bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Response Surface Model on Aerodynamic Characteristic of Airfoil
Authors: Liu Cheng Long , Zhu Hui , Yang Zhi Gang
Published: August 2014

To reduce the computational resources, experimental design and response surface method (RSM) were employed to investigate the aerodynamic drag coefficient (CD) and lift coefficient (CL) of airfoils by using CFD methods. The selection of sample points, development and validation of response surface model and the effects of different sample points on approximation model were discussed. The results indicates that the number and distribution of sample points have a significant impact on model accuracy and optimize results. Also this method can greatly reduce calculation amount.
The Research of the Hybrid Volume Rendering Algorithm Based on GPU Technology
Authors: Xiang Jian Jun , Deng Fei , Ning Tian Xin
Published: August 2014

Volume rendering is a kind of important technology of 3D data volume rendering, which can display the internal structures and the shapes of the data cubes more vividly than the surface rendering and the technique for surface extraction from a volume. However, volume rendering algorithm is very complex, in order to solve the efficient problem of volume rendering of massive data,this paper introduces the real-time volume rendering technology which is based on GPU acceleration, and puts forward a method of fast hybrid volume rendering based on FBO to solve the problem that the data and the conventional primitives can be rendered on the same screen. At present, this method has been applied to the three-dimensional geological interpretation of comprehensive mapping system, which realizes that the three-dimensional attribute body and stratigraphy, fault surface can be shown at the same time, and improves the quality and efficiency of the interpretation work.
Construction of an International IT-Driven Sharing Platform for Inheriting and Communication of Dongba Manuscripts
Authors: Xu Xiao Li , Wu Guo Xin , Wang Hong Jun , Chen Tao
Published: August 2014

Dongba hieroglyph among Naxi ethnic minority is the only globally recognized hieroglyph still in use. Dongba ancient manuscripts are registered on the list of Memory of the World by UNESCO. In order to secure the inheritance and communication of Dongba Manuscripts, we analyze the obstacles encountered in the process of inheritance and communication. We apply IT to construct a digital and network-oriented international Dongba Manuscripts information sharing platform to collect, sort out, extract and disseminate digitalized information of Dongba Manuscripts hieroglyph. Environment and technology support should be provided to carry out remote academic research and exchanges through the international sharing platform. Efforts should be made to seek digital channels to rescue and inherit Memory of the World, Dongba Manuscripts.
Data Warehousing and Data Mining Technology Implementation in Jpeen_CRM System Design
Authors: Ding Heng , Zhang Qian Yuan , Wang Yan Ping , Jiang Yan
Published: August 2014

In this paper, on the basis of in-depth study of data warehouse, OLAP, data mining and other key technologies, according to the characteristics of the Jpeen customer relationship management (Jpeen_CRM), developed a Web-based customer relationship management system. First of all, research the demand for Jpeen company and create Jpeen_CRM data warehouse. Second, create the OLAP multidimensional cube which is applied to the analysis of customer transactions. Using the decision tree algorithm to create mining models for customers to choose glasses, and gives pruning optimize decision tree. Using decision tree to classify users and recommend them the hot products they prefer. Finally, realize the Jpeen_CRM on J2EE platform, provide a decision support for Jpeen company to better serve customers and make the company itself have the advantages in a competitive environment.
Joint Energy-Efficient Resource Allocation Scheme for AF-Based Multi-Relay OFDM Networks
Authors: Zhou Zhi Kang , Zhu Qi
Published: August 2014

In this paper, a joint resource allocation scheme for energy-efficient communication in cooperative orthogonal frequency division multiple (OFDM) networks based on subcarrier pairing (SP) is studied. The problem aimed at maximizing the system energy efficiency (EE) is formulated into a mixed-integer nonlinear programming (MINLP) problem. To solve the complex MINLP problem, we simplify the optimizing model as a typical fractional programming problem by defining the equivalent channel gain, thus Dinkelbach’s method consisting of outer iterations and inner iterations can be used to find the optimal solution to the MINLP problem proposed in polynomial time. Simulation results show that the proposed scheme can improve the system EE and ensure the quality of service (QoS) of users.
Application Analysis of TD-SCDMA & Wi-Fi Inter-Working Solution for Coal Mine Industry
Authors: Wang An Yi , Li Yu Jing , Yu Zhen Hua
Published: August 2014

The coverage and capacity of high speed data service in coal mine hot spots is not sufficient in present TD-SCDMA communication system. This paper proposes a TD-SCDMA & Wi-Fi network interworking solution , utilizing the high speed data transport of Wi-Fi network on the foundation of TD-SCDMA system. The results show that the solution is feasible and effective .
The Application of Partial Response Window in OFDM Systems without Guard Interval
Authors: Zhang Li Jun , Wang Yu , Zhu Qiu Yu
Published: August 2014

