In recent years, ZF Luftfahrttechnik (ZFL) has continuously pursued the application of Individual Blade Control (IBC). Considerable experience has been accumulated in the fields of hardware design, wind tunnel and flight testing as well as in different theoretical prediction methods. In the framework of several national and international cooperation programs, ZFL is the primary hardware designer and manufacturer of complete IBC systems. This paper highlights some past and future ZFL activities in the field of IBC. Wind tunnel test results gained in the field of rotor power reduction have been reevaluated in order to ease the transfer of wind tunnel test results to corresponding free flight cases. Test data are also evaluated with respect to the physically required actuation power which typically only amounts to a small fraction of the installed hydraulic power. Different results in the field of vibration reduction are compared and amplitude and frequency requirements are derived. Moreover, a morphologic scheme that summarizes the data in a highly condensed form is presented. Some straightforward analytical relations are formulated which can help transfer the results to different rotor types. Finally, some recent hardware and flight test related activities are reviewed such as dynamic and kinematic control system modeling.
Theoretical and experimental prediction of individual blade control benefits
Theoretische und experimentelle Vorhersage der Vorteile einer Einzelblattverstellung
1997
12 Seiten, 15 Bilder, 12 Quellen
Aufsatz (Konferenz)
Englisch
Theoretical and Experimental Prediction of Individual Blade Control Benefits
British Library Conference Proceedings | 1997
|Vibration and Noise Reduction Through Individual Blade Control Experimental and Theoretical Results
British Library Conference Proceedings | 1998
|Individual Blade Control Effects on Blade-Vortex Interaction Noise
British Library Conference Proceedings | 1994
|Individual blade control effects on blade-vortex interaction noise
Tema Archiv | 1994
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