Technical Test Center Belgrade

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Technical Test Center Belgrade

Test, Serbia
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Ilic Z.,Technical Test Center Belgrade | Rasuo B.,University of Belgrade | Jovanovic M.,Technical Test Center Belgrade | Jovicic S.,Technical Test Center Belgrade
29th Congress of the International Council of the Aeronautical Sciences, ICAS 2014 | Year: 2014

Knowledge about the vibration sources on an aircraft is an important prerequisite for modelling adequate response/isolation of initially discovered vibration. The following paper shows results and analysis from changes in low-frequency vibration spectrum located in the engine of Serbia's Lasta aircraft (Figure 1). Due to different working states and various conditions of engine, changing of vibrations is transmitted from the engine to pilot seat, as a consequence of changing quality composition of air/fuel mixture, while testing on a flying aircraft equipped, with piston propelled propulsion group. Test-measure systems used for researches in vibration dynamics characteristics are shown. Values of vibrations are shown in relation to changes of engine working parameters. Research results show that knowledge of engine vibrations gives wide options for an evaluation of response from piston propeller propulsion group on impact from changing quality composition of air/fuel mixture in the engine leaning process.


Ilic Z.,Technical Test Center Belgrade | Rasuo R.,University of Belgrade | Jovanovic M.,Technical Test Center Belgrade | Jankovic D.,Aeronautical Plant Moma Stanojlovic
FME Transactions | Year: 2013

Knowledge about the source of vibrations on a plane is an important prerequisite for modelling adequate response/isolation of initially discovered vibration. The following paper shows results and analysis from changes in low-frequency vibration spectrum located in the engine of Lasta airplane. Due to different working states and various conditions of engine, changing of vibrations is transmitted from the engine to pilot seat, as a consequence of changing quality composition of air/fuel mixture, while testing on a flying plane equipped, with piston propelled propulsion group. Test-measure systems used for researches in vibration dynamics characteristics are shown. Values of vibrations are shown in relation to engine working parameters changes. Research results show that knowledge of engine vibrations gives a wide options for an evaluation of response from piston propeller propulsion group on impact from changing quality composition of air/fuel mixture in the engine leaning process. © Faculty of Mechanical Engineering, Belgrade.

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