The SCALE System

The main objective of the SQUID project is to test a new deployment strategy that will allow to deploy long wire booms at high speed without residual oscillations. The system in charge of performing the deployment of this wire booms is called SCALE and has been developed at KTH.

The SCALE consists of two coaxial cylinders with a small gap between them. On its initial configuration (before deployment), the cable is coiled along this gap between a pulling ring and a feeding system. The feeding system is an aluminium disc with a channel that guides the cable from the gap between the cylinders towards the empty space inside them, where the spherical probes are stored, releasing the wire parallel to the deployment direction (see figures below). When the deployment starts, a motor drives this feeding system, collecting the wire from the gap and redirecting it towards the deployment direction.

Overview of the scale system with the door closed

Detail of the gear system and the coiled wire (outer cylinder not shown)

Detail of the probe inside the SCALE system on the stored position

In order to maintain the stability of the FFU (Free Flying Unit) during its flight it is very important that the deployment of the four wire booms is carried out synchronized otherwise the unit would start tumbling and the controlled deployment would be ruined!


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