An Acoustic Levitation Gyroscope Driven by Near-field Ultrasonic Energy

Based on the piezoelectric drive principle and near-field acoustic levitation(NFAL) technology, a noncontact gyroscope driven by ultrasonic energy is proposed in this paper. The ultrasonic energy generated by a piezoelectric actuator is used in this driving method to provide levitation and rotation-driving force for the gyroscope rotor. The performance parameters of the piezoelectric actuator are predicted based on finite element analysis method. A levitation gyroscope driving test experiment system is built to obtain the levitation mechanics parameters and drive parameters of the levitation gyroscope. The results of levitation and driving experiments show that the gyroscope rotor successfully realizes noncontact rotation at a certain levitation height, which verifies the feasibility of the drive method. The study on acoustic suspended gyroscope and its performance provides an innovative approach to noncontact actuation.