A helicopter blade during its rotation accomplishes complex spatial movement and deformation. This report is devoted to the blade deformation measuring system (BDMS) which 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. A brief description of the system design is given. The results of the laboratory investigations of system features are discussed as well. This system was tested during experimental investigations of blade deformations of the real upper rotor of a 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 confirmed the serviceability of the system and have shown the opportunity for twist deformation measurements of the blade with a root-mean-square error lower 3-6 angular minutes and bend deformation measurements with an error of 0.3-0.6 mm. The technique of calibration of the blade deformation measurement system and appropriate software had been developed and tested.
Videogrammetric system for studying movement and deformation of real-scaled helicopter rotor blades
1999
14 Seiten, 6 Quellen
Aufsatz (Konferenz)
Englisch
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