The guard interval (GI) filling with cyclic prefix (CP) is inserted in the conventional orthogonal frequency division multiplexing (OFDM) system in order to be free of the inter-symbol interference (ISI). The frequency spectrum leakage out of band is mitigated by using the time-domain windowing method. Meanwhile, the GI-free OFDM have been studied in order to achieve high efficiency of bandwidth usage. This paper addresses the windowing method of partial response function for this case. It is shown that the information data can be detected precisely and the frequency spectrum leakage is mitigated without loss of bandwidth efficiency.
The Research of DV-HOP Positioning Algorithm Based on RSSI Calibration
Authors: Cao Jie , Chen Mu
Published: August 2014

Because of the DV-HOP algorithm in wireless sensor network (WSN), the first jump range error, which affect the positioning error of the whole node network problems. This paper puts forward an improved algorithm is proposed. The algorithm is mainly using the RSSI ranging technology, in the process of DV-HOP first jump range through correction of RSSI ranging technology, to reduce the distance measuring error, in order to improve positioning accuracy. The simulation results show that compared with traditional DV-HOP algorithm. The improved algorithm can without additional hardware and computation under the premise of improving positioning accuracy.
A Novel Algorithm for Long Pseudo-Code Acquisition in Spread Spectrum Communication System
Authors: Ren Chun Hui , He Zhong Quan
Published: August 2014

The capture of long Pseudo-Code code is the most important technology in spread spectrum system. we use XFAST,AVERAGE to solve this problem in old days. A new algorithm is proposed which based on the time domain samples and binary search according the autocorrelation of the Pseudo-Code (PN code) and improve the speed of the capture of long Pseudo-Code code in spread spectrum system. Firstly, received spread spectrum signal's simple rate is reduced to a quarter of the chip rate and determine with a specific method, then divide the local PN code into four parts and accumulated to a new sequence. finally, the synchronous pseudo-code is captured with the correlation of the two new reference sequences. Compared with conventional methods such as XFAST, capture time and precision are improved.
Simulation Implementation and Analysis of the Performance of M-QAM by Using MATLAB
Authors: Yang Li Ming , Guo Jia , Ding Hong Wei , Wang Yong , Li Hong Mei , Shao Han Bai
Published: August 2014

For the implementation of digital multimedia communication, an efficient, reliable, deterministic transmission system plays a vital role. Quadrature amplitude modulation (QAM) is commonly used in digital communication systems. We focuses on simulation and analysis of M-level QAM by using MATLAB in this paper.
The Model of Routes Design Based on Optimization Theory and its Implementation
Authors: Ma Quan Dang , Jiang Fu Cai , Jiao Zhan Li , Yang Kun Zan
Published: August 2014

Based on the basic principles and influencing factors of analyzing routes design, this paper establishes a novel mathematical model for optimal control of routes design with the help of optimization theory. On the condition of satisfying its constraints, the article applies genetic algorithm to process algorithms implementation on the established routes design model. It also further illustrates the feasibility and practicality of routes design model in maritime practice by verification.
Triboluminescent Material for Short Wave Emission Effect and the Tribological Mechanism
Authors: Zhou Qiang , Xu Rui Qing , Xu Shu Yan
Published: August 2014

Material properties in the process of tribo-emission decides the characteristics of both spectra and intensity of triboluminescence. ZnS:Mn semiconductor material was proved to be a high emission triboluminescent material in many investigations; Ce- and Yb-doped hexacelsian possess the excellent shortwave triboluminescence character due to f-d electronic transition of doping element with position valances ions; the fracto-mecha-luminescence and photoluminescence spectra of phthalic acid, 4-hydroxy coumarin monohydrate, etc. present obviously a broad ultraviolet and violet waveband emissions, showing the disadvantage of these organic crystals as shortwave triboluminescence materials. Triboluminescence test apparatus of drop tower type have the tribo-emission of impact friction effect; the pin-on-disk type apparatus can perform the triboluminescent experiments with sliding friction mechanism; the twin ring tribometer is used to measure the triboluminescence of polymer material friction rings. These units supply a suitable conditions for obtaining triboluminescence with shortwave emission and persistent high intensity.
Methodology and Application of the Kruskal-Wallis Test
Authors: Ostertagová Eva , Ostertag Oskar , Kováč Jozef
Published: August 2014

This paper describes the methodology and application of the very popular nonparametric test which is a rank based test named as Kruskal-Wallis. This test is useful as a general nonparametric test for comparing more than two independent samples. It can be used to test whether such samples come from the same distribution. This test is powerful alternative to the one-way analysis of variance. Nonparametric ANOVA has no assumption of normality of random error but the independence of random error is required. If the Kruskal-Wallis statistic is significant, the nonparametric multiple comparison tests are useful methods for further analysis. The statistical analysis of the application data in this paper was performed with software MATLAB.
Modelling a Liquid Material in Drop Test Simulations of a Cask for Liquid Radioactive Waste
Authors: Ivančo Vladimír , Orečný Martin
Published: August 2014

