Development of an actuator using a metal hydride and its application to a lifter for the disabled

Tadayuki Sasaki, Toshio Kawashima, Hideki Aoyama, Takatoshi Ogawa, Tohru Ifukube

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Metal hydrides can absorb and desorb hydrogen in a reversible reaction by heating or cooling the hydrides, respectively. We have developed an actuator consisting of metal hydrides covered with a copper case (diameter 23 mm, height 6 mm), Peltier elements (38 mm x 38 mm x 5 mm) to heat or cool the hydrides, and a cylinder (diameter 46 mm, height 73 mm) with metal bellows. From the experimental results, it was found that the velocity of hydrogen absorption was faster than the desorption; however, its velocity increased as the weight of the load on the cylinder increased. The actuator could produce a one stroke displacement of 25 mm within 50 s in the case of a 22.5 kg load weight. Furthermore, a double acting type metal hydride actuator composed of a hydraulic cylinder, Peltier elements, and metal hydrides was developed and applied to a lifter for the disabled.

Original languageEnglish
Pages (from-to)277-286
Number of pages10
JournalAdvanced Robotics
Issue number3
Publication statusPublished - 1987
Externally publishedYes

ASJC Scopus subject areas

  • Software
  • Control and Systems Engineering
  • Human-Computer Interaction
  • Hardware and Architecture
  • Computer Science Applications


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