bluuebunny/crossref_metadata_2025 huggingface dataset:
Internet of Things and its Application in Intelligent Logistics
Authors: Yu Xin , Bai Yu
Published: December 2012

Internet of Things technology has played a significant role in promoting the development of various industries. intelligent logistics is one of the representative application. Firstly, this paper introduces the principle of Internet of Things, the hardware and software systems. secondly, paper analyzes the Internet of Things technology applications in intelligent logistics and also points out the its problems. Internet of Things promising applications is finally summarized.
Study on Condensation of the Moisture in Current Transformers with Current Flow Considering Sharp Temperature Decrease
Authors: Yan Zhen Hua , Ren Xiang , Ren Hang , Ding Wei Dong
Published: December 2012

On-site experience suggests the possibility of condensation of the moisture in Current transformers (CTs) with initial moisture content lower than the Chinese National Standard. In order to verify such possibility, the relationship between moisture content and ambient temperature in a typical 110 kV CT is studied. The positive correlation of ambient temperature and moisture content without current flow is clarified, and the relationship of moisture content and current RMS value is studied. Increase in current results in increase of moisture content, and the longer the duration of operation, the larger the moisture content. The possibility of frost condensation of the moisture with sharp ambient temperature decrease has been confirmed with initial moisture content lower than the Chinese National Standard.
The Internet of Things' Monitoring and Dispatching System for Port Based on SOCKET Communication
Authors: Liu Duan Feng
Published: December 2012

This article proposes the internet of things monitoring and dispatching system for port based on SOCKET communication, which is through the analysis for port’s current situation, system components, operation process and communication protocol, etc. The system can fulfill real-time positioning monitoring and dispatching for port’s mobile terminals, and also fulfill real-time monitoring and management for the whole port. Eventually it can improve the total competitiveness of port by improving production efficiency of port, securing operation safety and decreasing production cost.
Development Trends and Present Situation about the Error Detection of Plane Thread of Three-Jaw Chuck
Authors: Ma Rui , Sun Chang Jing
Published: December 2012

Analyzed the main factors affecting machining precision of three jaw self-centring chuck with plane thread. Reviewed the states of detection about the error of three-jaw chuck with plane thread. For the shortcomings of the detection in accuracy and efficiency, proposed development trends of using coordinate measuring machine, based on the secondary development of the software to adapt to the fast and batch detection about the error of different specifications of chucks with plane thread, which has a guiding significance to enhance the error detection level of the plane thread and to ensure its precision.
Study on Calibration Technology for Helium Mass-Spectrometer Leak Detector
Authors: Zhao Lan , Feng Yan , Chen Yong Jun , Zhang Di Xin , Sun Wen Jun , Zhang Rui Fang
Published: December 2012

To calibrate the helium mass-spectrometer leak detector in-site in the whole range, a series of leaks with helium-permeable membranes of different leakage rates were connected to a helium mass-spectrometer leak detector separately, then a set of readings of standard leaks were gained, and the relation curves were fitted mathematically between the standard leakage rates and leakage readings so as to give a fitting formula between the whole-range readings and leakage rates. As a result, the simplicity and efficiency method make it suitable for calibrations of helium mass-spectrometer leak detector.
Remote Diagnostic System Based on Video Monitoring of Network Engraving Machining Processing Status
Authors: Ma Bao Ji , Song Ya Wei
Published: December 2012

A new diagnostic strategy that based on remote video monitoring by image processing is proposed, through the deployment of video capture device in the processing site, it can obtain the image information of CNC machining tools processing status, achieve real-time monitoring and fault diagnosis of CNC machining tools. Take the network engraving machine as the cut-in point, this paper introduces the general structure, system functions and principle of the remote monitoring and diagnostic system. This system can not only achieve self-test of the network engraving machine fault diagnosis, alarm and shutdown feature, reducing the sudden failure rate and improve equipment utilization, but also monitor a number of distribution engraving machine processing status through remote video monitoring, and ultimately realize the function of unattended processing site, remote centralized supervision.
Design and Experimental Research on Double-Pitch Time-Sharing Meshing Silent Chain
Authors: Ding Song , Liu Xiao Lun , Zhang Ying Bo , Lu Ji Guang , Liu Jia Jun , Zhu Guo Yu
Published: December 2012

In order to apply silent chain on conveyor, double-pitch time-sharing meshing silent chain is proposed, and by comparing with traditional silent chain with same pitch, the self-weight 20%~30% of this chain is reduced. According to meshing theory, parameters are designed for double-pitch time-sharing meshing silent chain to make each tooth profile of chain plate involving in meshing and time-sharing load bearing and to change the meshing state of traditional silent chain in the meshing process. Noise comparison test is conducted to verify its excellent performance, when rotate speed is 350r/min, the noise of double-pitch time-sharing mesh silent chain is 4.6dB lower than traditional double-pitch roller chain. Meanwhile, 250h abrasion test is conducted, the abrasion elongation of chain is 0.23% after test, which is significantly lower than traditional double-pitch roller transport chain. The rationality of new chain design is proved by test result, which provides theoretical basis for applying silent chain on conveyor.
Analysis of Spectral Resolution of a Portable Cross Czerny-Turner Spectrometer
Authors: Zhang Guo Dong , Lin Hui
Published: December 2012