The aim of this paper is the comparison of different material models for the simulation of fluid impact on a cask for transport of radioactive liquid material. Simulated is a 9 m drop test performed according to International Atomic Energy Agency regulations. In order to reduce computational time, proposed is to model the transported fluid as a hypothetic linearly elastic material. This enables us to use less time demanding FE explicit dynamic analysis based on Lagrange formulation only instead of combination of Lagrange and Euler formulations. Compared are the results obtained for three elastic material and three fluid models based on different equations of state.
Drive Dynamic Analysis – The Key to Optimal Drive Performance
Authors: Formánek Ivo , Farana Radim
Published: August 2014

The paper presents concept and application of mathematical and simulation model of variable-speed drives (hereafter VSD or VSDs). The models were/are used in rolling mills engineering, commissioning and maintenance. The VSDs are the main actuators there. In order to reach optimal performance in terms of material tolerances, wear and tear, and reliability it is necessary to have good VSD control which meets not only technology targets but also properties of the VSD mechanical train (set of motor rotors, shafts, gear boxes, couplings, clutches, spindles, working and backup rolls, etc.). Only the optimal VSD control and appropriate operation and maintenance can ensure trouble-free operation and long lifetime of the VSDs. We have been dealing with the VSDs models since 1990. Since then we have used the models in many practical applications. Currently, we concentrate mainly on an optimal and advanced interstand section control. Apart from various PID control strategies, also Fuzzy control has been tested and analyzed. The paper mentions some of our experiences we have achieved in this area.
Integrated System of Mixed Virtual Reality Based on Data Glove CyberGlove II and Robotic Arm MechaTE Robot
Authors: Kováč Juraj , Ďurovský František , Varga Jozef
Published: August 2014

Proposed paper describes development of CyberGlove II - MechaTE low-cost robotic hand interface intended for future use in virtual and mixed reality robot programming. The main goal is to explore possibilities and gain programing experience in controlling mechanical hands by means of data gloves and its interconnection to virtual reality modeling software. First part of paper describes recent progress in using virtual reality for purposes of intuitive robot programming; second part includes an overview of recent development of mechanical hands construction, as well as currently available data gloves. Last part provides details about CyberGlove – MechaTE interface and its potential for methods of intuitive robot programming in virtual or mixed reality environments.
Puck Collecting Robot
Authors: Kelemen Michal , Salovka Tomáš , Kelemenová Tatiana , Virgala Ivan , Miková Ľubica , Maxim Vladislav , Duchoň František , Kuryło Piotr
Published: August 2014

The paper deals with design of robot for puck collecting. Puck collecting is a competition category at RobotChallenge. The aim of this competition is to find and collect pucks with defined color (blue or red) and place them to home position with the same color. The robot has a two-wheeled undercarriage with differentially driven wheels. The robot works as an autonomous system and it has two microcontrollers for parallel controlling of processes. The robot is able to find and recognize the puck and place it to home position defined with the same color. The designed robot Tukebot attended the competition RobotChallenge 2012.
Stress Analysis of the Thin-Walled Vessels
Authors: Delyová Ingrid , Sivák Peter , Hroncová Darina , Kováč Juraj
Published: August 2014

This article focuses on the analysis of stresses within a thin-walled vessel. Focused on rotary symmetrical shell, boundary faults arising at the junction of the cylindrical part of the vessel and its bottom are monitored. The bottom of the vessel is designed in three variants and obtained values of stresses are compared. From the obtained results it is possible to assess which form of the bottom is preferred.
An Improved Heat Equation for Fully Coupled Thermal-Structural Finite Element Analysis Using Small Strain Formulation
Authors: Écsi Ladislav , Élesztős Pavel
Published: August 2014

In this paper an improved heat equation for fully coupled thermal structural finite element analysis is presented. In the problem solving process, mathematical formulation appropriate strain measures describing the onset and the growth of ductile and total damage and heat generation rate per unit volume for dissipation-induced heating have been employed. The model was implemented into a finite element code using an improved weak form for fully coupled thermal structural finite element analysis, an extended NoIHKH material model with internal damping for cyclic plasticity of metals capable of modelling ductile material behaviour in wide range of strain rates. A notched aluminium alloy specimen in cyclic tension using 2Hz excitation frequency and linearly increasing amplitude has been studied. The model verification showed excellent agreement with available experiments. A few selected analysis results are presented and briefly discussed.
Analysis and Evaluation of Differences Dimensional Products of Production System
Authors: Božek Pavol , Pokorný Peter
Published: August 2014

Logistics is primarily to address issues with whose functional, organizational, personnel and material means can be improved and optimize the entire course material flow businesses, which shall logistics integration business functions. Production logistics means a sum of logistical tasks and measures for preparation and execution of the production process. Includes all activities associated with material and information flows of raw materials, auxiliary and production materials from the warehouse to the production of raw materials and semi-finished goods from the warehouse and purchased parts through the various steps of the manufacturing process including all buffer stores, through the installation of the finished goods warehouse.
Composites and Reinforced Plastics in the Automotive Industry
Authors: Bielefeldt Karol , Walkowiak Janusz , Papacz Władysław
Published: August 2014

