Traditionally, rotorcraft blade control is accomplished through a swashplate mechanism. The swashplate mechanism is limited in that it does not allow for independent control of rotor blades. Research efforts have shown that the ability to control rotor blade pitch independently, or Individual Blade Control (IBC), can offer advantages over conventional swashplate-based control. Previous implementations of IBC mechanisms have placed individual actuators in the rotating frame, one for each rotor blade. This requires the use of slipring mechanisms which add to system complexity and reduce system reliability. Wolfs IBC mechanism utilizes actuators in the stationary frame, like traditional helicopters. This mechanism is designed to reliably transfer motion from the stationary frame actuators to the blades in the rotary frame through proven power transmission mechanisms.
Benefit: Development of a highly reliable power transmission mechanism will enable integration of Independent Blade Control (IBC) into future rotorcraft systems. Current designs for IBC implementation add additional complexity and unproven parts into the rotor blade control system which decreases reliability. By utilizing similar, proven mechanical mechanisms, Individual Blade Control (IBC) can successfully be implemented into future rotorcraft while maintaining similar system reliability to conventional designs. Research shows that implementation of IBC can offer benefits including increased performance, improved handling qualities, extended component life, improved ride quality, reduced noise, and more. These performance advantages can be realized in both conventional rotorcraft markets as well as the fast-growing electric vertical takeoff and landing (eVTOL) aircraft market.
Keywords: Rotorcraft, Rotorcraft, Higher Harmonic Control, Individual Blade Control, Fault Tolerant Flight Control, Future Vertical Lift, Swashplate