The cross-type Czerny-Turner optical structure has been widely used in the portable fiber spectrometers.We investigated the relationship between the spectral resolution and the spatial parameters of the cross Czerny-Turner optical structure. The incident angle of the collimating mirror and that of the imaging mirror are the most important factors which affect the spectral resolution. The distances between optical elements have a little influence on the spectral resolution, which can be mostly compensated by adjusting the position of the CCD sensor. A experimental setup was built and the experimental results show good agreement with the simulation.
Drift Error Analysis of Atomic Spin Gyroscope
Authors: Wan Shuang Ai , Fang Jian Cheng , Chen Yao
Published: December 2012

With the rapid development of quantum manipulation technique, atomic spin gyroscope has been demonstrated in recent years. Understanding the sources and the influence of error on the performance of atomic spin gyroscope is important during the design of such devices. The basic principle of atomic spin gyroscope was reviewed and the analysis of error sources presented began with the coupled Bloch equations describing the dynamics of atomic spin gyroscope including magnetic field, light shift and pump-probe non-orthogonality. It was shown analytically that the first order effects of the transverse magnetic fields and imperfections can be eliminated by turning the longitudinal magnetic field on the magnetic field compensation point. The effects of longitudinal magnetic field and light shift imperfections with other terms zeroed contributed only to scale factor of the atomic spin gyroscope. Furthermore, the effects magneto-optical crystal and magnetic shielding due to temperature drift were described and according approaches to suppress these errors were also proposed.
Algorithm Based on Lagrange Interpolation and ZoomFFT for the Power System Interharmonics Detection
Authors: Pang Ting Ting , Liu Gen Wang , Zhu Zhao Xuan , Zhao Xiang
Published: December 2012

Interharmonic adjoining harmonic or fundamental wave can cause voltage flicker directly. It is of great significance to accurately detect the interharmonic composition for improving the quality of power. According to the frequency and broadband characteristics of real power grid signal, an improved interharmonic detection algorithm based on Lagrange interpolation and ZoomFFT is proposed. The amount of data with ZoomFFT method is less than with FFT operation directly, so the time for detecting interharmonic can be reduced. According to estimated frequency with Lagrange interpolation, the ZoomFFT method calculates its amplitude and initial angle related to every son signal. Matlab simulation results show that the solutions are more accurate with reasonable computational time.
The Development of Remote Monitoring and Analysis Platform based on Embedded Systems
Authors: Hao Wei , Duan Yong Hao , Li Lin , Wang Xiao Yi
Published: December 2012

A remote monitoring and analysis platform based on embedded systems is developed, which adopts ARM-based controller and WinCE operating system, combines with serial communication technology, GPS geo-targeting technology and GPRS remote data communication technology. The data are stored in the database. The platform achieves real-time monitoring and historical inquiry of water quality information, and attains the assessment of water eutrophication.
Design of Intelligent Valve Positioner
Authors: Gu Li Hua , Ge Xiao Yu , Yao Xu Dong , Jiang Bo
Published: December 2012

In many applications, the positioner is one of the most important accessories of the control valve. This paper puts forward a method of intelligent valve positioner based on C8051F005, and introduces the hardware circuit and the design method of software. Practical results indicate that this design has better performance.
Design and Implementation of Cholecystolithiasis Automatically Perfusion-Dissolved Instrument
Authors: Zhou Tian Shui , Ling Zhen Bao , Wang Jun
Published: December 2012

In view of the difficulty to operate, low efficiency, and easy to leak of the manual perfusion method for dissolving cholecystolithiasis, an automatically perfusion-dissolved instrument is designed. By means of collecting and analysing the pressure data being outputted from pressure sensor in real time, and adjusting speed and direction of peristaltic pumps automatically to control quantity of dissolvent, so as to achieve the goal of litholysis under constant pressure in the gallbladder. The instrument has function of automatic heating and controlling temperature. Double controllers are used in the design, slave computer controls the running of each module of the instrument, and master computer is used to real-time display operation state and set parameters. Experimental results indicate that the system is stable and reliable, and with high efficiency for dissolving cholecystolithiasis, which provides a new and effective method for cholelithiasis medical treatment.
Analysis on the Anti-Interference Performance of UWB Receivers
Authors: Liu Miao , Liu Miao , Wang Yong
Published: December 2012

UWB technique is widely used in radar detection system benefiting from the large bandwidth and short duration of UWB pulses. In traditional detection system, correlation receivers are usually adopted since lower SNRs are tolerated. This paper analyses the performance of anti-interference with 30dB additive noise for reference signal and 20dB additive noise for received signal as well as the pulse position shift of 100ps in UWB correlation receivers.
A New Method to Reduce the Size of Lut in Digital Frequency Synthesizer
Authors: Cao Yin Ping , Dou Yi Hua
Published: December 2012

