bluuebunny/crossref_metadata_2025 huggingface dataset:
Task Scheduling of Cloud Computing in Weapon Network System
Authors: Tao Qian , Pan Bo , Cui Wen Quan
Published: August 2014

In recent years, the rapid development of cloud computing brings significant innovation in the whole IT industry. For the local tasks scheduling on each computational node of the top model of weapon network, an open task scheduling framework was introduced a task accept control scheme based on the tasks based on load balancing, quality of service (QoS) and an improved constant bandwidth server algorithm was presented. The result of simulation shows that the scheduling policies can improve the schedule speed when the number of tasks increases and can meet the demand better for the real time requirementsof the tactical training evaluation system for complexity and Large-scale.
Optimization Design and Performance of Vibration Suppression for Delayed Dynamical Vibration Absorber with Broadband
Authors: Zhao Yan Ying , Li Chan Gai
Published: August 2014

The delayed dynamical vibration absorber is applied to suppress the vibration of the torsional vibration system. The governing equations of the two degree of freedom vibrating system consisting of crankshaft and delayed dynamical vibration absorber are obtained. The physical parameters of the dynamical vibration absorber for the passive control system are optimum designed. The frequency of anti-resonant point is located at the midpoint between two resonant points, and the optimized amplitude frequency response curve is relatively flat near the anti-resonant point. The control parameters of gain and time delay are optimum designed in the active control system. The minimum amplitude of crankshaft is selected as the optimization objective. The genetic algorithm is used to optimize these control parameters. The optimized delayed dynamical vibration absorber has achieved good performance of vibration suppression within a wide frequency band of external excitation.
The Development of Sokoban Game Based on Android System
Authors: Shi Yi Ping
Published: August 2014

Along with the popularity of Google Android operating system, the Android game designed for recreation, exercise thinking will become mainstream. This paper mainly introduces the development process of a 3D Sokoban game based on Android system.
Robust Analysis on a Privacy Preserving Recommendation Algorithm under the KNN Attack
Authors: Gao Yan , Xia Jing Bo , Ji Jing Jing , Ma Ling
Published: August 2014

— Among algorithms in recommendation system, Collaborative Filtering (CF) is a popular one. However, the CF methods can’t guarantee the safety of the user rating data which cause private preserving issue. In general, there are four kinds of methods to solve private preserving: Perturbation, randomization, swapping and encryption. In this paper, we mimic algorithms which attack the privacy-preserving methods with randomized perturbation techniques. After leaking part of rating history of a customer, we can infer this customer’s other rating history. At the end, we propose an algorithm to enhance the system so as to avoid being attacked.
A 5.8 GHz Band Smart Antenna Using 4x4 Butler Matrix
Authors: Soualmi Nouamane , Rouaba Ahmed , Li Hou Min
Published: August 2014

A smart antenna using 4x4 Butler matrix for 5.8 GHz band is designed. The antenna array has four inputs and is excited by the Butler matrix feeding network to electronically steer the beams in desired directions. The architecture of the Butler matrix beamforming network is designed without using cross couplers, in fact the array antenna will be surrounded by the hybrid couplers, and it leads to decrease losses due to the crossing lines. The designed prototype is simulated on Rogers RT /duroid 5880 substrate with a relative permittivity of 2.2 using ADS momentum software.
Downsampling Direct Sequence Spread Spectrum Signal Using Orthogonal Pretreatment
Authors: Zhang Jin Bo , Cheng Jian , Yang Lei
Published: August 2014

The Direct Sequence Spread Spectrum (DSSS) signal is widely used because of its good concealment and anti-jamming performance. The Compressive Sensing (CS) theory reduced the sampling rate of the DSSS signal effectively compared with the traditional Nyquist-rate sampling theory. While in the process of CS sampling the sensing matrix and the sparse basis generally have a strong correlation when the DSSS signal is decomposed with a complete dictionary. This paper presents a novel orthogonal pretreatment method with which the incoherence between sensing matrix and sparse basis can be improved. As a result, the reconstructed signal is more accurate. Simulation results demonstrate that this method is effective and efficient.
A Novel Fabrication Technology of Hot Stamping Film
Authors: Chen Qing Hua , Su Miao Gang , He Yi Bin , Chen Ying Jun , Wu Wen Gang
Published: August 2014

This paper proposes an environmentally friendly energy-saving high-quality laser stamping foil film with particular seam-free feature. The whole idea is to meet the country's high-end anti-counterfeiting technology, consumer products packaging appearance, high-end gifts demand for the target material. The State Quality Supervision and Testing Center (Guangzhou) detection results shows that it includes many merits such as functionality, security, reliability, ease of use, flexibility, stability and other indicators, the performance meets or exceeds the requirements of enterprise technical conditions.
Simulation Model of Manipulator for Model Based Design
Authors: Miková Ľubica , Kelemen Michal , Virgala Ivan , Michna Maroš
Published: August 2014

