THE USE OF A TACHOGENERATOR AND AN ADJUSTABLE ELECTRIC DRIVE TO REPLACE THE MECHANICAL CONTROL CHANNEL FOR SYNCHRONOUS-TRACKING SORTING DEVICES FOR ROUND TIMBER
Authors:   Toraigyrov University, Sarbasova Nurbanu , Umurzakova Anara ,   Kazakh Agrotechnical University. S. Seifullina, Kladiev Sergey ,   National Research Tomsk Polytechnic University
Published: May 2022

Relevance Automated sorting of timber is one of the main types of work in modern timber warehouses, timber processing and woodworking enterprises. The choice of a sorting device is determined by the cargo turnover of the warehouse, the assortment composition, the sorting fraction and the conditions for the shipment of timber to consumers, as a rule, when sorting round timber, chain timber transporters (log haulers) are mainly used. The main elements of longitudinal sorting timber transporters are: drive, traction and tension devices, overpass with timber storage. With automated sorting, longitudinal conveyors are equipped with log ejectors and command devices (sorting devices) that provide automatic control of their work. Command devices are divided into two groups: local and synchronous-tracking sorting devices. The group of synchronously-tracking sorting devices contains an analog or discrete carrier, the information on which must move synchronously with the movement of the chain conveyor of the log haul. However, to fix the movement of the conveyor, one element of the kinematic scheme of the conveyor is available – this is the shaft of the driven or driving hexagonal wheel of the chain conveyor. For a group of synchronously tracking sorting devices, the synchronization of the sorting device with the movement of logs to storage bins and dumpers is of great importance. The average rotational speed of the driving and driven wheels of the chain conveyor and, consequently, the linear speed of movement of round wood on the chain conveyor is constant. Thus, the following positions can be attributed to the positive properties of synchronous- tracking sorting devices: automatic maintenance of all forest storages by one sorting device without additional elements that correct the process of turning on log throwers. The negative points include a significant inaccuracy in the control of log throwers, which predetermined the small introduction of a mechanical ball drum of orders. Therefore, further research into the technology of transporting logs on timber conveyors, taking into account the synchronization of the operation of the log sorting device, is an urgent scientific and technical task. Aim of research To identify new solutions and trends in their development in the field of development and research of ways to control the sorting device on sorting timber conveyors. Research methods Bibliographic analysis, statistical processing methods, simulation modeling. Results To control discrete and continuous synchronously-tracking sorting devices, a method for implementing a control channel based on a tachogenerator and an adjustable electric drive is proposed, the possibility of controlling the speed of the control channel and controlling continuous sorting devices without the use of additional means is considered and proved. In the study, a simulation method was used in MatLab 2021a, which makes it possible to verify the operability of the developed implementation of the control channel, and to evaluate the errors in the performance of the control channel. The simulation results confirmed the possibility of practical application of the proposed method for implementing the control channel. Based on the results obtained, it can be concluded that this method of implementing the control channel can be used to control discrete sorting devices. The study used the simulation method in MatLab 2021a, which allows you to verify the operability of the developed implementation of the control channel, and evaluate the errors in the performance of the control channel.