A study on resonance frequency of the longitudinal torsional ultrasonic motor

Aim To study resonance frequencies of longitudinaltorsional ultrasonic motor.Methods Put forward the concept of load factor for the first time based on the one dimensional respective frequency equations of the longitudinal-torsional ultrasonic motor.Results The change relations between resonance frequencies and load of longitudinal-torsional ultrasonic motor were got.Experiments show that the measured resonance frequencies are in good agreement with the computed results.Conclusion The oretical foundation is provided for designing longitudinal-torsional ultrasonic motor.