This paper focuses on the interconnections between the variants of assembling the elements of spacecraft control systems within the considered alternative graphic formalization approach. Under these circumstances, the assembly variants of the system elements or their sets are depicted as peaks of an alternative graph, with arcs representing interconnections. The aggregation decomposition method in the analysis and synthesis of the structure of complex systems includes two interrelated stages: sequential decomposition of objectives, functions, tasks, etc., performed by the system, and their aggregation at appropriate detail levels.

The article reviews the history of acoustics and the history of the use of its methods and achievements in mechanical engineering. Acoustic monitoring methods justly hold a significant place among the methods for studying physical objects and industrial processes. These methods are mainly intended for detecting various defects (ultrasound control), monitoring parameters of industrial processes, and determining physical and mechanical properties of products as well as their geometric characteristics. The distinctive feature of the acoustic methods, which helped their spread, is the possibility for non-destructive testing, i. e. causing no damage to the object under study. Another, no less important merit of these methods is a possibility for testing without disrupting industrial processes.

The article reviews the history of acoustics and the history of the use of its methods and achievements in mechanical engineering. Acoustic monitoring methods justly hold a significant place among the methods for studying physical objects and industrial processes. These methods are mainly intended for detecting various defects (ultrasound control), monitoring parameters of industrial processes, and determining physical and mechanical properties of products as well as their geometric characteristics. The distinctive feature of the acoustic methods, which helped their spread, is the possibility for non-destructive testing, i. e. causing no damage to the object under study. Another, no less important merit of these methods is a possibility for testing without disrupting industrial processes.

In this work, tests of low-speed compressor stages with a linear magnetoelectric drive are carried out. The developed system makes it possible to measure the instantaneous parameters of the compressed gas in the working chamber of the piston stage, as well as to take the operating characteristics of the drive — consumed current, voltage, power. The work presents examples of the obtained characteristics. In the future, the use of the measuring system is assumed in scientific research on the study of effective modes of operation of the magnetoelectric drive and as a teaching and laboratory stand in the implementation of the educational process