The subject of creation of simulation and mathematical models is nowadays more and more current and its application is in almost every aspect of life. The article deals with compiling a mathematical model of a pivoting arm using Lagrange equations of the second kind. Subsequently, the model will be created in the simulation program Matlab/Simulink. The simulation model will as well be assembled in the program Adams. The results of these simulations will be compared in the conclusion. This article presents a procedure for resolving a mechanical system from the beginning, from creation of a mathematical model through creation of a simulation model up to evaluation of the simulation results. This paper presents a procedure for resolving mechanical system from the beginning. Thus, it is done by creating a mathematical model through the creation of a simulation model to evaluate the results of the simulation. According to these simulations will produce a working model of the manipulator, which could be used for teaching purposes.
Numerical Analysis of the Influence of Material Model on Response of Compressed Imperfect Thin-Walled Channel
Authors: Ivančo Vladimír , Fedorko Gabriel , Novotný Ladislav
Published: August 2014

In the paper, the influence of material model selection on the behaviour of Finite Element model of a compressed thin-walled channel is studied. Results of three material models of channels of two different lengths and two types of geometric imperfections are compared and discussed.
Trajectories of Projectiles Launched at Different Elevation Angles and Modify Design Variable in MSC Adams/View
Authors: Hroncová Darina , Grieš Maroš
Published: August 2014

The aim of the paper is the application of MSC Adams/View for kinematic analysis of motion of a mass point in a curve with consideration and without consideration of resistive forces. The first section describes the program Adams and its modules Adams/View, work with this module and its basic operation. In the following section there is solved an inclined throw of a mass point with and without resistance using numerical methods. Subsequently, this work deals with assembling of the models in Adams/View, running the simulations, plotting the trajectory, which shows the distance travelled and with creation of a table of parameters for easier and especially quicker change of model properties. Finally, the work presents the results with graphic display of parameters such as speed, distance and acceleration.
Analytical and Numerical Proposal for Designing Plastic Vessels
Authors: Jasminská Natália , Brestovič Tomáš , Puškár Michal
Published: August 2014

The article in question concerns the proposal of a pressure vessel for a water heater made of plastic materials. At present, new materials and technologies are coming to the fore where the product price, above all, plays an important role, taking into account the relevant physical and strength properties. The pressure vessels of larger volume (more than 10 litres) water heaters are only manufactured using steel materials under European Union conditions. The proposal considers the use of an alternative material, namely plastic. By optimising the proposal – by the use of plastic materials – it would be possible to achieve a financial economy, since plastic is a good thermal insulating material and does not require enamelling or the use of a cathode protection. There are plastics available on the market which meet the requirements of heat resistance and have a relatively high tensile strength. One of these proposed materials is Noryl GFN1630V which contains 30 % of glass fibre and was chosen as the optimal material. By making strength calculations in the ANSYS programme, water heater pressure vessels were proposed.
Early-Stage Design of Robotic Manipulator Using Dual Visual Perception
Authors: Šarloši Juraj , Surovec Róbert , Šimko Ondrej , Jezný Jaromír , Vargovčík Ladislav , Varga Martin
Published: August 2014

Many service mobile robots have an articulated robotic manipulator mounted on their platform. The mobile platform extends the workspace of the arm, whereas the arm offers several operational functionalities. The basic idea is to mount two cameras to the robotic arm. One camera provides the perception of the surrounding environment and navigation of the robot, the second one located on the robot arm provides for the perception of the object of cooperation. This paper deals with an early-stage design process of the mentioned robotic manipulator using dual visual perception. It includes kinematic, dynamic and stress-strength analysis. For the kinematic analysis the homogeneous matrix method and for dynamic analysis the Newton-Euler method has been used. These analyses are required for control solution.
Operational Safety of Compressor Station Pipeline
Authors: Sivák Peter , Delyová Ingrid , Trebuňa František
Published: August 2014

Failure of pipeline system can endanger human lives and cause serious damage; therefore it is necessary to check it in terms of strength and life reliability. Inspection was performed on compressor station pipeline, where in terms of resistance to brittle failure it was discovered, that the weakest point of the pipeline is the weld. At lower temperatures danger of brittle failure of weld joint can arise. To assess the strength of the pipeline in investigated cross-section, with respect to state of plane stress, strength theories were applied. Values of reduced stresses were assigned based on main normal stresses resulting from experimentally set components of state of plane stress. Fatigue assessment was done, based on currently valid standards.
Influence of Material Structure and its Properties on Predicting Life of Pressure Pipelines
Authors: Delyová Ingrid , Sivák Peter , Trebuňa František , Hricová Beata
Published: August 2014

