Focused on the disability of the micro-displacement mechanism driven by sine wave-a kind of symmetrical wave based on the principle of the converse piezoelectric effect

using sine wave to drive the piezoelectric cantilever bimorphs is proposed. Micro-displacement is realized driven by the inertial impact force. The mathematical model of the mechanism movement is constructed. The mechanism with bevel is designed. Vertical force to the mechanism is produced by the periodical inertial force

which changes the friction by changing vertical pressure. The moving condition QU<QD<FX is deduced. The velocity characteristics under different frequencies and voltages are tested. The results show that micro-displacement mechanism realizes stable and forward direction movement. When the voltage is fixed and the frequency is between 30Hz～38Hz

its velocity increases as the frequency increases. When the frequency is fixed

its velocity increases as the voltage increases. The average step is up to 2μm and the velocity is up to 1mm/s when the mechanism is actuated by the 35Hz、90V sine wave.