摘要
为了在光束稳定控制系统中更好地对高速倾斜镜(FSM)实现稳定、精确地控制,对于由超磁致伸缩材料(GMM)作为位移产生元件的高速倾斜镜,根据GMM材料的特性和倾斜镜的运动机理,经推导建立了倾斜镜的传递函数模型,并结合实测的倾斜镜幅频和相频响应特性,在Matlab软件中利用Levy法对倾斜镜的传递函数进行了辨识,得到了精确的倾斜镜传递函数。与实测结果相比,在中低频段,幅度辨识误差在0.3 dB以内,相位辨识误差在5°以内,结果表明:通过理论推导建立的倾斜镜模型是合理有效的,对于改善该倾斜镜在应用系统中的稳定性和精度提供了依据。
The fast steering mirror （FSM） was widely used in beam stabilization controlling systems. In order to ensure the FSM work more stably and precisely, the transfer function model of the FSM was deduced using giant magnetostrictive material as the displacement generator based on the material’s physical properties and the dynamic characteristics of the FSM. With the actual measured result of the FSM’s amplitude frequency response characteristics and phase frequency response characteristics, the accurate transfer function of the FSM was identified using the levy identification algorithm in the matlab software. Compared with the actual measured result, we concluded that the error of the transfer function obtained by identification is under 0.5 dB in magnitude and 5o in phase in the low and intermediate frequency range. The result shows that the transfer function model deduced is reasonable and supplied theoretic reference of how to improve FSM’s performance in its application system.
出处
《红外与激光工程》
EI
CSCD
北大核心
2013年第10期2748-2752,共5页
Infrared and Laser Engineering
基金
安徽大学研究生学术创新研究项目(01001770-10117700471)
