Integral method for evaluating the activity results of main offices of EMERCOM of Russia for the subjects of the Russian Federation

Предложена математическая модель и рассчитаны значения риска причинения вреда (ущерба) в результате пожаров в субъекте Российской Федерации. Субъекты Российской Федерации распределены по категориям уровня обеспечения пожарной безопасности в зависимости от расчетного значения риска причинения вреда (ущерба) в результате пожаров в субъекте Российской Федерации. Предложены оценки результатов деятельности ГУ МЧС России в зависимости от риска причинения вреда (ущерба) и категории уровня обеспечения пожарной безопасности, к которому отнесены субъекты Российской Федерации. The regulatory legal acts of the Russian Federation establish that the criteria for assigning objects of control to the categories of damage risk should be formed based on the results of the damage risk assessment. In the developed countries of the world, as a rule, the distribution of objects of control by risk categories is used to justify the frequency of their inspections and is carried out depending either on the point risk assessment or on the number and seriousness of violations of mandatory fire safety requirements identified during the inspection of the object of control. In the literature sources there are no mathematical models for determining the damage risk as a result of a fire in buildings for evaluating the activity results of fire authorities (Main offices of EMERCOM of Russia). The purpose of this work was to develop and test a mathematical model for evaluating the activity and rating of the Main offices of EMERCOM of Russia for the subjects of the Russian Federation based on the category of fire safety level. As a criterion for assigning the subjects of the Russian Federation to different categories of fire safety level it is proposed to use the damage risk as a result of a fire in buildings located on the territory of the corresponding subject of the Russian Federation. The mathematical model has been developed to determine the damage risk of causing harm (damage) as a result of a fire in a building and there is given its assessment for buildings on the territory of each subject of the Russian Federation. There was carried out the distribution of the subjects of the Russian Federation according to the categories of fire safety based on the calculated value of damage risk. It is shown that such distribution significantly depends on the objectivity of statistical information on fires and the number of buildings on the territory of each subject of the Russian Federation. The assessment of the activity results for each of 86 EMERCOM of Russia Main offices was made and they were rated based on the category of fire safety level of the corresponding subject of the Russian Federation.

CONSIDERATION OF THE "CONDITION-BASED" ALGORITHM OF AVIATION EQUIPMENT OPERATION WITH THE USE OF GROUND MEANS OF TECHNICAL CONTROL AND ON-BOARD MEASURING SYSTEMS IN THE STATE AVIATION OF UKRAINE

The article highlights the main aspects and features of the algorithm of aviation equipment operation "condition-based" with the use of ground technical means of control and on-board measuring systems and the formation of decision- making principles for further operation of aircraft. To develop methods of technical diagnostics of any technical equipment, it is necessary to identify which parameters characterize its condition and reliability as well as to establish diagnostic criteria and limit values of the controlled parameters. Depending on the nature of the parameters being controlled, there are parametric and physical methods of diagnostics. Based on the results of the diagnostics, we must get a straight answer: whether or not it is necessary to perform repairs or maintenance of the equipment being tested, taking into account the ensuring of failure-free operation before the next diagnostics. Currently, a large number of different measuring equipment that can measure signals that meet the parameters of the object of control and diagnostics are successfully used to objectively determine the technical condition of aircraft. The use of the laboratory for technical diagnostics of aviation equipment in conjunction with on-board measuring systems will provide an opportunity to make a quality technical diagnostics and reasonable conclusion to decide on further operation of the sample of aviation equipment. The use of mentioned laboratory will also predict the occurrence of failures of aviation equipment systems and units. Only a comprehensive approach to the technical diagnostics of aviation equipment with employment of all means of technical control (ground, on-board) will prevent sudden failures of aviation equipment systems.

CRITERIA OF SAFETY CONDITION ASSESSMENT

The article is the second in a series of articles, united by a single theme of improving the organization of the country’s security management system. The article is completely based on the previous article “Formalization of safety assessment and management” and is a continuation of it. Accordingly, the article uses a unified approach to improving the organization of the management system, the same terminology and notation. It has been determined that the safety assessment significantly depends on the operating conditions of the control object. The approach to formation of structure of criteria of an estimation of a condition of safety on the analysis of full group of conditions of functioning of object of protection and the account of threshold values of complex criteria of an estimation – positive and negative potentials is offered. The possible structure of formation of a complex criterion of safety assessment is considered. The effectiveness of the proposed safety assessment system is based on the formalization of the signs of threats and risks through the analysis of potentials relevant to the object of management. Representation of the object of control in the form of a formal model and the use of a safety chart allows to analyze the safety status on formal grounds and analyze using the proposed comprehensive criterion. The formalization of the safety assessment procedure and the quantitative interpretation of the potentials allow the maximum use of computer information processing in order to timely objectively identify threats, conditions and risk areas.

