the carrier in the maglev system are controlled by the thrust and attractive force generated in Linear Induction Motor (LIM). In this system, the thrust and attractive force of LIM are controlled simultaneously and independently by the two different frequency components. In this paper, it is proposed to use the frequency component synchronous with the motor speed as one of the frequency components. It makes the design of the controller easier. The controller is designed using the measured parameters of LIM. It is verified that both the traction and levitation control are achieved by the simulation results.
Anticipation in Robot Navigation and Mining for Intresting Patterns
Authors: Gorbenko Anna , Popov Vladimir
Published: September 2013

We consider robot self-awareness from the point of view of temporal relation based data mining. We consider the problem of mining for intresting patterns. In particular, we study the longest common subsequence over the set problem.
The Research of Warehouse Automation System Based on ZigBee & RFID
Authors: Song Bo , Wang Wei Yang , Sun Zhen
Published: September 2013

This document explains the redesigned Warehouse Automation System based on ZigBee & RFID according to the research of present situation of warehouse workflow and management system. Based on the new design, we have succeeded to locate and manage the goods area using the ZigBee, propose a solution that using forklift as a carrier to realize "Offline Goods-Placement Management", so as to improve the accuracy and flexibility of goods management. This study resolves the following research problems: (1) Redesign the overall system workflow. (2) Describe the automation system functions and advantage. This Warehouse Automation System can effectively make up for many shortcomings of the previous warehouse management system and improve the efficiency of warehouse management.
A New Artificial Immune Network Model for Mobile Robot Path Planning
Authors: Yuan Ming Xin , Zhang Pan Pan , Li Han Yang , Cheng Shuai , Shen Yi
Published: September 2013

To solve the mobile robot path planning in uncertain environments, a new path planning algorithm is presented on the basis of the biological immune network. The environment surrounding the robot is taken as the antigen, and the behavior strategy of robot is taken as the antibody. The selection model of antibody concentration is defined based on the Jernes idiotypic immune network hypothesis, and the mobile robot path planning is realized through the selection of the antibody concentration. The simulation of path planning for mobile robot in multi-obstacle environments shows that the robot can find a safe path in complicated environments, which verifies the better adaptivity of proposed planning model. The simulation in dynamic environments shows that the robot can safely avoid all dynamic obstacles, which verifies the better flexility of new algorithm.
Bionic Locomotion Control on Three-Section Leg of Quadruped Robot
Authors: Li Jun , Zhang Xiao Yu , Liu An , Zhang Xue Feng
Published: September 2013

In quadruped robot, there is the strong correlation of kinematic parameters for the joints of two-section leg, and it is difficult to realize the decoupling of rhythm and pattern over rough terrains. In this paper, we investigated the physiological feature, locomotion characteristics and main function of shoulder blade of quadrupeds, and based on the results, we proposed a stratified control system on the three-section leg to realize better adaptation of a robot to terrains. Through the active control of shoulder blade (frequency and amplitude) and the coupled passive control of upper arm and forearm, a leg may adjust to the terrains of different elevations without changing the movement state of shoulder blade and body speed. In addition, the foot trajectory was planned and a rough terrain was created for testing the athletic ability of a three-section leg, and the validity of the proposed control system is confirmed through simulation.
A Precise Positioning System Based on DGPS and GIS for Automatic Driving Vehicle
Authors: Zhang Jian Guo , Li Hong Jian , Liu Bin
Published: September 2013

A precise positioning technology was introduced in this paper and A precise positioning system has been built. The DGPS technology was introduced to acquire accurate data of the roads and traffic facilities in the system and a data-base has been built. The data-base was applied to GIS platform and a centimeter-level accurate road model was established. In addition, DGPS technology was adopted to achieve centimeter-level position. The position data coupling with accurate road model and the locating point would be indicated instantaneously. The distance between the locating point and the road boundaries, traffic signs lines, traffic lights, etc. could be indicated in the map and also the speed, acceleration, etc. of the locating point. This study provided positioning and navigation technology for the automatic driving technology of the intelligent vehicle.
Design and Realization of Intelligent Energy-Saving Circuit
Authors: Li Li Fen
Published: September 2013

An intelligent energy-saving system is designed in order to save energy for the lighting system for classroom, which is composed of single chip, artificial wireless control module, pyroelectric infrared detection module and sunlight intensity detection module. The system can run in two ways of manual control and automatic control. In the case of automatic control, when the light intensity is less than the preset value and there are some people in the classroom, the lamp will light-on automatically. The lamp will remain lighting-on in a period of time after the leaving of people, and the delay time can be set according to the actual situation.
N-C Machining Technology Development Present Situation and the Trend
Authors: Yang Hong Cai , Wu Ming Qing
Published: September 2013

the development of numerical control technology changes with each new day, the article expounds the nc machine tools with complex shape parts of high precision requirements for rapid development, widely used in conventional parts processing, complex shape parts processing. Nc machine tools with the aid of microelectronics and computer technology rapid progress, is toward high precision, multi-function, high speed, high efficiency, composite processing functions, such as intelligent direction, our country numerical control system in the technology has already become more and more mature, in the major key technologies, has reached the foreign advanced level.
Dynamic Modeling and Tracking Control Simulation for Large Electro-Hydraulic Servo System
Authors: Li Feng , Wang Kai , Ma Cheng Li , Yu Jie
Published: September 2013