The paper presents the possibility of using polymeric materials in the automotive industry. Some of the requirements for materials have been discussed and the possibilities of a significant increase in strength of the materials by the use of reinforcements have been indicated. Numerous examples of applications of reinforced plastics as automotive parts have been presented. Some of the latest technologies that enable the production of automotive parts from reinforced plastics, including hybrid structures, have been described.
Methodology for Classification of Material Items by Analysis ABC/XYZ and the Creation of the Material Portfolio
Authors: Pekarčíková Miriam , Trebuňa Peter , Fiľo Milan
Published: August 2014

The nature of the application of ABC/XYZ analysis lies in the use one of the simple tools of quality management. It is based on the Pareto Principle 20/80. It can be applied in a variety of modifications and various areas of the production value chain. This article is formulated as a case study of ABC/XYZ analysis in practice and its contribution to the development the company material portfolio.
Photoelast Method and Possible Applications of Mathematical Statistics in Prediction of Stress State of Structural Elements
Authors: Ostertag Oskar , Ostertagová Eva , Frankovský Peter
Published: August 2014

The presented article is dedicated to stress state development while assessing the concentration of stresses in samples with continuously changing notches. These samples represent connecting elements of structural parts. The stress states of selected samples were determined experimentally by means of reflection photoelasticity. This method is suitable mainly for determination of stress state in the whole area in question, predominantly though for the analysis of stress concentration and its gradient in the notched area. Within the method of reflection photoelasticity, a layer was used to analyse the stress field. When loaded, this layer exhibits the ability of temporal birefringence. One of the statistical methods was selected in order to predict the stress state of other samples with bigger notches.
Residual Stress Prediction Using Neural Network Approach
Authors: Menda František , More Marcel , Cardona-Cuervo G.P. , Martinez-Tabares F.J.
Published: August 2014

Procedures for residual stress evaluation by using Ring-Core method have not been standardized. Most common techniques are derived from the ones used for similar semi-destructive hole-drilling method. The differences between research approaches can cause significant errors. New approach using neural network is proposed as a more adaptive way for residual stress evaluation than the commonly used methods.
Laboratory Experiment of New Cutting Materials in Milling Processes
Authors: Vilček Igor , Kováč Jozef , Janeková Jaroslava
Published: August 2014

The development of manufacturing technology is mostly given by economics, environmental trends and the development of cutting materials and machine tools. Manufacturing is a significant part of the worldwide economy. Machining (material removal processes) represents major part of production costs. This paper yield inquiries into the hard and precise milling with a focus on force effects in experimental machining, tool wear and final surface qualities (roughness, micro hardness). The precision machining of hardened steel differs from conventional machining in terms of the hardness of the workpiece materials and the cutting tool materials that are required. Hard materials are characterized by high hardness (> 45 HRC) and abrasiveness. Machining processes require cutting tools of much higher hardness and also higher resistance of the abrasive wear. Recently developed cubic boron nitride (CBN) and coated sintered carbides cutting tools are considered to have the ability of cutting such as steel. CBN cutting tools show good performance during machining of the hardened steel because of their hot hardness and good fracture toughness.
Modal Analysis of the Manipulator Arm on the Mobile Chassis
Authors: Hagara Martin , Trebuňa František , Huňady Róbert
Published: August 2014

In the contribution an experimental modal analysis of the manipulator arm on the mobile chassis is described. For an assessment of modal parameters the conventional mechanical transducers of acceleration were used. The natural frequencies as well as the magnitudes of displacements were investigated at two different static robot modes – without stabilization of the chassis and with stabilization of the chassis, respectively. The measurements were also performed by the simulation of robot effector loading.
A Comparison of Modern and Classical Experimental Methods of Mechanics in Strain Investigation
Authors: Pástor Miroslav , Hagara Martin
Published: August 2014

In this contribution a comparison of the results of deformation analysis performed in a classical way using strain gage and modern way, when a non-contact digital image correlation method was used, is described. Both methods were applied simultaneously for the investigation of the aluminum sample with stress concentrators loaded by tension, what prevented the investigation by different conditions. The contribution includes also the comparison of the results obtained using digital image correlation method by different levels of smoothing filters, which the software delivered together with correlation system contents.
An Investigation of the Temperature Influence on a Shift of Natural Frequencies Using Digital Image Correlation
Authors: Hagara Martin , Schrötter Martin , Lengvarský Pavol
Published: August 2014

