Construction, modeling and experiment of a resonant-type piezoelectric impact motor based on inertial drive mechanism

Piezoelectric impact motor (PIM) with high power driving capability has attracted extensive attention. This paper presents a new resonant-type PIM based on inertial drive mechanism. Architecture construction, dynamic modeling, and prototype experiment of the proposed motor are conducted. With sinusoidal driving voltages of 24 Vp-p at 435 Hz and 18 Vp-p at 870 Hz in the resonant mode, the prototype motor achieves an average no-load velocity of 26.1 mm s−1, a stalling drag force of 350 mN, and a power output capacity of 2.55 mW, while it also provides a stable step displacement of 0.67 μm with saw-tooth wave driving voltage of 20 Vp-p, 10 Hz in the stepping mode. Experiment results are consistent with the theoretical analysis, which confirms an effective approach to guide the structure design and further optimization for resonant-type PIMs.