Pressure pipelines belong to the group of technological carrying structures that are designed in accordance with Standard Eurocode 3: STN EN 1993: Design of steel structures. These standards are used also later in the stage for assessment of failure states and fatigue life. Standard Eurocode 3: STN EN 1993-4-3 establishes the requirements for material properties of pipes and welds, associated with mechanical properties. A serious problem in estimating fatigue life of structure is the consideration of gradual degradation. The article also discusses the analysis of fatigue failure of the pressure pipeline, where it was found that the initiation of fatigue failure occurred in the area of poor weld. The further spread of the crack then occurred in the base material of the pipeline.
Application of Transmission Photoelasticimetry for Stress Concentration Analyses in Construction Supporting Parts
Authors: Pástor Miroslav , Trebuňa František
Published: August 2014

A necessary procedure for the evaluation of reliability and durability of supporting steel structures is an identification of critical points with the stress contractors because the critical areas are decisive with regard to location of supporting structure damage or loss of functionality. The identification of critical points can be performed by means of various methods. The full-field optical method can be found among the most often used ones. In this article there is presented an application of the transmission photoelasticimetry at the full-field stress analysis of the selected construction elements.
Improved GNSS Localization with the Use of DOP Parameter
Authors: Duchoň František , Hanzel Jaroslav , Babinec Andrej , Rodina Jozef , Paszto Peter , Gajdosik Daniel
Published: August 2014

This paper presents the approach to improve localization based on GNSS. The principles of the GPS localization and impact of the DOP parameter on localization error are mathematically analyzed. The algorithm based on the use of DOP parameter and Kalman filter for the improvement of the localization accuracy suitable for small scale outdoor mobile robots and other outdoor applications is proposed. The applicability of the proposed methodology was verified by performed experiments with two common cheap miniature GPS modules and accurate high-end GNSS receiver used as a reference frame for the measurements. The obtained results affirmed the improvement of the localization accuracy.
Calculations of Phase Transformations in Welding Simulations
Authors: Novotný Ladislav , Ivančo Vladimír
Published: August 2014

In the paper the principle of welding simulation is presented and the methods of solution of phase transformation are described. The first part characterizes elementary equations of heat transient solution, boundary conditions during welding simulation (prescribing moving heat flux, convection, radiation). The methods of phase transformations’ solution are described for diffusion processes as well as diffusionless processes.
Design of Active Feedback for Rehabilitation Robot
Authors: More Marcel , Liska Ondrej
Published: August 2014

Sensor systems are an essential part of automated equipment. They are even more important in machines that come in contact with people, because they have a significant impact on safety. This paper describes the design of active feedback for rehabilitation device driven by pneumatic artificial muscles. Here are presented three methods for measuring the load of the robot. The first is a system composed of Force Sensitive Resistors (FSR) placed in the handle of the device. Two other methods are intended to measure the load of the actuator composed of artificial muscles. The principle of one method is to measure the difference in filling pressures of the muscles, second is based on strain measurement in the drive cables. The paper describes advantages and disadvantages of using each of these methods in a rehabilitation device.
Innovation of Scavenging System to Increase Volumetric Efficiency of Internal Combustion Engines
Authors: Sabadka Dušan , Trebuňa Peter
Published: August 2014

This contribution is focused on the analyze the possibilities of increasing the power of two-stroke internal combustion engine and their consequential execution in the practice. Currently dealing with these issues major manufacturers of motorcycle international brands, but also service technicians of professional riders, as well as regular users of motorcycles. The basic objective of this paper is the issue of increasing power output for single-trace motor vehicles, and objective of the experiment was to increase performance through volumetric efficiency, i.e. increase indicated mean effective pressure. The results of the experiment were tested on the specific equipments and in practice. In conclusion paper presents the benefits and results of the experiment. By means of measurements on the performance brake, in the final stage of paper is tested by how much increased power output of the engine after modification, compared to the production engine.
Kinematic Analysis of Mechanisms Using MSC Adams
Authors: Hroncová Darina , Delyová Ingrid , Frankovský Peter
Published: August 2014

This paper deals with kinematic analysis of a six-member mechanism. The analytical solution is based on the fundamental kinematic relations derived for this mechanism. The program MSC ADAMS was selected for the simulation modeling of mechanism. That program allows comprehensive analysis of this system using a simple modeling.
Analysis of Failure in Adhesively Bonded Joints Using Traction Separation Theory
Authors: Ranjan Gautam , Pandey R K , Barman Asim Gopal
Published: August 2014

In recent years, there has been a tremendous increase in the use of adhesively bonded joints for the structural components as they offer various advantages such as low structural weight, low fabrication cost, and improved damage tolerance. One of the major concerns in their use is the crack produced at the interface of adhesive and adherend surface causing the failure of the joint. A study on the determination of crack growth can contribute momentously to avoid the joint failure. In this study the crack growth caused in adhesive due to displacement controlled loading has been analyzed by ABAQUS/Explicit software. Crack growth was modeled in the double cantilever beam (DCB) using traction separation law by element-based cohesive behavior. The analysis showed that: (1) The adhesive joint behaves linearly before the first cohesive element failure and after that the failure continues to increase even on decreasing the load untill it fails completely, (2) The noise during the failure of adhesive is caused due to the stress wave which is produced as a result of sudden loss in traction between the adhesive and the adherend.
Investigation of the Machinability Characteristics of GFRP / Epoxy Composites Using Taguchi Methodology
Authors: Vasudevan Hari , Deshpande Naresh C. , Rajguru Ramesh
Published: August 2014

