Vibration refinement of a power plant with a small piston single-cylinder engine

Аuthors

Morozov V. A.^*, Makaryants G. M., Bulatov A. A.^**, Smelov V. G.^***

Samara National Research University, Moskovskoe shosse, 34, Samara, Russia

*e-mail: morozov.va@ssau.ru
**e-mail: bulatov.aa@ssau.ru
***e-mail: smelov@ssau.ru

Abstract

The paper considers the issue of eliminating failures of a small-sized aircraft piston single-cylinder engine that occur due to high dynamic loads during its refinement. The finishing work was carried out sequentially on the ground stand, when the engine was mounted on a metal frame, and during the ground race, when it was installed on an aircraft – a flying laboratory. Bench tests allowed us to analyze the reliability of the power plant (PP) components. It was revealed that the most unreliable element is the engine frame, the attachment point of the engine to the aircraft. The main reason for the overwhelming number of failures is vibration load. During the finishing measures at the stand, the failure time of the first prototype power plant was increased from 1.3 hours to 5.6 hours. Tests of the internal combustion engine (ICE) installed on the flying laboratory made it possible to evaluate the vibration transmitted to the aircraft flight controller, which made it possible to choose a rational way to mount the engine on the unmanned aerial vehicle (UAV). It has been shown that in order to increase the reliability and maintain the operability of a single-cylinder piston engine power plant, as well as aircraft systems, the engine must be placed on an anti-vibration engine frame using a cylinder-down orientation.

Keywords:

vibration; small piston engine; internal combustion engine; internal combustion engine; power plant; PP; unmanned aircraft system; UAS, unmanned aircraft; UAV; flying laboratory; testing; vibration refinement

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