Abstract
Super elastic alloy has the characteristic of good reversible flexibility and active deformation caused by transformation between austenite and martensite. The alloy has also hysteresis characteristic changed by prestress. Then, the alloy can use as actuator because of the change. In this paper, the active deformation of the alloy wire on the prestressed conditions is experimentally proofed by Joule heating. So a system with 1 DOF using the alloy wire is designed and constructed with measurement system. In conclusion, the alloy can perform very well as actuator under optimum condition. Final goal of this study is that the actuator will be used in domestic robot.