雙碟式壓電致動器之研究

Abstract

本研究提出一創新的壓電致動器，此致動器擁有大的變形量與快速移動的特性，在慣性力與摩擦力的互相搭配下，此致動器可以快速移動。壓電致動器在此20mm的實驗中，共使用兩種驅動方式來進行實驗測試，一種是對兩片壓電蜂鳴片使用同向電壓的驅動模式，在此稱為A-type，另一種是對兩壓電蜂鳴片使用反向電壓的驅動模式，在此稱為B-type，壓電致動器在此實驗項目中，受到占空比與速度的影響，以及電壓與推力的影響。當占空比在40%與60%時，A-type移動速度最快。從速度與推力的實驗結果來看，A-type壓電致動器擁有比較大的變形模式，因此可以產生較大的位移速度與推力，所以A-type的整體表現相較於B-type好。

This study proposes an innovative piezoelectric actuator. It has characteristics of large deformation and fast velocity. Under the inertial force and friction influence, the piezoelectric actuator can move rapidly. The piezoelectric actuator can reach 20mm displacement in this experiment. The experiments are carried out in two ways: one is drivien by same-direction voltage to piezoelectric element, which is called A-type. And another one driven by opposite-direction voltage, which is called B-type. The actuator experiments investigate the duty ratio and velocity effects, and the effects of the driving voltage on velocity and force. When the duty ratio is 40% or 60 %, the moving velocity of A-type is the fastest. According to experimental results concerning velocities and forces, A-type exhibits more deformation than B-type, so as to induce higher velocity and force. Therefore, A-type performs better than B-type.