Investigation of the influence of generator power lines on the engine control system of an unmanned aerial vehicle based on computer simulation

Аuthors

Gaynutdinov R. R.^*, Chermoshentsev S. F.^**

Kazan National Research Technical University named after A.N. Tupolev, Kazan, Russia

*e-mail: emc-kai@mail.ru
**e-mail: sapr@kai.ru

Abstract

In this paper, studies of intra-system electromagnetic interactions in the emission of electromagnetic interference caused by radiation from the power lines of the generator are carried out. An approach based on electrodynamic modeling to predict the emission of electromagnetic interference and circuit modeling to assess the levels of electromagnetic interference in information communication lines under the influence of generator power lines is proposed. A practical example of predicting the electromagnetic situation in the internal space of the engine nacelle of an unmanned aerial vehicle made of composite material during the emission of electromagnetic interference from the generator power lines and the effect of these interference on the engine control system through information communication lines located in the internal space of the engine nacelle is considered. The results of the study show that electromagnetic interference (maximum values) in the communication lines of the engine control system reach levels up to 13.6 V, and the frequency of electromagnetic interference oscillations is 400 Hz. These levels of electromagnetic interference can lead to a violation of the quality of the engine control system. Comparison of the maximum level of magnetic field strength (110 A/m) with the requirements for on-board equipment in accordance with the regulatory document KT-160D (clause 19.3.3) shows that on-board equipment that meets the requirements of "class CC" will be able to function properly in the electromagnetic environment of the aircraft nacelle with emissions from the generator power communication lines. The method of forecasting the electromagnetic environment caused by electromagnetic fields from the aircraft power supply system can be an integral part of the methods for designing the aircraft power supply system and for tracing communication lines taking into account EMC requirements. High currents from the generator make the aircraft power supply network a source of a low-frequency magnetic field, which is radiated by the circuits formed by the conductors of the power supply system. An important step in reducing low-frequency magnetic fields is to reduce the areas of current circuits by rationally organizing the grounding system and equalizing the reference potential.

Keywords:

computer modeling, electromagnetic compatibility, electromagnetic interference, aircraft, composite fuselage

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