Study on Downsizing of Impact Drive Mechanism Actuator Using a Shape Memory Alloy Wire
Y. Iwago, M. Hara, H. Nabae, and T. Higuchi
The University of Tokyo, Tokyo, Japan
Our previous study has proposed an Impact Drive Mechanism (IDM) using a shape memory alloy (SMA) wire and characterized the basic performance using a prototype actuator. The size of the prototype IDM actuator (it was relatively large) was one of open questions for the practical applications. This paper, in particular, examines downsizing of the SMA-wire-based IDM actuator. First, the influence of downsizing is investigated using a downsized actuator. The driving experiments imply that the downsized actuator could achieve bidirectional movement in lower voltage. This paper also introduces a simulator based on a simple model of the proposed actuator in which the SMA wire is simply considered as a spring which contracts and extends due to the temperature change. The simulator allows further estimating the influence of downsizing and helps us to design the downsized SMA-wire-based IDM actuator.
ACTUATOR 2014 Manuskript B2.2
Publication date: 10/04/2015
Manuscript B2.2 published in Conference Proceedings ACTUATOR 2014
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