The contribution describes an original optical measuring technique serving for the investigation of temperature influence on the shift of investigated objects natural frequencies. The mentioned method uses a modified high-speed digital image correlation system with original program Modan 3D created in Matlab, by which it is possible to non-contactly determine the natural frequencies using complex mode indicator function (CMIF) or normal mode indicator function (NMIF), the mode shapes as well as the damping ratio. Influence of the temperature on the shift of natural frequencies was analyzed at the planar steel specimen of circular shape with three holes. To the excitation a modal hammer was used. The specimen heating was realized by a hot-air gun, whereby the influence of the elevated temperature on the shift of natural frequencies was investigated by three temperatures distinguishing the room temperature 50° C, 75° C and 100° C.
Control of a Robotic Arm on the Principle of Separate Decision of an Inertial Navigation System
Authors: Božek Pavol
Published: August 2014

This paper describes the system activity and the importance of autonomous inertial navigation system /INS/ and its implementation to control the robotic arm. The article further introduces the execution of DC motor regulation utilized for the positioning of a rotary positioned arm. The motor control comprises the current regulation, angular velocity and the rotation of the motor shaft fixed to the arm regarding the required angular change course of the arm rotation. The regulation structure of the DC motor is carried out in MATLAB/Simulink programme. The arm movement is investigated via mathematical model and virtual dynamic model formed in MSC ADAMS programme.
Performance Evaluation of an Engine Assembly Line through Simulation
Authors: Hole Vi Jay , Rajhansa N.R.
Published: August 2014

Simulation can be used in industrial field allowing the systems behavior to be learnt and tested. This work involves simulation and analysis of the engine assembly line. An engine assembly line contains three subsystems namely engine assembly, hot test line and paint shop. A simulation model built up in modeling software-WITNESS by considered entire set of data. The model validated and several what-if scenarios generated. The different scenario has been analyzed. Finally the throughput, optimum number of pallet and bottleneck identified. This paper discusses the need and uses of discrete event simulation in the design for final engine assemblies.
Selection of Material for Wind Turbine Blade by Analytic Hierarchy Process (AHP) Method
Authors: Maskepatil Lahu P. , Gandigude Ashish U. , Kale Sandip A.
Published: August 2014

Wind energy and solar energy are prominent renewable energy options in the view of growing energy demand. Reliable small wind power produced at compatible price is the need of hour. Cost of the energy generation depends on the cost of the materials used, operating and maintenance cost, cost of the fuel. The material cost directly relates to the cost of the energy. Blade design plays significant role in any wind turbine design. In order to have long expected life of blade material selection is a crucial stage in blade design. Wood, Glass fiber, carbon fiber, natural fiber, sandwich composite materials are different material available for small wind turbine blades. Strength, durability, density, cost, and availability are the important properties to be considered during material selection of blade. The selection of material for wind turbine blade is an important stage in blade design. This paper presents a simple Analytic Hierarchy Process for material selection for the small wind turbine blade. AHP is one of the simplest and cost effective decision making method. In this work AHP is successfully applied for material selection for small wind turbine blade.
Fabrication and Sliding Wear Behaviour of Metal Matrix Composites
Authors: J Udaya Prakash , Moorthy T.V. , Ananth S.
Published: August 2014

Wear behaviour of aluminium matrix composites are characterized by pin on disc wear test using various parameters such as sliding distance, sliding speed and load. MMC consists of aluminium alloy (A356) as the matrix material and particulate alumina of 5% and 10% by weight as the reinforcement was fabricated using stir casting. Wear resistance of composites are improved by the presence of reinforcements. Experiments were conducted based on the plan of experiments generated through Taguchi Technique. L9 orthogonal array was selected for analysis of data. The objective of this investigation is to study the influence of sliding speed, sliding distance, load and weight percentage reinforcement on wear rate of fabricated metal matrix composites.
Analysis and Optimization of Process Parameters of Abrasive Flow Machining Process for Super Finishing of Non-Ferrous Material Nozzle
Authors: Patil Vijay B. , Bhanage Amol S. , Patil Rajat S.
Published: August 2014

This paper deals with the improving lay of finish and the superfinishing of the nozzles which is used in plasma cutting operation. This is basically alternative solution to present finish obtained by turning, drilling and reaming of the profiled bores and orifices. The advance micromachining process were developed, known as Abrasive Flow Machining (AFM) which is capable to altering the orifice (nozzle of plasma cutting machines) so that present process is to be improved without altering the geometry of the component. The effects of different process parameters such as number of cycles, concentration of abrasive, abrasive mesh size and media flow speed, surface finish are studied here. The design of the experiments 16(24) provides two levels for each variable. These levels are taken into consideration for finding out the effect of variation of parameters on the surface roughness of the copper orifice. The objective of paper is to learn how each parameter is considered for Abrasive Flow Machining such as: abrasive concentration in media, number of cycles, abrasive mesh size and media flow speed affects the surface roughness of copper orifice also to find out the mathematical relationship between surface roughness value and process parameters. Analysis of Variance (ANOVA) for the experimental data has been carried out and optimizations of abrasive flow machining process parameters were done. Also Analytic Hierarchy Process (AHP) done here for selecting hierarchy process parameter .Capabilities of the machine ultimately improved with the new technology developed.
Support of the Implementation of Modern Automation and Robotics Solutions through the Application of Innovative Training Methods and Techniques
Authors: Smater Michał , Zieliński Jacek
Published: August 2014

