A mathematical model of a helicopter rotor track and balance is used in order to study optimal balancing and tracking, and their relationship. The present numerical investigation will be concentrated on a typical four-bladed rotor. The correction parameters that are used in order to minimize the influence of the natural (unintentional) non-uniformity will be presented. It is shown that perfect tracking does not necessarily lead to optimal balancing. Furthermore, cases of perfect tracking, may be accompanied by relatively high vibrations. Tracking or balancing at a certain air speed may also be accompanied by relatively large vibrational loads at other air speed. Thus it is recommended to perform simultaneous balancing at different air speeds. The present investigation shows how the new model can be used for optimal balancing of helicopter rotors.
Mathematical modelling of a helicopter rotor track and balance: Results
Journal of Sound and Vibration ; 200 , 5 ; 605-620
1997
16 Seiten, 8 Bilder, 3 Tabellen, 2 Quellen
Aufsatz (Zeitschrift)
Englisch
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