bluuebunny/crossref_metadata_2025 huggingface dataset:
Time Efficient Testing of Hybrid Electric Vehicles Using Automated Identificated Physical Model Structures
Authors: Albers Albert , Schwarz Alexander , Hettel Rolf , Behrendt Matthias
Published: September 2013

Validation and optimization of technical systems are central activities in the product development process. One part of it is the calibration and validation on a level, which covers the whole vehicle. The aspect, that plays the most important role in both validation and optimization, is the driving condition. Especially in the case of hybrid vehicles, state variables like the state of charge (SOC) have great influence on the operating strategy and therefore on assessment criteria.The article’s objective is to present a procedure, which performs the conditioning and brings the planned maneuver into an order, which reduces the total needed conditioning duration. Thereby a lot of time can be saved, according to the type and amount of the possible maneuver and state values. In addition to optimizing the order of conventional maneuver, the procedure can be used to optimize the list of maneuver in a DOE-Plan. Thereby the maneuver of the individual criteria can be re-sorted as well as the designparametervariation. The IPEK-X-in-the-Loop framework (XiL) is the basis for the approach and will be used as a validation environment in an acoustic roller test bench with vehicle-in-the-loop technology.
Modelling and Simulation of Spherical Inverted Pendulum Based on LQR Control with SimMechanics
Authors: Fajar M. , Douglas S.S. , Gomm J.B.
Published: September 2013

This paper describes how to simulate the spherical inverted pendulum, a dynamics of multibody system, with SimMechanics. The control strategy used is based on the LQR feedback method for the stabilisation of the spherical inverted pendulum system. Simulation study has been done in Simulink environment shows that LQR controller is capable to control multi input and multi output of spherical inverted pendulum system successfully. The result shows that LQR control strategy gives satisfactory response that is presented in time domain with the details analysis. The use of SimMechanics for simulation of spherical inverted pendulum has some advantages i.e. not need to derive equations of motion, available visualisation tools, fast and easy design
Computer Aided Design and Three-Dimensional Modeling of High-Order Deformed Elliptical Gear
Authors: Huang Zhi Dong , Hui An Min , Chen Peng , Wang Yu
Published: September 2013

The characteristics of high-order deformed elliptical gear is analyzed. The parameters of high-order deformed elliptical gear are chosen and calculated. The modeling method of high-order deformed elliptical gear is presented. The shape of pitch curve is determined. The position and orientation of gear teeth are clarified. The three-dimensional solid model of high-order deformed elliptical gear is achieved. The method and the result facilitate finite element analysis and numerical control machining simulation of high-order deformed elliptical gear.
Evaluation of the Effectiveness of Heating Systems Applied in City Buses
Authors: Bajerlein Maciej , Merkisz Jerzy , Daszkiewicz Pawel
Published: September 2013

The paper presents energy saving opportunities in by analyzing two types of auxiliary heating systems. Objects of study were two heaters differing in power requirements and fuel consumption (used for water heating system). The heaters were installed in city buses of the same layout and identical convector heaters fitted for optimum temperature of the vehicle interior and the engine. Through the use of a portable device SEMTECH DS (PEMS) the exhaust emissions of CO, HC, NOx, CO2were measured. The testing of the heaters for emissions and the testing of the temperature distribution inside the vehicle were performed in stationary conditions, determining the impact of the heating on the energy consumption of the heaters and temperature comfort inside the vehicle. The measurements were performed for each vehicle at the same ambient temperature, which was about 10°C [2, 3, 5]. So that the temperature increase inside the vehicle could be compared the tested vehicles were conditioned before the measurement. The obtained temperature distributions were determined along with a relative increase in the temperature in the vehicle interiors heated by the tested objects. The temperature measurement was performed with the use of six thermocouples utilizing a signal converter - IOTECH PERSONAL DAQ 3000.
Controlling CO2 and CH4 Emission in a Degraded Peat Swamp Forest Related to Water Table and Peat Characteristics
Authors: Kalsum Leila , Ngudiantoro null , Faizal M. , Pks A. Halim
Published: September 2013

This study focuses on factors controlling CO2and CH4emission in a peat swamp forest related to water table and peat characteristics such as peat depth, C-organic, pH, ash content and N-total. This study was conducted in the dry season at a Merang peat swamp forest that has degraded due to logging activities, forest fires and canal opening. Emission of CO2and CH4was measured by using a closed chamber made by PVC material (60 cm x 60 cm x 40 cm). This close chamber was completed with a fan inside the chamber to stir the gas, a thermometer inside the chamber to measure the gas temperature and a syringe to sample gas. This study has shown that the highest CO2emission is at an average of 438.93 mg/m2/hr occurring in land cover type (1) ferns and grasses (open burned area) and the lowest is at average of 44.45 mg/m2/hr in thegelamandbelidang-dominated land. The emission of CH4is very low between 0.0018 to 0.0069 mg/m2/hr. the main controlling factor on CO2and CH4emission is concluded to be the water table. The emission of CO2will be greater if water table, pH and C-organic increase.
The Flow and Heat Transfer Characteristic of Curved Channel CPU Water-Cooled Heat Sinks
Authors: Liu Yan Feng , Li Xiang Hong , Li Shi Ping
Published: September 2013

