In future, the greening of air transport will demand wider rotor rpm ranges in order to optimize for both low external noise levels and high fuel efficiency. In order to adapt to these rpm variations, the spread of active systems will further increase and substitute more and more passive systems with fixed frequency tuning. Recent advances in Eurocopters activities on the cabin active vibration control (AVC) system have been presented in this paper. An overview of the complete system design is given as well as an evaluation of the most important results achieved during several flight tests on different light and medium rotorcrafts. During all flight tests on different sized platforms the AVC system showed superior performance, due to its capability of frequency and amplitude adaptation. In general, the AVC system yields in very low vibration levels, compared to current passive or semi-active absorbers, in several level flight conditions including RPM changes, turns and flares. This proves that AVC exhibits the genuine ability to manage cabin vibrations in the demanding future. Summarized, the AVC system is a highly efficient, weight optimized and cost competitive system that is able to reduce significantly the rotor-induced vibration levels and ensures Eurocopter target to achieve the long-envisaged jet-smooth ride comfort.
Active cabin vibration reduction for jet-smooth helicopter ride
2009
8 Seiten, 15 Bilder, 6 Quellen
Conference paper
Storage medium
English
Active Cabin Vibration Control for Jet-Smooth Helicopter Ride
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