Technological progress and specific of the modern consumer market forces the use of more and more advanced solutions in the field of automation and robotics. Companies offering such solutions must also provide future users with the knowledge necessary to operate the equipment. In many cases, traditional methods of knowledge transfer are not effective due to the nature of the applications offered and the specifics of work in the production area. The article presents solutions for the transfer of knowledge related to the operation of automation equipment and robotics, and information technology solutions to support this process. Mentioned in the article methods allow the effective dissemination of solutions in these areas.
Prototype Model of Walking Robot
Authors: Mikolajczyk Tadeusz , Fas Tomasz , Malinowski Tomasz , Romanowski Łukasz
Published: August 2014

The purpose of this paper is to elaborate not on the bionic pattern of walking robot. Our own simple idea of 4 degree of freedom (DOF) walking robot with the ability to walk on flat surfaces, rotate and climbing upstairs was made using vertical moved legs with rotary foot and additional controlled mass. In this paper, based on former idea, prototype model for only flat surface walking task 3 DOF were presented. Parts of the robot are moving thanks to servo motors. The paper contains kinematics and centre of gravity analysis, presentation of robot and its control system made using Pololu controller. Conducted experiments confirmed presented idea.
Solution Collision Relations in Multirobotic Systems
Authors: Semjon Ján
Published: August 2014

This article describes how to troubleshoot the collision relations multirobotic systems. Use of off-line simulation environment to solve the collision can be avoided relationships of mutual conflicts of the individual parts of workplace. In the article there is an example solutions multirobotic system for spot welding from the use of three industrial robots. The role of the workplace is to create 39 welds on five-parts in compliance with the tact lines 104 seconds. Welded part is the inside back fender car designed for driving in light terrain.
Optimization Trajectory in Handling with the Same Object
Authors: Vagaš Marek
Published: August 2014

In this paper, there is presented an industrial robot trajectory optimization method for series of point-to-point type movements. Also contain an optimization strategy that has been built using through proposed automated optimizing system for handling. The optimized trajectories must lead to avoid exciting mechanical resonance modes of the industrial robot structure. This can be achieved by applying of robot interpolation. The testing results show that the trajectory optimization through this method is feasible for industrial robots.
Proposal of Multirobotic System with Two Robots
Authors: Baláž Vladimír , Vagaš Marek , Semjon Ján , Zubrzycki Jarosław
Published: August 2014

The article describes a design of automated robotized system with robot OTC Daihen AX-V6 suited for manipulation and robot Motoman SDA 10F that provides assembling of chosen parts. The transport of every part is realized from / to stock through conveyor belt Bosch. Superior control system is equipped by computer with visualization program of whole workplace.
Measurement of Transmission Nonlinearities in Servodrives
Authors: Pajkoš Michal , Šlapák Viktor , Sivý Radovan , Ďurovský František
Published: August 2014

Paper presents transmission nonlinearities of servodrives. These nonlinearities directly affect the performance and precision of industrial machines such as robots, manipulators, NC machine tools etc. For measuring purpose of these nonlinearities a measurement test bench was created. Presented measuring test bench is used for static and dynamic measurements of servodrives as well as for precision and gear error evaluation. Paper focuses on properties, analysis and experimental measurements of angular transmission error, torsional elasticity and repeated position accuracy.
Design of Pneumatical Rubik’s Cube Solver
Authors: Varga Jozef , Ďurovský František , Kováč Juraj
Published: August 2014

Rubik’s solver is prime example of science popularizing mechatronic device, combining computer vision techniques, advanced Rubik’s cube solving algorithm and control of industrial pneumatic components. First version of solver constructed by our department was equipped only by 2 lower grippers, resulting in approximately four minutes for single cube solution. Proposed paper describes not only experience gained by development of upgraded 4 gripper version but includes statistical analysis of Thistlethwait’s 45 algorithm required for solving process optimization. Mechanical design, electronics, system overview, performance and limitations of upgraded 4 gripper version are explained in detail as well. Development of vision algorithm for robust cube detection is described in conjoint paper “Robust detection of Rubik’s cube state using Hough transform and advanced clustering functions.”
Utilization of Virtual Reality Connected with Robotized System
Authors: Kováč Juraj , Ďurovský František , Hajduk Mikuláš
Published: August 2014

Article deals with the interconnection of virtual reality and robotic systems. It describes the software and hardware resources that are used in virtual reality and their subsequent application and utilization with robotic systems. It also gives an example of such a interconnection using multimodular system that was developed in Japan by NTT company and own developed system which is under implementation.
Variability of Workplace Structures with SCARA Robot for Palletizing and Sorting Objects
Authors: Koukolová Lucia
Published: August 2014