In this paper, the principal and application of digital frequency synthesizer are analyzed firstly. Then, the phase truncation error of phase accumulator is discussed theoretically and is eliminated by the real-time scrambling code from Linear Feedback Shift Registers (LFSR) for the purpose of engineering. At last, a new method combined difference method with coarse and fine lookup table (LUT) is proposed to reduce the length and amplitude of LUT. From the simulation of the new method, it is found that the LUT is reduced from 2^14*16 bit to2^10*14 bit and 2^14*7 bit. Also, the spurious free dynamic range of the power of output signal is more than 100dBc.The method can meet the request of project efficiently and save a lot of cost.
Research and Design of Networked Virtual Instrument Electronic Test System
Authors: Zhou Yang , Li Ye , Li Wei Bo
Published: December 2012

A novel virtual instrument operated on different computers, peripherals, measured node and databases connecting to the network based on network and database technology is proposed to achieve resource sharing by using of the virtual instrument electronic test system (VIETS) developed by Jilin University. Users can not only remotely control the instrument measurement, collection, analysis and processing data, but also conveniently monitor the test site, which benefit to the foundation for setting up networked virtual electronic measurement laboratory. A mixed-mode of C/S (client/server) and B/S (browser/server) and a system structure include user client, internet, server, client device and measurement and control equipment was presented. Network function was also achieved by using of LabVIEW, MyEclipse, MySQL and other technologies to accomplish the database design, server management website design and the communication. Thus users can remotely both monitor and control the test instruments through the network function of VIETS.
Design of High Current Two-Way DC/DC Converter in Lithium-Ion Battery Formation Equipment
Authors: He Dong , Liu Gen Wang , Song Ke , Wu Dan
Published: December 2012

As the critical process in battery production, formation is related to the quality of battery and directly affects production cost. A low voltage, high current DC/DC converter is designed for large capacity lithium battery formation equipment. Design of basic topological structure, feedback module and peripheral steering circuit are introduced. Besides, design of PWM driving circuit and parameters of high- frequency transformer are presented in detail. This two-way DC/DC converter has features of high stability, high reliability, small size, light weight and its efficiency of buck-boost can be up to 84% and 83% respectively.
Theoretical Line Loss Calculation in 10kV Power Distribution Network Based on an Improved Alternative Method
Authors: Chen Bing Xia , Tan Jian Cheng
Published: December 2012

Theoretical line loss calculation is the basis of making line loss analysis and loss-reduction decision. Due to technical constraints in the past, traditional algorithms on theoretical line loss calculation used a large number of simplified calculations. This paper proposes a new online method of line loss calculation in distribution networks which is based on PQU (active power, reactive power and voltage) load curves. Based on a new kind of metrical equipment and the proposed method, the power loss calculation system has been developed and has been tested on several rural power networks. The results prove that the method improves the assumptions of traditional algorithms and calculation precision.
Design of a Sawtooth Generator Applied for Class-D Audio Power Amplifier
Authors: Liu Zi Yi , Jing Xing Xing , Xi Wen
Published: December 2012

A systematic introduction to principles and advantages of the class-D audio amplifier based on pulse width modulation (PWM) are presented in this paper. The traditional sawtooth generator needs voltage-regulator tube to server as a core component. Against to such a disadvantage a simple way based on the charging and discharging capacitance is proposed to achieve sawtooth generator. The circuit design is based on SIMC 0.18um process. Spectre simulation results show that the sawtooth generator's performance is good. And it suits for the design of class-D audio power amplifier chip.
Design of the Heat Dissipation for 4W High Power LED Lamp
Authors: Gao Chang Yin , Li Wan Quan
Published: December 2012

At present, about 80 ~ 90% of high-power LED input power is converted into heat, so heat dissipation is a key factor affecting the use of LED. By the theory of thermal resistance, the heat conduction mode of the 4W high power LED light is obtained, and the effective cooling area of the LED radiator is computed. According to the EFD method the natural convection thermal analysis is conducted. Finally the heat experiment is conducted to verify the simulation results. The results show that the LED radiator meet the application requirement, namely the maximum temperature is less than 65°C. Undoubtedly the research will provide design guidance on the heat dissipation of LED lighting
Application of Common Information Model in Analyzing the Area of Vulnerability to Voltage Sags
Authors: Li Ding , Zhou Shuang Ya , Tao Shun , Xue Jia Jia , Xiao Xiang Ning
Published: December 2012

The common information model CIM in IEC61970 standard is an abstract description of existing physical objects and their relationship in power system, which has been widely used in the construction of computer application systems of power system. In order to track the real-time operation state of power system when analyzing the area of vulnerability (AOV) to voltage sags, this paper proposes a novel method to obtain the data required by AOV analysis through parsing source data defined with CIM, and source data are from the SCADA system, equipment management system and management information system of safe production. The design scheme of AOV analysis using CIM is introduced, and method of parsing CIM is also provided. Finally, the method is applied to a regional power system of China, and graphic results of AOV are shown under balanced and unbalanced faults.
A Low-Cost Hybrid Active Power Filter for High Voltage System
Authors: Li Yan , Li Gang
Published: December 2012