The co-simulation method of one large electro-hydraulic servo system based on software interface is proposed in this paper. The rigid-flexible-coupling dynamic model of the electro-hydraulic servo mechanism was built through data exchange of SolidWorks, ANSYS and ADAMS, the hydraulic system model and control system framework was built by EASY5 environment, the controller was built by Simulink. The integration of simulation models for the large electro-hydraulic servo system was realized by software interfaces. In view of the poor operation conditions, the high requirement of control precision and real-time characteristics, adaptive fuzzy sliding mode control strategy was applied to position tracking control of the servo system. Simulation results verified the effectiveness of this method.
Design of Helicopter Manipulating Control System Based on LabVIEW
Authors: Wu Zhi Gang , Peng Xian Min , Zhang Gui Chuan , Xu Bin , Liu Qing Lin
Published: September 2013

For the demand of helicopter test, a helicopter manipulating control system was designed and implemented. This paper describes the structure and principle of hardware, the underlying and PC control program, and establishes the mathematical model between control angles and displacement of actuators. According to the practical application, the system meets the requirement of helicopter test very well.
A Robust Control Approach to Network Control Systems with Short Time Delays
Authors: Dong Zi Jian , Ma Yong Guang , Peng Wei
Published: September 2013

Network control system (NCS) is developed from the cross-integration of network technology and control technology, which is with advantages of sharing resources, low price, light weight, easy installation and maintenance, low energy consumption and so on. A robust control approach is proposed in this paper to solve the stabilization problem for networked control systems (NCS) with short time-varying delays. By considering state feedback controllers, the closed-loop NCS is described as a discrete-time linear uncertain system model. Then, the asymptotic stability condition for the obtained closed-loop NCS is derived, which establishes the quantitative relation between the stability of the closed-loop NCS and two delay parameters, namely, the allowable delay upper bound (ADB) and the allowable delay variation range (ADVR). Furthermore, design procedures for the stabilizing controllers are also presented. An illustrative example is finally given to demonstrate the effectiveness of the proposed method.
Model Reference Adaptive Control of HMB Based on PSO-LS-SVM Inverse
Authors: Liu Xian Xing , Chen Jie , Du Yi , Shi Kai
Published: September 2013

To realize the hybrid magnetic bearing (HMB) nonlinear decoupling control with high precision, a strategy of model reference adaptive control (MRAC) based on the least square support vector machine (LS-SVM) inverse is proposed. After analyzing the reversibility of HMB, the LS-SVM regression theory is used to identify the inverse model, the parameters of LS-SVM are optimized by Particle Swarm Optimization (PSO) algorithm. Then the nonlinear system is transformed into a pseudo-linear system by connecting the optimized the inverse model and the original unit. MRAC is designed to realize the compound linear control for HMB. Simulation results confirm that the identified inverse model has high precision and the compound control strategy has good performance.
Design of Dual-Rotor Radial Flux Permanent-Magnet Generator for Wind Power Applications
Authors: Xu Pei Feng , Liu Xian Xing , Shi Kai , Du Yi
Published: September 2013

Wind energy is being widely developed to replace the fossil energy and protect the environment against pollution. This paper proposes a novel dual-rotor radial flux permanent-magnet (DRRFPM) wind turbine with the toroidally-wound windings which can apparently improve the utilization coefficient of wind energy. Two concentric surface-mounted PM rotors are located inside and outside of a cup stator with back-to-back windings, respectively. The configuration, features, and design principle of the proposed machine are introduced. The magnetic circuit approach is used to analyze the machine with a simplified motor topology. To verify the accuracy of the present model, two-dimensional finite element method (FEM) is conducted for the modeled machine to validate the characteristics and performances of the proposed DRRFPM wind turbine.
The Control of the Braking Stability of Active Rear Wheel Steering Vehicle Based on LQR
Authors: Liu Qi Jia , Chen Si Zhong
Published: September 2013

The aim of this article is to improve the brake stability of active rear wheel steering vehicle.
The optimal theory of linear quadratic regulator is used to construct a controller, and the aim of the controller is to maintain the side slip angle is zero, and the control parameter is set according to the change of velocity when braking. An antilock brake model based on the door limit of wheel slip rate is constructed. The analysis is carried on a front wheel steering vehicle, which has two kinds of unti-lock mode. Meanwhile, an active rear wheel steering vehicle with two kinds of unti-lock mode is performed, also. All tests are performed on the bisectional road. The results of analysis show that the active rear wheel steering vehicle using the anti-lock mode of four wheels independent control can give the shortest braking distance, the smaller side slip angle and the smaller deviation from the lane. So it can give more contribution to the braking safety.
Design and Research on Online Sampling Device of New Cigarette Making Machine
Authors: Ying Wei , Yi Guang Bin , Zhou Yi
Published: September 2013

The paper introduces the structure and design principles of online sampling device of a new high-speed cigarette machine. The device is an important part of C2 cigarette online sampling and measurement system, it gets samples from the high-speed cigarette maker machine's conveiying line and send samples to C2 measuring instrument for testing, and it achieved the goal of automatic on-line monitoring of cigarette physical parameters. The device has compact structure and expediently installation, which makes it not only replace manual sampling of high-speed cigarette making machine, but also detect and display various physical parameters of cigarette in real time.
Research and Design of the CAN/LIN Gateway Circuit in Vehicle
Authors: Huang Peng
Published: September 2013

In this paper, a CAN/LIN gateway hardware design is completed. In the hardware framework of the CAN/LIN gateway, Philipss LPC2119 independent CAN and LIN transceiver based on ARM7-TDMI is used for making a CAN control circuit board. In the meantime, an automobile light network control diagram is given, ATMEL 89C52 series MCU is used for automobile light control network nodes, and also the circuit for automobile light control network nodes is made successfully.