This paper describes the design of palletizing workplace on a modular basis which can be reconfigured. First part of the paper is devoted to the definition of reconfigurable manufacturing systems and its core characteristics. Second part of the paper describes the workplace for palletization on a modular basis, its parts and possibilities of reconfiguration.
The Solar Tracker – A Control System and a Frame Construction
Authors: Piotrowski Andrzej , Nieszporek Tadeusz
Published: August 2014

Ecology is among the most important challenges facing humankind in the 21st century. The depletion of energy sources compels us to search for alternative methods of electricity generation. One of the most common methods is to use photovoltaic panels that utilize solar energy for generating electric current. Photovoltaic panels should be positioned perpendicularly to the solar radiation incidence direction. Their efficiency is then the highest. Special frames are constructed to support the photovoltaic panel and allow it to rotate. A frame structure developed at the Institute of Machines Technology of the Czestochowa University of Technology is equipped with an advanced system that tracks the apparent motion of the sun. For its construction, steel sections and a micro-processor control system were used. The control program uses a hybrid algorithm that counts the sun position according to the date and time and reads out the indications of a differential sensor built from photoresistors. The position of the photovoltaic panel relative to the sun is corrected with stepper motors with N-encoders allowing rotation in the perpendicular axis parallel to do the earth surface. The developed frame structure and the control system are versatile and enable commercial photovoltaic panels to be mounted. They provide an alternative to expensive solutions offered by installing companies and are possible to be used in the conditions of a typical household.
Accuracy Control in the Machining of Low Rigidity Shafts
Authors: Świć Antoni , Wołos Dariusz , Zubrzycki Jarosław , Opielak Marek , Gola Arkadiusz , Taranenko Victor
Published: August 2014

The study determines the most suitable pattern of alignment and fixing of low-rigidity shafts; it also presents factors that determine such choice. The part is fixed both by force closing and kinematic closing. A new method for machining low rigidity shafts is developed to control the elastic-deformable state of these shafts in a technological system and to produce parts with the required accuracy during turning. To implement this new developed method for low rigidity shafts, an apparatus is designed. The apparatus allows to increase the rigidity of shafts during machining by the application of axial tensile force to the workpiece. Rational prime costs of preparing technological alignment centers at the stage of production preparation are determined; knowing these costs, it is possible to select a suitable machining technology for low rigidity shafts, to produce a technology-oriented design, and to reduce the costs of machining these shafts.
Concept of the Model Robotized Cell for Plasma-GMAW Hybrid Welding
Authors: Pilat Zbigniew , Szulc Jacek
Published: August 2014

Activities in the field of increasing the productivity of the production lines for welding thick metal sheets are focused in two directions. On the one hand, new technologies are being developed for welding, deeper weld penetration and faster welding process. On the other hand are focused on automation of these operations, which have the effect of reducing cost and increasing efficiency. Improved are also the working conditions of people employed in the welding processes. In both these directions the hybrid welding Plasma-GMAW could fulfill all requirements as a new technology. The article gives the concept model of the complete robotized welding cell, in which this method will be implemented and tested.
2D-Shape Analysis Using Shape Invariants
Authors: Stejskal Tomáš
Published: August 2014

High efficiency detection of two-dimensional objects is achieved by an appropriate choice of object invariants. The aim is to show an example of the construction of an algorithm for rapid identification also for highly complex objects. The program structure works in a similar way as animal systems in nature. Differentiating runs from whole to details. They are used to shape invariants. The program algorithm is specifically used a surfaces invariant, which represents a whole. Then was used a boundary length invariant around the object. Finally, the chord distribution code was used, which represent a detail of object recognition. The actual computational algorithms are not software-intensive and easy to debug. System uses the redundancy of uncertain information about the shape. In principle, chosen a certain balance between the confidence level of recognition and repetition of shape recognition by various methods.
OpenCV-Based Automatic Detection System for Automobile Meter
Authors: Hao Ze Long , Chen Xu Hui , Hu Jian Qiang , Wen Xuan , Wang Xiao Dong
Published: August 2014

For the universality of computer vision in the automatic detection of pointer instrument, an OpenCV-based automatic detection system for automobile meter was proposed and realized. The original video image was pre-processed through the filtering and SURF algorithm was used for the registration of template and test instruments to obtain the transformation parameters. Pointer and dial were treated respectively. Through the gray-scale images subtraction, Canny edge extraction and Hough line detection, the straight line where the pointer was obtained rapidly. Then the pointer readings were obtained through functional relation between the point angle and actual value. Experimental results show that this system can be used to conduct the real-time and automatic detection of different types of meters.
Application of Support Vector Machine in Identifying inside Moldy Chestnut Using Near Infrared Spectroscopy
Authors: Liu Jie , Li Xiao Yu , Wang Wei , Zhang Jun
Published: August 2014

