Position control of PLZT bimorph-type optical actuator by on-off control
Position control of PLZT bimorph-type optical actuator by on-off control
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DOI：
10.1109/iecon.1997.668524
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发表时间：
1997-11
期刊：
影响因子：
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通讯作者：
Y. Morikawa;T. Nakada
中科院分区：
文献类型：
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作者：
Y. Morikawa;T. Nakada
由PLZT元件组成的光学执行器是一种主动利用光的能量和信息的新型执行器，并且对电磁噪声具有固有的鲁棒性。 PLZT是一种在紫外线照射下通过光致伸缩效应产生机械应变的元素。由于元件的位移很小，我们对光学执行器采用双压电晶片结构以增加位移。在本文中，我们提出了一种有效的双压电晶片型光学执行器位置控制方法；其有效性已被实验证实。由于控制光照射的机械快门具有较大的时滞，因此简单的开关控制不足以控制光学致动器。系统中引入了一种考虑光致动器和快门动态响应的新控制方法，提高了光致动器的精度和响应速度。
An optical actuator consisting of PLZT elements is a new type of actuator that makes active use of energy and information of light, and is inherently robust to electromagnetic noise. PLZT is an element that produces mechanical strain by the photostrictive effect when irradiated by ultraviolet light. Since displacement of the element is very small, we adopt a bimorph structure for the optical actuator to increase the displacement. In this paper, we propose an effective position control method for the bimorph-type optical actuator; its validity is confirmed by experiments. A simple on-off control is insufficient to control the optical actuator because the mechanical shutters controlling light irradiation have a large time lag. A new control method, taking into account the dynamic response of the optical actuator and the shutters is introduced into the system, and improves the precision and response speed of the optical actuator.