A generalized diagram of an acoustic emission diagnostic system is presented and a set of programs for its design is proposed. The propagation of an acoustic wave simulation is carried out by COMSOL Multiphysics in plane case under various conditions and the coincidence of the results with the COSMOS / M modelling system results is shown.

This paper discusses the formalized representation of a mechanical subsystem of a robotic manipulator as a component circuit with vector links for the purposes of dynamics problems. Set-theoretical definition of a component circuit is represented. A matrix-topological interpretation of the components of solid body and kinematic node is discussed. Component models can be used for mechanical systems modeling and simulation systems software develipment.

Digital learning technologies, virtual laboratories, training models and applications are all essential directions for development of engineering education. This paper discusses the theoretical basis and applications of the Russia-developed MARS automated simulation environment in teaching as a component of digital educational products – electronic study guides, virtual and real-virtual laboratories, training illustration modules. Key sections of component model library in MARS are represented. The examples of training illustration modules are discussed. Applying of MARS in learning ensures efficiency of the educational process, as it makes it possible to better organize self-study activities, boosts knowledge acquisition, and makes theoretical study more instructive and accessible.

The paper discusses the methods for harmonic current formation in DC to AC converters. The authors propose a timepulse method for control of switches in a half-bridge inverter for formation of the harmonic load current in a wide range of amplitude and output current frequency adjustment.

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