Photonic control of flexible structures—application to a free-floating parabolic membrane shell
Photonic control of flexible structures—application to a free-floating parabolic membrane shell
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DOI：
10.1088/0964-1726/18/11/115019
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发表时间：
2009-11
影响因子：
4.1
通讯作者：
H. Shih;H. Tzou;Wilbur Walters
中科院分区：
文献类型：
--
作者：
H. Shih;H. Tzou;Wilbur Walters
本文研究了利用光致伸缩驱动器对自由漂浮柔性抛物面壳体的光子控制。抛物线旋转壳被认为是所有壳体和非壳体结构中最困难的几何形式之一。基于此，给出了一种估算光致伸缩耦合抛物壳体的动力学行为和光致控制力的近似方法。在近似球面模型的基础上，分析了驱动器位置以及薄膜和弯曲部件对控制作用的影响。分析结果表明，控制力与位置有关。薄膜的控制作用比弯曲控制作用要大得多。通过比较近似等效球壳模型和抛物线壳模型得到的光致伸缩耦合壳体的光致控制力，验证了近似模型的正确性。由比较可知，对于焦距长径比大于等于1.00的表面，球壳与抛物线的差别不大。
In this paper, the photonic control of free-floating flexible parabolic shells using photostrictive actuators is investigated. The parabolic shell of revolution is considered to be one of the most difficult geometries among all shell and non-shell structures. Because of this, an approximate way to estimate the dynamic behavior and light-induced control forces for a photostrictive coupled parabolic shell is presented. On the basis of the approximate spherical model, the effects of actuator locations as well as membrane and bending components on the control action are analyzed. The analysis results presented show that the control forces are location dependent. It is also shown that the membrane control action is much more significant than the bending control action. The validation of the approximate model is done by comparing the light-induced control forces of the photostrictive coupled shells obtained using the approximate equivalent spherical shell model and those obtained using the parabolic shell model. From the comparison, it can be concluded that there is only a slight difference between a spherical shell and a parabola for a surface with a focal length to diameter ratio of 1.00 or larger.