Many glass fiber reinforced plastic (GFRP) composite components made from primary melt processes require additional machining to meet the requirements of assembly and accurate dimensional tolerances. Importance of woven fabric based glass fibre reinforced composites is widely known in many industrial applications. However, very little is known about machinability of these composites. Cutting force is treated as one of the primary measures for determining the machinability of any material.This paper presents an investigation into the longitudinal turning of woven fabric and epoxy based GFRP composites, using polycrystalline diamond tool, so as to analyze the effect of cutting parameters and insert radius on the cutting force. The force was measured through longitudinal turning, according to the experimental plan, as developed on the basis of Taguchi methodology. The signal to noise ratio and analysis of variance were applied to the experimental data, in order to determine the effect of the process variables on tangential cutting force. Statistical results indicated that the cutting force is significantly influenced (at a 95% confidence level) by feed rate, followed by depth of cut, whereas, cutting speed and insert radius have a smaller influence. The cutting force also increases with the increase in feed rate and depth of cut.
Imperata cylindrica / Sacred Grass Long Fibre Reinforced Polyester Composites – An Experimental Determination of Properties
Authors: Srinivasababu Nadendla , Kumar J. Suresh , Reddy K. Vijaya Kumar
Published: August 2014

In the present work a new natural fibre i.e. sacred grass botanically called Imperata Cylindrica is introduced and it belongs to vedic grass family. The fibre is extracted by splitting method and is reinforced into the polyester matrix by hand lay-up technique for the fabrication of tensile, flexural, impact, dielectric test specimens as per ASTM procedures. Highest values of tensile strength (50.96 MPa), modulus (990.86 MPa) are observed for sacred grass fibre reinforced polyester composites at maximum volume fraction of chemically treated fibre. At 14.75 %, 35.89 % sacred grass fibre volume fraction the composites exhibited flexural strength, modulus of 43.19 MPa, 4.81 GPa respectively. Impact strength of 92.53 kJ/m2 is obtained for the composites reinforced with 34.73 % volume fraction of sacred grass fibres. The dielectric strength of the composites varies from 10 to 6.66 kV/mm for composites reinforced with fibres from minimum (6.26 %) to maximum (32.25 %) fibre content.
Experimental Optimization of Thickness of Protective Padding for Two-Wheeler Rider’s Helmet
Authors: Joshi Atul , Gore Rahul G. , Sundaram Kalyan
Published: August 2014

Helmet protection to vulnerable two wheeler riders presents many challenges including those of weight, ergonomics appearance and convenience. Safety provided to a two wheeler riders head is mainly dependent on the level of shock getting propagated to the brain during the accident situations and therefore the design of the layer of shock absorbing padding assumes great importance. This padding, generally made of expanded polystyrene (EPS) or of state of art materials needs to be optimized. Helmets prototypes using an external hard shell made of Fiber Reinforced Plastic (FRP) were built to the different thicknesses and impact absorption tests on different types of test rigs were conducted
Effect of Graphite Addition on the Mechanical Properties of Stir Cast Particulate Aluminum Metal Matrix Composite Reinforced with Alumina and Silicon Carbide
Authors: Kulkarni Swanand R. , Sonawane P.M. , Karnik M.G.
Published: August 2014

Fabrication of PAMC by stir casting, at semisolid stage of the matrix results in homogeneous distribution of the reinforcements in the matrix, which leads to better mechanical and tribological property of the composite. In present study aluminum alloy Al6082 was reinforced with 1% Al2O3 and 3% SiC and 0 to 6% graphite particles by weight. We have varied temperature, speed of agitation and kept all other parameters constant. With present stir casting process, we have successfully processed the total reinforcement up to15% by weight. PAMC has shown 23% increase in hardness, 110% increase in tensile strength and 54% increase in the stiffness. With increase in the graphite reinforcement, coefficient of friction and wear rate of PAMC decreases. Coefficient of friction stabilizes between 0.3 to 0.33 and wear rate stabilizes near to 0.00005 mm3/Nm.
Active Control of Thermally Induced Vibrations in Smart Structure Instrumented with Piezoelectric Materials
Authors: Sharma Anshul , Susheel C.K. , Kumar Rajeev , Chauhan V.S.
Published: August 2014

In this paper, a finite element model of piezolaminated composite shell structure is developed using nine-noded degenerated shell element. The stiffness, mass and thermo-electro-mechanical coupling effect is incorporated in finite element modeling using first order shear deformation theory and linear piezoelectric theory. The sensor voltage is calculated using the same formulation and fuzzy logic controller is used to calculate the actuator voltage. The fuzzy logic controller is designed as double input-single output (DISO) system using 49 If-Then rules. The performance of fuzzy logic controller is compared with convention constant-gain negative feedback controller. The simulation results illustrate the superiority of fuzzy logic controller over constant-gain negative feedback controller.
Characterisation of the Key Fuel Properties of Oxygenated Diethyl Ether-Diesel Blends
Authors: Patil K.R. , Thipse S.S.
Published: August 2014

