Development of a non-explosive release actuator using shape memory alloy wire
Young Ik Yoo, Ju Won Jeong, Jae Hyuk Lim, Kyung-Won Kim, Do-Soon Hwang, and Jung Ju Lee
We have developed a newly designed non-explosive release actuator that can replace currently used release devices. The release mechanism is based on a separation mechanism, which relies on segmented nuts and a shape memory alloy (SMA) wire trigger. A quite fast and simple trigger operation is made possible through the use of SMA wire. This actuator is designed to allow a high preload with low levels of shock for the solar arrays of medium-size satellites. After actuation, the proposed device can be easily and instantly reset. Neither replacement, nor refurbishment of any components is necessary. (Click on the link to read more).