Risk-Oriented Model of the Distribution of Buildings (Structures) by Categories of Risk of Causing Harm (Damage) as the Result of Fire to Substantiate the Frequency of Scheduled Inspections of the Buildings (Structures)

Normative legal acts of the Russian Federation establish that the criteria for assigning control objects to the categories of risk of causing harm should be formed based on the results of the assessment of the risk of causing harm. In the developed countries of the world, as a rule, the distribution of objects of control by risk categories and the substantiation of the frequency of their inspections are carried out depending either on the point risk assessment, or on the number and importance of the violations of mandatory fire safety requirements revealed during the inspection of the object of control. The purpose of this work is to substantiate the frequency of scheduled inspections of the objects of control by the state fire supervision bodies depending on whether the objects of protection belong to a particular category of risk of causing harm. As a criterion for assigning control objects to various categories of risk of causing harm, it is proposed to use the risk of causing harm (damage) as the result of fire in the buildings of various classes of functional fire hazard, which is understood as the product of the probability of fire occurrence, the probability of causing socio-economic harm (damage) as the result of fire and the value terms of socio-economic harm (damage). A mathematical model was developed to determine the risk of causing harm (damage) as the result of a fire in a building, and an assessment of its values for the buildings of various classes of functional fire hazard is given. Distribution of the buildings by categories of risk of causing harm (damage) was carried out depending on the calculated value of the risk of causing harm. It is shown that the distribution of control objects by risk categories significantly depends on the degree of detail in the fire record card of the characteristics of the building in which the fire occurred. The optimal terms for carrying out scheduled inspections of the objects of control are proposed depending on the category of risk to which they are assigned. Proposals are formulated concerning the improvement of the risk-oriented approach in the activities of the state fire supervision bodies of the EMERCOM of Russia.

Methodology for assessing the uncertainty of measurements of mechanical stresses by the ultrasonic method with the help of an optical-acoustic separate-combined transducer

The work is devoted to the ultrasonic method of controlling mechanical stresses using ultrasonic head waves. The factors that contribute to the result of measurements of mechanical stresses include: the propagation velocity of the head ultrasonic wave, the temperature of the environment and the object of control, the coefficients of acoustoelastic and thermoacoustic coupling, parameters of the optical-acoustic transducer. The contribution of each of these factors to the results of measurements of mechanical stresses is assessed. A technique for assessing the uncertainty of measurements of mechanical stresses by the ultrasonic method using head waves has been developed.

Research aspects of modeling and automated process control photopolymerization

This paper provides an overview of the state of existing systems of predictable control of the polymerization process. It includes a literature and patent survey of the presented mathematical models of the processes that occur during chemical polymerization reactions and analyzes techniques of controlling the processes of designing, manufacturing, modeling and construction of automated control systems. A critical analysis of existing modeling and control systems is given. The most promising software complexes ready for use in the process of designing of materials and products from photopolymers with predetermined structural properties have been identified. The analysis of a standard technological process as an object of control, by the example of the presented algorithm of the functioning of a particular production unit, showed the possibility of improving the existing automated systems of its control. By this example the authors prove the possibility of constructing automated process control systems, as well as those of photopolymerization, which will stabilize physical and chemical processes when manufacturing products from photopolymers. At the end of the research it was made possible to determine the purpose and objectives of further research of the authors aimed at creating the following complex: a software for the development of materials with specified structural properties; development of mathematical tools for calculation and modeling of photopolymerization processes; construction of automated control systems for technological processes of manufacturing products from photopolymer structural materials.