Diethyl Ether (DEE) is a promising oxygenated renewable bio-base resource fuel for CI engines owing to its high ignition quality. DEE has several favourable properties, including exceptional cetane number, very low self-ignition temperature, high oxygen content, broad flammability limits and reasonable energy density for on-board storage. It is a liquid at ambient conditions, which makes it attractive for fuel handling and fuel infrastructure requirements and hence, it is a compatible fuel for use in CI engine. Diethyl ether is the simplest ether expressed by its chemical formula CH3CH2-O-CH2CH3, consisting of two ethyl groups bonded to a central oxygen atom. It can be mixed in any proportion in diesel fuel as it is completely miscible with diesel fuel. It was observed that density, kinematic viscosity and calorific value of the blends decreases while the oxygen content and cetane number of the blends increases with the concentration of DEE addition. The presence of DEE increases the front end volatility of the blends and decreases boiling point in comparison to baseline diesel fuel. No significant difference was observed in the tail-end volatility of the blends. The blended fuel retains the desirable physical properties of diesel fuel but includes the cleaner burning capability of DEE.
Dynamic Stability of a Motorized High Speed Machine Tool Spindle Supported on Bearings
Authors: Shaik Jakeer Hussain , Srinivas J.
Published: August 2014

Dynamic behaviour of spindle system influences chatter stability of machine tool considerably. Self-excited vibrations of the tool results in unstable cutting process which leads to the chatter on the work surface and it reduces the productivity. In this paper, a system of coupled spindle bearing system is employed by considering the angular contact ball bearing forces on stability of machining. Using Timoshenko beam element formulation, the spindle unit is analyzed by including the gyroscopic and centrifugal terms. Frequency response functions at the tool-tip are obtained from the dynamic spindle model. In the second phase, solid model of the system is developed and its dynamic response is obtained from three dimensional finite element analysis. The works on analysis of the stability of milling processes focus on calculating the stability boundary of the machining parameters based on the dynamic models characterizing the milling processes. The stability lobe diagrams are generated from frequency response functions (FRF’s) lead to an stability limit prediction for the system at high speed ranges.
Kinematic Modeling and Hardware Development of 5-DoF Robot Manipulator
Authors: Dharmendra Kumar Patel , Ramachandra K. , Sartaj Singh
Published: August 2014

This paper presents a 5-DoF articulated robot manipulator and proposes a strategy for solving its inverse kinematics. The Denavit – Hartenberg (D-H) parameterization has been used to model the kinematics of the manipulator. As degree of freedom of manipulator increases, the geometrical solution for inverse kinematics becomes difficult; hence an analytical method for the same is presented. Novelty in the method presented is that no approximations of trigonometric functions are used resulting in a theoretical positional accuracy of 10-10mm of the end-effector. The articulated robotic manipulator developed makes use of integrated actuators and rapid prototyping technology enabling easy replication for educational purposes. The robot arm has been used for manipulation tasks in its workspace successfully.
Flow Stress Prediction of Ti-6Al-4V Alloy at Elevated Temperature Using Artificial Neural Network
Authors: Kotkunde Nitin , Balu Aditya , Gupta Amit Kumar , Singh Swadesh Kumar
Published: August 2014

Flow stress during hot deformation depends mainly on the strain, strain rate and temperature, and shows a complex nonlinear relationship with them. In this work, experimental flow stress have been predicted for Ti-6Al-4V alloy using isothermal uniaxial tensile tests ranging from 323K to 673K at an interval of 50K and strain rates 10-5, 10-4, 10-3 and 10-2 s-1. Based on the input variables strain, strain rate and temperature, a back propagation neural network model has been developed to predict the flow stress as output. The whole experimental data is randomly divided in two parts: 90% data as training data and 10% data as testing data. The artificial neural network enhanced with differential evolution algorithm is successfully trained based on the training data and employed to predict the flow stress values for the testing data, which were compared with the experimental values. Correlation coefficient for training and testing data is found to be 0.9997 and 0.9985 respectively. Based on the correlation coefficient, it indicates that predicted flow stress by using artificial neural network is in good agreement with experimental results.
Value Stream Evaluation and Simulation to Improve Material Flow and Productivity
Authors: Ramnath B. Vijaya , Chandrasekhar Vishal , Elanchezhian C. , Vinoth L. Bruce Selva , Venkatraman K.
Published: August 2014