A novel low-cost shunt hybrid active power filter for power quality in high voltage system is proposed in the paper. The active power filter is based on three-phase four-switch structure. An inductor is parallel in the second-side of the transform, instead of connected in the first-side of transform. An improved SVPWM is proposed according to the APF structure. A novel coordinate matrix is proposed to transform three-phase circumrotating coordinate into two-phase static coordinate. The zero vector is composed of two space voltage vectors with same breadth and contrary direction at same working time in a switch period. Simulation results confirm the validity of the proposed structure and the improved SVPWM.
A Novel Framework of the Life Cycle Asset Management for Transmission and Transformation Equipment of Power System
Authors: Wu Yue , Wan Jun Biao , Wang Ke Yi , Ma Rui
Published: December 2012

Nowadays, State Grid Corporation is promoting the construction of the “Large Five” system and new requirements for the management of are put forward. A brief analysis of the current power transmission and transformation equipment management and their existing problems is given in this paper. Based on the analysis, the Power transmission and transformation equipment life cycle management framework is proposed. The framework is composed of management support systems, including asset management standard system, key index evaluation system, assets benefit evaluation decision mechanism when put into operation, the life cycle assets management information system, and decision-making method with the cost benefit mechanism and key index evaluation mechanism. At the same time, with the use of risk assessment, assets life-cycle cost management, state evaluation, reliability evaluation, life evaluation, the transmission and transformation equipment assets management level is optimized.
Wavefront Aberration Correction with Conjugated Combination Models of Zernike Modes
Authors: Niu Sai Sai , Shen Jian Xin , Liang Chun , Zhang Yun Hai
Published: December 2012

In view of the coupling relationship between the Zernike modes over the concentric circle domain within the unit circle and the wavefront counteraction of those coupling modes within the reconstruction pupil region, the linear combination models of Zernike modes are presented. The modes in each model share with negative correlation, same coefficient sign and prescribed amount. Finally, the experiments are implemented on AO system, the results show that it’s feasible and advantageous to use the combination models in the process of aberration correction.
Energy-Saving Technologies of WSN in Water Quality Monitoring
Authors: Zheng Rong Mao
Published: December 2012

The quality of overall national surface water has been slightly polluted, large number of cheap and convenient wireless sensor were used by environmental protection departments to 24 hours water quality monitor, in order to layout convenient the wireless sensor node generally used battery for power supply, the node require working up to several months or even years but battery replacement was difficult or impossible. In this paper, research does not affect the function of WSN how to save the node energy consumption, which can work more time in large-scale collection, processing and communication of complex environmental data. Results show that the node energy-saving technologies and network integrated energy-saving technologies can be to reduce the energy consumption of nodes 31.8% and 55.6%, which can greatly extend the working life of the wireless sensor node battery.
Wireless Sensor Network Indoor Environment Monitoring System Based on LabVIEW
Authors: Wang Xi , Lu Xiao , Wang Hai Xia
Published: December 2012

According to the temperature, humidity, air quality and other environmental factors, the indoor environment monitoring system is designed, which collects the signals of a sensor using the NI company’s WSN module, uploads to the computer, and uses graphical programming software-LabVIEW, for PC software design. The function of real-time display and alarm of data, the alarm history records, and data storage in the different positions in the room environment are realized, and then the indoor environment monitoring system is built quickly.
Research on Wireless Sensor Monitoring Networking Technology for Coal Mine Safety
Authors: Liu Zhen Xiang , Shi Yong Heng , Wang Xin , Feng Ming Xing
Published: December 2012

According to the demand of coal mine safety monitoring, this paper proposes an improved clustered wireless sensor networking scheme. It analyzes the node sleep and wake-up mechanism, topology control, routing protocol, and designs the corresponding routing protocol LEACH-i. Finally, it carries out the system simulation.
Ground Surface Deformation Sensor Based on Cable Impedance
Authors: Tong Ren Yuan , Li Qing , Li Ming , Li Xiong
Published: December 2012

In order to measure ground surface deformation, a sensor based on cable impedance change is studied in this paper. This sensing cable has elastic double helical structure with much larger measurement range than optical fiber distributed deformation technology. Using the precision impedance analyzer, we obtain the relationship between elongation and impedance of the sensing cable and choose one of the frequent as the measurement frequency. A ground surface deformation measuring circuit is designed for the sensing cable. Deformation experiment shows that the relationship between sensing cable impedance and stretching deformation is approximately linearity, when the deformation is small.
How to Enhance Efficiency and Accuracy of the Over-Deterministic Method Used for Determination of the Coefficients of the Higher-Order Terms in Williams Expansion
Authors: Šestáková Lucie
Published: December 2012