Measurement of geometric parameters of extended objects based on the four-coordinate method with a displacement

The paper states that the diameter control in the cable industry is one of the fundamental factors in the final product quality. Such control takes place under the condition that data on the diameter of the electrical insulating sheath of the electric cable will be received continuously. It is possible to evaluate the surface quality of the cable insulation coating, to track thinning, thickening, and some other local surface defects when we receive and process data on the object of control in real time. Modern production facilities are focused on resource efficiency. It means that reducing the consumption of expensive cable materials (non-ferrous metals, alloys, glass, polymers) and insulating materials (plastic compounds, PVC, rubber, etc.) will be one of the main factors in setting up a production complex. The continuous control of the diameter has the ability to provide for such a factor, and also makes it possible to automate the adjustment of the diameter as well as the thickness of the insulation coating using the meter as a part of automatic control systems.

Operational control system of civil aicraft airborne equipment and scientific basis of its formation

The system of operational control (SOC) of civil aircraft (CA) airborne equipment incorporates onboard equipment, as an object of control, means and programs of operational control, maintenance personnel of an operating enterprise, carrying out procedures using control means and organizing processes of operational control for the specified objects using control programs. Quality of A/C onboard equipment SOC becomes obvious in the process of operational control. Operational control is a set of processes for determining the technical condition (TC) of objects of control (OC) at the various operational stages: in flight, during operational maintenance (pre-flight and post-flight control), and periodic maintenance, after dismantling equipment from board. The process of determining OC TC of includes control, diagnostics, forecasting and recovery. The process of operational control is characterized by reliability of control – the property of TC control, which determines the extent of display objectivity as a result of monitoring the actual OC TC. Based on the SOC analysis as an object of research, the analysis of the problem of its forming and updating as well as the developed hierarchy of criteria for the effectiveness of interacting systems, the general problem will be formulated as follows: on a given set of parameters of onboard equipment SOC, let us determine the parameter values so that the system costs in the process of operational control reach minimum while performing all the required tasks and observing all the limitations for own parameters of the system as well as indicators of its technical efficiency.

Development of a modular software and hardware complex for a test-stand with a space greenhouse model

Space greenhouses (SG) that can be used for enriching the astronauts’ diet are also considered a means of improving the astronauts’ life environment in autonomous crewed expeditions. One of the main requirements for SC is to minimize the specific consumption of the main onboard resources: energy, space, refrigerant, and labor-hours per unit mass of grown product. Experiments on adaptive optimization of irradiation and illumination spectrum were performed and a hardware and software complex (HSC) was developed to control the test-stand with the SG model. The main object of control is an intermittently pressure-sealed chamber with temperature and humidity sensors, as well as an IR gas analyzer. The latter determines the visible photosynthesis of the plants based on the dynamics of CO2 absorption. The sensors and actuators are connected to a Mega 2560 AVR microcontroller connected to a Raspberry Pi 4B single-board computer via a USB-UART converter. The modular software package was created on the basis of the ROS (Robot Operating System) framework, which minimizes the training period for new developers and experiment operators. The first HSC versions were successfully tested on a test-stand with Chinese cabbage to find the trajectory of optimal lighting parameters during the growth process. The HSC made it possible to carry out several replications of a 2-factor experiment to study the drift of the optimal LED lighting modes during a 10 days’ period with daily variation of 2 factors — the current in the red LED circuit and the current in the white LED circuit. Optimal change patterns in the lighting parameters for a test-stand with a space greenhouse model were obtained.

Применение технологии Plane Wave Imaging в ультразвуковом неразрушающем контроле

Image recovery of reflectors by digital antenna focusing (DFA), along with such advantages as high resolution over the entire image recovery area of reflectors, the ability to obtain images taking into account the reflection and transformation of the wave type from the boundaries of the object of control, has several disadvantages: a large volume of measured echo signals, a long image recovery time and insufficient energy of ultrasonic waves introduced into the object of control. The Plane Wave Imaging (PWI) method allows you to combine the advantages of phased array antenna technology (PHAR) and CFA technology. In the PWI mode, when a plane wave is emitted, all elements of the antenna array (AP) work, as in the FAR mode, which allows you to increase the energy introduced into the control object, and echo signals are recorded by all elements of the AP, as in the CFA mode. The image of the reflectors is restored by the raman SAFT method. To obtain an image, you can use the number of radiated plane waves less than the number of elements of the antenna array, which reduces the volume of measured echo signals. Translation of calculations to the area of spatial sectors allows you to increase the speed of recovery of the presentation of reflectors. Model experiments have shown the positive and negative aspects of obtaining images of reflectors by the PWI method in comparison with the CFA method, both for the case of using a prism and without a prism.