The main objective of this paper is to improve the productivity of a carburetor production processes using lean manufacturing technique. The current system of the carburetor production process has been mapped using electronic Value Stream Mapping (eVSM) tool which is a lean manufacturing tool and the wastages in the current system are identified. Then future state was drawn by using eVSM tool which has an enhanced process ratio by decreasing maximum possible waste in the production process. The current and future state of the carburetor production has been created as model and simulated using Arena software. The simulation shows a significant decrease in Non-Value added time and production lead time, thereby indicating increase in productivity and better work flow in production processes.
Response of Starter Motor of an Engine Subjected to Random Vibrations
Authors: Kendre Rameshwar , Prabhune Satish , Ghorpade Ratnakar
Published: August 2014

The automobile sector requires continuous progress in development of ‘Starter Motor’ by innovative approaches although significant progresses are made in the past. Development of Starter Motor has made it possible to start the engine by electrical means instead of doing it manually. The outstanding features of this motor are they can produce the maximum starting torque to crank the engine. In this case, we use electrical energy and convert it to mechanical energy in order to start the engine in motor vehicles. As the starter motor is mounted near the engine; vibrational disturbances produced due to either uneven road conditions or engine vibrations or both hampering the performance of starter motor which may result in breaking of component of motors. Vehicle will experience vibrations whose values are un-predictable at certain point of time causing random excitation and random vibrations. Aim of paper is to perform analytical formulation for Power Spectral Density function of Starter Motor by treating it as a cantilever beam and to find its response to random vibrations by using Finite Element Analysis (FEA).
Observation as Learning Methods in Simple Visual System of Vehicle Control
Authors: Wójcik Krzysztof
Published: August 2014

The goal of the presented article is a description of an inductive method of knowledge structure creating, which may be applied in a system of an autonomic vehicle control. The paper deals with the relatively simple task of industrial vehicles control, which operate in a specific environment. The information about the environment is achieved from camera mounted on the vehicle. An analysis of the image leads to the construction the knowledge in a form of structure of concepts (i.e. classes) and objects. The proposed approach is illustrated by simple example. The paper describes crucial problems of the proposed knowledge creation, especially concerning initial assumptions about visible phenomena and problems of the knowledge updating (learning). The article attempts to formulate conditions determining a successful usage of the proposed methodology. The main condition is building an efficient methods of searching the proper concept structure.
Insect Pheromone Strategy for the Robots Coordination
Authors: Zelenka Jan , Kasanický Tomas
Published: August 2014

Insect colony inspires scientists for years to create similar behavior in the robotic application. The main goal of our work was to develop simple and powerful algorithm which will accept dynamically changes in the size of a robot swarm due the mission. This algorithm is suitable for situations where unpredictable conditions may lead to robot fault in multi-robotics system and mission completion is endangered. In this article we would like to investigate properties of a simple pheromone based algorithm. The algorithm operates as cellular automata and partially uses an insect pheromone strategy for the robots coordination. Our abstract model is a decentralized adaptive system with a shared memory which represents the environment.
Materials Having a High Degree of Adhesion for Gripping Elements Designing
Authors: Horák Marcel , Novotný František
Published: August 2014

The paper analyses one of possibilities to use new materials based on polyurethane, polypropylene or silicone having highly adhesive contact surfaces for gripping elements designing. In concrete terms, it is a case of an alternative approach to the solution of designing standard multi-elements vacuum gripping heads with an active control system (vacuum level control) controlling gripping forces in processes of automatic handling flat objects of the plate type. The aim of this new design solution is to replace individual gripping elements (suction cups) by elements, the surfaces of which coming to the contact with the object handled are provided with adhesion materials. The system minimizing energy demands stemmed from this solution, namely in the way that it decreases or even eliminates the pressure air consumption when combined vacuum-adhesive or only adhesive gripping elements are used. Moreover, it is possible to use the adhesive gripping principle profitably in technological processes susceptible to the environment contamination with airflow when manufacturing new products with many functional layers. Besides a general analysis of problems, the paper presents outputs of laboratory tests. Also a computer model of the contact respecting rheological behaviour of the adhesive material basic matrix is given.
Palette - Assembly Cell with Robot SCARA
Authors: Baláž Vladimír
Published: August 2014

The article describes a basic structure of handling operations for palletization. Also contains a ways to organize objects on pallets and determination of programmable palletizing points. It explains the principle of modular structures with designed workstation.
On Line Videooptical System for Weld Groove Analysis
Authors: Mikolajczyk Tadeusz , Mikolajczyk Mikolaj , Skibicki Andrzej
Published: August 2014

The article shows the video-optical system for to recognition of location and size of weld groove. Was used special system equipped with two USB cameras (VGA resolution) and red laser laser. First of camera was used to recognition of groove location and second one with laser as mobile scanner was used to size of groove analyse. For proposed conception was prepared in Visual Basic 6.0 special software WELD_REC, which calculate the angle of groove location and the groove parameters: width, depth and angle of opening. Presented system is used for experiments using PC controlled IRb –60 industrial robot. The differences of location of groove: between well-known and video-optical measured have the highest of 3% .
Accuracy of Rapid Prototyped Models with Using of FDM Technology
Authors: Beniak Juraj , Križan Peter , Matúš Miloš
Published: August 2014

