do ultrasonic motors have applications in aerospace vehicles if yes how?

Question

mars lander vehicles

Answer 1

Yes, since they are small and lightweight. They are being developed as actuators for miniature spacecraft instruments and subsystems, according to the reference. They run on an interesting principle: a ring of piezoelectric material, the stator, is excited electrically to produce a traveling wave of deformation. Points on the ring move in tiny elliptical orbits. The rotor is a rigid ring in frictional contact with the stator. The small stator motions produce rotor rotation.