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This paper introduces a longitudinal-torsional USM. Based on the electrical characteristics of the piezoelectric vibrator, a theoretical model was investigated. It can be used to derive the transient response characteristics of electrical parameters. The finite element analysis was also used to verify the correctness of the parameters change trend. The transient state of the analyzed parameters includes...
This paper reported an ultrasonic motor using the 1st longitudinal and the 2nd torsional (L-T) modes. The stator slots were useful to tune the resonance frequencies and increased L-T displacements largely. By cutting slots, which determined the number of oscillators, the whole stator was changed into independent vibrators. The more independent vibrators, the bigger power it outputs. The stator possessing...
A novel Ultrasonic/sonic Driller/Corer (USDC) has been developed for deep space exploration. This low axial load is required and few impact forces are produced for the USDC to sample rocks, which results in the important advantage of low energy dissipation. Based on inverse piezoelectric effect, the ultrasonic vibration is induced for the transducer of the USDC. The ultrasonic/sonic vibration energy...
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