NIR spectroscopy has been applied in detecting inside quality of chestnut successfully. In this work, Support Vector Machine Discriminant Analysis was utilized to identify the qualified chestnuts, the serious moldy chestnuts and the slight moldy chestnuts using their Near infrared spectra region from 833 nm to 2500 nm. 109 chestnut samples were involved and four different preprocessing methods were compared. The results showed that for all the models, the average correct rates of training set and validation set were higher than 90%. The performance of model based on raw spectra was not as good as other models, which indicated the necessity of preprocessing. The models based on the spectra preprocessed by first derivative and multiplicative scatter correction had the same performances, with 97% and 85% as the correct rate of training set and validation set. The models based on the spectra preprocessed by Standard normal transformation has 100% correct rate of training set while 88% of validation set. The second derivative model had the best result with 100% and 90% as the correct rate of training set and validation set. These results demonstrated that the NIR spectroscopy had capability to detect interior mildew of intact chestnut nondestructively.
A Method for Measurement Traceability of Calibrator for Electronic Instrument Transformer Tester
Authors: Lei Ming , Guo Yue , Zheng Xin
Published: August 2014

The bottleneck of the measurement traceability system of electronic instrument transformer is the calibrator, which is based on the digital micro-differential source principle and plays the role as intermediate between digital values in data frames and the analog output of the existing standard current transformer (CT) or voltage transformer (VT). A kind of working mechanism of the calibrator for electronic instrument transformer tester and related calibration method are proposed in this paper. The ratio accuracy can be calibrated by the high-precision multimeter and the phase accuracy can be calibrated by the high-speed oscilloscope, which records the waveforms of analog output and the synchronization signal, and the time offset between them can be traced to the time standard. A calibrator is designed and manufactured according to the mechanism and related experiments are conducted to verify the feasibility of the calibration method.
Application of Rotation Vector in SINS Algorithms
Authors: Wan Liang Jin , Dong Chun
Published: August 2014

Updating attitude precisely in time is the primary task of strapdown inertial navigation system(SINS) algorithms. This paper mainly studied the application of rotation vector in three different methods of data fusion respectively named linear interpolation, gradient descent and complementary filter for attitude-updating, using low-cost MEMS inertial sensors in SINS. Meanwhile, an idea that the quaternion attitude could be updated by constructing micro-rotation quaternion from rotation vector in the sampling interval is proposed. The idea is based on geometric interpretation of space rotation transformation, while the general method is the differential equations of quaternion about rotation vector. Therefore the new method is an approximation method within enough short update interval, but its best superiority is the higher speed of attitude-updating than general method with little loss of accuracy because of no necessary to solve differential equations. The experimental results also show the effectiveness and accuracy of three improved algorithms with the new idea.
Parallel Programming and Optimization Based on TMS320C6678
Authors: Mou Xin Gang , Wei Guo Hua , Zhou Xiao
Published: August 2014

The development of multi-core processors has provided a good solution to applications that require real-time processing and a large number of calculations. However, simply exploiting parallelism in software is hard to make full use of the hardware performance. This paper studies the parallel programming and optimization techniques on TMS320C6678 multicore digital signal processors. We firstly illustrate an implementation of a selected parallel image convolution algorithm by OpenMP. Then several optimization techniques such as compiler intrinsics, cache, DMA are used to further enhance the application performance and achieve a good execution time according to the test results.
Equivalent Modeling and Simulation of Large Photovoltaic Station
Authors: Li Hao , Pang Song Ling , Huang Jia Dong
Published: August 2014

In power system analysis, the large PV station cannot be simply considered as the load, while the dynamic behavior of power electronic circuit must be considered. In response to this question, the dynamic model of PV generation unit and the dynamic equivalent strategy of large PV station are described. The dynamic model of a real large PV system and associated simulation results based on the real-time digital simulator (RTDS) are also given. The work of this paper is valued to closed loop testing of new protection and controller adapted to power system with high renewable energy penetration.
Gliding Trajectory Optimization Method Based on Particle Swarm Optimization and Direct Shooting Method
Authors: Zhang Wen Jing , Xiong Fen Fen
Published: August 2014

Glide trajectory optimization of vehicle can greatly improve the performance of missile. As is well-known, methods of trajectory optimization can be divided into direct and indirect methods. Generally, the direct method is convenient and can obtain the optimal solution with higher probability. Based on the direct method, a missile trajectory is optimized by discretizing the control quantity (angle of attack) and transforming the original optimal control problem to a nonlinear programing problem (NLP) in the present paper. The particle swarm optimization algorithm that is easy to implement and has higher convergence rate is utilized to solve the transformed NLP to generate the optimal angle of attack rule. Simulation results show that with the optimal rule, gliding distance of missile is clearly improved compared to the initial one.
The Effects of Noises in the Marr-Pirt Model
Authors: Dong Huan Huan , He Li , Lu Hong Wei
Published: August 2014

This study aims to analyze the effect of Marr-Pirt model driven by white and integrated noises. The Gaussian white noise and integrated noises are generated using the Box-Muller algorithm. It is observed that noises could change the peak value and time of the model. In addition, integrated noises have more significant impact on the model than white noise when they are under the same intensity. This reveals integrated noises can better approximate to a practical stochastic process, and deserve substantial attention.