CAJ | 학술논문

设计制作了一种采用双晶片压电陶瓷结构的棒板结合式压电驱动器.和瓷片分别粘接在青铜定子的上下两侧.定子上的金属圆柱体被用来放大振动的横向位移,并对金属棒状的转子进行激振,使其旋转.利用有限元分析(FEA)对定子进行了分析,发现在同样的驱动模式下,与传统的单片陶瓷片驱动器相比,该驱动器可以提供更多的横向和纵向的振动位移,大约提高25%左右.这种新结构也可避免不同振动模式之间的模态耦合现象,并产生理想的振动模态,以提高驱动器的运行稳定性.实验表明,驱动器在25 Vo-p低电压下可以提供512r/rain的转速,而单片陶瓷驱动器在该电压下不能工作.这种压电驱动器可以经过优化和调整来满足不同的实际应用,如精确定位仪器,生物工程和光聚焦系统等.
설계제작료일충채용쌍정편압전도자결구적봉판결합식압전구동기.화자편분별점접재청동정자적상하량측.정자상적금속원주체피용래방대진동적횡향위이,병대금속봉상적전자진행격진,사기선전.이용유한원분석(FEA)대정자진행료분석,발현재동양적구동모식하,여전통적단편도자편구동기상비,해구동기가이제공경다적횡향화종향적진동위이,대약제고25%좌우.저충신결구야가피면불동진동모식지간적모태우합현상,병산생이상적진동모태,이제고구동기적운행은정성.실험표명,구동기재25 Vo-p저전압하가이제공512r/rain적전속,이단편도자구동기재해전압하불능공작.저충압전구동기가이경과우화화조정래만족불동적실제응용,여정학정위의기,생물공정화광취초계통등.
A disk-pivot structure micro piezoelectric actuator with bimorph is designed.Different from the piezoelectric actuators described in reference papers,two piezoelectric discs in the actuator are bonded on the both sides of the bronze stator.The metal cylinder on the stator is used to amplify the transverse displacement and to actuate the metal rod rotor to rotate.The stator is analysed using Finite Element Analysis(FEA),the results show that the actuator can provide more transverse and vertical displacements than the previous prototype with only one ceramic disc under the same driving and boundary conditions,the improvements can be nearly 25%.This new structure can also avoid the coupling phenomena between different vibration modes and generate identical modal shape to enhance the stability of the actuator.Experiments illustrate that under the driving voltage 25 Vo-p,the actuator with only one ceramic disc can not run and the actuator with bimorph structure still has a speed of 512r/min.Such piezoelectric actuator can be optimized and adj usted to satisfy different practical applications,such as precise positioning instrument,bioengineering and optical foCUS system,etc..