Developing Stronger, Lighter Antenna Components For Use Off-Planet

Raug Space, with the support of Altair ProductDesign in Troy, MI has built a redesigned, optimized antenna support for an Earth observation satellite, to be produced using industrial additive manufacturing, or 3D printing. The objective was to create an aluminum component that would be significantly stiffer while at the same time lighter, taking full advantage of the design freedom afforded by 3D printing.

Design freeze was reached after only four weeks after work was begun on the project. The component was then manufactured with a 3D printer, with no need of further design adjustments. Using topology optimization in conjunction with additive manufacturing, the team achieved elite weight and stiffness performance characteristics not possible using conventional analysis and manufacturing techniques.

EOS, a German industrial 3D printing company, contributed its additive manufacturing expertise, handling the manufacturing of the aluminum components. Weight reduction is a decisive factor in the space industry since the lighter a satellite is, the less it costs to launch. Some 40 centimeters long, the antenna support is one of the longest metal components ever produced using the powder bed manufacturing method. To check that the new support is ready for use in space, it is currently undergoing a battery of intensive qualification tests that are scheduled to be completed by the end of the year.

"Our goal is to equip one of the future Sentinel-1 satellites with antenna support components that have been manufactured using an industrial 3D printer," explained Michael Pavloff, Chief Technical Officer at RUAG Space. He went on to add that the production of this antenna support was by no means a one-off. "3D printing has enormous potential for our business, and we are currently in the process of developing further space applications. In the future it will be possible to create entire satellite structures using a 3D printer. This means that electrical harnesses, reflectors, heating pipes, and other assemblies that today still have to be manufactured individually could then be integrated directly into the structural elements," Pavloff concludes.

Raug Space has been conducting intensive research and development work on how to print objects in three dimensions since 2013. Making a metal 3D print involves building up layers of powder and joining them together to form the desired shape in an automated process of laser sintering.

"At Altair we were delighted to contribute to such a significant milestone in satellite design. The collaboration with Raug Space and EOS allowed us to deliver even more innovative end-to-end design and optimization processes to exploit the benefits of additive manufacturing," said Pietro Cervellera, Managing Director Altair GmbH.

The project was presented at the ESA Conference in Noordwijk, Netherlands.

(Image provided by Altair)

FMI: www.eos.info, www.altair.com