Abstract
The ER suspension behaves like a Bingham fluid having yield stress, which can be rapidly changed in a reversible manner by applying electric field. The advantages are a simple and compact construction, and the response time of several m sec order. In this research, at first, the pressure response and flow behavior of ER suspension across a micro gap channel of ER valve have been investigated. Based on the results, three ports micro-bellows-actuator driven by a pair of micro ER valve has been designed and fabricated by photolithography for the use of controlling one unit of tactile-pin for Braille display system. The relationship between the ER fluid supply pressure and the actuator force is discussed to determine enough force to push up the Braille tactile-pin.
