Eventos Anais de eventos
CONEM 2022
XI Congresso Nacional de Engenharia Mecânica - CONEM 2022
DEVELOPMENT OF A DIDACTIC SCALED TWO-BLADED HELICOPTER PROTOTYPE TO STUDY THE DYNAMIC OF VIBRATION
Submission Author:
Andersson Oliveira , PB , Brazil
Co-Authors:
Andersson Oliveira, Antonio Almeida Silva, MARCELO CAVALCANTI RODRIGUES
Presenter: Andersson Oliveira
doi://10.26678/ABCM.CONEM2022.CON22-0102
Abstract
Vibration in helicopters is a concern of manufacturers and users which can be expanded for drones and any rotating blades aircraft. The vibrations measurements represent a challenge in terms of dynamic characterization. The vibration suppression also represents technological challenges, mainly when acting in rotating parts. The literature reports the expected dynamic behavior of helicopters and highlights the challenges in vibrating suppression. To study the dynamic behavior of a helicopter rotor, that aims to study solutions to mitigate the effects of its vibrations in rotating parts, in this research is presented the design, building, and testing of a two-bladed rotor prototype using a low-cost indoor apparatus that simulates a helicopter in hover flight. The prototype relies on a helimodel rotor adapted employing blades produced by additive manufacturing. The control and measurements systems adopt a low-cost microcircuit accelerometer from the ADXL series and the Labview Platform, used as a measurement and control system that compounds a didactic structure to study the dynamic of this rotating system. The physical interface with the prototype is an acquisition USB board from National Instruments. The study identified the modal frequencies of rotating parts and identified the relationship between main frequencies and mechanical parts. In addition, performs the mechanism which shifts the pitch angle of the blades. The experimental results are aligned with the expected behavior registered by the literature, so that expands the possibilities to build an indoor low-scaled prototype, useful to experimental research in rotating dynamics and, in particular, to rotating blades aircraft like helicopters and drones.
Keywords
mechanical vibrations, Helicopter Dynamics, rotating systems, Instrumentation & control
