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A novel approach to the simulation of self-oscillations by the finite-element method is proposed in this paper. It is based on studies of self-oscillations during machining. It allows to study different-scale dynamic phenomena using a model made with small amount of computing resources. The results are consistent with the results of full-scale experiments, analytical calculations and modeling.

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The following research focuses on finding the way to increase the heat sink of voice communication control system. The key feature of these systems is the combination of high heat dissipation and passive heatsink of telecommunication terminals. The research was performed using finite element method. The construction was changed, these changes prevented decrease of temperature of the electronic components. That helped to extend the service life of the equipment. The full-scale experiment was carried out. This experiment confirmed the correctness of the results obtained.