Using higher-order terms of the Williams expansion is necessary for assessment of fracture behavior of quasi-brittle materials. Multi-parameter fracture mechanics enables more accurate determination of the stress/displacement field even in a larger distance from the crack tip, thus the extended zone with non-elastic behavior typical for this kind of material can be well described. The so-called over-deterministic method (ODM) seems to be a suitable tool for the higher-order terms coefficients calculation, but its utilization exhibits some limitations. Therefore, extensive analyses have been performed in order to summarize recommendations regarding the mesh sensitivity, boundary conditions influence, etc. List of pieces of advice and author’s experiences presented in the end of this work should contribute to more accurate and effective utilization of the ODM.
Micro-Crack Propagation in Particulate Composite with Different Types of Matrix
Authors: Majer Zdeněk , Náhlík Luboš
Published: December 2012

Particulate composites with polymer matrix and solid fillers are one of important types of materials. Generally, these materials are usually used as construction materials, high-performance engineering materials or protective organic coatings. The main aim of a present paper is an estimation of the micro-crack behavior in the particulate composite with non-linear polymer matrix. The polymer matrix filled by magnesia-based mineral filler is investigated by means of the finite element method. A non-linear material behavior of the matrix was obtained from experiment as well as properties of mineral filler. Numerical model on the base of representative plane element (RPE) was developed. The results show that the presence of interphase between particle and matrix can improve fracture toughness of polymer particle composite through debonding process. The conclusions of this paper can contribute to a better understanding of the behavior of micro-crack in particulate composites with respect to interphase.
Large Amplitude Vibration Analysis of Composite Beams under Thermal Stresses: Closed-Form Solutions
Authors: Daneshmehr Ali Reza , Mohammad Abadi Mostafa , Soleimani Meisam
Published: December 2012

In This study , the large amplitude vibration analysis of laminated composite beam under thermal stress with axially fixed ends is investigated with symmetric and asymmetric layup orientations by using the Rayleigh–Ritz (R–R) method. An exhaustive set of beam boundary condition are studied, namely, hinged-hinged, clamped-clamped, hinged- clamped, hinged-guided and clamped-guided beam in order to prove the efficacy of the present formulation. The composite beam is studied in this paper based on Euler-Bernoulli assumption together with von-Karman’s strain-displacement relation. The simple and efficient closed-form solutions are obtained for the nonlinear harmonic radian frequency as function of central amplitude of the beam using the R–R method. Comparison between results of the present study and those available in literature shows the accuracy of presented closed-form solutions.
Hybrid Force-Position Dynamic Control of the Robots Using Fuzzy Applications
Authors: Vladareanu Luige , Vladareanu Victor , Schiopu Paul
Published: December 2012

The paper presents methods of improving the hybrid force-position dynamic robot control using fuzzy logic for the error control. The implementation of the open architecture control system for robots using fuzzy application allows for the control of the hybrid position and force in Cartesian coordinates through real time processing of the Jacobean matrix obtained out of forward kinematics using the Denevit-Hartenberg method and calculating the Jacobean inverted matrix for control in closed loop. The effectiveness of various fuzzy control structures in controlling the force-position of the robot or mechatronics actuators is presented.
Material Handling Mechanisms Used in Flexible Manufacturing Systems
Authors: Mihaila Lucian Adrian
Published: December 2012

In small and medium batch series manufacturing the small tool and workpiece changing time is one of the main objectives to follow in obtaining high productivity. These auxiliary times are defined as the times consumed with preparing and changing the next tool or workpiece to follow the machining process, times that usually overlap the machining process. For this purpose machining centres are equipped with an automatic tool changer system and an automatic pallet changer system. The palletizing systems imply eliminating the times consumed with the alignment, fixing and clamping of the workpieces, these systems consisting of several mechanisms: the pallet, the automatic pallet changing mechanism, the positioning mechanism and the pallet clamp/unclamp mechanism. In this paper we present an general overview of the automatic pallet changing mechanisms used both in flexible manufacturing systems and machining centres.
Mechanical Enhancement of Carbon Fiber/Epoxy Composites Based on Carbon Nano Fibers by Using Spraying Methodology
Authors: Sarim Ali , Zhang Bo Ming , Wang Chang Chun
Published: December 2012

