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ABSTRACT: Environmental and fire risks together with high maintenance costs are the main drivers in recent years to replace hydraulic actuators in aircrafts by electromechanical actuators. Unluckily, a solution based on electromagnetic motors with reduction gears results in increased weight and electrical peak power of the drive train for typical brake requirements. A promising actuator candidate with high torque and low inertia for airborne applications is the multi-mass ultrasonic motor (MM-USM) derived from the well known travelling-wave type motor (TW-USM). This contribution focuses on the modelling of the MM-USM and proposes a control concept for this motor as drive component of a novel airborne brake actuator: after outlining the operational principle of the motor, a mechanical model is presented, which incorporates sliding and sticking operations of the friction contact. A first validation of the motor model via FEA calculations is supplementing this paper
IEEE Industrial Electronics, IECON 2006 - 32nd Annual Conference on; 12/2006
