The performance of a helicopter mainly depends on the design of the main rotor. They have to endure strong centrifugal and bending forces and should be able to transmit these loads to the rotor hub and therefore to the airframe. To design rotor blades which could fulfil these requirements, the loads occurring under flight conditions and the resultant behaviour of the rotor blades (flapping, lead-lag bending and twisting motion) have to be known. The in-flight investigation of the deformation of the fast spinning rotor is a demanding task. It is evident, that conventional methods such as strain gauges and accelerometers are difficult to use because of problems with their installation, wiring, the data transmission, and the balancing of the rotor. Additionally, such sensors provide data only at the location where they have been installed. Consequently, a non-intrusive and planar measurement of the rotor blade deformation in flight is of high interest. This need for advanced, non-intrusive e.g. optical measurement techniques has been identified. Within the EC funded specific targeted research project AIM Advanced In-flight Measurement Techniques DLR and Eurocopter are applying the Quantitative Video Technique (QVT) together with the Image Pattern Correlation Technique (IPCT) to obtain the in-flight deformation of the main rotor blades of an EC-135. These advanced measurement techniques deliver 3D shape and deformation results by using stereoscopic camera pictures of the investigated objects, in this case, the EC-135 main rotor blades. To check the usability of the QVT and the accuracy of the IPCT for industrial in-flight measurements, a test with an instrumented rotor blade has been performed. The present paper will give a short introduction to the challenging task and some basics of the used measurement techniques. The measuring system will be described and the performed tests will be presented. To conclude, some example results and a short outlook concerning future activities will be given.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Advanced optical rotor blade deformation measurements on a flying helicopter


    Beteiligte:
    Boden, Fritz (Autor:in) / Torres, Anwar (Autor:in) / Maucher, Christoph (Autor:in)


    Erscheinungsdatum :

    2009


    Format / Umfang :

    10 Seiten, 22 Bilder, 7 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




    Advanced Optical Rotor Blade Deformation Measurements on a Flying Helicopter

    Boden, F. / Torres, A. / Maucher, C. | British Library Conference Proceedings | 2009


    Blade Deformation Measurements with IPCT on an EC 135 Helicopter Rotor

    Maucher, Christoph / Boden, Fritz | Springer Verlag | 2013


    HELICOPTER ROTOR BLADE

    NEKRASOV VLADIMIR IVANOVICH | Europäisches Patentamt | 2016

    Freier Zugriff

    Helicopter rotor blade

    WANG HUILING / CAI MENG / TIAN SHUQUAN et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    HELICOPTER ROTOR BLADE

    EREMIN MIKHAIL MIKHAJLOVICH / BORISOV EVGENIJ ALEKSANDROVICH | Europäisches Patentamt | 2018

    Freier Zugriff