Abstract
For a novel inertial piezoelectric rotary motor, the equation of the voltage response on the piezo-ceramic bimorph under the excitation signals is deduced and the dynamic equation of the motor rotor is given. Using the equations, the voltage responses on the piezo-ceramic bimorph and the responses of the displacement, velocity and acceleration on the rotor to the sawtooth voltage excitation are investigated. The results show that when the frequency of the excitation signal is quite low, the waveform of the displacement response of the rotor is identical to one of the excitation signal; the outer diameter of the rotor, its length and thickness, etc., have obvious effects on the inertial moment applied to the rotor. The results are useful for design and control of the operating performance of the motor.
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