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Blade Flapping Measurement System for Small Scale Rotorcraft

Etienne Perron, Universite de Sherbrooke
Charles Ratelle, Laflamme Aero Inc.
Ludwik Sobiesiak, NGC Aerospace Ltd.
David Rancourt, Université de Sherbrooke

May 10, 2021

https://doi.org/10.4050/F-0077-2021-16873

Abstract:
Flight data are often required to improve rotorcraft dynamic inflow models, especially for multi-rotor configurations. However, traditional full-scale wind-tunnel experiments are not suitable for hundred-pound-sized rotorcraft. Therefore, methods to capture flapping motion directly in flight are a good substitute. The teetering blade angle is measured using a hall effect sensor, and another hall effect is used to synchronize its azimuth. This work presents a design and prototype of an acquisition system and demonstrates its functionality on a rotor mock-up. Post-processing takes the raw flapping angle measured in the rotating frame and estimates the rotor tip path plane angles in the non-rotating frame. The results show the acquisition capacities to sense flapping motion and synchronize its data to UTC under one millisecond of error. Therefore, data can be matched to airframe inertial and navigation data or another acquisition system. Data generated can be used to validate/calibrate trim models and dynamic inflow models.


Blade Flapping Measurement System for Small Scale Rotorcraft

  • Presented at Forum 77
  • 7 pages
  • SKU # : F-0077-2021-16873
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Blade Flapping Measurement System for Small Scale Rotorcraft

Authors / Details:
Etienne Perron, Universite de Sherbrooke
Charles Ratelle, Laflamme Aero Inc.
Ludwik Sobiesiak, NGC Aerospace Ltd.
David Rancourt, Université de Sherbrooke