Conventional technology are also today the main technology used for production of parts in mechanical engineering industry. In every machine shop we can see turning machines, milling machines, drilling machines and others. These machines are generally controlled by computers. But the modern production lines and production companies use also innovative technology to make production more effective, faster, less expensive. With regards of mentioned factors is possible to use also rapid prototyping technology, which can help in product developing, prototype creating but also in short-run or middle series production. Rapid prototyping technology include different techniques for product creation, using different procedures leading to various outputs. The final product can be made from various materials and parts can be used for several applications.
Integration of Complex Maintenance System in Operation
Authors: Žilinský Adam
Published: August 2014

From the perspective of practice, maintenance is carried out to ensure the desired reliability of production systems so that the total cost of the operation of such systems are the lowest. The article describes the need for integration of complex system maintenance and its benefits. The first section describes the approaches, starting points and methods of integration. Further, the article discusses integration techniques. Finally, there are described the economic aspects and the evaluation of the integrated system maintenance.
Proposal of Multi Robotic Cells for Production Lines
Authors: Hajduk Mikuláš , Baláž Vladimír , Koukolová Lucia , Zubrzycki Jarosław
Published: August 2014

The paper is focused on the determination of the number of robots for multi robotic cells that can be part of the line, respectively as an individual, for example sub-assemblies welding of car bodies. This paper describes general process steps of the methodology of design of multi robotic systems with a more detailed description of the determination of number of robots in the workplace. Some methodological steps are illustrated by specific examples.
Analysis of Mine Hoist System Monitoring and Fault Diagnosis
Authors: Bai Jian Yun , Yan Li Peng
Published: August 2014

This paper is Zhengli Coal JKMD3.5 × 4 (III) E-type floor-type multi-rope friction hoist for the study, in order to enhance the system to improve monitoring and fault diagnosis for the purpose of fuzzy fault tree analysis method as the lift system the method of fault diagnosis on hoist brake system fault tree analysis, the results of the analysis can play a guiding role in the daily repair and maintenance, thereby enhancing the safety and reliability of the hoist.
Design and Simulation on Inspection Robot for High-Voltage Transmission Lines
Authors: Wang Yong Gang , Yu Hua Dong , Xu Jin Kai
Published: August 2014

In view of the deficiencies of current inspection methods on high-voltage transmission lines, the paper introduces a kind of inspection robot from two parts of mechanical structure and control system. A three-arm structure is adopted in the mechanical structure, while the control system is composed of the supervisory control subsystem on the ground and the body control subsystem. The PC/104 and AT89S52 are used for the master controller and control chip, and the BLDC is used for the power drive component. Through the simulation analysis by Matlab/Simulink, the anti-interference performance and speed control performance of the walking wheel motor control system is explored. Besides, conclusion that the walking wheel motor control system meets the requirement of speed is drawn.
Design of Phase Synchronization Unit for Active Power Filter in Superconducting Magnet Power Supply
Authors: Chen Si Ming , Liu Xiao Ning
Published: August 2014

In this dissertation, a method is given to solve the problem of phase synchronization for active power filter (APF) which is used in superconducting magnet power supply (SMPS). Firstly, the characteristics of the SMPS are introduced and the technical difficulties which will influence the phase synchronization are pointed out. Secondly, in order to solve these difficulties, the synchronization design is based on zero-cross detection, Butterworth filter and phase compensation for practical purposes. Because the APF adopts DSP as the digital controller, the phase compensation can be easily achieved by software design. In the end, the experimental results of a prototype have verified the effectiveness of the proposed design and the APF can trace the frequency and phase of primary input voltage effectively.
A Single-End Method for Fault Section Estimation in Distribution Network Using Wavelets
Authors: Ye Lei , Song Yuan Chao , Li Cheng Huang , Wu Ling
Published: August 2014

The paper presents a method for identify fault section in distribution network, which uses the traveling wave data recorded at the substation only. After modal transformation, the aerial mode component is in stable velocity and low attenuation and utilized in the method. Compared to the first wave head, subsequent wave heads of aerial mode component have some particular characteristics with time delay and wavelet transform modulus maxima (WTMM) ratio. The number of characteristic wave heads (CWHs) which are judged by characteristic time delays (CTDs) is the criteria to identify the fault section. The simulation results verify that the method has high accuracy.
Application of Random Average Method in Remain Useful Life Prediction of Rolling Bearing
Authors: Wang Ze Wen , Li Wei , Zhou Gong Bo , Wu Bo
Published: August 2014

