Browsing by Author "Пальчевський, Богдан"
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Item Методика оптимізаційного синтезу пакувальних машин із застосуванням генетичного алгоритму(Видавництво Львівської політехніки, 2011) Пальчевський, Богдан; Вараніцький, ТарасРозглянуто методику оптимізаційного синтезу структури пакувального автомата за допомогою генетичного алгоритму та описано конструкцію згенеровної машини. Evolutionary search methods successfully combine the advantages of heuristic methods and methods of mathematical programming. The genotype of packaging machine is presented by the set of genes, each coding the particular functional module of a machine: · product feeding tube; · forming collar · longitudinal seaming module ; · drawing module;· cross-seaming module; · cutting module ;· mechanisms of fold formation;· mechanisms of forming the bottom and the top of a package. The value of each gene at the start is determined by pseudorandom number generator and may be changed by mutation operator during the genetic algorithm run. The structure of a machine is optimized by several criteria (e.g. versatility, complexity, cost, energy, etc.) that form a complex cost function evaluating each member of the pool durnig the genetic algorithm operation. The genetic algorithm ends up with bulding a histogram (fig. 1) presenting the genotype of the optimal result. The phenotype is obtained by decoding the value of each gene. The 3D result models of several genetic algorithm runs are presented on fig. 2-4.Item Процедури оптимізаційного синтезу пакувальних машин(Видавництво Львівської політехніки, 2011) Пальчевський, Богдан; Шаповал, ОльгаПроцедури оптимізаційного синтезу пакувальних машин. Розглянуто процедури оптимізаційного синтезу структури пакувальних машин модульної будови. A basic task of packing machine (PM) design is providing the implementation of its main function - making goods of the set quality with minimum costs. Since the main function can be realized in different ways, the definite amount of possible principles of action of the machine arises. In order to define the best variant of the machine structure, it is necessary to carry out its optimization synthesis. Optimization synthesis consists of the following procedures: 1. Formalization of the initial data. A packing machine as the object of design is examined in two aspects: as the set of functions and as the set of the functional modules (FM) for realization of these functions. FM are combined with each other to form the array of the structure variants. 2. Defining the criteria of optimality. The criteria of optimality are parameters, that determine efficiency of the machine. 3. Database forming. On this stage the list of typical FM included in the machine is created. Each is characterized by the values of the optimality criteria, that may be predifined or indetified experimentally. 4. Defining the task of optimization. As a rule, it can be presented as a target function with a technical and economic parameters. 5. Synthesis of the alternative packing machine structures. Forming of variants occures according to the algorithm of combining various FM in accordance with the implementation of functions, that are essential for realization of the process operation of packing. The specificity of generation of the PM structures depends on a method applied for realization of the procedure, however it should foresee the rational combination of FM, that do not conflict with principle of functioning of the PM. 6. Searching for the optimal decision. It means the search of such variant of the PM structure, that best satisfies the constraints of the given task.