Photometry of the Didymos System across the DART Impact Apparition

On 2022 September 26, the Double Asteroid Redirection Test (DART) spacecraft impacted Dimorphos, the satellite of binary near-Earth asteroid (65803) Didymos. This demonstrated the efficacy of a kinetic impactor for planetary defense by changing the orbital period of Dimorphos by 33 minutes. Measuring the period change relied heavily on a coordinated campaign of lightcurve photometry designed to detect mutual events (occultations and eclipses) as a direct probe of the satellite’s orbital period. A total of 28 telescopes contributed 224 individual lightcurves during the impact apparition from 2022 July to 2023 February. We focus here on decomposable lightcurves, i.e., those from which mutual events could be extracted. We describe our process of lightcurve decomposition and use that to release the full data set for future analysis. We leverage these data to place constraints on the postimpact evolution of ejecta. The measured depths of mutual events relative to models showed that the ejecta became optically thin within the first ∼1 day after impact and then faded with a decay time of about 25 days. The bulk magnitude of the system showed that ejecta no longer contributed measurable brightness enhancement after about 20 days postimpact. This bulk photometric behavior was not well represented by an HG photometric model. An HG 1 G 2 model did fit the data well across a wide range of phase angles. Lastly, we note the presence of an ejecta tail through at least 2023 March. Its persistence implied ongoing escape of ejecta from the system many months after DART impact

Development and improvement of systems of automation and management of technological processes and manufactures

The development of means and systems of industrial automation, taking place along with the widespread use of modern information technologies, makes it possible to identify trends characteristic of this field of science and technology, and to predict the directions by which the most important changes will occur in the near future. It is shown that the main trend is a constant increase in the level of built-in artificial intelligence in control systems. From the standpoint of the most demanded and relevant areas of research and development, the driving forces and trends in the development and improvement of industrial automation systems are analyzed

HYDRO CHEMICAL CRUSHING AND CORROSION OF METAL CONCREATE CONSTRUCTIONS OF BIG PUMPING STATIONS

This article is devoted to one of the main problems of the process of hydrochemical destruction of massive reinforced concrete structures, corrosion of reinforcement in the foundation parts of buildings of large pumping stations. Based on the analysis of the conducted studies, it was found out the increased content of sulfuric acid salts and other chemical elements in groundwater, which promote the formation of calcium sulfoaluminate (cement bacillus) in the structure of reinforced concrete structures. The analysis of the conducted researches allows to draw a conclusion that the main factors that influence and intensify this process are: aggressive action of groundwater and filtration water, as well as constant influence of electric current. All these factors, contributing to the development of corrosion processes of reinforced concrete structures, lead to a significant decrease in strength properties, and in some cases, their partial destruction. In this connection, there is now an urgent need for a detailed study of the processes under consideration and the development of necessary measures to prevent and eliminate them

DIAGNOSTIC RESULTS OF PUMPING UNITS

One of the main requirements for reliable operation of pumping units is continuous monitoring, analysis of technical condition and timely troubleshooting. Development of modern and perfect ways to determine the technical status of pumping units to prevent the occurrence of malfunctions. This article presents the results of experimental research carried out in the laboratory on the basis of scientific work. Using the recommended diagnostic system makes it possible to assess the technical condition, improve performance and reduce the cost of repairing pumping units

HYDRO CHEMICAL CRUSHING AND CORROSION OF METAL CONCREATE CONSTRUCTIONS OF BIG PUMPING STATIONS

This article is devoted to one of the main problems of the process of hydrochemical destruction of massive reinforced concrete structures, corrosion of reinforcement in the foundation parts of buildings of large pumping stations. Based on the analysis of the conducted studies, it was found out the increased content of sulfuric acid salts and other chemical elements in groundwater, which promote the formation of calcium sulfoaluminate (cement bacillus) in the structure of reinforced concrete structures. The analysis of the conducted researches allows to draw a conclusion that the main factors that influence and intensify this process are: aggressive action of groundwater and filtration water, as well as constant influence of electric current. All these factors, contributing to the development of corrosion processes of reinforced concrete structures, lead to a significant decrease in strength properties, and in some cases, their partial destruction. In this connection, there is now an urgent need for a detailed study of the processes under consideration and the development of necessary measures to prevent and eliminate them

Принцип достоверной эквивалентности в задачах адаптивного управления в условиях априорной неопределенности

In article systems with control which function in the conditions of aprioristic uncertainty with unknown parameters are considered. On objects of control revolting influences with unknown functions of distribution of probability the mathematical description which it is set by means of inequalities operate. Therefore automatic control system engineering by these objects it is necessary to carry out on the basis of the theory of adaptive systems. Problems of adaptive control solve now on the basis of a principle of authentic equivalence. В статье рассматриваются системы с управлением, которые функционируют в условиях априорной неопределенности с неизвестными параметрами. На объекты управления действуют возмущающие воздействия с неизвестными функциями распределения вероятности математическое описание, которое задается с помощью неравенств. Поэтому разработку систем автоматического управления этими объектами необходимо осуществлять на основе теории адантивных систем. Задачи адаптивного управления в настоящее время рещают на базе принципа достоверной эквивалентности

THE PROGRAM FOR CALCULATING THE DISTRIBUTION OF THE FLUX DENSITY OF CONCENTRATED SOLAR RADIATION IN THE FOCAL PLANE OF A PARABOLIC CYLINDER CONCENTRATOR

A computer program for calculating the distribution of solar radiation flux density in the focal plane of a parabolocylindric concentrator is analyzed

Принцип достоверной эквивалентности в задачах адаптивного управления в условиях априорной неопределенности

In article systems with control which function in the conditions of aprioristic uncertainty with unknown parameters are considered. On objects of control revolting influences with unknown functions of distribution of probability the mathematical description which it is set by means of inequalities operate. Therefore automatic control system engineering by these objects it is necessary to carry out on the basis of the theory of adaptive systems. Problems of adaptive control solve now on the basis of a principle of authentic equivalence. В статье рассматриваются системы с управлением, которые функционируют в условиях априорной неопределенности с неизвестными параметрами. На объекты управления действуют возмущающие воздействия с неизвестными функциями распределения вероятности математическое описание, которое задается с помощью неравенств. Поэтому разработку систем автоматического управления этими объектами необходимо осуществлять на основе теории адантивных систем. Задачи адаптивного управления в настоящее время рещают на базе принципа достоверной эквивалентности