Videogrammetric System for Measurements of Movement and Deformation of Real-Scaled Helicopter Rotor Blades
by
Vladimir P. Koulesh
Central Aero-Hydrodynamic Institute, Zhukovsky, 140160 Russia
Coauthors: S. Bosnyakov, A. Morozov, N. Tarasov, S. Fonov

Helicopter's blade during its rotation acomplishes a complex spatial movement and deformation. This Blade Deformation Measuring System (BDMS) was developed to measure parameters of the real-scaled blade movement and its bending-twisting deformation. This system operates under videogrammetry principles. The basic principles of registration of video-images and processing of results of measurements are stated. Brief description of the system design is given.

This system was tested during experimental investigations of blade deformations of the real upper rotor of Kamov-26 helicopter with radius 6.5 m on the VP-5 rotor test facility in TsAGI's T-101 wind tunnel. The tests have shown opportunity of twist deformation measurements of the blade with a root-mean-square error lower than 3-6 angular minutes and bend deformations measurements with an error of 0.3-0.6 mm. The technique of calibration of Blade Deformation Measurement System and appropriate software had been developed and tested.

Date received: February 12, 1999

Copyright © 1999 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cacp-46.