Transactions of Nanjing University of Aeronautics & Astronautics
Experiment on a Double-Foot Stepping Piezoelectric Linear Motor
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Abstract:
A novel double-foot piezoelectric linear motor is proposed. The kinematic model of the motor under stepping motion is presented. The motor mainly consists of a stator with four piezoelectric stacks, a mover, a holding mechanism, and a preloading mechanism to achieve large stroke with high resolution. Finite element simulations are carried out to analyze the motion characteristics of the motor. A prototype is fabricated and a serial experiments are conducted to validate the feasibility of the motor principle. Experimental results indicate that the motor can move at a speed of 670.22 μm/s with a driving frequency of 120 Hz and a voltage of 120 V. The resolution of the proposed motor is 3.6 μm while the resolution of the single-step motion is 0.1 μm.
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