Carbon nanofibers have been utilized increasingly for enhancing the mechanical properties of advanced polymer composites, which include high strength, stiffness, toughness, and through-thickness Properties. The incorporation of nano particles with a high aspect ratio and extremely large surface area into polymers improves their mechanical properties significantly. Although a number of efforts have been made to improve various properties by mixing nano particles directly into resin, however, it could lead to high viscosities which create problems during processing. In this particular study, an attempt has been made to enhance mechanical response of nano composites by using, state of the art, a different technique i.e spraying the Carbon Nano Fibers (CNF) on dry perform before infusion. The nano composite samples were prepared using a spraying methodology i.e dispersing the 1.0 weight percent CNF solution on carbon fabric, and evaporating the solvent such that only nano fibers remain on perform, followed by Vacuum assisted resin transfer molding (VARTM). Tensile, compression, flexural and short beam strength tests were performed to evaluate the effectiveness of CNF addition on the mechanical properties of carbon / epoxy composites. Results indicated, CNF addition offered simultaneous increase in all these mechanical properties in different percentages i.e 22–28 percent improvement in tensile strength, 7-11 percent in compressive strength, 14–19 percent in Flexural strength and 45-55 percent short beam strength with respect to the neat composite. The rise in their modulus has also been discussed in detail and part of this study. For in-depth analysis, Microscopic approaches were also carried out to investigate the fracture behavior and mechanism of material. Scanning electron microscopy of fractured surfaces revealed improved primary fiber–matrix adhesion and indications of CNF-induced matrix toughening.
Optimization of the Robots Fourier Spectrum by Using the Assisted Research, Neural Network, Smart Damper and LabVIEW Instrumentation
Authors: Olaru Adrian , Olaru Serban , Oprean Aurel
Published: December 2012

The most important things in the dynamic research of industrial robots are the vibration behavior, the transfer function and the vibration power spectral density between some of the robot joints and components. In the world this research is made without the assisted research. In each of the study cases in this paper was used the proper virtual Fourier analyzer and was presented one new method of the assisted vibration analysis. With this research it is possible the optimal choosing the base modulus type to avoid the frequencies from the robot spectrum. In the manufacturing systems, the most important facts are the vibration behavior of the robot, the compatibility with some other components of the system. All the VI where achieved in the LabVIEW soft 8.2 version, from National Instruments, USA. This method and the created virtual LabVIEW instrumentation are generally and they are possible to apply in many other dynamic behavior research.
Design of Hybrid Mobile Service Robot
Authors: Jánoš Rudolf , Hajduk Mikuláš , Semjon Ján , Šidlovská Ľuboslava
Published: December 2012

Wheels and legs are two widely accepted methodology used to move the moving platform to the ground. Wheels are human inventions, the rolls in a straight country excel in energy efficiency and speed of movement. Hybrid platform for integrating the benefits of legs and wheels with high mobility of both seems to be the "future" of mobile platforms for indoor and outdoor environment. This paper describes the design leg-wheel chassis for service robot.
Warranty Data Evaluation
Authors: Vintr Zdenek , Vintr Michal
Published: December 2012

The article deals with a possible way how to monitor and evaluate warranty date. Tools that allow the current development of warranty costs and related indicators to be monitored and evaluated are outlined in the article. The tools proposed are applicable to the continuous (periodical) evaluation of real development and the detection of possible deviations, which can occur when comparing real and predicted development warranty data.
Airfoils Aerodynamic Performance Analysis in Heavy Rain
Authors: Ismail Muhammad , Cao Yi Hua
Published: December 2012

Heavy rainfall greatly affects the aerodynamic performance of the aircraft. There are many accidents of aircraft caused by aerodynamic efficiency degradation due to heavy rain. In this paper we have studied the heavy rain effects on the aerodynamic efficiency of NACA 64210 and NACA 0012 airfoils with cruise and landing configuration. For our analysis, CFD method and preprocessing grid generator are used as our main analytical tools, and the simulation of rain is accomplished via two phase flow approach named as Discrete Phase Model (DPM). Raindrops are assumed to be non-interacting, non-deforming, non evaporating and non spinning spheres. Both cruise and landing configurations of airfoils exhibited significant reduction in lift and increase in drag for a given lift condition in simulated rain. Our results are in good agreement with the experimental results. It is expected that the quantitative information gained in this paper will be useful to the operational airline industry and greater effort such as small scale and full scale flight tests should put in this direction to further improve aviation safety.
Spartacus IV Auto – Pilot System Presentation Customised for EADFP Platform
Authors: Coşereanu Liviu , Cristian Aura , Codrea Sabin
Published: December 2012

the work paper presents the auto-pilot solution adopted for an unconventional unmanned air vehicle (EADFP) based on a simplified algorithm implemented on a micro controller hardware configuration.
Computational Modeling of Interaction of Dental Implant with Mandible
Authors: Marcián Petr , Borák Libor , Konečný Ondřej , Navrátil Petr , Florian Zdeněk
Published: December 2012

This paper is focused on computational modeling of an interaction of dental implant with mandible bone. It describes creation of computational model including model of geometry, materials, loads and constraints. There is a comparative stress-strain analysis of the levels of cancellous bone model. Computations are performed with the use of finite element method. Results show differences between the model which includes trabecular architecture of cancellous bone tissue and the model with non-trabecular cancellous bone tissue. For better description of the processes in bone tissue and at the interface between bone tissue and implant, it is necessary to create the computational model on the highest possible level, i.e. with the trabecular bone tissue.
A Novel Variable Impedance Compact Compliant Series Elastic Actuator: Analysis of Design, Dynamics, Materials and Manufacturing
Authors: Rahman S.M. Mizanoor
Published: December 2012

