Applied Mechanics and Materials Vol. 474

Abstract: The paper describes the results of real simulation project in production line. The aim was to optimize the number of workers according to the different orders during one working week, to minimize time for orders realization with using the alternative technological processes, to minimize the length of order processing at maximum the number of workers on the shift. The simulation optimization was used for solution finding.

Abstract: The paper deals with the safety analysis for dynamic technological systems. The analysis is performed in the phase of control system development. The SQMD method has been proposed to use for safety analysis of dynamical systems. We created models for safety-critical states of system using this method. The models are divided to qualitative and quantitative. Qualitative models are created by using of fuzzy logic. There we will use the knowledge and experience of safety analysis of similar systems. Quantitative models are constructed by using of differential and difference equations. Mathematical models are verified by simulation. Hybrid models for individual safety-critical states are constructed by synthesis of qualitative and quantitative models. Finally is performed on-line monitoring and fault detection in real system by using these hybrid models.

Abstract: Mass customization provides products with high variety on demand, at a cost not significantly greater than mass production. Problem at this point is that these product variants lead to process/resource variants what has a negative impact on complexity of manufacturing complexity of such products. In this paper, we present a methodological framework for creating all possible product variants based on unlimited number of optional components while assuming with at least two constant initial components. Development of all possible product architectures is further applied for investigation the impact of product variety decisions on structural complexity of assembly processes. According to the assembly process variants created a specific complexity measure can then be assigned.

Abstract: The aim of this interactive game is a thorough insight into industrial engineering method called SMED (Single Minute Exchange of Die). This method is focused on reducing changeover time of machines or lines. The rapid changeover is nowadays one of the most important issues ensuring a sufficient flexibility of an enterprise. SMED game is designed for a flexible usage in terms of number of players involved in the game and length of playing time. Specifically, it is usable for one to twelve players and playing time can be set from one to four hours. Main goal of the game is an application of entire conception of SMED method.

Abstract: This paper presents the concept of the system adding designer work using fuzzy analysis of the notes of design requirements and solutions. Design requirements are generated basing on the proposed model of the technical mean life cycle. It includes three phases of life of a technical mean: its formation, its existence and its liquidation. In this perspective there are examined five general requirements associated with: the technical need, a man, the technical culture, the society and the environment. The design solutions are created basing on the concept of an universal structure of technical means. The structure of the system has following components: structural system, drive system and control system. Structural system is determined as the integrator of the whole structure of a complex technical mean. The drive system is secondary to the structural system. The third in the order of the systems is the control system. It is developed last so it must take into account the solutions developed for the structural system and the drive system. Generating constructional solutions is carried out in the three distinguished features of a construction: geometric, material and dynamic. The presented methodology is illustrated by the example of designing specific technical mean.

Abstract: This paper shows the application of an incremental modelling and numerical solution of the contact problem between movable elastic or rigid tool and elastic/visco-plastic bodies developed in [ to the numerical simulation of drawpiece forming process for the case of rigid tool (punch and die block) and elastic-plastic body (drawpiece). Also the current state of knowledge of the subject matter of the drawing process, modelling and simulation of this process is discussed. The latest and unconventional methods of drawpiece forming have been presented. The important factors determining the proper formation of drawpiece and the ways of their determination have been described. Three types of material models have been used: elastic-plastic model with the linear hardening, elastic-plastic model with the power-law hardening and Frederic's Barlat model which takes into account the anisotropy in three main directions and three tangents. For an example of selected simulations, dependence of punch force from its displacement for different types of die blocks has been presented.

Abstract: Paper presents the modelling of the contact problem in the technological processes. Technological processes were considered as a geometrical and physical boundary and initial value problem, with unknown boundary conditions in the contact zone. An incremental model of the contact problem between movable rigid or elastic body (tool) and elastic/visco-plastic body (object) in updated Lagrange formulation, for spatial states (3D) was considered. The incremental functional of the total energy and variational, non-linear equation of motion and deformation of object on the typical step time were derived. This equation has been discretized by finite element method, and the system of discrete equations of motion of objects was received. For solution of these equations the explicit or implicit methods was used. The applications were developed in the ANSYS/LS-Dyna system, which makes possible a complex time analysis of the states of displacements, strains and stresses, in the workpieces in technological processes. Application of this method was showed for examples the modelling and the analysis of tensile test [1 and technological processes of metal forming [1-.

Abstract: This paper presents a complex project, implemented in CATIA V5 environment, used for mechanical design and prototype obtaining of the single-cylinder engine block. The main features which are implemented allow reducing the time for design, using the end user design parameters for the prototype manufacturing, reducing the material consumption, optimization of the numerical control technology for milling process. The paper also presents a software system, developed with Visual Basic in CATIA environment, which can be used to automate the process of 3D model generating, creating the data files for rapid prototyping equipments, designing of CNC machining technology, and automatic generating of the numeric control files for the milling process using multi-axes machining centre. The NC files are verified using simulation capabilities of the virtual environment provided by CATIA V5.

Abstract: In this contribution are designed complex methods of image processing as (binarization image, tresholding, edge detection) with specific method selection, which is used in the camera system of assembly process. The contribution proffers of problems resolution, which are present by assembly components scanning. These components are assembled in the system ICIM. This system is situated at the Institute of Production systems and Applied Mechanics. Assembly configuration, which is assembled in this system consists from for elements. The contribution describes mathematical function of digital image by scanning of assembly components.

Abstract: The wide potential applications of humanoid robots require that the robots can move in general environment, overcome various obstacles, detect predefined objects and control of its motion according to all these parameters. The goal of this paper is address the problem of implementation of computer vision to motion control of humanoid robot. We focus on using of computer vision and image processing techniques, based on which the robot can detect and recognize a predefined color object in a captured image. An algorithm to detection and localization of objects is described. The results obtained from image processing are used in an algorithm for controlling of the robot movement.