This article conducted numerical simulation and experimental study of curved channel laminar flow and heat transfer characteristics with different Reynolds number and different heat fluxes, it also showed the comparison with straight rectangular channel of a same heat transfer area. The results showed that: cooling effect of curved channel heat sink is better than that of straight rectangular channel heat sink, temperature distribution appears to be more uniform as well; The experimental results showed that the curved channel heat sink can effectively satisfy the needs of the CPU cooling.
Indentation Size Effect (ISE) of Vickers Hardness in Steels: Correlation with H/E
Authors: Budiarsa I. Nyoman
Published: September 2013

The indentation size effect (ISE) in Vickers test using steel as a typical model material group with selected heat treatments (annealed or tempered) has been investigated and analysed. Systematically hardness test were performed within a commonly used micro-load range. The ISE data was analysed by fitting data following the Meyer power law and the proportional specimen resistance (PSR) models and the link between ISE and the hardness-to-modulus ratio (H/E) was discussed. The results show that the ISE data correlated well with the Meyers power law (P= A.dn) and the PSR (P/d=a1+a2d) models. The ISE power law index n exhibited a reasonable agreement with the hardness-elastic modulus ratio (H/E), which potentially could be used the relative contributions of plastic and elastic deformation contact area under indentation load and as a measurable input for inverse material parameter prediction.
Analysis and Design of Series Transformer
Authors: Yu Wei , Li Lin , Zhao Zhi Bin
Published: September 2013

Based on the structure of unified power flow controller (UPFC) device, this paper aims to analysis the operation characteristics of series transformer and develops a design case. Operation characteristics analysis consider several factors including BIL insulation level, resistance to short-circuit, harmonic suppression, winding leakage reactance parameters and winding temperature rise. To take account of the feasibility of applying shell-type transformer, a simple example is developed based upon a set of parameters, with capacity 50MVA and line voltage 220kV.
A New Multifunctional Bioreactor Based on Linear Motor
Authors: Wang Da Shuai , Men Yu Tao , Gao Li Lan , Dong Xin , Lu Jun , Zhang Chun Qiu
Published: September 2013

A bioreactor has provided a new way for the biomedical tissue engineering, and it is a device system that simulates the metabolism and movement of organisms to obtain target product in vitro. By reference and study of the bioreactors, based on the linear motor of high-precision and high-frequency characteristics, we have designed a bioreactor with varieties of biomechanical functions by using CAD design software, that is especially used in the tissue engineering for mechanical stimulation. The bioreactor can not only load on the cultures under rolling, sliding or their combination as well as tension and compression, but also on the cultures under high-frequency and dual-frequency forces. It will provide a more effective research platform for tissue culture and regeneration.
The Study of Energy Storage Technology Application in Wind Power Integration
Authors: Xu Xiao Ning , Zhou Xue Song
Published: September 2013

The classification and application range of energy storage technology are briefly introduced. Challenges for large-scale wind power integration are summarized. With regard to the problems in system stability, low voltage ride-through ability of wind the turbine generator, and power quality, the paper elaborated some solutions based on energy storage technology, and analyzed their advantages and disadvantages. With the character of energy storage technology combined, the paper put forward some advice of energy storage technology applying in wind power integration.
Preliminary Study on the Influence of Wind Power on Low-Frequency Oscillation under Outward Transmitting Thermal Generated Power Bundled with Wind Power Typical Scene
Authors: Li Peng , Wang Ning Bo , Chen De Zhi , Zhu Xiao Rong , Song Yun Ting
Published: September 2013

Increasing penetration level of wind power integration has a significant impact on low-frequency oscillations of power systems. Based on PSD-BPA simulation software, time domain simulation analysis and eigenvalue analysis are employed to investigate its effect on power system low-frequency oscillation characteristic in an outward transmitting thermal generated power bundled with wind power illustrative power system. System damping enhances markedly and the risk of low-frequency oscillation reduce when the generation of wind farm increase. In addition, dynamic reactive power compensations apply to wind farm, and the simulation result indicates that it can improve dynamic stability and enhance the system damping.
The Research of Power System Stability Problems Caused by Integration of Large-Scale Wind Power
Authors: Xu Xiao Ning , Zhou Xue Song
Published: September 2013

In recent years, wind power in China developed rappidly. More and more problems occurred with the integration of large-scale wind power. Arounding the issues of power system stability which are resulted from the integration of wind power and ite relevant technology, this paper mainly introduced the voltage stability from the angle of the definition and the classification, and analyzed power systems which contains wind farms from the angle of the research contents and methods of static and dynamic voltage stability, especially emphasizing the necessity of the bifurcation theory used in power system contains wind power.
Reliability and Sensitivity Evaluation of the Station Bus Systems Configuration
Authors: Liu Yi Gang , Liao Si Zhe , Liang Jun Hui , Zeng Tong , Liu Zhu
Published: September 2013