This paper presents the analysis of electro-mechanical design, selection of materials and manufacturing techniques for physical construction, dynamics, control etc. of a novel variable impedance compact compliant series elastic actuator (SEA) for human-friendly robotics applications. The electro-mechanical design consists of a servomotor, a ball screw, a torsional spring connecting the servomotor and the ball screw via a pair of spur gear, and a set of translational springs connecting the ball screw nut to the output link. The translational springs have low stiffness and these are used to handle low force operations that reduce non-linear friction, output impedance, impact etc. The torsional spring is in the high speed range, has high effective stiffness and it enhances the system bandwidth for large force operations when the translational springs are fully compressed. Suitable materials and appropriate manufacturing techniques for the construction of the actuator are discussed. Kinematics and working principle of the actuator are analyzed. The actuator model is simulated on the physical implementation for dynamics and control for different conditions. Simulation results prove satisfactory performances of the design. Then, advantages of the design over its existing counterparts are discussed, and its potential applications and future extensions are mentioned.
The Method Research of Auto-Generating Engineering Geology Histogram Based on MapGIS
Authors: Chen Ling Xia , Xu Liang
Published: December 2012

This thesis study on algorithms of auto-generating engineering geology histogram, For example: the hierarchy model of drilling histogram, rendering algorithm of lithologic columnar and the rendering algorithm column separator. MapGIS was secondary exploitation platformand , and Borland C++ Builder 6.0 was programming language. Through called MapGIS’ secondary exploitation components directly and used algorithms mentioned in this paper, engineering geology histograms was auto-generated. Being validated by practical engineering geology data, the software system not only runs steadily and generates plot rapidly, but also the result is exact, generating histograms is slinky and concordant.
Experimental Study on PCB Micro Drilling Force
Authors: Gong Feng , Chen Bai Qiang , Li Ji Bin
Published: December 2012

With the development of high density, multi-functions, miniaturization and multi-layer on printed circuit board (PCB) design, great challenges have been presented to the miniaturization of drilling on PCB. In order to meet the hole precision, quality and improve the performance, efficiency of mechanical drilling, further research should be done on the cutting state. Kistler high-precision micro-force platform was used in this paper to test and analyze the cutting force, investigate the general laws of micro drilling, and optimize the parameters for HANS PCB drilling machine. Thereby, to improve the efficiency and precision of the drilling, range of processing, and increasing market competitiveness.
Thermodynamic Performance of Ammonia Water Power Cycle (AWPC)
Authors: Gong Y.L. , Luo C. , Ma W.B.
Published: December 2012

This paper introduces the ammonia water power cycle and presents the cycle performance criteria such as net power output, net power energy per ton of geothermal water, heat efficiency and heat exchanger area of per net power. The cycle influencing factors such as ammonia concentration, solution circulation ratio and hot water temperature are analyzed. Results show that there is an optimum range of ammonia concentration and solution circulation ratio. The power system exploits a new way for utilizing the mid-low temperature heat resource efficiently.
Discussion on the Combination of the Modern Ceramic Art with Outdoor Environment
Authors: Qi Ou Yang , Tao Ou Yang , Liu Wen Sheng
Published: December 2012

Since the success of drilling wood to make fire was achieved by human for the first time, the history of tens of thousands of years had passed over. In such a long period of time, the ceramic culture was created by Chinese people with their own wisdom and hands. In the modern times, the age of the information economy, which has attained a rapid development, has brought about a new, important, and different beginning to human beings. Along with the arrival of the comprehensive cultural age in which natural science is mutually colliding with humanism science, technology and art, thinking in images, and rational thinking, etc. In the meantime, the pursuit of people in beautiful things is developing, and also their consciousness in aesthetics is continuously improved. Modern ceramic art is a demand of human on civilization, but also one of the most important components of the history of art. Besides, modern ceramic art has been accepted by modern people in a certain space environment with great willingness, and also are more appropriate to the needs of modern people, because it owns many characteristics and advantages. For this reason, the combination of modern ceramic art with outdoor environment has a bright and roomy bright prospect in future de-velopment.
Research on the Distribution of Resin Canals of Cedrus deodara Based on Wood Anatomy
Authors: Xu Bin , Zhu Tao , Peng Zhen Hua
Published: December 2012

Whether the resin canals of Cedrus deodara are caused by injuries is still controversial. In this paper, with the branches and trunks of Cedrus deodara taken as research objects, the resin canals in the phloem and xylem of Cedrus deodara are quantitatively and qualitatively analyzed and researched with the principles of wood science, aiming at exploring whether its distribution provided with regularity. The results showed that several parts showed relative stability, such as the morphological characteristics, anatomical structure, occurrence time, cellular component and quantitative characteristics and so on. In terms of occurrence probability and quantities, the resin canals generally occurred in the compression and lateral zones of branches while few in the opposite zone; the occurrence of the resin canals of trunks had an extremely close tie with the growth and insertion angle/direction of the branches of different areas and directions, etc. Therefore, from the perspective of formation time, Cedrus deodara belongs to the tree species with slowly-formed resin canals.
Fatigue Life Prediction of Vehicle Transmission Shaft Assembly without Intermediate Support
Authors: Huang Kang , Li Jia Wei , Cao Huo , Industries Taier Heavy
Published: December 2012

