Аналiз вiдмов газоперекачувальних агрегатiв (ГПА), встановлених на трансконтинентальному газопроводi «Уренгой-Помари-Ужгород» показав, що вiдмови систем автоматичного управлiння (САУ) ГПА займають друге мiсце (до 40 %) вiд загальної кiлькiстю вiдмов. Показано, що вiдомi методи контролю технiчного стану механiчної частини ГПА не можуть бути використанi для контролю працездатностi САУ i елементiв автоматики ГПА. Серед вiдомих методiв контролю працездатностi САУ ГПА, як динамiчної системи, найбiльш перспективними є методи, що базуються на аналiзi її перехiдного процесу (розгiнної характеристики) при деякому типовому вхiдному впливi. Приведене теоретичне обґрунтування розробленого методу контролю працездатностi САУ ГПА, дiагностичною ознакою якого є значення площ розгiнних характеристик. Структура передавальної функцiї та її параметри визначалися методом площ (метод Симою). Для реалiзацiї методу у середовищi MatLab розроблено програмне забезпечення, яке дає змогу визначити параметри функцiї передачi за експериментальною кривою пуску ГПА та величину площi, яка обмежена його перехiдною функцiєю. Наводиться методика проведення експериментальних дослiджень запропонованого методу контролю працездатностi САУ ГПА на прикладi ГТК-25i, яка дозволила отримати дев'ять розгiнних характеристик ГПА в координатах «час-частота обертання ротора ТВТ» та результати їх обробки. Подальша реалiзацiя запропонованого методу вимагає визначення умов його працездатностi та паралельного контролю технiчного стану механiчних вузлiв ГПА з метою виключення їх впливу на результат контролю стану САУ ГПА Ключевi слова: газоперекачувальний агрегат, система автоматичного управлiння, розгiнна характеристика, технiчний стан
Object of research: degradation processes occurring in the blades of a gas-pumping unit (GPU) during its long-term operation and cause the appearance of defects that lead to a change in their technical condition and breakage of the working blades and, as a result, to accidents. Solved problem: obtaining a method for diagnosing the GPU blades, which can be used to determine its technical condition during the GPU operation. The main scientific results: a classification of methods for diagnosing the GPU blades and their analysis was developed, according to the results of which it was established that the improvement of a new method of aerodynamic calculation of profiles relative to the GPU blades by developing mathematical models of the deformation process and flow around the GPU blades and calculation formulas for assessing their aerodynamic characteristics, will allow to simulate possible options for changing the technical state of the blades (the amount of wear of the blades, their number, deformation, etc.), to study their influence on the parameters of the oscillatory processes of the blades and to compile a dictionary (base) of diagnostic signs of their state. The use of such a base will make it possible to quickly determine the technical condition of the blades during the GPU operation and prevent the occurrence of emergency situations The area of practical use of the research results: the enterprises of the gas transmission system, which operate GPU with a gas turbine drive An innovative technological product: a method of direct aerodynamic calculation of airfoils relative to GPU blades to determine their technical condition during operation. Scope of application of the innovative technological product: gas-pumping units with a gas turbine drive with a capacity of 6.3 MW to 25.0 MW
Insufficient and untimely forecasting of the level of floods, floods and mudslides, as well as the lack of a modern, full and integrated protection complex lead to annual losses in the agricultural, industrial and social sectors of the economy, as well as human casualties. (30 people in 2008 in Ukraine). The floods of 1969, 1974, 1980, 2000, 2008, 2019, and 2020 were the most negative. At the same time, the flooding of the territories that took place in the Ivano-Frankivsk region in 2000-2008 caused damage to the facilities and the population of the region in the total amount of more than 5.2 billion hryvnias. Despite a number of existing systems for monitoring and forecasting the level of flood waters, such as "TISA", "Prykarpattya", "AXON", etc., they have not found wide practical application due to low efficiency, high cost and disregard. -management of water-physical properties of soils. In this regard, the task of developing systems for monitoring and forecasting the level of flood waters in order to prevent or reduce possible losses in the agricultural, industrial and social sectors of the economy from their negative consequences remains relevant.
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