Ponomarov O. Vibroacoustic diagnostics of elements of automation of pneumohydraulic supply system of rocket engines

In the dissertation work, an important scientific and applied problem was solved, dedicated to the creation of new methods of control and diagnostics of automation elements of pneumohydraulic supply system of rocket engines. The work is aimed at improving the reliability indicators of aviation and rocket and space technology. The concept of an experimental technique for solving applied problems of monitoring and diagnostics is presented, namely, for determining the initial technical state of the automation elements of pneumohydraulic supply systems for launch vehicles. The analysis of failures of the automation elements existing in modern rocket technology is carried out, experimental studies are carried out using physical modeling of failures, the results of the development of the method of vibroacoustic diagnostics are presented. With experimental test, the possibility of using vibroacoustic diagnostics for testing automation elements of rocket engines pneumohydraulic supply system has been proved. Diagnostic models, constructed functional models, certain diagnostic features and functional dependencies of the monitored parameters, depending on the output technical state, have been developed. The physical and mathematical models of the initial technical state of the objects of diagnostics have been determined, their adequacy has been proved by numerical modeling. An information technology has been developed for controlling automation elements in a test cycle as part of an assembled product, which can significantly increase operational reliability, guidelines for practical use have been proposed, and possible stages of the life cycle have been identified.