COMPUTER IMPLEMENTATION OF RECURSION ALGORITHM DETERMINATION OF THREAD TENSION DURING FORMATION OF MULTILAYER FABRICS FROM POLYETHYLENE THREADS
Authors: SHCHERBAN VOLODYMYR , MAKARENKO JULY , KOLISKO OKSANA , HALAVSKA LUDMILA ,   Kyiv National University of Technologies and Design, SHCHERBAN YURYJ ,   Kyiv Professional College of Applied Sciences
Published: September 2021

Multilayer fabrics made of polyethylene threads are widely used for products of real property and tactical equipment of servicemen capable of protecting the human body from the influence of firearm, cold, cutting, spiny weapons, shock and shock-fractional influences. Optimization of the process of their manufacture is to optimize the tension of the main polyethylene threads in front of the formation zone. To do this, it is necessary to determine the change in relative tension on zones of filling of polyethylene threads on a loop. The execution of this complex task should be based on the use of specially designed computer programs. Taking into account the specifics of the processing of threads on a weaving machine, when determining the relative tension in each individual zone, it is necessary to use a recursion algorithm when the initial tension of the thread from the previous zone will be input for the next zone. Designing new and improvement of existing technological processes of processing polyethylene complex threads on weaving machines requires a change in relative tension on zones of refueling of basic threads. The execution of this complex task should be based on the use of specially designed computer programs using a recursion algorithm. Determination of the change in relative tension on zones of filling of polyethylene complex threads on weaving machines, taking into account the material of the guide, will improve the technology of manufacturing multilayer fabrics that are used to manufacture products of real property and tactical equipment of servicemen capable of protecting the human body from the influence of firearms, cold, cutting, spiny weapons, shock and shock-fractional influences. Improvement of existing technological processes of processing polyethylene complex threads on weaving machines will reduce the downtime that arise when breaking the threads. This negatively affects the productivity of weaving machine tools, reduces the quality of multilayer tissues. Minimization of tension in each line of refueling line of basic polyethylene complex threads will reduce the likelihood of a cliff of the thread, which is important for improving technological processes from the position of increasing the productivity of weaving machine tools and the quality of multilayer tissues. Mathematical provision of a computer program requires the development of thread interaction models with surfaces of scala, framing guides, holes of the remission framework taking into account the real physical and mechanical properties of complex threads and yarns and their real geometric and constructive parameters. The main factor affects the growth of the tension of polyethylene complex threads is the force of friction. It characterizes the friction properties of the threads and conditions of their interaction with the surfaces of the scala, framing guides, holes of the striped frames.