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    • Second-Order Model for Rotary Traveling Wave Ultrasonic Motors 

      Garcia-Rochin R; Kühne M; Santiesteban-Cos R; Rubio-Astorga GJ; Peer A (IEEE, 2015)
      Ultrasonic motors are compact actuators with high precision and high stall torque. They feature a friction-based actuation principle and offer an alternative to standard actuators such as direct current motors. However, ...