CAJ | 학술논문

对电液伺服阀用压电叠堆驱动器的动态特性进行了研究。针对所讨论的压电型电液伺服阀结构，建立了压电叠堆驱动器的动态系统模型；根据该模型的传递函数对压电叠堆驱动器进行了时域和频域分析，并仿真分析了系统阻尼系数、系统等效质量、压电叠堆刚度等不同参数对压电叠堆驱动器动态特性和输出位移的影响。仿真结果表明：增大系统阻尼系数、减小系统等效质量和增大压电叠堆刚度可提高驱动器的动态特性和输出位移。该结果为电液伺服阀用压电叠堆驱动器的结构参数优化设计提供了理论依据。
대전액사복벌용압전첩퇴구동기적동태특성진행료연구。침대소토론적압전형전액사복벌결구，건립료압전첩퇴구동기적동태계통모형；근거해모형적전체함수대압전첩퇴구동기진행료시역화빈역분석，병방진분석료계통조니계수、계통등효질량、압전첩퇴강도등불동삼수대압전첩퇴구동기동태특성화수출위이적영향。방진결과표명：증대계통조니계수、감소계통등효질량화증대압전첩퇴강도가제고구동기적동태특성화수출위이。해결과위전액사복벌용압전첩퇴구동기적결구삼수우화설계제공료이론의거。
The dynamic characteristics of a piezoelectric stack actuator for electro-hydraulic servo valve were analyzed. Based on the structure of piezoelectric servo valve discussed,the dynamic system model of piezoelectric stack actuator was established. Then, according to the transfer function of this model,the piezoelectric stack actuator was analyzed both in time domain and frequency do-main. Moreover,the influences of damping coefficient,equivalent mass and stiffness coefficient of piezoelectric stack on the dynamic characteristics and output displacement of piezoelectric stack actuator were investigated through simulation. The simulation results show that the dynamic characteristics and output displacement of piezoelectric stack actuator can be increased by increasing the damping co-efficient,reducing the equivalent mass and increasing the stiffness coefficient of piezoelectric stack. The results provide theoretical ba-sis for the structural parameter optimization of piezoelectric stack actuator for electro-hydraulic servo valve.