The stations work has a close relationship with the reliability of station bus systems configuration, this paper established the index system of station bus systems configuration, discussed the components evaluation model, put forward the calculation based on correlation matrix, and analysis the sensitivity of the components, thus proposed the guiding suggestion to improve the reliability of station bus systems configuration. The example demonstrated the validity and practicability of the method.
Research on FBG Vibration Sensing Technology
Authors: Yang Zhi , Liu Wei , An Ting
Published: September 2013

With the progress of fiber grating sensing technology, FBG gradually become high-performance vibration sensor and has been widely used in vibration detection. Vibration sensing signal demodulation is the key technology for fiber Bragg grating sensing system. This paper details several fiber grating vibration sensor demodulation techniques and gives experiment result.
Research on the Cost Management of Construction Machinery Based on Lean Thought
Authors: Zheng Qian Qian , Zhang Yun Ning
Published: September 2013

In recent years, with the continuous improvement of construction mechanization, construction machinery has become important business productivity in construction enterprise. If who wants to gain advantages in the fierce competition in the market, the most fundamental method is under the premise of quality assurance,implementing comprehensive cost management, using minimal input to gain the maximum output, and creating the maximization economic profit. In view of the important position of construction machinery in the construction enterprise, and the influence of cost, the paper puts forward to lean thought, establish construction project cost control management pattern, built a system of value flow, specific measures on reducing construction machinery cost for increasing the enterprises production efficiency and economic benefit.
Core Variation in the Entrance Region Flow of Casson Fluid in an Annuli
Authors: Kandasamy A. , Pai Rekha G.
Published: September 2013

The entrance region flow of a Casson fluid in an annular cylinder has been investigated numerically without making prior assumptions on the form of velocity profile within the boundary layer region, which is determined by a cross sectional integration of the momentum differential equation for a given distance from the channel entrance. Using the macroscopic mass balance equation, the thickness of the core has been obtained at each cross section of entrance region of annuli for different values of Casson number and for various values of aspect ratio.
Simulation on Active Disturbance Rejection Control
Authors: Zhang Wei , Cai Ying Bo , Wei Xue Tong
Published: September 2013

A highly robust active disturbance rejection controller (ADRC) is developed in this paper. The proposed ADRC consists of a tracking differentiator (TD) in the feed forward path, an extended state observer (ESO), and a nonlinear state error feedback control law (NLSEF) in the feedback path. The control theory, the structure of ADRC and the controller design are presented. LabVIEW is used for modeling, simulation and analysis of the dynamic system. Simulation results show that the proposed ADRC has excellent control performance, especially outstanding adaptability and robustness external disturbances and model uncertainties.
The Control System Method Design for the Three-Phase Inverter Parallel Using CANOpen Protocol
Authors: Guo Dan , Li Jun Fang
Published: September 2013

This paper proposed a new control system design scheme for three-phase inverter parallel. The scheme combined the distribute logic control method and the droop control method, which has been got from the talk about the traditional three-phase inverter parallel methods. The control system is based on TMS320F2812 DSP, and the interface implementation method is presented. As the data exchange method between the inverters, the communication protocol for this system based on CANopen protocol has been given and the parameters for communication map and object dictionary is also given. The method proposed in this paper has been used in the lab, and the successful use has proved that this method can meet the requirements for the processing speed, communication speed, and flexibility of three-phase inverter parallel control system.
The Ignition Advance Angle Control of CNG Automobile Based on BP Neural Network
Authors: Chen De Hai , Chao Wei Feng
Published: September 2013

Compressed natural gas (CNG) automobile is an emerging new energy car. How to optimally control the ignition advance angle of engine is the key technology of CNG electronic control system. At present, the control based on the MAP graph is used usually, but this control method has some shortages, for example larger data, poor adaptive capacity and difficulties in data updating. BP neural network control has adaptive and self-learning, nonlinear processing ability and high generalization, and faults tolerant ability in processing information. In this paper, BP neural network is used to control natural the ignition advance of engine in order to solve the shortages of the MAP picture control. Simulations experiment shows the feasibility and advantage of this method.
Distributed Control in Waterflow-Like Locomotion for UBot Modular Robot over Uneven Terrain
Authors: Zhu Yan He , Bie Dong Yang , Wang Xiao Lu , Yin Jing Chun , Zhao Jie
Published: September 2013

Distributed control, represented by Cellular Automata (CA), has advantage over centralized control for Modular Self-Reconfigurable Robot (MSRR) in capability of extension, efficiency and robustness. But due to the fact that the modular constraints, e.g., the number of DOF and the physical geometry, etc., the ideal CA rules cannot be implemented on the real robot system easily. The goal of the research is on design and implementation of distributed control based on integrated module design and CA rules arrangement. 2-DOF cubic-shaped modular model is first proposed, that is the Ubot module. Cellular rules are arranged according to the locomotion property of UBot module, and distributed control algorithm is designed for the robot to cross the uneven terrain. In simulation and on physical robotic hardware platform, experiments are carried out for UBot to verify the validity of CA theory applied on reconfiguration locomotion of UBot MSRR systems in complex environment.
Experimental Investigation and Mathematical Modelling for Surface Roughness of Drilling on GFRP Composites
Authors: Manickam Shanmugasundram Sureshkumar , Damodhiran Lakshmanan , Veluchamy Arunkumar , Kathirvel Vignesh , Thirugnanam Vinothkumar
Published: September 2013

