Vol 30, No 2 (2024)

An attempt was made to develop a methodology for the integrated design of workable (flexible) technological processes, devices and systems (bio- and chemical-technological) and to formalize possible approaches to solving problems of optimizing design parameters and operating variables (optimal tasks for regulators of an automatic control system ) at individual stages of a multi-stage iterative procedure for solving the problem of integrated design of technological systems under conditions of uncertainty. The formulation of one- and two-stage optimization problems in integrated design takes into account the presence of interval uncertainty of factors, which, provided they are solved, allows us to hope for achieving safe and optimal (in the sense of a minimum of reduced costs, the cost of manufactured products and other indicators of production efficiency) functioning of technological processes, devices and systems regardless of the presence of uncertain factors in the source information.

The problem of modeling evacuation from industrial facilities is considered. Modern algorithms and models of evacuation, the spread of fire and smoke are described. In the Delphi programming environment, a software application has been developed to simulate the evacuation of employees in the event of an emergency, taking into account the spread of flame and smoke, which implements an individual flow model. Approbation of the software application for various cases of evacuation is presented.

The article discusses approaches to managing a technical system for output quality control of manufactured products using artificial intelligence methods. One of the components of the final quality control system is a technical vision system, which allows for visual inspection of manufactured products. The accuracy of such a system depends on the quality of the resulting images, the main indicator of which is clarity. The authors examined the management features of the technical system for output quality control, and determined the main goal of the control – obtaining an image of a given clarity. The camera position and external parameters (lighting, conveyor belt speed, etc.) are controlled by a neural network. The article shows the main stages of its training and provides an assessment of the effectiveness of its use. The proposed solution allows for output quality control of manufactured products with high accuracy without the use of manual adjustment or fine-tuning of executive equipment and can be used in various subject areas.

A digital twin of the process of interaction of molecular systems allows for computer simulation, as a result of which a complex molecular system can be obtained. The production rules and parameters of the process of modeling the interaction between two molecular systems, compiled on the basis of previous experiments, are described. The use of a new technique and a formalized description of knowledge increased the speed of selecting parameters when constructing a digital twin of the process of interaction of molecular systems and made it possible to significantly reduce the time spent on modeling. A diagram of the knowledge base based on production rules is presented for automated and informational support for decision-making in the selection of geometric parameters during the interaction of molecular systems. Conclusions are drawn about the effectiveness of the developed methodology for selecting geometric parameters when compiling a complex molecular system using production rules.

To increase the accuracy characteristics of information measuring and control systems (IMCS) using tertiary information processing, performing the tasks of dispatching support of maneuvering aircraft in the airfield area, as well as to increase the system capacity while maintaining a given level of safety, the IMCS structure is proposed using the method of weighted tertiary information processing with a posteriori weight coefficients that take into account changes in the range discrepancy to the aircraft at each step. The proposed structure is distinguished by the presence of range discrepancy meters in the Kalman filter of ground-based radar stations (radars), a calculator for the weighting coefficients of the control room, in which the weighting coefficients are determined at each step, taking into account the range discrepancy values obtained from the calculators of each of the radars.

A methodology for conducting experimental studies of the bulk materials mixing process in a continuous-acting apparatus with additional working elements has been developed. In accordance with this methodology, studies of the influence of design parameters on the quality of the resulting mixture were carried out. The obtained mixing curves can be used in the design of new devices. The experimental dependences are compared with the results of numerical simulation.

of the behavior of particles in the mixer was carried out using the discrete element method. A computer simulation of the interaction of particles of mixed components in a mixer was carried out. Using the Altair EDEM program, graphical dependences of the main characteristics of the interaction of particles of mixed materials were obtained.

The possibility of using electromembrane separation in the purification of process solutions from synthetic surfactants is considered. In order to study the influence of the parameters of the separation process on the main kinetic characteristics, experimental studies were carried out on the specific productivity and retention coefficient of MPFC-2G, MMK 0.45 and MPFC-0 membranes when purifying process waters from trisodium phosphate and sodium tripolyphosphate. Criterion dependencies for calculating mass transfer during electromembrane purification of process solutions from synthetic surfactants have been proposed for use. A mathematical description of the kinetics of mass transfer during electromembrane cleaning has been developed, which is used in the methodology for calculating an electric membrane apparatus for removing synthetic surfactants from process solutions. A technological design for the process of electromembrane purification of technological solutions from synthetic surfactants is proposed.

A theoretical study of the deformation of an elastic rod moving under the action of a suddenly applied longitudinal force was carried out. An explicit function of the dependence of the absolute deformation of the rod on time Dl(t), which does not contain trigonometric series, is obtained; the nature of its deformation during movement was revealed. A practical recommendation is given based on the research results.