FUNCTIONAL ACTUATOR SYSTEMS DRIVEN BY PHOTO-ELECTRIC SOURCE

本文研究了利用电流变液或电共轭液构建高性能的线性作动器系统。这些执行器系统由基于新概念的光电源驱动。光电源及其驱动的发展：采用PLZT元件作为光电源。从理论上分析了PLZT元件尺寸对光电源性能的影响。制作了不同尺寸的PLZT元件，并从光电光源应用的角度对其特性进行了实验评价。实验结果表明，通过优化PLZT元件的尺寸，PLZT元件适用于光电源。提出了利用PLZT元件对光电源进行控制的方法，并得到了能够控制的条件。我们提出了两种使用ECF的线性执行器。它们在电极结构方面有所不同。一个是线圈式电极，另一个是活塞式电极。功能作动器系统的构建：利用ECF中的ERF，即功能流体，开发了线性作动器系统。执行器系统由由PLZT元件组成的光电源控制。首先，对系统中重要的控制元件——电流变换器的特性进行了实验研究。功能作动器系统的设计：得到了ECF线性作动器的负载-速度曲线，并给出了如何利用ERF或ECF设计线性作动器系统。

This research deals with the construction of the linear actuator systems with high function using ERF (Electro-Rheological Fluid) or ECF (Electro-Conjugate Fluid). These actuator systems are driven by a photo-electric source based on the new concept.1. Developments of photo-electric source and its drive : A PLZT Element is used as a photo-electric source. The effect of the size of a PLZT element on the performance of the photo-electric source is analyzed theoretically. The PLZT elements with various sizes are manufactured, and their characteristics are evaluated experimentally from the viewpoint of the application to the photo-electric source. The experimental results show that the PLZT element is applicable to the photo-electric source by optimizing the size of the PLZT element. The control method of the opto-electric source using a PLZT element is proposed, and the conditions being able to control are obtained.2. We propose two types of linear actuators using ECF. They differ in the respect of the construction of the electrodes. The one has a coil type electrodes, and the other a piston type electrodes.3. Constructions of functional actuator systems : We develop the linear actuator systems using ERF of ECF, which are the functional fluids. The actuator systmes are controlled by the photo-electric source consisting of a PLZT elelment. As the first step the characteristics of the ER valve which is an important control element in the system are obtained experimentally.4. Design of functional actuator system : The load-speed cure of the ECF linear actuator is obtained, and it is shown how to design the linear actualtor system using ERF or ECF.