Vehicle transmission shaft assembly is an important component of automotive transmission, parts of which are facing the problem of prematurely resulting in fatigue failure. This paper responding for needs in this area, puts forward a method to predict fatigue life of vehicle transmission shaft assembly without intermediate support, based on workbench finite element software and fatigue software modules. With this method, we found the fatigue failure parts of the transmission shaft accurately and the specific location of the failure zone on the parts, which provide the technical basis for the further optimization of parts. And then contrast analysis of results with the actual fatigue fracture, it shows that the method is effective.
Feature Analysis of Advanced Radar Emitter Signals Based on Continuous Wavelet Transform
Authors: Zhu Bin , Jin Wei Dong
Published: December 2012

For further study the recognition problem of radar emitter signals (RES), the theory of continuous wavelet transform (CWT) and gray moment are introduced into the feature extraction of RES. A new approach for RES feature extraction was proposed based on CWT and gray moment. By using the time-frequency domain characteristics of wavelet analysis and the moment-based method, the CWT coefficients of RES and the changing rules of RES gray moment were researched. The experiment results shows that the wavelet gray moments of the RES take on a rising trend along with the increase of the order, and the four-order wavelet gray moment vector can express the local information of RES more exactly. This is useful for further research on RES feature extracting.
Design of LED Integrated Package Devices
Authors: Jiang Ying , Xiong Zhi Hua , Xiang Qian
Published: December 2012

To solve the technical problem of LED chips with top and back electrodes can only forms parallel connection; this paper provided integrated packaging structure by using silver reflective layers, aluminium oxide and aluminum plate. LED chips with top and back electrodes, according to a certain permutations and combinations way, were packaged integrally on the independent silver reflective layers. The silver reflective layers were on the aluminum plate with aluminium oxide insulating layer. Studies show that when the LED chips with top and back electrodes packaged on aluminum plate with aluminium oxide insulating layer are easier to achieve parallel and series connection. Moreover, the LED integrated package devices has higher driving voltage and lower driving current than traditional LED integrated package devices with top and back electrodes. In addition, independent silver reflective layers can provide integrated package devices with a better luminous efficiency.
Effect of Aging Treatment on Damping Capacity in Mncunife Alloy
Authors: Fu Xu , Li Ning , Wen Yu Hua , Teng Jing , Zhang Ying
Published: December 2012

M2052 alloys with various aging treatments are obtained in order to investigate the relationship between aging treatment and damping capacity by the torsion pendulum, X-Ray Diffraction (XRD) and Transmission Electron Microscope (TEM) methods. The results show that M2052 can obtain high damping capacity (δ>0.2) when aged at a range from 400°C to 450°C, and the damping capacity after aged at a lower temperature is higher than that aged at a higher temperature for the maximum values. TEM and XRD results show that fcc-fct transformation occurs after aging treatment. The volumes of fct structures are one of reason to affect the damping capacity in M2052 alloy. The better understanding aging treatment could promote the applications of M2052 alloy.
Contact Fatigue Analysis of Mine Helical Cylindrical Gear Based on ANSYS Workbench
Authors: Li Xue Yi , Li Chao Chao , Huang Bin Bing , Li San Shuai
Published: December 2012

A general method for calculating contact fatigue strength of Mine helical cylindrical gear was studied in this paper. Both the Solid model and finite element model were created in ANSYS. Based on the fatigue analysis module of the ANSYS Workbench, The contact fatigue strengths of the helical cylindrical gear pair were calculated, and corresponding contact fatigue lives and safety factors of two gears in any meshing position were obtained and shown in contour map. A simulation calculation for a pair of mine helical cylindrical gears was carried out. Simulation results show that calculation of the contact fatigue strength of helical cylindrical gear by this method is more scientific and reasonable than traditional empirical method.
Design of Synchronous Machine Model Based on PRO/E and Dynamic Simulation
Authors: Zhong You Kun
Published: December 2012

With the increasing of the number of cars, people are also getting higher and higher demands on the performance of the car, and especially pay attention to the improvement and optimization of automobile transmission system. The transmission is a key part of automobile transmission system, and transmission performance and stability depend on the synchronous machine, so in order to make the vehicle transmission system with higher efficiency, it is necessary to study the synchronous machine. On the basis of elaborating synchronous machine working principle, the use of dynamics theory to establish mathematical model of synchronous machine system, and to carry out the simulation of synchronous machine three-dimensional model in PRO/E environment, then the use of virtual prototype technology to optimize the parameters of synchronous machine, thereby improving the performance of synchronous machine.