Glass Fiber Reinforced Plastics composites have an increased application in recent days, due to its enhanced structural properties, Mechanical and thermal properties. Drilling of holes in GFRP becomes almost unavoidable in fabrication. The heterogeneous nature of this kind of materials makes complications during machining operation. However, drilling is a common machining practice for assembly of components. The quality of holes produced in the GFRP material is severely affected by surface roughness, Circularity and Delamination. The objective of the study is to apply the Taguchi method and ANOVA to achieve an improved hole quality considering the minimum surface roughness through proper selection of drilling parameters. The regression method is employed in the Experimental investigation and Mathematical modelling of drilling of GFRP material using HSS drill bits.
Intelligent Control for Mobile Robot Path Tracking Based on Advanced PSO
Authors: Cheng De Fang , Han Hui Shan , Liu Hai Fen , Ji Jing Wei
Published: September 2013

The four-wheeled mobile robot driving by rear-wheel has some characteristics such as nonholomic constraint, complex model and nonlinear and time variability of steering system. An intelligent PID path tracking method based on preview follower theory was proposed, which acquired by improved particle swarm optimization algorithm, and the self-tuning of control of system was achieved. The result indicated that the mobile robot controlled by the proposed approach can follow various reference paths accurately and robustly. Compares to conventional PSO control method ,possesses the advantages of high precise ,great adaptability and robustness.
Study on Band-Gap Characteristics of EBG Material and its Application in Microstrip Antenna
Authors: Wang Zhong Qing , Peng Li Dan , Li Bao , Xu Rong Sen
Published: September 2013

In this letter, the characteristics of electromagnetic band-gap (EBG) material are studied, and then a novel microstrip antenna is proposed by using EBG structure. The antenna is constituted with loading the EBG structure into the dielectric substrate. The size of microstrip patch in EBG antenna with the coaxial feed is only 0.22×0.22 whereis the free space wavelength at 5.22 GHz, which the microstrip antenna is designed by the technique of patch grooved and short pin. The simulation results show that the EBG antenna has two resonant frequencies at 5.22GHz and 5.68GHz, the gains of them reaching to 5.32dB, 4.98dB respectively. Moreover, it has a good impedance matching in 5.14GHz~5.86GHz, which covers two bandwidths of WLAN.
Reconfigurable Switch Software Platform Technology and its Application in Electric Power Communications Access Device
Authors: Huang Hui , Yu Hai , Yu Qiang , Zhang Zeng Hua
Published: September 2013

Communication Access Network of Electric Power System is the key of Communications Network for Smart Grid. There are kinds of access technologies of Telecommunications for Electric Power System. However there is not a unified software platform for electric power communication access devices based on these technologies. So it cannot be adapt to the rapid development of electric power communication equipment, communication test, flexible configuration, and also cannot be quickly adapt to changes in the electric power communication needs. This paper introduces Reconfigurable Switch Software Platform (RSSP) s design, analyzes the architecture of RSSP in detail. As an example, this paper also proposes an implementation scheme of OLT based on RSSP.
Design of Radar Echo Signal Processing System Based on FPGA and DSP
Authors: Chen Yu , Xu Qiong Qiong , Leng Jian Wei
Published: September 2013

This paper presents a kind of design scheme about radar echo wave signal processing system based on digital signal processor (TMS320C6416) and FPGA (EP2C8Q). This scheme is used to timely monitor radar echo data and then calculates it. Distance of target items can be obtained by this method. Take advantage of flexibility and easy-processing complicated data of FPGA and DSP, we promote property of this system to a large extent
Design of the Remote Control Car System Based on Brain-Computer Interface
Authors: Li Jian Yi , Wang Hui Juan
Published: September 2013

In this paper, the basic concept and research status of BCI is introduced. After having analyzed properties of EEG, the required EEG characteristics information suitable for BCI system are selected. This information is amplified, processed, extracted and classified into control commands needed by BCI system, the external device communication and control, and finally communication and control of external devices is implemented.
Heat Meter Calibration Device of Flow Control Based on Self-Learning Double-Controller
Authors: Li Yu Sen , Feng Deng Chao
Published: September 2013

This paper use automatic flow control and select advanced flow control technique with intelligent flow control algorithm. It implements full automatic control of the flow, in the process of verification, only need to set the current flow point and start the system, it will control flow automatically. The control curves meet control requirements, and improve system control precision.
Research on Car Weighting Test System
Authors: Zhang De Min , Liu Hong Jin
Published: September 2013

The car weighting test system provides a good method to improve the comfort felt in car by passengers. It uses force sensors to measure the car load based on a optics-mechanical system that measure the displacement of an steel part which is proportional of the applied weight force.
A Research of Short Trip Based on Driving Cycle
Authors: Shi Min , Wan Ren Jun , Wei Ke Xin
Published: September 2013

