Electroactive polymer actuator and compliant mechanism design for space applications
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Author
Borque Gallego, G.
Beco Alburquerque, F.
Grosgurin, T.
Helfer, J.-L.
Pejchal, V.
Liberatoscioli, S.
Onillon, E.
DOI
Abstract
This work introduces a pioneering approach to using electroactive polymer (EAP) actuators in space mechanisms and evaluates their performance under space conditions. EAPs offer unique advantages, for instance being lightweight, highly deformable, and energy-efficient, making them attractive for next-generation spacecraft systems. To demonstrate their potential, a 3D-printed thruster pointing mechanism for small satellites was designed and tested, capable of large-angle motion for electric propulsion. Because EAPs produce lower force than conventional actuators, a novel stiffness-reduction preload system was developed that decreases the required input force by a factor of x25. Extensive testing confirmed that EAP actuators can operate effectively in compliant mechanisms within space environments, while identifying their mechanical limits and performance variations under thermal, vacuum, and radiation conditions. These results highlight EAP technology as a promising candidate for future space actuation systems.
Publication Reference
CSEM Scientific and Technical Report 2025, p. 61–62
Year
2025