FUNCTIONAL ACTUATOR SYSTEMS DRIVEN BY PHOTO-ELECTRIC SOURCE

本研究探讨利用电流变液或电共轭液构造高性能的直线驱动器系统。这些致动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。制造了各种尺寸的PLZT元件，并从应用于光电源的角度对它们的特性进行了实验评估。实验结果表明，通过对PLZT元件尺寸的优化，PLZT元件可用于光电源。提出了采用PLZT元件的光电源的控制方法，并得到了能够控制的条件.我们提出了两种类型的线性执行器使用ECF。它们在电极的构造方面不同。一个是线圈式电极，另一个是活塞式电极.功能驱动器系统的构建：我们开发了线性驱动器系统，使用ECF的ERF，这是功能流体。驱动系统由PLZT元件组成的光电源控制。作为第一步，对系统中的重要控制元件电流变阀的特性进行了实验研究.功能作动器系统的设计：得到了电动势直线作动器的负载-速度曲线，并说明了如何利用电流变液或电动势设计直线作动器系统。

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.