Roll-Out Solar Array

A development log of deployable boom mechanisms and a roll-out solar array system inspired by the International Space Station's iROSA (Roll-Out Solar Array) technology.

Mechanism Overview

The core of this project focuses on using bistable composite booms to deploy a flexible solar blanket. This compact storage method allows for significant power generation capability in small satellites without the volume constraints of rigid panels.

The design was heavily influenced by the ISS iROSA deployment mechanism, adapting those large-scale principles for smaller, cost-effective applications.

Design Advantages & Integration

Beyond solar power generation, the rolling mandrel design offers critical structural benefits. During launch, the mandrel acts as a protective core, shielding the fragile solar blanket from acoustic vibrations and mechanical loads.

Furthermore, this architecture enables multi-functional utility. The blanket itself can host embedded patch antennae, or the entire deployable structure can be utilized as a large-aperture antenna array. This dual-use capability allows the mechanism to serve simultaneously as a power generation system and a high-gain RF communication system, optimizing the volume-constrained envelope of small satellites.

Additionally, the foldable solar cell prototype significantly simplifies the electrical architecture by eliminating the need for a slip ring. In alternative designs where booms are encased in an axle positioned near the satellite bus, slip rings are usually required to transfer power across moving interfaces. This design removes that complexity, reducing both mass and potential failure points.

Deployment Testing

Iterative testing was crucial to ensure smooth deployment without jamming or damaging the simulated solar blanket.