摘要
针对微型无人机在受到外界干扰时通过自适应控制来实现飞行的稳定性设计了一种多片压电双晶片并联驱动的新型驱动器。用功率放大器和频谱分析仪分别对驱动器的在空载和带载情况下的静态特性和动态特性进行了测试,分析比较了在不同负载下单片压电双晶片和双片压电双晶片组成的驱动器的驱动能力,测得了双片压电双晶片并联驱动器的输出位移和驱动电压之间的传递函数。实验结果表明:该驱动器不仅可以实现位移放大,而且可以通过多片压电双晶片并联补偿驱动器的输出力,为设计新型压电双晶片驱动器提供了新的思路,同时为压电双晶片驱动器的自适应控制提供了参考。
A kind of novel actuator using multiple piezoelectric bimorphs parallel actuator is designed for stability of micro_unmanned aerial vehicle by self-adaptive control when it is subject to external disturb- ances. The static and dynamic characteristics of the actuator with no-load and load are measured by the power amplifier and the frequency spectral analyzer. The driving ability of the actuators composed of si- ngle piezoelectric bimorph and double piezoelectric bimorphs is analyzed and compared in different loads. The transfer function between the displacement of the double piezoelectric bimorphs actuator and the driving voltage is obtained. Experimental results indicate that the actuator can amplify the displacement and compensate the output force by multiple piezoelectric bimorph parallel connection. This paper pro- vides new methods for designing piezoelectric bimorph actuator and a reference for the self-adaptive con- trol of the piezoelectric bimorph actuator.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2009年第3期339-343,共5页
Journal of Nanjing University of Aeronautics & Astronautics
基金
国家自然科学基金(60535020)重点资助项目
航空科学基金(2008ZD52047)资助项目
关键词
压电双晶片
位移放大机构
并联驱动器
piezoelectric actuator
displacement magnification mechanism
parallel actuator
