Matsyshyn Y. Improving the resource use efficiency in blanks production from lumber.

The object of the research - the process of blank production from lumber. The aim of the research - increasing of resource use efficiency for blanks by choice of rational variants of lumber cutting. Methods of research - simulation, exhaustive search method, theory of fuzzy sets, method of genetic optimization, object and orientation program, method of passive experiment, method of mathematical statistics. Scientific innovation. Simulation of informal procedures for making of current decisions by operator was used for the first time at the choice of rational variants of lumber cutting into blanks. Methods of the theory of fuzzy sets were used for consideration of the natural uncertainty of length of defect-free areas. Simulation of operator study under multiple implementation of cross cutting technological operations was provided by genetic algorithm. The increasing of resource use efficiency of lumber cutting into blanks was observed at this approach. It was found that there is no reason to reject the hypothesis of the possibility theoretical description of length distributions of defect-free areas by log-logistic distribution regardless of tree species and cross section of defect-free areas. Thus, simulation of lumber cutting into blanks in conditions of a priori uncertainty of lumber number and length of defect-free areas and evaluation of coefficient specification yield of blanks was performed. Practical value. The using of developed models and specialized software in working conditions will allow to predict blank yield and to reduce lumber consumption for blank specification as well as to determine lumber allowances for blanks according to their quantitative and size-quality characteristics. Recommendations concerning improving of resource use efficiency of lumber cutting into blanks and proposals for technical design of system control of line cutting optimization for lumber into blanks were developed. Recommendations about realization sequence of cutting blanks considering their size-quality and quantitative characteristics under lumber cross section cutting were justified. Main results of thesis were used for perfection of technology of lumber cutting into blanks in OOO "ENO MEBLI LTD" (Mukachevo) and OOO "Dobrobut" (Skole). Sphere of using: woodworking.