V. E. Isaev DYNAMICAL MODELING OF TECHNOLOGICAL SYSTEMS IN "EULER"
While deciding on dynamical task of technological system modeling CAE "Euler" have been used.
For technological systems' models creation the construction was divided by several levels using decomposition method. This method allows creating typical description of each module of system on the basis of key elements such as "box", "cylinder", "joint" which are stored in programming modules' library. This method also allows to initiate an analyses of system in whole and also by elements and components.
Efficiency of developed methods and use of "Euler" for deciding on dinamical task was evaluated after creation and research of model CNC lathe kinematics. The model was presented in terms of aggregate levels (gearbox, bed, cross slide) and elements levels - each aggregate is being decomposed by separate elements (shafts, gears, and bodies). Then these separate elements were combined in a special way in aggregates. After that those aggregates were combined in general model of machine. While describing movable components of machine "gearing", "screw-nut couple", "advance couple", and "rotational couple" were used. The next step was identification of load (forces and moments). For model's analyses sensor were installed: data which they produced, were presented in charts and tables. Final results allow creation of technological preprocessor CAM.
S.V.Pavlova CONSTRUCTION OF THE EVOLVEMENT FOR CLOTHES DESIGNING
Flexible objects are inherently more difficult to model than rigid objects. Until about a decade ago, computer graphics was limited to modeling rigid objects, but subsequent advances in algorithms and graphics hardware now support the processing of flexible objects.
Textile science has concentrated studying a material’s behavlor according to its mechanical properties. Textile engineers investigating clothes modeling problems have generally focused on deriving accurate models or methods to measure the properties of clothes. The overall shape of a cloth was not of major interest. For next working on computer with clothes model different methods are used (physical and geometrical) that accurately generate the shapes of cloth objects and link them with CAD/CAMs systems.
Clothes has complex geometrical base and to describe it accurately and quickly requires long-term research. Research workers in the textile and graphics community need to tackle these problems collaboratively.
Therefore in East-Siberian State University of Technology the method of 3D-construction for surfaces of the difficult forms is developed. The examines reception of evolvement of difficult nondevelopable surfaces on a plane. In the submitted way the geometrical device of work with difficult nondevelopable surfaces is considered.
This method can be applied to designing of clothes. The method is based on construction of evolvement details, which incident to envelope developable surface.
In mining of mineral oil by means of extreme-pumping arrangments, there often appear the necessity of measuring of the mechanical forces in its polishing stock. As the sensitive element of the sensor allocated dirrectly on the suspension of the polishing stock, it is used the thin-wall steel cylinder possessing high elasticity. The accuracy of measuring of forces appearing on the polishing stock depends on option of geometric dimensions and material of the sensitive element.
Our paper considers the computer design of the sensitive element for the sensor of mechanicals forces.
The measuring sensor of less linears transferences ( (0250)*106m) is allocated in the internal point of such sensitive element. Therefore, the geometrical dimensions and material of the sensitive element in deppendence on mechanical forces have to support the necessary deformation. So, we define horisontal-diametrical tranference of flatness of the longitudinal section perpendicular to the forces direction. By means of elasticity theory it is defined the mathematical model of horisontal-diametrical transference(Ur) of the sensitive element expressed as:
Ur = P*(a+b)/E*N*L*(1-)*(b2-a2+b2*ln(b/r)+a2ln(r/a))*5*r+
The present mathematical model is realized on artifical intelligence language PROLOG. The obtained results support practicals requirements in measuring of mechanical forces in the electro-magnetic sensor.
H.M.Akhmedova THE COMPUTER- AIDED-DESIGN OF THE CONTROL SYSTEM FOR THE FLEXIBLE MANUFACTURING SYSTEM
The paper considers the questions of Computer-Aided-Design (CAD) of the flexible manufacturing system(FMS) control system, that supports computer experiments of FMS functioning on the stage of the system-technical design. The basic features of the CAD concludes in the following: it is created for practical application of the Petry-net as simulation unit during the design and analysis of FMS; round all stages FMS creation, and gets the software that supports FMS working with the real objects.
For the work of the CAD it is created the knowledge base (KB) on the following levels: on the subject level (the FMS structure, type models of the active elements, basic characteristics of the real elements, description of productions-functioning); on the mathematical level (generation of the structural model of FMS, rough mathematical model as the Petry-net, the mathematical model as the production system); on the software level (the functioning algorithm of the software for the functioning algorithm of the FMS).
The CAD has a possibility of function description and active elements of FMS by means of three methods: final automats; parallel-functioning of asynchrons process, and production system in deppend on complex and functional nomination of the individual object.
The description of the FMS functioning in one of the three methods transformates the Petry-net model and gets rough model of the FMS. It shows the expediency of FMS development by the results of the basic attributes of the Petry-net, that supports the necessary production and functioning in the real time and forms the mathematical model of the FMS functioning model as the production system. By means of the production system and generating structural model of the FMS there are done the computer experiments in differents regimes of work.
This CAD used in FMS design of pumping-compressors pipes, implemented in the Azerbaidjan Pipe-Rolling Factory, proved to be essential and economically effective.