This paper chooses short trip to study after comprehensive understanding synthesis of the driving cycle. It introduces the data acquisition and analyzes the advantages of the taxis as test vehicles. Then it preprocesses the original data to make the convenience division of short trip. At last it screenes the candidate short stroke according to the actual conditions. The realization of data preprocessing as well as division and screening of short trip through computers is based on the MATLAB software programming.The results of the short trip can be directly used for the follow-up study and synthesis of the driving cycle.
Ecological Research of Ownership Drive Train in the Real Traffic with the Engine Parameters Registration
Authors: Bajerlein Maciej , Merkisz Jerzy , Daszkiewicz Pawel
Published: September 2013

The paper discusses the issues related to the measurement of the operating parameters of a conventional engine and the parameters of a conventional bus in motion. The measurements were performed under actual traffic conditions of a city bus in Poznan. It is noteworthy that on-road tests under actual operating conditions are one of the main trends of the development of the testing methodology and are gradually gaining in importance. Specific conditions were selected to ensure the highest possible reflection of the actual conditions: the traffic similar to the traffic typical of a regular bus route (average traffic on Poznan routes). The tests were performed in the city traffic on a route similar to the actual bus routes of the Poznan bus operator. The tests were conducted for two days (Friday and Saturday), characteristic of very high and very low number of transported people respectively as well as high and medium traffic congestion. During the tests the engine and the driving parameters were recorded continuously as sent from the diagnostic system of the vehicle and the GPS. Based on the exhaust emission level characteristics of the bus fitted with the conventional powertrain the share of the emissions was determined depending on the engine parameters as well as the driving parameters during the whole test. The operating range of the vehicle was within the speeds of 016 m/s (0-60 km/h) and accelerations of 0,3 m/s20,3 m/s2. A great share of the vehicle operation in the urban traffic was at idle (the share amounts to 33%) while for higher speed ranges of 814 m/s the operating time-share was approximately 20%. The authors also performed an analysis of the changes of the exhaust emissions under dynamic conditions depending on the speed of the bus.
Effects of Palm Biodiesel Blends on Fuel Consumption in Fire Tube Boiler
Authors: Komariah Leily Nurul , Arita Susila , Novia Sumardi , Wirawan Soni Solistia , Yazid Muhammad
Published: September 2013

Biodiesel application in boiler is basicly potential due to the combustion system tends to be simpler than compression ignition as performed in diesel engine. The various tests on combustion facilities showed that the use of biodiesel will increase the fuel consumption. This study was conducted in a fire tube boiler, with heat input rate of 60.000 kCal/hr and 3 bars of pressure, using palm biodiesel. A series of test shown that the combustion behavior in boiler was strongly possible influenced by some changes in physical properties of the fuel. The blends was varied in 10, 20, 30, 50 and 100% of biodiesel in mixture with petrodiesel. The fuel consumption was likely similar or slightly lower than petrodiesel when the fuel used in lower blends (less than 20%). In higher blends, the fuel consumption was increased up to 17%. The rate of consumption was relatively lower at average 9,4% in half load mode of the boiler operation rather than full load.
A Numerical Study on Air-Entrainment between a Web and a Convex Guide Roller in a Web Transportation Process
Authors: Jeenkour Puttha
Published: September 2013

This paper presents a characteristic of air-entrainment between a web and a guide roller with modified convex shape. Air film thickness is derived using the modified Reynolds equation, a roller shape equation, and a web deflection equation. A finite difference method and a Newton-Raphson scheme are employed to achieve numerical results, i.e. air film thickness and air pressure distribution profiles, a minimum air film thickness, and an air film thickness at the middle of roller length under varied convex roller shapes. The results show that both minimum and central air film thicknesses decrease when the roller is designed as convex shape, and a parameter of convex roller shape affects a minimum air film thickness position.
Numerical Analysis on Two-Phase Integration of Sludge Thickening and Digestion Reactor Flow Field
Authors: Chai Hong Xiang , Wang Wei Jie , Hu Xue Bin
Published: September 2013

A numerical simulation has been carried out to study the flow field in the two-phase integration of sludge thickening and digestion reactor. The study is based on the solution of the complete NavierStokes equations and RNG k-ε turbulence models using a finite volume technique. The analysis results show that the two-phase integration of sludge thickening and digestion reactor exists some problems such as inlet sludge short flow in the connecting pipe, the lower utilization rate of higher part of outer chamber and uneven recycle in the inner reaction chamber. It is valuable to provide basis and improve design parameters, the two-phase integration of sludge thickening and digestion reactor will get a more ideal flow to improve sludge thickening and digestion effect.
The Stress Analysis on Spur Gear Meshing Simulation
Authors: Li Zheng , Chen Yang
Published: September 2013

The gear meshing is a very complicated process due to the nonlinear behaviors during the teeth contact. It is necessary to build a reliable model to simulate gear meshing process which can consider geometry and boundary conditions nonlinear behavior in gear tooth contact analysis. This paper propose a 3D finite element model to simulate the meshing process of a pair of spur gears, and then carry out the gear tooth contact analysis with the consideration of nonlinear behaviors. The results and relevant discussions will indicate and explain some significant phenomena of the gear tooth contact characteristics in gear meshing process.
Numerical Solution of Compressible Euler Equations by High Order Nodal Discontinuous Galerkin Method
Authors: Ahmed Fareed , Ahmed Faheem , Yang Yong
Published: September 2013

