Tensegrity structure using magnetostrictive element actuators Experimental verification of shape control

Abstract

In this research, new space structures are developed to develop space exploration. We believe that precise shape control of tensegrity structures, one of the modular structures, may lead to the development of new space structures. The advantage of using tensegrity structures is that they require less material because they consist only of compression and tension materials, and they do not need to consider bending loads because they only use tension and compression forces. However, although tensegrity structures have been used in many works of art, they have not been put to practical use due to the difficulties of design and fabrication. Therefore, we thought it would be possible to develop an actuator with a self-detecting function, which would enable precise shape control of tensegrity structures. This is made possible by a magnetostrictive element, which is a metallic material consisting mainly of iron. Magnetostrictive elements are characterized by the fact that they distort when a magnetic field is applied, and when they distort, a magnetic field is generated around them. The ability to precisely control the shape of the device would reduce the cost of transporting it into space by reducing the number of different materials used, and simplify the assembly of space structures.