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Applied Computer Science Volume 10, Number 3, 2014

SET-THEORETIC MODELS AND UNIFIED METHODS OF INFORMATION RESOURCES PROCESSING IN E-BUSINESS SYSTEMS

In the given article is functional logistic model of commercial content processing as the content life cycle stage in electronic commerce systems proposed. The model of commercial content processing describes the information resources forming in electronic content commerce systems and automation technology simplifies the commercial content mana-gement. In the given article the main problems of electronic content commerce and functional services of commercial content processing are analyzed. The proposed model gives an opportunity to create an instru-ment of information resources processing in electronic commerce systems and to implement the subsystem of commercial content formation, management and support.

AN INFLUENCE OF THE d311 EFFECT ON THE BEHAVIOR OF THE CANTILEVER BEAM-SHAPED PIEZOELECTRIC ACTIVATOR MADE OF TWO LAYERS OF PVDF WITH INVERSE POLARITY

In the present work an example of the numerical modeling of electro-mechanical coupling of the activator in the form of cantilever beam made of two layers PVDF subjected to an inverse polarity is described. Calculations were done for static deflections at the selected voltage levels and for modal analysis with an included and excluded piezoelectric effect. The effect of active material on the behavior of the beam was examined. In order to validate the model, results of the static calculation were compared with the strict analytical solution and the results presented by other authors.

FEM ANALYSIS OF THE MODULES BODIES FOR BUILDING OF THE ROBOTS TECHNOLOGICAL HEADS

As a part the project it was necessary to design and implement accurate reducers and actuators in various kinematic solutions of modules. These modules will be possible to stack them into desired shapes, allowing them to be deployed in production machines and robotic equipment according to the specific customer requirements, e.g. technological heads. The article deals with designing and especially FEM analysis modules - technological heads for 2 and 3 axis handling and robotic systems. Designed modules - technological heads will allow correcting inaccuracies motion manipulator or less precise robot. Solving of these modules is based on the use of smart actuators consisting of engine, precise gearbox and appropriate sensing technique. Control of the motion will be implemented on the basis of information obtained from sensors placed directly in drives the positioning module and the sensors working environment according to specific requirements for each application.

A METHOD FOR MODELLING THE FLOW OF OBJECTS TO BE MACHINED IN FMS USING ENTERPRISE DYNAMICS

Owing to the complexity of technical and organizational problems that manufacturing enterprises are faced with, there is a growing interest in methods and tools that aid design of manufacturing systems. These methods and tools can be applied both to reorganize the existing manufacturing systems and to design new ones. For this reason, computer simulations are widely used in production engineering. This paper presents the application of computer simulations when designing the subsystem known as ordering of objects in a flexible manufacturing system. The simulations were performed using the comprehensive simulation software Enterprise Dynamics.

OPTIMIZATION AND DESIGN OF FOUR GRIPPER PNEUMATICAL RUBIK’S CUBE SOLVER

Robotic Rubik's solver is an excellent example of science popularizing mechatronic device, since it combines knowledge of several technological fields including computer vision techniques, advanced numerical algorithms and control of industrial pneumatic components with popularity of Rubik's cube in one resulting device. 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.

THE USE OF COMPUTER IMAGE ANALYSIS IN DETERMINING ADHESION PROPERTIES

The paper discusses the use of computer image analysis in determining adhesion properties of materials, including the work of adhesion and surface free energy components. Also, it discusses methods and operators for edge detection employed in the determining of geometrical parameters which are then used as the basis for calculations. In addition, the paper presents an example of expanding the scope of investigations through the application of new IT solutions.

A HIGH-LEVEL PETRI NET MODEL OF QUEUEING PRODUCTION SYSTEM

In the paper a high-level Petri model for widespread queueing networks in production systems with many customers, several queues with independent production buffers and different service nodes is presented. Requests can be either single- or polytypic. Such parameters of system as productivity, queue length and waiting time are evaluated.

ANALYSIS OF LOAD TRANSFER INTO COMPOSITE STRUCTURE

The paper presents advantages and disadvantages of metal foils insertion between composite layers. Composites are complex materials of anisotropic structure leading to various failure mechanisms. Mechanism of compressive load transfer into composite laminates by shear of the matrix is analysed. The method of improvement compressive strength of laminates is presented according to literature and analysed for a selected case. Simplified models of a laminate structure modified using various metal foils configurations are analysed with MSC.Marc code. Axial stress in prepreg layers and shear stress in adhesive layers are studied.