In this paper we present a robust, high order method for numerical solution of compressible Euler Equations of the gas dynamics. Euler equations are hyperbolic in nature. Our scheme is based on Nodal Discontinuous Galerkin Finite Element Method (NDG-FEM). This method combines mainly two key ideas which are based on the finite volume and finite element methods. In this method, we employ Discontinuous Galerkin (DG) technique for finite element space discretization by discontinuous approximations. Whereas, for temporal discretization, we used explicit Runge-Kutta (ERK) method. In order to compute fluxes at element interfaces, we have used Roe Approximate scheme. We used filter to remove spurious oscillations near the shock waves. Numerical predictions for Shock tube problem (SOD) are presented and compared with exact solution at different polynomial order and mesh sizes. Results show the suitability of DG method for modeling gas dynamics equations and effectiveness of high order approximations.
Study on the Application of Virtual Reality Technology in the Production of Industrial Products Based on OpenGL
Authors: Wang Fa Yu , Wang Jing Chao , Lu Baoan
Published: September 2013

This paper mainly discusses the use of virtual reality technology to make the complex steel production environment into direct, simple virtual interface. The model of square steel and the model of cylindrical steel have been founded through object-oriented method and powerful 3D image edit function provided by OpenGL which is employed in this system. Simulation system framework and friendly man-machine interaction are founded using 3-tier application for interactive control. The establishment and maintenance of the steel template, the real-time processing of the temperature in the steel production.
Automation of Parametric Modeling for Grillage Method
Authors: Cheng Shou Shan , Huang Hai Xin , Zhang Ying , Chen Pei
Published: September 2013

For solving the problem of manually dividing section of main girder into grillages, a program is developed using VBA tool in AutoCAD environment, which can automatically search the divided position of grillage for section of single box with several rooms, and obtain characteristics of section of each grillage. Meanwhile calculational data can be stored as a text file, which is convenient to be directly called by commercial structural software. By comparing with the finite element software ANSYS, the reliability of the program and the accuracy of calculational results are verified. The program is ease to be amplified and transplanted owing to using the modularizational idea, and it greatly improves efficiency of setting up grillage model.
The Research of Geometric Rectification of Aerial Image for Miniature Unmanned Aerial Vehicle
Authors: Liu Xiao Gang , Li Jin Li
Published: September 2013

The unmanned aerial vehicle (UAV) aerial technology increasingly been widely used and attention, this paper first describes the cause of geometric distortion of aerial image, and then using Denavit-Hartenberg (D-H) theory on the flight attitude change of the UAV has led to the phenomenon of image distortion analysis, and the establishment of corresponding image geometric correction model. The terrain is relatively flat areas near a school in Guilin as an aerial target area, geometric correction processing the acquired aerial imagery, experimental results show the effectiveness of the method.
Robot Navigation Using a DR/GPS Data Fusion
Authors: Zhang Yuan Liang , Park Jong Ho , Sel Nam O , Chong Kil To
Published: September 2013

Dead Reckoning (DR) is one of the frequently used navigation system for a mobile robot. It provides short term navigation information but its error can accumulate over time without limit. The Global Positioning System (GPS) can be used for localization and navigation outdoors wherein the removal of the SA Policy improved the accuracy of the GPS for civilian use but the error is still quite large. Standard Differential GPS (DGPS) can be used to achieve an error of less than one meter but the costs are prohibitive in terms of commercializing it into the mass market. In this research study, a cheap GPS receiver was used for the navigation system of a mobile robot outdoors in which a new Kalman-filter based DR/GPS data fusion method was utilized. This proposed method is based on the characteristics of the GPS receiver. Fusing the data from the GPS receiver and the DR system provided precise navigation information for the mobile robot. Simulation was performed to check and validate the effectiveness of the proposed fusion method and good results showed its potential for mobile robot navigation outdoors.
A Novel Self-Reconfigurable Modular Robot (M2SBot): Docking Mechanism Design and its Kinematic Analysis
Authors: Ge Wei Min , Lei Ying Lin , Wang Xiao Feng , Zhang Hua Jin , Liu Zhen Min
Published: September 2013

This paper presents a novel docking mechanism, based on a new type of mobile modular self-reconfigurable robot named M2SBot. The paper introduces the design of structure, the principle of work and the feasibility analysis of this mechanism in detail. At last, the simulation of kinematics based on Adams verifies the feasibility of the docking mechanism. The prototype of the mechanism was manufactured by 3D printer.
The Coordinated Control Strategy in Plug-In Hybrid Vehicle
Authors: Wang Wei Hua , Guo Ming Chen , Dong Xiao , Song Rui Fang
Published: September 2013

