Simulating electrostrictive deformable mirrors: I. Nonlinear static analysis
Simulating electrostrictive deformable mirrors: I. Nonlinear static analysis
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DOI：
10.1088/0964-1726/8/5/319
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发表时间：
1999-10
影响因子：
4.1
通讯作者：
C. Hom;P. Dean;S. Winzer
中科院分区：
文献类型：
--
作者：
C. Hom;P. Dean;S. Winzer
建立了可变形镜的机电模型，作为自适应光学系统的设计工具。该模型由多层电致伸缩执行器驱动的连续镜像面片组成。一个完全耦合的本构律模拟了执行器的非线性机电行为，而有限元计算确定了阵列观察到的反射镜的机械刚度。镜/致动器系统的静态分析将不同的电输入阵列与镜面变形联系起来。该模型还考察了内应力对有源阵列机电性能的非线性影响以及相邻单元间的量化串扰。静态模型的数值预测与实际反射镜系统的实验测量结果吻合较好。该模型还用于模拟可变形镜对热爆激光束校正的系统级性能。非线性分析确定了相位补偿所需的执行器指令电压，以及由此产生的波前误差。
An electromechanical model of a deformable mirror was developed as a design tool for adaptive optical systems. The model consisted of a continuous, mirrored face sheet driven with multilayered, electrostrictive actuators. A fully coupled constitutive law simulated the nonlinear, electromechanical behavior of the actuators, while finite element computations determined the mirror's mechanical stiffness observed by the array. Static analysis of the mirror/actuator system related different electrical inputs to the array with the deformation of the mirrored surface. The model also examined the nonlinear influence of internal stresses on the active array's electromechanical performance and quantified crosstalk between neighboring elements. The numerical predictions of the static model agreed well with experimental measurements made on an actual mirror system. The model was also used to simulate the systems level performance of a deformable mirror correcting a thermally bloomed laser beam. The nonlinear analysis determined the commanded actuator voltages required for the phase compensation, and the resulting wavefront error.