Modeling of the deployment of transformable space structures with a shape memory alloy actuator

Currently, the design of large space structures attracts engineers due to the need to solve pressing problems in the area of creating promising space systems for longitudinal operation in the outer space. A special class of space systems is formed by transformable structures whose layout can be transformed. Usually, the structures of this class are delivered to the working orbit in the densely-packed position. When the orbit having the required parameters is reached, the structure is deployed. The deployment is done by force actuators, for example, springs, electric motors, and so on. Transformable space structures are multiple-element systems comprised of many interconnected elements. Despite massive progress in the area of designing such structures, the task of ensuring smoothness and reliability of the deployment of structures with guaranteed functioning after deployment is still relevant. The paper proposes using actuators based on shape memory alloys to ensure controlled deployment of large transformable structures. Experimental investigations of a simple actuator based on the Ti-Ni alloy element confirmed the possibility of using it for the deployment of transformable space structures.