In this paper,the necessity of the coordinated control is further discussed under state-switch based on the analysis of dynamical characteristics of both engine and motor. The thoughts of torque compensation and powertrain sequence are illustrated with detail and used to build up simulation model.The acceleration fluctuation is used to measure the simulation results of the coordinated control strategy, and it is finally manifested by the simulation results which are got through MATLAB/SIMULINK and CRUISE that the coordinated control algorithm can effectively reduce the fluctuation of vehicle acceleration and ensure smooth power transfer under state-switch.
Research on Fuzzy Control Automotive Electronic Power Steering Characteristic
Authors: Ma Xin Lei , Guo Yong Feng
Published: September 2013

The driving stability and comfort-ability are directly influenced by steering system, and it is a critical component in an automobile. Torsion bar torque sensor signal and the vehicle speed signal are used to calculate the assisting torque that on the motor shaft. The rules about how to calculate desired torque signal is very important for driving portability and stability. Influence of motor control strategy on assisting response characteristic. In this paper adaptive fuzzy control rules is proposed for the assisting characteristic and power motor. Base on assistance characteristic and assistance motor fuzzy control is designed. Fuzzy information processing torque signal, vehicle speed signal, with MATLAB simulation contrast experiment, and the result validation the fuzzy controller.
Simulation and Research of Pressure-Flow Compound Fault-Tolerant Control Module
Authors: Zhao Ru Xiong , Zhang Jian Quan , Huang Guo Qin
Published: September 2013

In this paper, a kind of pressure-flow compound fault-tolerant control module based on Knowledge Modules of Hydraulic Fault (KMHF) is designed rationally. The simulation analysis of the pressure-flow perceptible control module based on KMHF has been made and the fault-tolerant properties of the pressure-flow perceptible control module have been studied. By analyzing the simulation results, it turns out that the pressure-flow compound control module based on KMHF as a new hydraulic fault-tolerant technology present in this paper can improve the reliability and safety of practical hydraulic system and has important application value.
Automatic Control System Design and Implementation of Wastewater Treatment
Authors: Song Xiao Jing
Published: September 2013

This design in certain food products factory for intelligent control of wastewater treatment processes, monitoring and management. The system consists of lower and upper computer. The lower-level computer consists of PLC and the intelligent instruments. The intelligent instruments can process control the frequency conversion timing machine, opening valve and so on. The PLC can receive all data from the controlling instruments of the upper-level one. Eventually MCGS configuration software, real-time monitoring of wastewater treatment processes and changes of analog. So as to realize combination of automatic and manual control, field and remote control with the combination of purpose.
An Algorithm for Explicit Solution of Min-Max Model Predictive Control
Authors: Gao Yu , Zhang Mao Qing , Chong Kil To
Published: September 2013

In this paper, the explicit constrained min-max MPC problem is solved by an algorithm which is based on a discrete-time linear system with uncertain disturbances. Since the maximum of the quadratic cost function is only attained at extreme point of the disturbance set, the designed method is proposed in two different kinds of active extreme point sets, which correspond to two kinds of state regions. As a result, the state space is partitioned into polyhedral regions and a piecewise linear feedback control law has been defined over resulting cones.
A Control Methodology for Autonomous Multi-Agent System in Collective and Uniform Distribution and Reorientation
Authors: Yang Tao , Jia Yong Jun , Yang Li Bo
Published: September 2013

This paper proposes a decentralized control law of NlCyP&BG for a team of autonomous agents, which aims at achieving collective and uniform distribution around an appointed destination. A technique by virtual of coordinate constraints is described for eigenvalues derivation and contribution analysis, so that conditions for local asymptotical stability of n-agent system is deduced. Simulation work on a two-agent case and an extended four-agent case are displayed to prove the validity of stability conclusion, and at the same time the effectiveness of control law in accomplishing expected distribution and reorientation is verified exactly.
The Application of Safety Monitoring System of Crane Based on DM3730
Authors: Leng Jian Wei , Dai Shai
Published: September 2013

Data acquisition is one of the processes to obtain the signal information. This paper designed a data collection system which is based on ARM Cortex-A8 processor for traditional crane, to acquire position signals and alarm signals. The results will be transmitted through RS232 serial communication bus to the receiver, then be displayed, so the field signals will be real-time monitored, the operations to the crane will be safe.
Study on the Characteristics of the Maglev Electromagnet Considering the Magnetic Field Induced by Eddy Current
Authors: Chen Gui Rong , Zheng Li Li , Zhou Dan Feng
Published: September 2013

The rails of the medium-low speed maglev system are entirely manufactured by roller milling, and eddy current in the rail can be induced when relative movement between the electromagnet and the rail manifests. The eddy current reduces the magnetic field in the air gap between the electromagnet and the rail, which, as a result, decreases the levitation force; and higher speed will cause more levitation force lost. Moreover, the eddy current produces a drag force which is opposite to the propulsion force generated by the linear inductive motor. In this paper, based on the electromagnetism, the formulae for the levitation force and the drag force of the electromagnet are deduced when the eddy current in the rail is taken account. Simulations based on the model of the maglev vehicle on the Tangshan maglev test line are also performed. The results indicates that the levitation force is significantly affected by the eddy current in the rail, and when v = 200 km/h, the levitation force of a single electromagnet is reduced by 35.6%; meanwhile, the drag force increases dramatically as the speed increases, but when the speed exceeds 100 km/h, the drag force stops increasing, and it equals 2.28% of the stationary levitation force.
Tensile Properties and Fracture Toughness of Three Rubber-Modified Epoxies
Authors: Wu Helen
Published: September 2013