Remain useful life (RUL) prediction technology which is significant in the condition based maintenance (CBM) is a hot research topic nowadays. Rolling bearing is a basic component widely used in the mechanical industry, and its reliability affects the operation of rotating machinery. On the basis of traditional RUL technology for rolling bearing, a method named random average method (RAM) is introduced into RUL prediction and the implementation of it is instructed in detail via the processing of vibration data in full life of rolling bearing. Compared to traditional method, the proposed method based on RAM is better in both accuracy and timeliness.
The Kitchen Vehicle Pressure Autocontrol System Based on SC-UWB Technology of Internet Things
Authors: Yang Han , Zhang Hai Ying , Li Zhi Qiang , Yang Hao
Published: August 2014

This research was carried out according to the actual needs of plateau kitchen vehicle. However, these military equipments have played important roles in the military exercises, earthquake relief, and other major activities, they does need urgent improvements in the using process. Among those problems to be solved, drift distortion of pressure cooker signal transmission on account of low temperature of high altitude, inability of achieving accurate control, and untimely feedback of service demand included. The pressure automatic control system of plateau kitchen vehicle which is based on Single Carrier Ultra Wide Band (UWB) wireless technology (SC-UWB), will completely solve the above problems, and the followings are innovations of this study: Firstly, Single-carrier ultra-wideband wireless transmission technology was used in this study, which was in accordance with Chinese Standard and based on chips produced by China. This would satisfy the needs of real-time transmission in pressure and temperature information under extreme environment, and solve technical problems such as signal integrity and communicational confidentiality, and this would also eliminate technical problems such as signal distortion, hysteresis, drift, high deviation repeatability of automatic control system of plateau kitchen vehicle in extreme environment. Secondly, intelligent sensor systems were connected to the Internet of things (IOT). To develop Industrial Personal Computer (IPC) according to the management system and daily use of this equipment and to lead the equipment to have node function of access to the Internet of things, would be the foundation of all kinds of beneficial exploration in the management of Internet of things, and also the guarantee of technology standard of Internet of things in military equipment of future. Then, the existing equipment can smoothly be switched in to avoid duplication of investment.
Adaptive Maximization of Power Extraction of a Single Wind Turbine
Authors: Lin Shu Yue
Published: August 2014

Nowadays the application of extremum seeking controller in various engineering industry has attracted a high research attention. Also, it is one of the best known maximum power point tracking algorithm. It can drive the output to its extreme point automatically and dynamically stabilize around the equilibrium. In this paper, it is implemented via Matlab/Simulink. The extremum seeking control scheme controls the wind turbine to operate at its optimal rotational speed adaptively. Piecewise constant input wind will be applied.
Study of the Active Power Filter for the Electric Vehicle Charging Stake
Authors: Wang Chang Ping , Zeng Shuo , Liu Jie
Published: August 2014

The electric vehicle (EV) charging stake is widely used for recharging the electric car batteries. The charging stake generally adopts switching power supply technology. It will cause serious harmonic pollution to power systems and consume lots of reactive power. Therefore, this dissertation focuses on the active power filter (APF) for the EV charging stake. Firstly, the principle of the APF are briefly introduced. Secondly, the main design and the technical difficulties are illustrated in detail. The controller of the APF is based on the DSP and the model is TMS320F2812. At last, this study is simulated in Matlab and a prototype is constructed. The simulation and the experimental results prove that the APF can functions well for the electric vehicle charging stake. It has achieved the national power quality standard.
Computer Aided Design of Auto-Location Head-Controlled Talking Machine for Visually Impaired People with Multiple Disabilities
Authors: Yeh Fung Huei , Tsay Huoy Shyi , Yang Chung Chieh
Published: August 2014

In this paper, the auto-location head-controlled talking machine has been carried out using computer aided design to solve the problem of communication with the outside world for the visually impaired people with multiple disabilities. The talking machine makes use of the infrared ray sensors to receive the signals launched by shaking the infrared ray emitter on their heads. The communication functions of Pinyin, associating Chinese character, debugging error are processed based on the single chip processor 89C52. Then the signals are transmitted into a personal computer through the RS-232 or USB interface. The pronounced software of head-controlled talking machine is created using text-to-speech system to achieve the communication with other people. This study also develops auto-location function by the CCD tracing module to adjust the infrared ray sensor and increase the accuracy of the head-controlled talking machine. The results of this study can improve the ability of communication for visually impaired people with multiple disabilities.
Power System Transient Stability Assessment Based on Critical Cutset Transient Stability Available Capacity
Authors: Wang Ke , You Da Hai , Long Ceng , Xu Peng , Pan Ling Ling , Zheng Luo
Published: August 2014

Aiming at the disadvantages of converting traditional transient stability margin into power system control measures, this paper proposes a new transient stability margin characterization method based on critical cutset transient stability available capacity (TATC). Compared with traditional transient stability margin based on fault clearance time or transient energy function, TATC can directly reflects power system transient stability margin form the view of power which is more conducive for power system planning and operation personnel to grasp system transient stability state, at the same time, is also advantageous for prevention measures and emergency control measures to be developed directly according TATC. Simulation results based on IEEE50 machine 145 bus system show that the proposed TATC can effectively characterize power system transient stability margin.