This paper investigates the tensile properties and fracture toughness of a liquid rubber-modified highly crosslinked epoxy cured using 4,4 diaminodiphenyl sulphone (DDS/LR). The results for DDS/LR epoxy in relation to rubber and matrix properties are also compared with those of rubber-modified lowly crosslinked epoxy systems, namely, liquid rubber-modified piperidine cured epoxy (Piperidine/LR) and core-shell-rubber modified piperidine cured epoxy (Piperidine/CSR). It was found that highly crosslinked DDS/LR epoxy has a higher tensile strength than that of either Piperidine/LR or Piperidine/CSR epoxy, while it shows only a moderate increase in the fracture toughness.
Model of Metal Halide Lamps and Harmonic Analysis Based on PSCAD/EMTDC
Authors: Gu Zhi Peng , Zeng Jiang
Published: September 2013

Metal halide lamp (MH) is widely used in stadium lighting because of its significant advantages. But this high-intensity gas discharge lamp circuit contains the arcand such negative resistance characteristics lead to harmonic current. In addition, electronic ballasts of MH with rectifier circuit and inverter also produced a large number of electrical harmonics, becoming the main harmonic sources. In this paper, piecewise linearization method is used to establish the electrical model of 2500W metal halide lamp and a three-level model of electronic ballasts with the PSCAD/EMTDC. This paper analyzed the grid side harmonic current when the model is running. Comparing the simulation results to the measured data of Shenzhen Universiade venues lighting circuit, we can verify the accuracy of the model.
Contactless OLTC Technology Based on Inductive Load
Authors: Tu Jin Long , Pan Cai Xia
Published: September 2013

This paper studies the fast On-Load Tap Changer (OLTC) technology of contactless switch without transition resistance or transition reactor. It not only provides the equivalent circuit of OLTC, the impact current calculation formula and the OLTC simulation waveform based on the inductive load but also supplies with the main electrical circuit and the waveform recorded in the experiments. The MJN3 contactless voltage-controlled power source has been developed with MCT801D intelligent module, which can accomplish to rapidly switch in voltage-controlled gears based on the inductive load. Its output current is continuous with no impact, no over-voltage and voltage-drop, which can achieve the high performance and high reliability.
Risk Assessment for AC/DC Hybrid Power System
Authors: Zhou Bao Rong , Jin Xiao Ming , Chen Jian Bin , Wang Xin Ze , Zeng Yuan
Published: September 2013

According to the structure and characteristics of HVDC system, this paper used the FTA (fault tree analysis) method to divide fault results of DC system into five transmission capacities: 0%, 25%, 50%, 75% and 100%, calculated results by incorporating DC system into AC system and used Monte Carlo simulation method to evaluate reliability of AC/DC hybrid system. Whats more, this paper established the model, algorithm and index system for risk assessment of AC/DC hybrid power system and developed corresponding software. Finally, an example was given to prove the correctness and validity of the proposed algorithm and software.
Energy Balance Analysis on the Slow Pyrolysis Process of Cattle Manure
Authors: Liu Xuan , Li Zi Fu , Zhang Yao Zhong
Published: September 2013

Energy balances are increasingly used to assess the energy efficiency and productivity of production. In this study, energy balances for the slow pyrolysis process of cow manure were calculated. The results show that, for cow manure dry matter, all the recovered energy value from the pyrolysis process products is about 12 times of the energy needs for the dry matters pyrolysis process. But the moisture has a noteworthy impact on the energy efficiency. When the input moisture is 60.85%, the recovered energy value from all products is approximately equal to the process energy consumption, and if only using non-condensable gases (NCG) as the energy resource, the input moisture should lower than 36.63%. Meanwhile, if the vapor could be separated in the beginning phase of pyrolysis process, the energy efficiency will be greatly improved, e.g. if removed all water vapor out the system at 423K, the former two data could be 71.43% and 48.18%, which is 10.58% and 11.45% higher than the process without vapor separation handling.
Day-Ahead Generation Scheduling System Design of Jibei Power Grid
Authors: Xu Jian Fei , Wei Zhong Kang , Wang Yu Lin , Yu Peng , Li Li Li
Published: September 2013

Generation scheduling is one of the major contents of power dispatch and has an important impact on the safe and efficient operation of power grid. As a newly-established provincial power grid, Jibei power grid bears features like multiple regional wind power installations and high rate of external power receiving, etc., and it urgently needs to develop a secured and economic power scheduling system with comprehensive consideration of various constraints. Aiming at features of Jibei power grid, this paper gives an overall design scheme of the day-ahead power scheduling system. The application indicates that this system can efficiently optimize generation schedule and power flow distribution, intensify the decision ability and intelligence level of power dispatch.